mksnapshot

#!/bin/bash
[ "${1}z" = "z" ] && {
	echo "usage: $0 MAJOR.MINOR.MICRO"
	exit
}
git update-index --ignore-submodules --refresh &&
git diff-files --ignore-submodules --quiet &&
git diff-index --ignore-submodules --cached --quiet HEAD -- || {
	echo "can not lay new tag -- your working tree is not up-to-date"
	exit
}

tag=$1
git tag -l | grep $tag && {
	echo "can not lay tag -- it already exists."
	echo "run 'git tag -d version-$tag' to remove."
	exit
}

version=(${tag//./ })

COMMIT_FILES="ChangeLog"

# NOTE: Uses only first file that defines VERSION
PRO_FILE=$(grep -El "VERSION ?= ?[0-9]+\.[0-9]+\.[0-9]+$" *.pr[io]|head -n1)

[ "x$PRO_FILE" == "x" ] && {
	# No .pr[io] files set VERSION, assume automake and change configure.ac
	sed -i -e "s#_version_major, [^)]*)#_version_major, ${version[0]})#g" \
		-e "s#_version_minor, [^)]*)#_version_minor, ${version[1]})#g" \
		-e "s#_version_micro, [^)]*)#_version_micro, ${version[2]})#g" \
		configure.ac
	COMMIT_FILES="${COMMIT_FILES} configure.ac"
} || {
	# At least one .pro file exisits, modify VERSION tag in first .pro file
	# TODO: fix this to be smarter than just modifying first .pro file
	#       maybe looking for which one holds the VERSION tag?
	sed -i	-e "s#VERSION = .*#VERSION = ${tag}#g" $PRO_FILE
	COMMIT_FILES="${COMMIT_FILES} $PRO_FILE"
}

export $(grep -e "^PROJECT=\".*\"" makedist)
YAML_FILE="${PROJECT//\"/}.yaml"
[ "x$YAML_FILE" == "x" ] || {
        # modify Version tag in the .yaml file to match the version we're
        # tagging for this snapshot
        sed -i -e "s#Version: .*#Version: ${tag}#g" $YAML_FILE
	COMMIT_FILES="${COMMIT_FILES} $YAML_FILE"
}

echo -e "Changes in ${tag}\n" > ChangeLog.tmp &&
git log --pretty=oneline --abbrev=3 --abbrev-commit -r $(git describe --tags --abbrev=0).. >> ChangeLog.tmp &&
echo "" >> ChangeLog.tmp &&
cat ChangeLog >> ChangeLog.tmp &&
mv ChangeLog.tmp ChangeLog &&
git commit -s $COMMIT_FILES -m "Updated release files to version $tag" > /dev/null &&
git tag version-$tag && {
	echo "Version set to $tag and tag laid."
	echo "Make sure to 'git-push --tags' if you want to distribute."
} || {
	echo "Version update failed.  Reason unknown.  Try git-diff."
}