Init commit

2024-01-10 12:33:05 +01:00
commit 09f81a5899
32 changed files with 2737 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
--- a/.woodpecker/build.yaml
+++ b/.woodpecker/build.yaml
@@ -0,0 +1,28 @@
+# Build a container image
+when:
+  event:
+    - push
+steps:
+  build:
+    image: git.badhouseplants.net/badhouseplants/badhouseplants-builder:555262114ea81f6f286010474527f419b56d33a3
+    name: Build helmule operator image
+    privileged: true
+    environment:
+      - PACKAGE_NAME=allanger/helmule
+    commands:
+      - |
+        if [[ "${CI_COMMIT_TAG}" ]]; then
+          export CUSTOM_TAG="${CI_COMMIT_TAG}";
+        fi
+      - build-container
+    secrets:
+      - gitea_token
+    backend_options:
+      kubernetes:
+        resources:
+          requests:
+            memory: 800Mi
+            cpu: 500m
+          limits:
+            memory: 1000Mi
+            cpu: 1000m
--- a/Cargo.lock
+++ b/Cargo.lock
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -0,0 +1,23 @@
+[package]
+name = "helmule"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+base64 = "0.21.5"
+chrono = "0.4.31"
+clap = { version = "4.4.11", features = ["derive"] }
+dircpy = "0.3.15"
+env_logger = "0.10.1"
+handlebars = "5.0.0"
+log = "0.4.20"
+regex = "1.10.2"
+semver = "1.0.20"
+semver_sort = "1.0.0"
+serde = { version = "1.0.193", features = ["derive"] }
+serde_json = "1.0.110"
+serde_yaml = "0.9.29"
+tempfile = "3.9.0"
+time = { version = "0.3.31", features = ["serde", "formatting", "parsing"]}
--- a/30
+++ b/30
@@ -0,0 +1,30 @@
+FROM rust:1.70.0-alpine3.18 as builder
+WORKDIR /src
+RUN apk update && apk add --no-cache gcc musl-dev
+COPY ./ .
+RUN rustup default nightly && rustup update
+RUN cargo build --release --jobs 2 -Z sparse-registry 
+
+FROM ghcr.io/allanger/dumb-downloader as dudo
+RUN apt-get update -y && apt-get install tar git -y
+ARG HELM_VERSION=v3.13.3
+ARG YQ_VERSION=v4.40.5
+ENV RUST_LOG=info
+RUN dudo -l "https://get.helm.sh/helm-{{ version }}-{{ os }}-{{ arch }}.tar.gz" -d /tmp/helm.tar.gz -p $HELM_VERSION
+RUN dudo -l "https://github.com/mikefarah/yq/releases/download/{{ version }}/yq_{{ os }}_{{ arch }}.tar.gz" -d /tmp/yq.tar.gz -p $YQ_VERSION
+RUN tar -xf /tmp/helm.tar.gz  -C /tmp && rm -f /tmp/helm.tar.gz 
+RUN tar -xf /tmp/yq.tar.gz  -C /tmp && rm -f /tmp/yq.tar.gz 
+RUN mkdir /out
+RUN cp `find /tmp | grep helm` /out/
+RUN mv `find /tmp | grep yq_` /out/yq
+RUN chmod +x /out/helm
+RUN chmod +x /out/yq
+
+FROM alpine:3.18
+RUN apk update && apk add --no-cache git
+COPY --from=builder /src/target/release/helmule /bin/helmule
+COPY --from=dudo /out/ /usr/bin
+WORKDIR /workdir
+ENTRYPOINT ["/bin/helmule"]
+
+
--- a/examples/extensions/flux2/crd-configmap.yaml
+++ b/examples/extensions/flux2/crd-configmap.yaml
@@ -0,0 +1,28 @@
+{{/*
+We have to create individual configmaps for each CRD - they exceed the total
+allowed length for a configmap if they are combined.
+*/}}
+{{ $currentScope := . }}
+{{- if .Values.crds.install }}
+  {{- range $path, $_ := .Files.Glob "crd-base/**" }}
+    {{- with $currentScope }}
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ include "crdInstall" . }}-{{ $path | base | trimSuffix ".yaml" }}
+  namespace: {{ .Release.Namespace | quote }}
+  annotations:
+    # create hook dependencies in the right order
+    "helm.sh/hook-weight": "-5"
+    {{- include "crdInstallAnnotations" . | nindent 4 }}
+  labels:
+    app.kubernetes.io/component: {{ include "crdInstall" . | quote }}
+    {{- include "labels.selector" . | nindent 4 }}
+    role: {{ include "crdInstallSelector" . | quote }}
+data:
+  content: |
+{{ tpl (.Files.Get $path) . | indent 4 }}
+    {{- end }}
+  {{- end }}
+{{- end }}
--- a/examples/extensions/flux2/crd-job.yaml
+++ b/examples/extensions/flux2/crd-job.yaml
@@ -0,0 +1,80 @@
+{{- if .Values.crds.install }}
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: {{ include "crdInstallJob" . }}
+  namespace: {{ .Release.Namespace | quote }}
+  annotations:
+    # create hook dependencies in the right order
+    "helm.sh/hook-weight": "-1"
+    {{- include "crdInstallAnnotations" . | nindent 4 }}
+  labels:
+    app.kubernetes.io/component: {{ include "crdInstall" . | quote }}
+    {{- include "labels.selector" . | nindent 4 }}
+    role: {{ include "crdInstallSelector" . | quote }}
+spec:
+  ttlSecondsAfterFinished: 3600
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/component: {{ include "crdInstall" . | quote }}
+        {{- include "labels.selector" . | nindent 8 }}
+    spec:
+      serviceAccountName: {{ include "crdInstall" . }}
+      securityContext:
+        runAsUser: 1000
+        runAsGroup: 2000
+        {{- if ge (int .Capabilities.KubeVersion.Minor) 19 }}
+        {{- with .Values.crds.podSeccompProfile }}
+        seccompProfile:
+          {{- . | toYaml | nindent 10 }}
+        {{- end }}
+        {{- end }}
+      tolerations:
+      - key: node-role.kubernetes.io/master
+        effect: NoSchedule
+      - key: node-role.kubernetes.io/control-plane
+        effect: NoSchedule
+      containers:
+      - name: kubectl
+        image: "{{ .Values.images.registry }}/giantswarm/docker-kubectl:1.23.6"
+        command:
+        - sh
+        - -c
+        - |
+          set -o errexit ; set -o xtrace ; set -o nounset
+
+          # piping stderr to stdout means kubectl's errors are surfaced
+          # in the pod's logs.
