A couple of updates

Signed-off-by: Nikolai Rodionov <allanger@badhouseplants.net>

Taskfile.yml

@@ -2,6 +2,11 @@
 
 version: "3"
 
+vars:
+  LOCALBIN:
+    sh: echo "$(pwd)/bin"
+  MIGRATE: "{{.LOCALBIN}}/migrate"
+
 tasks:
   build:
     desc: Build go code
@@ -51,3 +56,49 @@ tasks:
       - go get gitea.badhouseplants.net/softplayer/softplayer-go-proto@$(git -C '{{ .WORKDIR }}' rev-parse HEAD)
       - rm -rf '{{ .WORKDIR }}'
       - go mod tidy
+
+  add-migration:
+    desc: Add a new database migration
+    silent: true
+    cmd: "{{.MIGRATE}} create -dir migrations -ext sql {{.CLI_ARGS}}"
+
+  # Install required tools
+  localbin:
+    desc: Create local bin directory
+    silent: true
+    cmds:
+      - mkdir -p "{{.LOCALBIN}}"
+
+  migrate:
+    desc: Download migrate if necessary
+    silent: true
+    deps:
+      - localbin
+    cmds:
+      - task: go-install-tool
+        vars:
+          TARGET: "{{.MIGRATE}}"
+          PACKAGE: github.com/golang-migrate/migrate/v4/cmd/migrate
+          VERSION: latest
+
+  go-install-tool:
+    internal: true
+    silent: true
+    cmd: |-
+      set -e
+      TARGET="{{.TARGET}}"
+      PACKAGE="{{.PACKAGE}}@{{.VERSION}}"
+      VERSIONED="${TARGET}-{{.VERSION}}"
+
+      if [ -f "$VERSIONED" ] && [ "$(readlink -- "$TARGET" 2>/dev/null)" = "$VERSIONED" ]; then
+        echo "$PACKAGE already installed"
+        exit 0
+      fi
+
+      echo "Downloading $PACKAGE"
+      rm -f "$TARGET"
+
+      GOBIN="{{.LOCALBIN}}" go install "$PACKAGE"
+
+      mv "{{.LOCALBIN}}/$(basename "$TARGET")" "$VERSIONED"
+      ln -sf "$(realpath "$VERSIONED")" "$TARGET"