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opentelemetry-go/tag.sh

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#!/usr/bin/env bash
# Copyright The OpenTelemetry Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
readonly PROGNAME=$(basename "$0")
readonly PROGDIR=$(readlink -m "$(dirname "$0")")
readonly EXCLUDE_PACKAGES="internal/tools"
readonly SEMVER_REGEX="v(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)(\\-[0-9A-Za-z-]+(\\.[0-9A-Za-z-]+)*)?(\\+[0-9A-Za-z-]+(\\.[0-9A-Za-z-]+)*)?"
usage() {
cat <<- EOF
Usage: $PROGNAME [OPTIONS] SEMVER_TAG COMMIT_HASH
Creates git tag for all Go packages in project.
OPTIONS:
-h --help Show this help.
ARGUMENTS:
SEMVER_TAG Semantic version to tag with.
COMMIT_HASH Git commit hash to tag.
EOF
}
cmdline() {
local arg commit
for arg
do
local delim=""
case "$arg" in
# Translate long form options to short form.
--help) args="${args}-h ";;
# Pass through for everything else.
*) [[ "${arg:0:1}" == "-" ]] || delim="\""
args="${args}${delim}${arg}${delim} ";;
esac
done
# Reset and process short form options.
eval set -- "$args"
while getopts "h" OPTION
do
case $OPTION in
h)
usage
exit 0
;;
*)
echo "unknown option: $OPTION"
usage
exit 1
;;
esac
done
# Positional arguments.
shift $((OPTIND-1))
readonly TAG="$1"
if [ -z "$TAG" ]
then
echo "missing SEMVER_TAG"
usage
exit 1
fi
if [[ ! "$TAG" =~ $SEMVER_REGEX ]]
then
printf "invalid semantic version: %s\n" "$TAG"
exit 2
fi
if [[ "$( git tag --list "$TAG" )" ]]
then
printf "tag already exists: %s\n" "$TAG"
exit 2
fi
shift
commit="$1"
if [ -z "$commit" ]
then
echo "missing COMMIT_HASH"
usage
exit 1
fi
# Verify rev is for a commit and unify hashes into a complete SHA1.
readonly SHA="$( git rev-parse --quiet --verify "${commit}^{commit}" )"
if [ -z "$SHA" ]
then
printf "invalid commit hash: %s\n" "$commit"
exit 2
fi
if [ "$( git merge-base "$SHA" HEAD )" != "$SHA" ]
then
printf "commit '%s' not found on this branch\n" "$commit"
exit 2
fi
}
package_dirs() {
# Return a list of package directories in the form:
#
# package/directory/a
# package/directory/b
# deeper/package/directory/a
# ...
#
# Making sure to exclude any packages in the EXCLUDE_PACKAGES regexp.
find . -mindepth 2 -type f -name 'go.mod' -exec dirname {} \; \
| grep -E -v "$EXCLUDE_PACKAGES" \
| sed 's/^\.\///' \
| sort
}
git_tag() {
local tag="$1"
local commit="$2"
git tag -a "$tag" -s -m "Version $tag" "$commit"
}
previous_version() {
local current="$1"
# Requires git > 2.0
git tag -l --sort=v:refname \
| grep -E "^${SEMVER_REGEX}$" \
| grep -v "$current" \
| tail -1
}
print_changes() {
local tag="$1"
local previous
previous="$( previous_version "$tag" )"
if [ -n "$previous" ]
then
printf "\nRaw changes made between %s and %s\n" "$previous" "$tag"
printf "======================================\n"
git --no-pager log --pretty=oneline "${previous}..$tag"
fi
}
main() {
local dir
cmdline "$@"
cd "$PROGDIR" || exit 3
# Create tag for root package.
git_tag "$TAG" "$SHA"
printf "created tag: %s\n" "$TAG"
# Create tag for all sub-packages.
for dir in $( package_dirs )
do
git_tag "${dir}/$TAG" "$SHA"
printf "created tag: %s\n" "${dir}/$TAG"
done
print_changes "$TAG"
}
main "$@"