+
+          kubectl apply -f /data/ 2>&1
+        securityContext:
+          readOnlyRootFilesystem: true
+          {{- if ge (int .Capabilities.KubeVersion.Minor) 19 }}
+          {{- with .Values.crds.seccompProfile }}
+          seccompProfile:
+            {{- . | toYaml | nindent 12 }}
+          {{- end }}
+          {{- end }}
+        volumeMounts:
+{{- range $path, $_ := .Files.Glob "crd-base/**" }}
+        - name: {{ $path | base | trimSuffix ".yaml" }}
+          mountPath: /data/{{ $path | base }}
+          subPath: {{ $path | base }}
+{{- end }}
+        resources: {{- toYaml .Values.crds.resources | nindent 10 }}
+      volumes:
+{{ $currentScope := . }}
+{{- range $path, $_ := .Files.Glob "crd-base/**" }}
+    {{- with $currentScope }}
+      - name: {{ $path | base | trimSuffix ".yaml" }}
+        configMap:
+          name: {{ include "crdInstall" . }}-{{ $path | base | trimSuffix ".yaml" }}
+          items:
+          - key: content
+            path: {{ $path | base }}
+{{- end }}
+{{- end }}
+      restartPolicy: Never
+  backoffLimit: 4
+{{- end }}
--- a/examples/extensions/flux2/crd-np.yaml
+++ b/examples/extensions/flux2/crd-np.yaml
@@ -0,0 +1,59 @@
+{{- if .Values.crds.install }}
+{{- if .Capabilities.APIVersions.Has "cilium.io/v2/CiliumNetworkPolicy" }}
+apiVersion: cilium.io/v2
+kind: CiliumNetworkPolicy
+metadata:
+  name: {{ include "crdInstall" . }}
+  namespace: {{ .Release.Namespace | quote }}
+  annotations:
+    # create hook dependencies in the right order
+    "helm.sh/hook-weight": "-7"
+    {{- include "crdInstallAnnotations" . | nindent 4 }}
+  labels:
+    app.kubernetes.io/component: {{ include "crdInstall" . | quote }}
+    {{- include "labels.selector" . | nindent 4 }}
+    role: {{ include "crdInstallSelector" . | quote }}
+spec:
+  egress:
+    - toEntities:
+        - kube-apiserver
+  endpointSelector: {}
+{{- else }}
+kind: NetworkPolicy
+apiVersion: networking.k8s.io/v1
+metadata:
+  name: {{ include "crdInstall" . }}
+  namespace: {{ .Release.Namespace | quote }}
+  annotations:
+    # create hook dependencies in the right order
+    "helm.sh/hook-weight": "-7"
+    {{- include "crdInstallAnnotations" . | nindent 4 }}
+  labels:
+    app.kubernetes.io/component: {{ include "crdInstall" . | quote }}
+    {{- include "labels.selector" . | nindent 4 }}
+    role: {{ include "crdInstallSelector" . | quote }}
+spec:
+  podSelector:
+    matchLabels:
+      app.kubernetes.io/component: {{ include "crdInstall" . | quote }}
+      {{- include "labels.selector" . | nindent 6 }}
+  # allow egress traffic to the Kubernetes API
+  egress:
+    - ports:
+        - port: 443
+          protocol: TCP
+        # legacy port kept for compatibility
+        - port: 6443
+          protocol: TCP
+      to:
+    {{- range tuple "10.0.0.0/8" "172.16.0.0/12" "192.168.0.0/16" "100.64.0.0/10" }}
+        - ipBlock:
+            cidr: {{ . }}
+    {{- end }}
+  # deny ingress traffic
+  ingress: []
+  policyTypes:
+    - Egress
+    - Ingress
+{{- end }}
+{{- end }}
--- a/examples/extensions/flux2/crd-rbac.yaml
+++ b/examples/extensions/flux2/crd-rbac.yaml
@@ -0,0 +1,62 @@
+{{- if .Values.crds.install }}
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: {{ include "crdInstall" . }}
+  namespace: {{ .Release.Namespace | quote }}
+  annotations:
+    # create hook dependencies in the right order
+    "helm.sh/hook-weight": "-3"
+    {{- include "crdInstallAnnotations" . | nindent 4 }}
+  labels:
+    app.kubernetes.io/component: {{ include "crdInstall" . | quote }}
+    {{- include "labels.selector" . | nindent 4 }}
+    role: {{ include "crdInstallSelector" . | quote }}
+rules:
+- apiGroups:
+  - ""
+  resources:
+  - jobs
+  verbs:
+  - create
+  - delete
+- apiGroups:
+  - apiextensions.k8s.io
+  resources:
+  - customresourcedefinitions
+  verbs:
+  - create
+  - delete
+  - get
+  - patch
+- apiGroups:
+  - policy
+  resources:
+  - podsecuritypolicies
+  resourceNames:
+  - {{ include "crdInstall" . }}
+  verbs:
+  - use
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: {{ include "crdInstall" . }}
+  namespace: {{ .Release.Namespace | quote }}
+  annotations:
+    # create hook dependencies in the right order
+    "helm.sh/hook-weight": "-2"
+    {{- include "crdInstallAnnotations" . | nindent 4 }}
+  labels:
+    app.kubernetes.io/component: {{ include "crdInstall" . | quote }}
+    {{- include "labels.common" . | nindent 4 }}
+    role: {{ include "crdInstallSelector" . | quote }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: {{ include "crdInstall" . }}
+subjects:
+  - kind: ServiceAccount
+    name: {{ include "crdInstall" . }}
+    namespace: {{ .Release.Namespace | quote }}
+{{- end }}
--- a/examples/extensions/flux2/crd-serviceaccount.yaml
+++ b/examples/extensions/flux2/crd-serviceaccount.yaml
@@ -0,0 +1,15 @@
+{{- if .Values.crds.install }}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ include "crdInstall" . }}
+  namespace: {{ .Release.Namespace }}
+  annotations:
+    # create hook dependencies in the right order
+    "helm.sh/hook-weight": "-4"
+    {{- include "crdInstallAnnotations" . | nindent 4 }}
+  labels:
+    app.kubernetes.io/component: {{ include "crdInstall" . | quote }}
+    {{- include "labels.selector" . | nindent 4 }}
+    role: {{ include "crdInstallSelector" . | quote }}
+{{- end }}
--- a/examples/extensions/vaultwarden/virtual-service.yaml
+++ b/examples/extensions/vaultwarden/virtual-service.yaml
@@ -0,0 +1,30 @@
+{{- if .Values.virtualservice.enabled -}}
+{{- $fullName := include "vaultwarden.fullname" . -}}
+{{- $svcPort := .Values.service.port -}}
+{{- if $.Capabilities.APIVersions.Has "networking.istio.io/v1beta1" }}
+apiVersion: networking.istio.io/v1beta1
+kind: VirtualService
+metadata:
+  name: {{ $fullName }}
+  labels:
+    {{- include "vaultwarden.labels" . | nindent 4 }}
+  {{- with .Values.ingress.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+spec:
+  gateways:
+    - {{ .Values.virtaulservice.gatewayRef }}
+  hosts:
+    - ci.badhouseplants.ne
+  http:
+    - match:
+        - uri:
+            prefix: /
+      route:
+        - destination:
+            host: woodpecker-ci-server
+            port:
+              number: 80
+{{- end }}
+{{- end }}
--- a/examples/patches/flux-regexp/patch.yaml
+++ b/examples/patches/flux-regexp/patch.yaml
@@ -0,0 +1,51 @@
+---
+name: Remove CRDs leftovers from values
+targets:
+  - values.yaml
+before: |-
+  installCRDs: true
+  crds:
+    # -- Add annotations to all CRD resources, e.g. "helm.sh/resource-policy": keep
+    annotations: \{\}
+after: |-
+  crds:
+    install: true
+
+    # Add seccomp to pod security context
+    podSeccompProfile:
+      type: RuntimeDefault
+
+    # Add seccomp to container security context
+    seccompProfile:
+      type: RuntimeDefault
+
+    resources:
+      requests:
+        memory: "128Mi"
+        cpu: "250m"
+      limits:
+        memory: "256Mi"
+        cpu: "500m"
+
+---
+name: Append crd install data to helpers
+targets:
+  - templates/_helper.tpl
+after: |-
+  {{- define "crdInstall" -}}
+  {{- printf "%s-%s" ( include "name" . ) "crd-install" | replace "+" "_" | trimSuffix "-" -}}
+  {{- end -}}
+
+  {{- define "crdInstallJob" -}}
+  {{- printf "%s-%s-%s" ( include "name" . ) "crd-install" .Chart.AppVersion | replace "+" "_" | replace "." "-" | trimSuffix "-" | trunc 63 -}}
+  {{- end -}}
+
+  {{- define "crdInstallAnnotations" -}}
+  "helm.sh/hook": "pre-install,pre-upgrade"
+  "helm.sh/hook-delete-policy": "before-hook-creation,hook-succeeded,hook-failed"
+  {{- end -}}
+
+  {{/* Create a label which can be used to select any orphaned crd-install hook resources */}}
+  {{- define "crdInstallSelector" -}}
+  {{- printf "%s" "crd-install-hook" -}}
+  {{- end -}}
--- a/examples/patches/git/patch-2.diff
+++ b/examples/patches/git/patch-2.diff
@@ -0,0 +1,34 @@
+diff --git a/values.yaml b/values.yaml
+index 7ed6839..2b144ad 100644
+--- a/values.yaml
+++ b/values.yaml
+@@ -1,6 +1,6 @@
+ image:
+   repository: registry.hub.docker.com/vaultwarden/server
+-  pullPolicy: IfNotPresent
+  pullPolicy: Always
+   # Overrides the image tag whose default is the chart appVersion.
