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#!/bin/bash
# Peter Hyman, pete@peterhyman.com
# December 2020
# This program will return commit references based on Tags and Annotated Tags from git describe
usage() {
cat >&2 <<EOF
$(basename $0) command [-r]
all - entire git describe
commit - commit, omitting v
tagrev - tag revision count
major - major release version
ninor - minor release version
micro - micro release version
version - M.mic + [tag release count-HEAD commit]
-r -- get release tag only
EOF
exit 1
}
# showw message and usage
die() {
echo "$1"
usage
}
# return variables
# everything, with leading `v' and leading `g' for commits
describe_tag=
# abbreviated commit
commit=
# count of commits from last tag
tagrev=
# major version
major=
# minor version
minor=
# micro version
micro=
# get release or tag?
tagopt="--tags"
# get whole commit and parse
# if tagrev > 0 then add it and commit to micro version
# Expected format is:
# v#.###-g#######
init() {
describe_tag=$(git describe $tagopt --long --abbrev=7)
describe_tag=${describe_tag/v/}
describe_tag=${describe_tag/g/}
commit=$(echo $describe_tag | cut -d- -f3)
tagrev=$(echo $describe_tag | cut -d- -f2)
version=$(echo $describe_tag | cut -d- -f1)
micro=${version: -2}
[ $tagrev -gt 0 ] && micro=$micro-$tagrev-$commit
minor=${version: -3:1}
major=$(echo $version | cut -d. -f1)
}
[ ! $(which git) ] && die "Something very wrong: git not found."
[ $# -eq 0 ] && die "Must provide a command and optional argument."
# are we getting a release only?
if [ $# -eq 2 ]; then
if [ $2 = "-r" ]; then
tagopt=""
else
die "Invalid option. Must be -r or nothing."
fi
fi
init
case "$1" in
"all" )
retval=$describe_tag
;;
"commit" )
retval=$commit
;;
"tagrev" )
retval=$tagrev
;;
"version" )
retval=$version
;;
"major" )
retval=$major
;;
"minor" )
retval=$minor
;;
"micro" )
retval=$micro
;;
* )
die "Invalid command."
;;
esac
echo $retval
exit 0
|
