test: Start to migrate to docker's upstream tests

* Follow the upstream test suite's conventions.
* More migration to follow.

test/tests/docker-build.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+set -e
+
+# wrapper around "docker build" that creates a temporary directory and copies files into it first so that arbitrary host directories can be copied into containers without bind mounts, but accepts a Dockerfile on stdin
+
+# usage: ./docker-build.sh some-host-directory some-new-image:some-tag <<EOD
+#        FROM ...
+#        COPY dir/... /.../
+#        EOD
+#    ie: ./docker-build.sh .../hylang-hello-world librarytest/hylang <<EOD
+#        FROM hylang
+#        COPY dir/container.hy /dir/
+#        CMD ["hy", "/dir/container.hy"]
+#        EOD
+
+dir="$1"; shift
+[ -d "$dir" ]
+
+imageTag="$1"; shift
+
+tmp="$(mktemp -t -d docker-library-test-build-XXXXXXXXXX)"
+trap "rm -rf '$tmp'" EXIT
+
+cat > "$tmp/Dockerfile"
+
+from="$(awk -F '[ \t]+' 'toupper($1) == "FROM" { print $2; exit }' "$tmp/Dockerfile")"
+onbuilds="$(docker inspect -f '{{len .Config.OnBuild}}' "$from")"
+if [ "$onbuilds" -gt 0 ]; then
+	# crap, the image we want to build has some ONBUILD instructions
+	# those are kind of going to ruin our day
+	# let's do some hacks to strip those bad boys out in a new fake layer
+	"$(dirname "$(readlink -f "$BASH_SOURCE")")/remove-onbuild.sh" "$from" "$imageTag"
+	awk -F '[ \t]+' 'toupper($1) == "FROM" { $2 = "'"$imageTag"'" } { print }' "$tmp/Dockerfile" > "$tmp/Dockerfile.new"
+	mv "$tmp/Dockerfile.new" "$tmp/Dockerfile"
+fi
+
+cp -RL "$dir" "$tmp/dir"
+
+docker build -t "$imageTag" "$tmp" > /dev/null

test/tests/image-name.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+set -e
+
+# usage: ./image-name.sh librarytest/something some/image:some-tag
+# output: librarytest/something:some-image-some-tag
+
+base="$1"; shift
+tag="$1"; shift
+
+echo "$base:$(echo "$tag" | sed 's![:/]!-!g')"

test/tests/paranoid/container.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+set -e
+
+SERV_IP=$(ip -4 -o addr show scope global  | awk '{print $4}' | sed -e 's:/.*::' | head -n1)
+
+#
+# Generate a simple configuration, returns nonzero on error
+#
+ovpn_genconfig -u udp://$SERV_IP 2>/dev/null
+
+export EASYRSA_BATCH=1
+export EASYRSA_REQ_CN="Travis-CI Test CA"
+
+#
+# Initialize the certificate PKI state, returns nonzero on error
+#
+ovpn_initpki nopass 2>/dev/null
+
+#
+# Test back-up
+#
+ovpn_copy_server_files

test/tests/paranoid/run.sh

@@ -0,0 +1 @@
+../run-bash-in-container.sh

test/tests/run-bash-in-container.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+set -e
+
+testDir="$(readlink -f "$(dirname "$BASH_SOURCE")")"
+runDir="$(dirname "$(readlink -f "$BASH_SOURCE")")"
+
+source "$runDir/run-in-container.sh" "$testDir" "$1" bash ./container.sh

test/tests/run-in-container.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+set -e
+
+# NOT INTENDED TO BE USED AS A TEST "run.sh" DIRECTLY
+# SEE OTHER "run-*-in-container.sh" SCRIPTS FOR USAGE
+
+testDir="$1"
+shift
+
+image="$1"
+shift
+entrypoint="$1"
+shift
+
+# do some fancy footwork so that if testDir is /a/b/c, we mount /a/b and use c as the working directory (so relative symlinks work one level up)
+thisDir="$(dirname "$(readlink -f "$BASH_SOURCE")")"
+testDir="$(readlink -f "$testDir")"
+testBase="$(basename "$testDir")"
+hostMount="$(dirname "$testDir")"
+containerMount="/tmp/test-dir"
+workdir="$containerMount/$testBase"
+# TODO should we be doing something fancy with $BASH_SOURCE instead so we can be arbitrarily deep and mount the top level always?
+
+newImage="$("$thisDir/image-name.sh" librarytest/run-in-container "$image--$testBase")"
+"$thisDir/docker-build.sh" "$hostMount" "$newImage" <<EOD
+FROM $image
+COPY dir $containerMount
+WORKDIR $workdir
+ENTRYPOINT ["$entrypoint"]
+EOD
+
+args=( --rm )
+
+# there is strong potential for nokogiri+overlayfs failure
+# see https://github.com/docker-library/ruby/issues/55
+gemHome="$(docker inspect -f '{{range .Config.Env}}{{println .}}{{end}}' "$newImage" | awk -F '=' '$1 == "GEM_HOME" { print $2; exit }')"
+if [ "$gemHome" ]; then
+	# must be a Ruby image
+	driver="$(docker info | awk -F ': ' '$1 == "Storage Driver" { print $2; exit }')"
+	if [ "$driver" = 'overlay' ]; then
+		# let's add a volume (_not_ a bind mount) on GEM_HOME to work around nokogiri+overlayfs issues
+		args+=( -v "$gemHome" )
+	fi
+fi
+
+exec docker run "${args[@]}" "$newImage" "$@"