+   tag: ""
+ imagePullSecrets: []
+@@ -10,13 +10,14 @@ podAnnotations: {}
+ podSecurityContext: {}
+ # fsGroup: 2000
+ 
+-securityContext: {}
+-# capabilities:
+-#   drop:
+-#   - ALL
+-# readOnlyRootFilesystem: true
+-# runAsNonRoot: true
+-# runAsUser: 1000
+securityContext:
+capabilities:
+  drop:
+    - ALL
+
+readOnlyRootFilesystem: true
+runAsNonRoot: true
+runAsUser: 1000
+ 
+ service:
+   type: ClusterIP
--- a/examples/patches/git/patch.diff
+++ b/examples/patches/git/patch.diff
@@ -0,0 +1,13 @@
+diff --git a/Chart.yaml b/Chart.yaml
+index d8995d5..0e5f5a5 100644
+--- a/Chart.yaml
+++ b/Chart.yaml
+@@ -8,7 +8,7 @@ keywords:
+ - bitwarden
+ - bitwarden_rs
+ maintainers:
+-- email: allanger@badhouseplants.net
+- email: Somebody else
+   name: Nikolai Rodionov
+   url: https://badhouseplants.net
+ name: vaultwarden
--- a/examples/patches/regexp/patch.yaml
+++ b/examples/patches/regexp/patch.yaml
@@ -0,0 +1,7 @@
+---
+name: Add spaces before comments
+targets:
+  - values.yaml
+before: |-
+  ^.*[\S]+.*#
+after: " #"
--- a/examples/yamlfmt.yml
+++ b/examples/yamlfmt.yml
@@ -0,0 +1 @@
+pad_line_comments: 2
--- a/helmule.yaml
+++ b/helmule.yaml
@@ -0,0 +1,97 @@
+# mirror charts
+repositories:
+  - name: metrics-server
+    helm:
+      url: https://kubernetes-sigs.github.io/metrics-server/
+  - name: db-operator
+    git:
+      url: https://github.com/db-operator/charts.git
+      ref: main
+      path: charts
+  - name: badhouseplants
+    helm:
+      url: https://badhouseplants.github.io/helm-charts/
+  - name: flux-community
+    helm:
+      url: https://fluxcd-community.github.io/helm-charts
+charts:
+  - name: vaultwarden
+    repository: badhouseplants
+    version: latest
+    extensions:
+      - name: Add virtual service to the chartc
+        target_dir: templates/extensions
+        source_dir: ./examples/extensions/vaultwarden
+    patches:
+      - name: Git patch 1
+        git:
+          path: ./examples/patches/git/patch.diff
+      - name: Git patch 2
+        git:
+          path: ./examples/patches/git/patch-2.diff
+      - name: yaml-fmt
+        custom_command:
+          commands:
+            - |-
+              cat <<EOT >> .yamlfmt
+                formatter:
+                  pad_line_comments: 2
+              EOT
+            - yamlfmt values.yaml --conf ./yamlfmt.yaml
+            - rm -f yamlfmt.yaml
+    mirrors:
+      - badhouseplants-git
+      - custom-command
+  - name: flux2
+    repository: flux-community
+    extensions:
+      - name: Create a job that will apply crds
+        target_dir: templates/crd-install
+        source_dir: ./examples/extensions/flux2
+    patches:
+      - name: Add crds to chart files
+        custom_command:
+          commands:
+            - mkdir crd-base
+            - |-
+              cd crd-base && helm template flux . \
+                | yq '. | select(.kind == "CustomResourceDefinition")' \
+                | yq -s '.kind + "-" + .metadata.name'
+      - name: Remove CRDs from the templates
+        custom_command:
+          commands:
+            - find . -name "*crds*" -type f -delete
+      - name: Remove installCRDs value from the default values
+        regexp:
+          path: ./examples/patches/flux-regexp
+      - name: yaml-fmt
+        custom_command:
+          commands:
+            - |-
+              cat <<EOT >> .yamlfmt
+                formatter:
+                  pad_line_comments: 2
+              EOT
+            - yamlfmt values.yaml --conf ./yamlfmt.yaml
+            - rm -f yamlfmt.yaml
+    mirrors:
+      - custom-command
+mirrors:
+  - name: badhouseplants-git
+    git:
+      url: git@git.badhouseplants.net:allanger/helmuled-charts.git
+      branch: upgrade-{{ name }}-to-{{ version }}
+      path: charts/{{ name }}
+      commit: |-
+        chore: mirror {{ name }}-{{ version }}
+
+        upstream_repo: {{ repo_url }}
+  - name: custom-command
+    custom_command:
+      package:
+        - zip -r {{ name }}-{{ version }}.zip {{ name }}-{{ version }}
+      upload:
+        - rm -f /tmp/{{ name }}-{{ version }}.zip
+        - rm -rf /tmp/{{ name }}-{{ version }}
+        - cp {{ name }}-{{ version }}.zip /tmp
+        - unzip /tmp/{{ name }}-{{ version }}.zip -d /tmp/{{ name }}-{{ version}}
--- a/src/config/extension.rs
+++ b/src/config/extension.rs
@@ -0,0 +1,45 @@
+use std::{fs, path::Path};
+
+use log::info;
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
+pub(crate) struct Extension {
+    name: Option<String>,
+    target_dir: String,
+    source_dir: String,
+}
+
+impl Extension {
+    pub(crate) fn apply(&self, chart_local_path: String) -> Result<(), Box<dyn std::error::Error>> {
+        let extension_name = match self.name.clone() {
+            Some(res) => res,
+            None => "Unnamed".to_string(),
+        };
+        info!("applying extension: '{}'", extension_name);
+        let target_dir = format!("{}/{}", chart_local_path, self.target_dir);
+        info!("trying to create a dir: {}", target_dir);
+        fs::create_dir(target_dir.clone())?;
+        info!("copying {} to {}", self.source_dir, target_dir);
+        copy_recursively(self.source_dir.clone(), target_dir)?;
+        Ok(())
+    }
+}
+
+/// Copy files from source to destination recursively.
