redshift-check: reset cwd to / rather than $HOME

[home.git] / .bin / vcs-url

#!/bin/bash

err() { echo "error: $*" >&2; exit 1; }

_cvs_url() {
	[[ $# -gt 1 ]] && err "accepted args: <file>[:rev1[:rev2]]"

	# spec has the form file:rev1[:rev2]
	# rev2 defaults to rev1-1
	export IFS=:
	set -- $1
	unset IFS

	local file=$1
	if [[ ! -e ${file} ]] ; then
		echo "file '${file}' does not exist"
		return 1
	fi
	local dir="."
	[[ ${file} == */* ]] && dir=${file%/*}
	file=${file##*/}

	local rev2=$2
	if [[ -z ${rev2} ]] ; then
		rev2=$(
			cd ${dir}
			export IFS=/
			set -- $(grep /${file}/ CVS/Entries)
			unset IFS
			echo $3
		)
		if [[ ${rev2} == "0" ]] ; then
			# new file
			rev2="1.1"
		else
			# existing file, bump rev automatically
			rev2="1.$((${rev2#1.}+1))"
		fi
	fi
	local rev2r=${rev2#1.}
	local rev1=${3:-1.$((rev2r - 1))}

	local cvsroot=$(<${dir}/CVS/Repository)
	if [[ ${cvsroot} == gentoo-x86* ]] ; then
		cvsroot=${cvsroot#gentoo-x86}
		cvsroot=${cvsroot#/}
	fi

	local urirev
	[[ ${rev2} == "1.1" || ${rev1} == "${rev2}" ]] \
		&& urirev="?rev=${rev2}" \
		|| urirev="?r1=${rev1}&r2=${rev2}"
	echo "http://sources.gentoo.org/${cvsroot}/${file}${urirev}"
}
cvs_url() {
	local f
	for f in "$@" ; do
		_cvs_url "${f}"
	done
}

git_url() {
	[[ $# -gt 1 ]] && err "accepted args: <rev>"

	local repo url
	local remote=$(git config remote.origin.url)
	case ${remote} in
	*://uclibc.org/*|*://git.uclibc.org/*|\
	*://busybox.net/*|*://git.busybox.net/*|\
	*://buildroot.org/*|*://git.buildroot.org/*|\
	*://buildroot.net/*|*://git.buildroot.net/*)
		repo=$(echo "${remote}" | sed -e 's,^[^:]*://[^/]*/,,' -e 's:[.]git$::')
		url="https://git.${repo,,}.org/${repo}/commit/?id="
		;;
	*://git@git.gentoo.org/*|\
	*://anongit.gentoo.org/*)
		repo=$(echo "${remote}" | sed 's:.*git[.a-z]*.gentoo.org/::')
		url="http://gitweb.gentoo.org/${repo}/commit/?id="
		;;
	git@github.com/*|\
	*://github.com/*)
		repo=$(echo "${remote}" | sed -e 's,^git@github.com/,,' -e 's,^https://github.com/,,' -e 's:[.]git$::')
		url="https://github.com/${repo}/commit/"
		;;
	*)
		echo "Unknown remote: ${remote}"
		exit 1
		;;
	esac

	git log -n3 ${1:-HEAD} | sed "s,^commit ,${url},"
}

svn_url() {
	if [[ $# -eq 0 ]] ; then
		svn info | \
		awk '{
			if ($1 == "URL:") {
				URL = "http://sources.gentoo.org/" gensub(/.*svnroot\/([^/]*).*/,"\\1","");
			} else if ($1 == "Revision:") {
				rev = $2
				URL = URL "?rev=" (rev + 1) "&view=rev"
			}
		}
		END { print URL }'
		return 0
	fi

	local f
	for f in "$@" ; do
		svn info "${f}" | \
		awk '{
			if ($1 == "URL:") {
				sub(/.*svnroot/,"")
				URL = "http://sources.gentoo.org" $1 "?"
			} else if ($1 == "Revision:") {
				rev = $2
				URL = URL "r1=" rev "&r2=" (rev + 1)
			}
		}
		END { print URL }'
	done
}

usage() {
	exec cat <<-EOF
	Usage: $0 [options] [args]

	Options:
	  -c       CVS URL
	  -g       GIT URL (default)
	  -s       SVN URL
	  -x       Trace the script
	  -h       Help
	EOF
}

main() {
	local vcs="git"
	while [[ $# -gt 0 ]] ; do
		case $1 in
		-c) vcs="cvs";;
		-s) vcs="svn";;
		-g) vcs="git";;
		-x) set -x;;
		-h) usage;;
		--) shift; break;;
		-*) usage;;
		*)  break;;
		esac
		shift
	done

	case ${vcs} in
	cvs) cvs_url "$@";;
	git) git_url "$@";;
	svn) svn_url "$@";;
	esac
}
main "$@"