prepare-branch: create the branch

prepare-branch.sh

@@ -1,12 +1,77 @@
 #!/bin/sh -e
 
+
+prepare() {
+	local branch="$1"
+	local dir=$(mktemp -d /tmp/docker-brew-alpine-XXXXXX)
+	docker build -t docker-brew-alpine-fetch .
+	docker run --user $(id -u) --rm -it -v $dir:/out docker-brew-alpine-fetch $branch /out
+	echo "=> Verifying checksums"
+	( cd $dir && sha512sum -c checksums.sha512)
+	echo "=> temp dir: $dir"
+	echo "=> To create git branch run:"
+	echo ""
+	echo "  $0 branch $branch $dir"
+	echo ""
+}
+
+branch() {
+	local branch="$1"
+	local dir="$2"
+	local version=$(cat $dir/VERSION)
+	echo "=> Creating branch for release $version from $dir"
+
+	if [ -n "$(git status --porcelain)" ]; then
+		echo "=> git status is not clean. Aborting"
+		git status --porcelain
+		exit 1
+	fi
+
+	git checkout master
+	git branch -D "$branch" || true
+	git checkout --orphan "$branch"
+	git rm --cached -r .
+	rm -fr ./*
+	mv "$dir"/* .
+	rmdir "$dir"
+	git add *
+	git commit -m "Update Alpine $branch - $version"
+
+	echo "=> Branch created:"
+	git log
+	echo ""
+	echo "=> To upload release do:"
+	echo ""
+	echo "  git push -f origin $branch"
+	echo ""
+}
+
+help() {
+	cat <<EOF
+Usage: $0 COMMAND [OPTS]
+
+Commands:
+
+ prepare [BRANCH]   - fetch release latest minirootfs to a temp directory and
+                      create Dockerfiles
+
+ branch BRANCH DIR  - update git branch with previously prepared temp
+                      directory
+
+EOF
+}
+
+cmd=$1
+shift
+
 branch=${1:-edge}
+dir="$2"
+
+case "$cmd" in
+	prepare) prepare "$branch";;
+	branch)  branch "$branch" "$dir";;
+	*) help $0;;
+esac
 
-dir=$(mktemp -d /tmp/docker-brew-alpine-XXXXXX)
-docker build -t docker-brew-alpine-fetch .
-docker run --user $(id -u) --rm -it -v $dir:/out docker-brew-alpine-fetch $branch /out
-( cd $dir && sha512sum -c checksums.sha512)
 
-echo "COMPLETED"
-echo "=> Temp dir: $dir"