+pub fn copy_recursively(
+    source: impl AsRef<Path>,
+    destination: impl AsRef<Path>,
+) -> Result<(), Box<dyn std::error::Error>> {
+    for entry in fs::read_dir(source)? {
+        let entry = entry?;
+        let filetype = entry.file_type()?;
+        if filetype.is_dir() {
+            copy_recursively(entry.path(), destination.as_ref().join(entry.file_name()))?;
+        } else {
+            info!("trying to copy {:?}", entry.path());
+            fs::copy(entry.path(), destination.as_ref().join(entry.file_name()))?;
+        }
+    }
+    Ok(())
+}
--- a/src/config/mod.rs
+++ b/src/config/mod.rs
@@ -0,0 +1,184 @@
+use log::{info, warn};
+use serde::{Deserialize, Serialize};
+use std::fs::File;
+
+pub(crate) mod extension;
+pub(crate) mod patch;
+
+#[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
+pub(crate) struct Config {
+    pub(crate) repositories: Vec<Repository>,
+    pub(crate) charts: Vec<Chart>,
+    pub(crate) mirrors: Vec<Mirror>,
+}
+
+impl Config {
+    pub(crate) fn new(config_path: String) -> Result<Self, Box<dyn std::error::Error>> {
+        info!("reading the config file");
+        let config_content = File::open(config_path)?;
+        let config: Config = serde_yaml::from_reader(config_content)?;
+        Ok(config)
+    }
+}
+
+pub(crate) enum RepositoryKind {
+    Helm,
+    Git,
+}
+
+#[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
+pub(crate) struct Repository {
+    // A name of the repository to be references by charts
+    pub(crate) name: String,
+    // Helm repository data
+    pub(crate) helm: Option<Helm>,
+    pub(crate) git: Option<Git>,
+}
+
+#[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
+pub(crate) struct Mirror {
+    pub(crate) name: String,
+    pub(crate) git: Option<GitMirror>,
+    pub(crate) custom_command: Option<CustomCommandsMirror>,
+}
+
+#[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
+pub(crate) struct CustomCommandsMirror {
+    pub(crate) package: Vec<String>,
+    pub(crate) upload: Vec<String>,
+}
+
+#[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
+pub(crate) struct GitMirror {
+    pub(crate) url: String,
+    pub(crate) path: Option<String>,
+    pub(crate) branch: String,
+    pub(crate) commit: Option<String>,
+}
+
+#[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
+pub(crate) struct Helm {
+    // A url of the helm repository
+    pub(crate) url: String,
+}
+
+#[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
+pub(crate) struct Git {
+    pub(crate) url: String,
+    #[serde(alias = "ref")]
+    pub(crate) git_ref: String,
+    pub(crate) path: String,
+}
+
+#[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
+pub(crate) struct Chart {
+    // A name of the helm chart
+    pub(crate) name: String,
+    // A reference to repository by name
+    pub(crate) repository: String,
+    pub(crate) mirrors: Vec<String>,
+    // Versions to be mirrored
+    pub(crate) version: Option<String>,
+    // A repository object
+    pub(crate) extensions: Option<Vec<extension::Extension>>,
+    pub(crate) patches: Option<Vec<patch::Patch>>,
+    #[serde(skip_serializing)]
+    pub(crate) repository_obj: Option<Repository>,
+    #[serde(skip_serializing)]
+    pub(crate) mirror_objs: Option<Vec<Mirror>>,
+}
+
+impl Chart {
+    pub(crate) fn populate_repository(
+        &mut self,
+        repositories: Vec<Repository>,
+    ) -> Result<(), Box<dyn std::error::Error>> {
+        for repository in repositories {
+            if repository.name == self.repository {
+                self.repository_obj = Some(repository);
+                return Ok(());
+            }
+        }
+        //let err = error!("repo {} is not found in the repo list", self.repository);
+        let error_msg = format!("repo {} is not found in the repo list", self.repository);
+        return Err(Box::from(error_msg));
+    }
+    // TODO: Handle the "mirror not found" error
+    pub(crate) fn populate_mirrors(
+        &mut self,
+        mirrors: Vec<Mirror>,
+    ) -> Result<(), Box<dyn std::error::Error>> {
+        let mut mirror_objs: Vec<Mirror> = vec![];
+
+        for mirror_global in mirrors.clone() {
+            for mirror_name in self.mirrors.clone() {
+                if mirror_name == mirror_global.name.clone() {
+                    mirror_objs.push(mirror_global.clone());
+                }
+            }
+        }
+        if mirror_objs.len() > 0 {
+            self.mirror_objs = Some(mirror_objs);
+        }
+        Ok(())
+    }
+
+    pub(crate) fn get_helm_repository_url(&self) -> String {
+        match self.repository_obj.clone() {
+            Some(res) => res.helm.unwrap().url,
+            None => {
+                warn!("repository object is not filled for chart {}", self.name);
+                return "".to_string();
+            }
+        }
+    }
+
+    pub(crate) fn get_git_repository_url(&self) -> String {
+        match self.repository_obj.clone() {
+            Some(res) => res.git.unwrap().url,
+            None => {
+                warn!("repository object is not filled for chart {}", self.name);
+                return "".to_string();
+            }
+        }
+    }
+
+    pub(crate) fn get_git_repository_ref(&self) -> String {
+        match self.repository_obj.clone() {
+            Some(res) => res.git.unwrap().git_ref,
+            None => {
+                warn!("repository object is not filled for chart {}", self.name);
+                return "".to_string();
+            }
+        }
+    }
+
+    pub(crate) fn get_git_repository_path(&self) -> String {
+        match self.repository_obj.clone() {
+            Some(res) => res.git.unwrap().path,
+            None => {
+                warn!("repository object is not filled for chart {}", self.name);
+                return "".to_string();
+            }
+        }
+    }
+
+    pub(crate) fn get_repo_kind(&self) -> Result<RepositoryKind, Box<dyn std::error::Error>> {
+        match &self.repository_obj {
+            Some(res) => {
+                if res.helm.is_some() {
+                    return Ok(RepositoryKind::Helm);
+                } else if res.git.is_some() {
+                    return Ok(RepositoryKind::Git);
+                } else {
+                    return Err(Box::from("unknown repository kind is found"));
+                }
+            }
+            None => {
+                return Err(Box::from(
+                    "repository object is not filled up for the chart",
+                ));
+            }
+        }
+    }
+}
--- a/src/config/patch.rs
+++ b/src/config/patch.rs
@@ -0,0 +1,200 @@
+use std::{
+    fs::{self, read_dir, remove_dir_all, File, OpenOptions},
+    io::Write,
+    path::{Path, PathBuf},
+};
+
+use log::{error, info};
+use serde::{Deserialize, Serialize};
+
+use crate::helpers::cli::{cli_exec, cli_exec_from_dir};
+
+#[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
+pub(crate) struct RegexpPatch {
+    pub(crate) path: String,
+}
+
+#[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
+pub(crate) struct GitPatch {
+    path: String,
+}
+
+#[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
+pub(crate) enum YqOperations {
+    Add,
+    Delete,
+    Replace,
+}
+
+#[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
+pub(crate) struct YqPatch {
+    file: String,
+    op: YqOperations,
+    key: String,
+    value: Option<String>,
+}
+
+#[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
+pub(crate) struct CustomCommandPatch {
+    commands: Vec<String>,
+}
+
+#[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
+pub(crate) struct Patch {
+    regexp: Option<RegexpPatch>,
+    git: Option<GitPatch>,
+    custom_command: Option<CustomCommandPatch>,
+    yq: Option<YqPatch>,
+}
+
+impl Patch {
+    pub(crate) fn apply(&self, chart_local_path: String) -> Result<(), Box<dyn std::error::Error>> {
+        let patch_action = patch_action_from_definition(self.clone())?;
+        patch_action.apply(chart_local_path)
+    }
+}
+
+trait PatchInterface {
+    fn apply(&self, chart_local_path: String) -> Result<(), Box<dyn std::error::Error>>;
+}
+
+impl PatchInterface for YqPatch {
