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#!/usr/bin/env bash
#
# Retrieves git repository info for directory ${1} using command ${2}
function repo_info()
{
local repo_dir git_exe commit upstream err
# Process args
repo_dir='.'
if [[ ${1} ]]; then
repo_dir=${1}
fi
git_exe='git'
if [[ ${2} ]]; then
git_exe=${2}
fi
# Switch to working directory
if ! cd ${repo_dir} 2>/dev/null; then
echo "Invalid directory ${repo_dir}." 1>&2
return 1
fi
# Check whether we have git
if ! hash ${git_exe} 2>/dev/null; then
echo "Command '${git_exe}' not found." 1>&2
return 1
fi
# Check if there is a valid git repo here
HASH=$(${git_exe} rev-parse HEAD)
SHORTHASH=$(${git_exe} rev-parse --short HEAD)
err=$?
if [[ ${err} -ne 0 ]]; then
echo "Not a valid repository." 1>&2
return ${err}
elif [[ -z ${HASH} ]]; then
echo "Not a valid repository." 1>&2
return 1
fi
# Retrieve info
URL=$(${git_exe} config remote.origin.url)
# check if an annotated tag is reachable from HEAD
TAG=$(${git_exe} describe --tags --abbrev=0 --exact-match --match \[0-9\]\*.\[0-9\]\*.\[0-9\]\* HEAD 2> /dev/null)
if [[ ${TAG} ]]; then
# if TAG is a release tag and HASH == TAG_HASH, this is release code
TAG_HASH=$(${git_exe} rev-list ${TAG} --max-count=1)
REV=$(${git_exe} rev-list $(${git_exe} merge-base ${TAG} HEAD).. --count)
else
REV=$(${git_exe} rev-list HEAD --count)
fi
BRANCH=$(${git_exe} symbolic-ref -q --short HEAD)
REMOTE="${URL}"
upstream=$(${git_exe} config branch.${BRANCH}.remote)
if [[ ${upstream} ]]; then
REMOTE="${upstream}"
fi
DATE=$(${git_exe} log -1 --format="format:%ci")
# Output
# Only write tag and rev if they exist.
echo "URL=${URL}"
echo "HASH=${HASH}"
echo "SHORTHASH=${SHORTHASH}"
if [[ ${TAG} ]]; then echo "TAG=${TAG}"; fi
if [[ ${TAG_HASH} ]]; then echo "TAG_HASH=${TAG_HASH}"; fi
if [[ ${REV} ]]; then echo "REV=${REV}"; fi
echo "BRANCH=${BRANCH}"
echo "REMOTE=${REMOTE}"
echo "DATE=${DATE}"
return 0
}
repo_info "$@"
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