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-#!/bin/sh
-# NB: Supposed to be POSIX compatible but at least the usage of 'local' is not.
-#
-# This file is part of the flashrom project.
-#
-# Copyright (C) 2005 coresystems GmbH <stepan@coresystems.de>
-# Copyright (C) 2009,2010 Carl-Daniel Hailfinger
-# Copyright (C) 2010 Chromium OS Authors
-# Copyright (C) 2013-2016 Stefan Tauner
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-
-EXIT_SUCCESS=0
-EXIT_FAILURE=1
-
-# Make sure we don't get translated output
-export LC_ALL=C
-# nor local times or dates
-export TZ=UTC0
-
-# Helper functions
-# First argument is the path to inspect (usually optional; without
-# it the whole repository will be considered)
-git_has_local_changes() {
- git update-index -q --refresh >/dev/null
- ! git diff-index --quiet HEAD -- "$1"
-}
-
-git_last_commit() {
- # git rev-parse --short HEAD would suffice if repository as a whole is of interest (no $1)
- git log --pretty=format:"%h" -1 -- "$1"
-}
-
-git_is_file_tracked() {
- git ls-files --error-unmatch -- "$1" >/dev/null 2>&1
-}
-
-is_file_tracked() {
- git_is_file_tracked "$1"
-}
-
-# Tries to find a remote source for the changes committed locally.
-# This includes the URL of the remote repository including the last commit and a suitable branch name.
-# Takes one optional argument: the path to inspect
-git_url() {
- last_commit=$(git_last_commit "$1")
- # get all remote branches containing the last commit (excluding origin/HEAD)
- branches=$(git branch -r --contains $last_commit | sed '/\//!d;/.*->.*/d;s/[\t ]*//')
- if [ -z "$branches" ] ; then
- echo "No remote branch contains a suitable commit">&2
- return
- fi
-
- # find "nearest" branch
- local mindiff=9000
- local target=
- for branch in $branches ; do
- curdiff=$(git rev-list --count $last_commit..$branch)
- if [ $curdiff -ge $mindiff ] ; then
- continue
- fi
- mindiff=$curdiff
- target=$branch
- done
-
- echo "$(git ls-remote --exit-code --get-url ${target%/*}) ${target#*/}"
-}
-
-# Returns a string indicating where others can get the current source code (excluding uncommitted changes).
-# Takes one optional argument: the path to inspect
-scm_url() {
- local url=
-
- if git_is_file_tracked "$1" ; then
- url="$(git_url "$1")"
- else
- return ${EXIT_FAILURE}
- fi
-
- echo "${url}"
-}
-
-# Retrieve timestamp since last modification. If the sources are pristine,
-# then the timestamp will match that of the SCM's most recent modification
-# date.
-timestamp() {
- local t
-
- # date syntaxes are manifold:
- # gnu date [-d input]... [+FORMAT]
- # netbsd date [-ajnu] [-d date] [-r seconds] [+format] [[[[[[CC]yy]mm]dd]HH]MM[.SS]]
- # freebsd date [-jnu] [-d dst] [-r seconds] [-f fmt date | [[[[[cc]yy]mm]dd]HH]MM[.ss]] [+format] [...]
- # dragonflybsd date [-jnu] [-d dst] [-r seconds] [-f fmt date | [[[[[cc]yy]mm]dd]HH]MM[.ss]] [+format] [...]
- # openbsd date [-aju] [-d dst] [-r seconds] [+format] [[[[[[cc]yy]mm]dd]HH]MM[.SS]] [...]
- if git_is_file_tracked "$2" ; then
- # are there local changes?
- if git_has_local_changes "$2" ; then
- t=$(date -u "${1}")
- else
- # No local changes, get date of the last commit
- case $(uname) in
- # Most BSD dates do not support parsing date values from user input with -d but all of
- # them support parsing epoch seconds with -r. Thanks to git we can easily use that:
- NetBSD|OpenBSD|DragonFly|FreeBSD)
- t=$(date -u -r "$(git log --pretty=format:%ct -1 -- $2)" "$1" 2>/dev/null);;
- *)
- t=$(date -d "$(git log --pretty=format:%cD -1 -- $2)" -u "$1" 2>/dev/null);;
- esac
- fi
- else
- t=$(date -u "$1")
- fi
-
- if [ -z "$t" ]; then
- echo "Warning: Could not determine timestamp." 2>/dev/null
- fi
- echo "${t}"
-}
-
-revision() {
- local r
- if git_is_file_tracked "$1" ; then
- r=$(git describe --always $(git_last_commit "$1"))
- if git_has_local_changes "$1" ; then
- r="$r-dirty"
- fi
- else
- r="unknown"
- fi
-
- echo "${r}"
-}
-
-is_tracked() {
- is_file_tracked "$1"
-}
-
-show_help() {
- echo "Usage:
- ${0} <command> [path]
-
-Commands
- -h or --help
- this message
- -c or --check
- test if path is under version control at all
- -r or --revision
- return unique revision information including an indicator for
- uncommitted changes
- -U or --url
- URL associated with the latest commit
- -d or --date
- date of most recent modification
- -t or --timestamp
- timestamp of most recent modification
-"
- return
-}
-
-check_action() {
- if [ -n "$action" ]; then
- echo "Error: Multiple actions given.">&2
- exit ${EXIT_FAILURE}
- fi
-}
-
-main() {
- local query_path=
- local action=
-
- # Argument parser loop
- while [ $# -gt 0 ];
- do
- case ${1} in
- -h|--help)
- action=show_help;
- shift;;
- -U|--url)
- check_action $1
- action=scm_url
- shift;;
- -d|--date)
- check_action $1
- action="timestamp +%Y-%m-%d" # refrain from suffixing 'Z' to indicate it's UTC
- shift;;
- -r|--revision)
- check_action $1
- action=revision
- shift;;
- -t|--timestamp)
- check_action $1
- action="timestamp +%Y-%m-%dT%H:%M:%SZ" # There is only one valid time format! ISO 8601
- shift;;
- -c|--check)
- check_action $1
- action=is_tracked
- shift;;
- -*)
- show_help;
- echo "Error: Invalid option: ${1}"
- exit ${EXIT_FAILURE};;
- *)
- if [ -z "$query_path" ] ; then
- if [ ! -e "$1" ] ; then
- echo "Error: Path \"${1}\" does not exist.">&2
- exit ${EXIT_FAILURE}
- fi
- query_path=$1
- else
- echo "Warning: Ignoring overabundant parameter: \"${1}\"">&2
- fi
- shift;;
- esac;
- done
-
- # default to current directory (usually equals the whole repository)
- if [ -z "$query_path" ] ; then
- query_path=.
- fi
- if [ -z "$action" ] ; then
- show_help
- echo "Error: No actions specified"
- exit ${EXIT_FAILURE}
- fi
-
- $action "$query_path"
-}
-
-main $@