+    fn apply(&self, chart_local_path: String) -> Result<(), Box<dyn std::error::Error>> {
+        let cmd = match self.op {
+            YqOperations::Add => format!(
+                "yq -i '{} += \"{}\"' {}",
+                self.key,
+                self.value.clone().unwrap(),
+                self.file
+            ),
+            YqOperations::Delete => format!("yq -i \'del({})\' {}", self.key, self.file),
+            YqOperations::Replace => format!(
+                "yq e -i \'{} = \"{}\"\' {}",
+                self.key,
+                self.value.clone().unwrap(),
+                self.file
+            ),
+        };
+        cli_exec_from_dir(cmd, chart_local_path)?;
+        Ok(())
+    }
+}
+
+impl PatchInterface for RegexpPatch {
+    fn apply(&self, chart_local_path: String) -> Result<(), Box<dyn std::error::Error>> {
+        for entry in read_dir(self.path.clone())? {
+            let entry = entry?;
+            let filetype = entry.file_type()?;
+            if filetype.is_dir() {
+                error!(
+                    "reading dirs is not supported yet, skipping {:?}",
+                    entry.path()
+                );
+            } else {
+                info!("reading a patch file: {:?}", entry.path());
+                let config_content = File::open(entry.path())?;
+                for patch_des in serde_yaml::Deserializer::from_reader(config_content) {
+                    let patch: crate::patch::regexp::RegexpPatch =
+                        match crate::patch::regexp::RegexpPatch::deserialize(patch_des) {
+                            Ok(patch) => patch,
+                            Err(err) => return Err(Box::from(err)),
+                        };
+                    info!("applying patch: {}", patch.name);
+                    let after = match patch.after {
+                        Some(after) => after,
+                        None => "".to_string(),
+                    };
+                    match patch.before {
+                        Some(before) => {
+                            let patch_regexp = regex::Regex::new(before.as_str())?;
+                            for target in patch.targets {
+                                let file_path = format!("{}/{}", chart_local_path, target);
+                                let file_content = fs::read_to_string(file_path.clone())?;
+                                let new_content =
+                                    patch_regexp.replace_all(file_content.as_str(), after.clone());
+                                let mut file = OpenOptions::new()
+                                    .write(true)
+                                    .truncate(true)
+                                    .open(file_path.clone())?;
+                                file.write(new_content.as_bytes())?;
+                            }
+                        }
+                        None => {
+                            for target in patch.targets {
+                                let file_path = format!("{}/{}", chart_local_path, target);
+                                let file_content = fs::read_to_string(file_path.clone())?;
+                                let new_content = format!("{}\n{}", file_content, after);
+                                let mut file = OpenOptions::new()
+                                    .write(true)
+                                    .append(false)
+                                    .open(file_path.clone())?;
+                                file.write(new_content.as_bytes())?;
+                            }
+                        }
+                    };
+                }
+            }
+        }
+        Ok(())
+    }
+}
+
+impl PatchInterface for GitPatch {
+    fn apply(&self, chart_local_path: String) -> Result<(), Box<dyn std::error::Error>> {
+        if !is_git_repo(chart_local_path.clone()) {
+            init_git_repo(chart_local_path.clone())?;
+        };
+        let cmd = format!("git -C {} apply {}", chart_local_path, self.path);
+        cli_exec(cmd)?;
+        remove_dir_all(chart_local_path + "/.git")?;
+        Ok(())
+    }
+}
+
+impl PatchInterface for CustomCommandPatch {
+    fn apply(&self, chart_local_path: String) -> Result<(), Box<dyn std::error::Error>> {
+        for cmd in self.commands.clone() {
+            cli_exec_from_dir(cmd, chart_local_path.clone())?;
+        }
+        Ok(())
+    }
+}
+
+fn patch_action_from_definition(
+    patch: Patch,
+) -> Result<Box<dyn PatchInterface>, Box<dyn std::error::Error>> {
+    if let Some(regexp) = patch.regexp {
+        return Ok(Box::new(RegexpPatch { path: regexp.path }));
+    } else if let Some(git) = patch.git {
+        return Ok(Box::new(GitPatch {
+            path: {
+                let path = PathBuf::from(git.path);
+                let can_path = fs::canonicalize(&path).ok().unwrap();
+                can_path.into_os_string().into_string().ok().unwrap()
+            },
+        }));
+    } else if let Some(custom_command) = patch.custom_command {
+        return Ok(Box::new(CustomCommandPatch {
+            commands: custom_command.commands,
+        }));
+    } else if let Some(yq) = patch.yq {
+        if yq.op != YqOperations::Delete && yq.value.is_none() {
+            return Err(Box::from("yq patch of non kind 'delete' requires a value"));
+        };
+        return Ok(Box::from(yq));
+    } else {
+        return Err(Box::from("unknown patch type"));
+    };
+}
+
+fn is_git_repo(path: String) -> bool {
+    let dot_git_path = path + ".git";
+    Path::new(dot_git_path.as_str()).exists()
+}
+
+pub(crate) fn init_git_repo(path: String) -> Result<(), Box<dyn std::error::Error>> {
+    cli_exec(format!("git -C {} init .", path))?;
+    cli_exec(format!("git -C {} add .", path))?;
+    cli_exec(format!("git -C {} commit -m 'Init commit'", path))?;
+    Ok(())
+}
--- a/src/helpers/cli.rs
+++ b/src/helpers/cli.rs
@@ -0,0 +1,66 @@
+use std::process::{Command, ExitStatus};
+
+use log::info;
+
+pub(crate) fn cli_exec(command: String) -> Result<String, Box<dyn std::error::Error>> {
+    info!("executing: {}", command);
+    let expect = format!("command has failed: {}", command);
+    let output = Command::new("sh")
+        .arg("-c")
+        .arg(command)
+        .output()
+        .expect(&expect);
+    let stderr = String::from_utf8_lossy(&output.stderr);
+    if !&output.status.success() {
+        return Err(Box::from(stderr));
+    };
+    Ok(String::from_utf8_lossy(&output.stdout).to_string())
+}
+
+pub(crate) fn cli_exec_from_dir(
+    command: String,
+    dir: String,
+) -> Result<String, Box<dyn std::error::Error>> {
+    info!("executing: {}", command);
+    let expect = format!("command has failed: {}", command);
+    let output = Command::new("sh")
+        .arg("-c")
+        .current_dir(dir)
+        .arg(command)
+        .output()
+        .expect(&expect);
+    let stderr = String::from_utf8_lossy(&output.stderr);
+    if !&output.status.success() {
+        return Err(Box::from(stderr));
+    };
+    let mut stdout = String::from_utf8_lossy(&output.stdout).to_string();
+    stdout.pop();
+    Ok(stdout)
+}
+#[cfg(test)]
+mod tests {
+    use crate::helpers::cli::{cli_exec, cli_exec_from_dir};
+
+    #[test]
+    fn test_stderr() {
+        let command = ">&2 echo \"error\" && exit 1";
+        let test = cli_exec(command.to_string());
+        assert_eq!(test.err().unwrap().to_string(), "error\n".to_string());
+    }
+
+    #[test]
+    fn test_stdout() {
+        let command = "echo test";
+        let test = cli_exec(command.to_string());
+        assert_eq!(test.unwrap().to_string(), "test\n".to_string());
+    }
+
+    #[test]
+    fn test_stdout_current_dir() {
+        let dir = tempfile::tempdir().unwrap();
+        let command = "echo $PWD";
+        let dir_str = dir.into_path().into_os_string().into_string().unwrap();
+        let test = cli_exec_from_dir(command.to_string(), dir_str.clone());
+        assert!(test.unwrap().to_string().contains(dir_str.as_str()));
+    }
+}
--- a/src/helpers/copy.rs
+++ b/src/helpers/copy.rs
@@ -0,0 +1,21 @@
+use std::{fs, path::Path};
+
+use log::info;
+
+/// Copy files from source to destination recursively.
+pub(crate) fn copy_recursively(
+    source: impl AsRef<Path>,
+    destination: impl AsRef<Path>,
+) -> Result<(), Box<dyn std::error::Error>> {
+    for entry in fs::read_dir(source)? {
+        let entry = entry?;
+        let filetype = entry.file_type()?;
+        if filetype.is_dir() {
+            copy_recursively(entry.path(), destination.as_ref().join(entry.file_name()))?;
+        } else {
+            info!("trying to copy {:?}", entry.path());
+            fs::copy(entry.path(), destination.as_ref().join(entry.file_name()))?;
+        }
+    }
+    Ok(())
+}
--- a/src/helpers/mod.rs
+++ b/src/helpers/mod.rs
@@ -0,0 +1,2 @@
+pub(crate) mod cli;
+pub(crate) mod copy;
--- a/src/main.rs
+++ b/src/main.rs
@@ -0,0 +1,180 @@
+pub(crate) mod config;
+pub(crate) mod helpers;
+pub(crate) mod mirror;
+pub(crate) mod patch;
+pub(crate) mod source;
+
+use clap::Parser;
+use log::{error, info};
+use std::fs;
+use std::{fs::create_dir, path::PathBuf, process::exit};
+use tempfile::TempDir;
+
+use crate::config::patch::init_git_repo;
+
+/// Simple program to greet a person
+#[derive(Parser, Debug)]
+#[command(author, version, about, long_about = None)]
+struct Args {
+    /// Name of the working dir
+    #[arg(short, long)]
+    workdir: Option<String>,
+    /// Path to the configuration file
+    #[arg(short, long)]
+    config: String,
+    /// Dry run
+    #[arg(short, long, default_value = "false")]
+    dry_run: bool,
+    /// Init git patch. Use it if you want to create git patch for a chart
+    /// It's going to pull a chart and init a git repo there, so you can
+    /// apply changes and create a patch file
+    /// It's not going to try mirroring changes, but will apply extensions
+    /// and patches that are already defined
+    #[arg(long)]
+    init_git_patch: Option<Vec<String>>,
+}
+
+fn main() {
+    env_logger::init();
+    let args = Args::parse();
+    // Prepare the workdir
+    let workdir_path = match args.workdir {
+        Some(res) => match create_dir(res.clone()) {
+            Ok(_) => {
+                let path = PathBuf::from(res);
+                let can_path = fs::canonicalize(&path).ok().unwrap();
+                can_path.into_os_string().into_string().ok().unwrap()
+            }
+            Err(err) => {
+                error!("{}", err);
+                exit(1);
+            }
+        },
+        None => {
+            let tmp_dir = match TempDir::new() {
+                Ok(res) => res,
+                Err(err) => {
+                    error!("{}", err);
+                    exit(1);
+                }
+            };
+            match tmp_dir.path().to_str() {
+                Some(res) => res.to_string(),
+                None => {
+                    exit(1);
+                }
+            }
+        }
+    };
+
+    // Read the config
+    let config = match config::Config::new(args.config) {
+        Ok(res) => res,
+        Err(err) => {
+            error!("{}", err);
+            exit(1);
+        }
+    };
+
+    for mut chart in config.clone().charts {
+        match chart.populate_repository(config.repositories.clone()) {
+            Ok(_) => {
+                info!("repo is populated for chart {}", chart.name);
+            }
+            Err(err) => {
+                error!("{}", err);
+                exit(1);
+            }
+        }
+        match chart.populate_mirrors(config.mirrors.clone()) {
+            Ok(_) => {
+                info!("mirrors arepopulated for chart {}", chart.name)
+            }
+            Err(err) => {
+                error!("{}", err);
+                exit(1);
+            }
+        }
+        let chart_repo = match source::repo_from_chart(chart.clone()) {
+            Ok(res) => res,
+            Err(err) => {
+                error!("{}", err);
+                exit(1);
+            }
+        };
+        match chart_repo.pull(workdir_path.clone()) {
+            Ok(res) => {
+                info!(
+                    "succesfully pulled chart {} into {}",
+                    chart.name.clone(),
+                    res.path,
+                );
+                if let Some(extensions) = chart.extensions.clone() {
+                    for extension in extensions {
+                        if let Err(err) = extension.apply(res.clone().path) {
+                            error!("{}", err);
+                            exit(1);
+                        }
+                    }
+                }
+                if let Some(patches) = chart.patches.clone() {
+                    for patch in patches {
+                        if let Err(err) = patch.apply(res.clone().path) {
+                            error!("{}", err);
+                            exit(1);
+                        }
+                    }
+                }
+                if let Some(init_git_patch) = args.init_git_patch.clone() {
+                    if init_git_patch.contains(&chart.name) {
+                        info!(
+                            "init git patch mode is enabled, go to {} to make your changes",
+                            res.path
+                        );
+                        match init_git_repo(res.path) {
+                            Ok(_) => {
+                                info!("not mirroring, because of the init git patch mode");
+                            }
+                            Err(err) => {
+                                error!("{}", err);
+                                exit(1);
+                            }
+                        };
+                        break;
+                    }
+                }
+                if let Some(mirrors) = chart.mirror_objs.clone() {
+                    for mirror_obj in mirrors {
+                        match mirror::mirror_from_mirror_obj(mirror_obj.clone()) {
+                            Ok(mirror) => {
+                                match mirror.push(workdir_path.clone(), res.clone(), args.dry_run) {
+                                    Ok(_) => info!(
+                                        "mirrored {} to {}",
+                                        chart.name.clone(),
+                                        mirror_obj.name
+                                    ),
+                                    Err(err) => {
+                                        error!("{}", err);
+                                        exit(1);
+                                    }
+                                };
+                            }
+                            Err(err) => {
+                                error!("{}", err);
+                                exit(1);
+                            }
+                        }
+                    }
+                }
+            }
+            Err(err) => {
+                error!("{}", err);
+                exit(1);
+            }
+        }
+    }
+
+    // Populate charts
+    // Download helm charts from config
+    // If workdir is not provided, create a temporary di
+}
--- a/src/mirror/custom_command.rs
+++ b/src/mirror/custom_command.rs
@@ -0,0 +1,33 @@
+use crate::helpers::cli::cli_exec_from_dir;
+
+use super::Target;
+
+pub(crate) struct CustomCommands {
+    pub(crate) package: Vec<String>,
+    pub(crate) upload: Vec<String>,
+}
+
+impl Target for CustomCommands {
+    fn push(
+        &self,
+        workdir_path: String,
+        chart_local: crate::source::ChartLocal,
+        dry_run: bool,
+    ) -> Result<(), Box<dyn std::error::Error>> {
+        for cmd_tmpl in self.package.clone() {
+            let mut reg = super::register_handlebars();
+            reg.register_template_string("cmd", cmd_tmpl)?;
+            let cmd = reg.render("cmd", &chart_local)?;
+            cli_exec_from_dir(cmd, workdir_path.clone())?;
+        }
+        if !dry_run {
+            for cmd_tmpl in self.upload.clone() {
+                let mut reg = super::register_handlebars();
+                reg.register_template_string("cmd", cmd_tmpl)?;
+                let cmd = reg.render("cmd", &chart_local)?;
+                cli_exec_from_dir(cmd, workdir_path.clone())?;
+            }
+        }
+        Ok(())
+    }
+}
--- a/src/mirror/git.rs
+++ b/src/mirror/git.rs
@@ -0,0 +1,60 @@
+use crate::{helpers::cli::cli_exec_from_dir, source::ChartLocal};
+use dircpy::*;
+
+use super::Target;
+
+pub(crate) struct Git {
+    pub(crate) git_dir: String,
+    pub(crate) url: String,
+    pub(crate) path: String,
+    pub(crate) branch: String,
+    pub(crate) commit: Option<String>,
+}
+
+impl Target for Git {
+    fn push(
+        &self,
+        workdir_path: String,
+        chart_local: ChartLocal,
+        dry_run: bool,
+    ) -> Result<(), Box<dyn std::error::Error>> {
+        let cmd = format!("git clone {} {}", self.url, self.git_dir);
+        cli_exec_from_dir(cmd, workdir_path.clone())?;
+        let git_repo_path = format!("{}/{}", workdir_path, self.git_dir);
+
+        // Prepare branch
+        let mut reg = super::register_handlebars();
+        reg.register_template_string("branch", self.branch.clone())?;
+        let branch = reg.render("branch", &chart_local)?;
+        let cmd = format!("git checkout {}", branch);
+        if let Err(_) = cli_exec_from_dir(cmd, git_repo_path.clone()) {
+            let cmd = format!("git checkout -b {}", branch);
+            cli_exec_from_dir(cmd, git_repo_path.clone())?;
+        };
+        // Prepare path
+        reg.register_template_string("path", self.path.clone())?;
+        let path = reg.render("path", &chart_local)?;
+        let repo_local_full_path = format!("{}/{}", git_repo_path, path);
+        CopyBuilder::new(chart_local.path.clone(), repo_local_full_path.clone())
+            .overwrite_if_size_differs(true)
+            .run()?;
+
+        // Prepare the commit message
+        let commit_message = match self.commit.clone() {
+            Some(commit) => commit,
+            None => "helmuled {{ name }}-{{ version }}".to_string(),
+        };
+        reg.register_template_string("commit", commit_message.clone())?;
+        let commit = reg.render("commit", &chart_local)?;
+        let cmd = format!(
+            "git add . && git diff --staged --quiet || git commit -m '{}'",
+            commit
+        );
+        cli_exec_from_dir(cmd, repo_local_full_path.clone())?;
+        if !dry_run {
+            let cmd = format!("git push --set-upstream origin {}", branch);
+            cli_exec_from_dir(cmd, repo_local_full_path)?;
+        }
+        Ok(())
+    }
+}
--- a/src/mirror/mod.rs
+++ b/src/mirror/mod.rs
@@ -0,0 +1,53 @@
+use chrono::prelude::*;
+use handlebars::{handlebars_helper, Handlebars};
+use time::{format_description::parse, OffsetDateTime};
+
+use crate::{config::Mirror, source::ChartLocal};
+
+pub(crate) mod custom_command;
+pub(crate) mod git;
+
+pub(crate) trait Target {
+    fn push(
+        &self,
+        workdir_path: String,
+        chart_local: ChartLocal,
+        dry_run: bool,
+    ) -> Result<(), Box<dyn std::error::Error>>;
+}
+
+pub(crate) fn mirror_from_mirror_obj(
+    mirror: Mirror,
+) -> Result<Box<dyn Target>, Box<dyn std::error::Error>> {
+    if let Some(git) = mirror.git {
+        return Ok(Box::from(git::Git {
+            git_dir: mirror.name.clone(),
+            url: git.url,
+            path: match git.path {
+                Some(path) => path,
+                None => "".to_string(),
+            },
+            branch: git.branch,
+            commit: git.commit,
+        }));
+    } else if let Some(command) = mirror.custom_command {
+        return Ok(Box::from(custom_command::CustomCommands {
+            package: command.package,
+            upload: command.upload,
+        }));
+    }
+    Err(Box::from(format!(
+        "a kind is unknown for the mirror {}",
+        mirror.name
+    )))
+}
+
+handlebars_helper!(date_helper: | | Utc::now().format("%Y-%m-%d").to_string());
+handlebars_helper!(time_helper: | | Utc::now().format("%H-%M-%S").to_string());
+
+pub(crate) fn register_handlebars() -> Handlebars<'static> {
+    let mut handlebars = Handlebars::new();
+    handlebars.register_helper("date", Box::new(date_helper));
+    handlebars.register_helper("time", Box::new(time_helper));
+    handlebars
+}
--- a/src/patch/mod.rs
+++ b/src/patch/mod.rs
@@ -0,0 +1 @@
+pub(crate) mod regexp;
--- a/src/patch/regexp.rs
+++ b/src/patch/regexp.rs
@@ -0,0 +1,9 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
+pub(crate) struct RegexpPatch {
+    pub(crate) name: String,
+    pub(crate) targets: Vec<String>,
+    pub(crate) before: Option<String>,
+    pub(crate) after: Option<String>,
+}
--- a/src/source/git.rs
+++ b/src/source/git.rs
@@ -0,0 +1,69 @@
+use std::fs::{self, rename};
+
+use crate::helpers::cli::{cli_exec, cli_exec_from_dir};
+use base64::{engine::general_purpose, Engine as _};
+
+use super::{ChartLocal, Repo};
+
+pub(crate) struct Git {
+    git_url: String,
+    git_ref: String,
+    path: String,
+    pub(crate) chart: String,
+}
+
+impl From<crate::config::Chart> for Git {
+    fn from(value: crate::config::Chart) -> Self {
+        Git {
+            git_url: value.get_git_repository_url(),
+            git_ref: value.get_git_repository_ref(),
+            path: value.get_git_repository_path(),
+            chart: value.name,
+        }
+    }
+}
+
+impl Repo for Git {
+    fn pull(&self, workdir_path: String) -> Result<ChartLocal, Box<dyn std::error::Error>> {
+        let repo_local_name = general_purpose::STANDARD_NO_PAD.encode(self.git_url.clone());
+        let cmd = format!(
+            "git clone {} {}/{}",
+            self.git_url, workdir_path, repo_local_name
+        );
+        cli_exec(cmd)?;
+
+        let cmd = format!(
+            "git -C {}/{} checkout {}",
+            workdir_path, repo_local_name, self.git_ref
+        );
+        cli_exec(cmd)?;
+
+        let old_dir_name = format!(
+            "{}/{}/{}/{}",
+            workdir_path, repo_local_name, self.path, self.chart
+        );
+        let cmd = format!("helm show chart {}", old_dir_name);
+        let helm_stdout = cli_exec(cmd)?;
+        let new_dir_name: String;
+        match serde_yaml::from_str::<super::Version>(&helm_stdout) {
+            Ok(res) => {
+                new_dir_name = format!("{}/{}-{}", workdir_path, self.chart, res.version);
+                rename(old_dir_name, new_dir_name.clone())?;
+            }
+            Err(err) => return Err(Box::from(err)),
+        };
+
+        // Cleaning up
+        fs::remove_dir_all(format!("{}/{}", workdir_path, repo_local_name))?;
+
+        // Get the version
+        let cmd = "helm show chart . | yq '.version'".to_string();
+        let version = cli_exec_from_dir(cmd, new_dir_name.clone())?;
+        Ok(ChartLocal {
+            name: self.chart.clone(),
+            version,
+            path: new_dir_name,
+            repo_url: self.git_url.clone(),
+        })
+    }
+}
--- a/src/source/helm.rs
+++ b/src/source/helm.rs
@@ -0,0 +1,105 @@
+use super::{ChartLocal, Repo};
+use crate::helpers::cli::{cli_exec, cli_exec_from_dir};
+use base64::{engine::general_purpose, Engine as _};
+use std::fs::rename;
+
+pub(crate) enum RepoKind {
+    Default,
+    Oci,
+}
+
+const LATEST_VERSION: &str = "latest";
+
+pub(crate) struct Helm {
+    pub(crate) chart: String,
+    pub(crate) repository_url: String,
+    pub(crate) version: String,
+}
+
+impl From<crate::config::Chart> for Helm {
+    fn from(value: crate::config::Chart) -> Self {
+        Helm {
+            chart: value.name.clone(),
+            repository_url: value.get_helm_repository_url(),
+            version: match value.version {
+                Some(res) => res,
+                None => LATEST_VERSION.to_string(),
+            },
+        }
+    }
+}
+
+impl Helm {
+    fn repo_kind_from_url(&self) -> Result<RepoKind, Box<dyn std::error::Error>> {
+        let prefix = self
+            .repository_url
+            .chars()
+            .take_while(|&ch| ch != ':')
+            .collect::<String>();
+        match prefix.as_str() {
+            "oci" => Ok(RepoKind::Oci),
+            "https" | "http" => Ok(RepoKind::Default),
+            _ => Err(Box::from(format!(
+                "repo kind is not defined by the prefix: {}",
+                prefix
+            ))),
+        }
+    }
+
+    fn pull_default(&self, workdir_path: String) -> Result<ChartLocal, Box<dyn std::error::Error>> {
+        // Add repo and update
+        let repo_local_name = general_purpose::STANDARD_NO_PAD.encode(self.repository_url.clone());
+        let cmd = format!("helm repo add {} {}", repo_local_name, self.repository_url);
+        cli_exec(cmd)?;
+        cli_exec("helm repo update".to_string())?;
+
+        let args = match self.version.as_str() {
+            LATEST_VERSION => "".to_string(),
+            _ => format!("--version {}", self.version.clone()),
+        };
+        let cmd = format!(
+            "helm pull {}/{} {} --destination {} --untar",
+            repo_local_name, &self.chart, args, workdir_path
+        );
+        cli_exec(cmd)?;
+
+        // Get the version
+        let cmd = format!("helm show chart {}/{}", workdir_path, &self.chart);
+        let helm_stdout = cli_exec(cmd)?;
+        let old_dir_name = format!("{}/{}", workdir_path, &self.chart);
+        let new_dir_name: String;
+        match serde_yaml::from_str::<super::Version>(&helm_stdout) {
+            Ok(res) => {
+                new_dir_name = format!("{}-{}", old_dir_name, res.version);
+                rename(old_dir_name, new_dir_name.clone())?;
+            }
+            Err(err) => return Err(Box::from(err)),
+        };
+
+        //cleaning up
+        let cmd = format!("helm repo remove {}", repo_local_name);
+        cli_exec(cmd)?;
+
+        let cmd = "helm show chart . | yq '.version'".to_string();
+        let version = cli_exec_from_dir(cmd, new_dir_name.clone())?;
+        Ok(ChartLocal {
+            name: self.chart.clone(),
+            version,
+            path: new_dir_name,
+            repo_url: self.repository_url.clone(),
+        })
+    }
+}
+
+impl Repo for Helm {
+    fn pull(&self, workdir_path: String) -> Result<ChartLocal, Box<dyn std::error::Error>> {
+        let repository_kind = self.repo_kind_from_url()?;
+        let path = match repository_kind {
+            RepoKind::Default => self.pull_default(workdir_path)?,
+            RepoKind::Oci => {
+                todo!()
+            }
+        };
+        Ok(path)
+    }
+}
--- a/src/source/mod.rs
+++ b/src/source/mod.rs
@@ -0,0 +1,46 @@
+use crate::config::Chart;
+use serde::{Deserialize, Serialize};
+
+pub(crate) mod git;
+pub(crate) mod helm;
+
+#[derive(Deserialize, Serialize, Clone)]
+pub(crate) struct ChartLocal {
+    pub(crate) name: String,
+    pub(crate) version: String,
+    pub(crate) path: String,
+    pub(crate) repo_url: String,
+}
+
+impl ChartLocal {
+    pub(crate) fn test(&self) -> String {
+        "test-me-if-you-can".to_string()
+    }
+}
+
+pub(crate) trait Repo {
+    fn pull(&self, workdir_path: String) -> Result<ChartLocal, Box<dyn std::error::Error>>;
+}
+
+#[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
+pub(crate) struct Version {
+    pub(crate) version: String,
+}
+
+pub(crate) fn repo_from_chart(chart: Chart) -> Result<Box<dyn Repo>, Box<dyn std::error::Error>> {
+    match chart.get_repo_kind() {
+        Ok(res) => {
+            return match res {
+                crate::config::RepositoryKind::Helm => {
+                    let helm: helm::Helm = chart.into();
+                    Ok(Box::new(helm))
+                }
+                crate::config::RepositoryKind::Git => {
+                    let git: git::Git = chart.into();
+                    Ok(Box::new(git))
+                }
+            }
+        }
+        Err(err) => return Err(Box::from(err)),
+    };
+}