#!/bin/sh # SPDX-License-Identifier: GPL-2.0-or-later # # From the flashrom project but heavily modified since then. 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 git_has_local_changes() { git update-index -q --refresh >/dev/null ! git diff-index --quiet HEAD -- "$1" } git_last_commit() { 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() { # Note: This may not work as expected if multiple remotes are fetched from. echo $(git remote -v | grep "^origin\>" | \ awk '/fetch/ {print $2; exit 0}' | sed "s,^.*@,,") } # Returns a string indicating where others can get the current source code (excluding uncommitted changes) # Takes one optional argument: the path to inspect scm_url() { local url url="$(git_url "$1")" echo "${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 # output the time, changing colons to underscores. # gnu make doesn't work in directories with colons echo "${t}" | tr ':' '_' } # Retrieve local SCM revision info. This is useful if we're working in a different SCM than upstream and/or # have local changes. local_revision() { local r if git_is_file_tracked "$1" ; then r=$(git_last_commit "$1") if git_has_local_changes "$1" ; then r="$r-dirty" fi else return ${EXIT_FAILURE} fi echo "${r}" } # Similar to local_revision but uses "git describe" instead of "git log" which # includes number of commits since most recent tag. tagged_revision() { local r if git_is_file_tracked "$1" ; then r=$(git describe --tags --dirty) else return ${EXIT_FAILURE} fi echo "${r}" } upstream_revision() { local r= r=$(git log remotes/origin/master -1 --format=format:%h) if [ -z "$r" ]; then r="unknown" # default to unknown fi echo "${r}" } show_help() { echo "Usage: ${0} <command> [path] Commands -h or --help this message -l or --local local revision information including an indicator for uncommitted changes -u or --upstream upstream revision -T or --tags similar to -l, but uses \"git describe\" to obtain revision info with tags -U or --url URL associated with the latest commit -d or --date date of most recent modification -t or --timestamp timestamp of most recent modification " return } check_action() { if [ -n "$action" ]; then echo "Error: Multiple actions given.">&2 exit ${EXIT_FAILURE} fi } main() { local query_path= local action= # The is the main loop while [ $# -gt 0 ]; do case ${1} in -h|--help) action=show_help; shift;; -l|--local) check_action $1 action=local_revision shift;; -T|--tags) check_action $1 action=tagged_revision shift;; -u|--upstream) check_action $1 action=upstream_revision 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;; -t|--timestamp) check_action $1 action="timestamp +%Y-%m-%dT%H:%M:%SZ" # There is only one valid time format! ISO 8601 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=$1 else echo "Warning: Ignoring over-abundant paramter: \"${1}\"">&2 fi shift;; esac; done # default to current directory (usually equals the whole repository) if [ -z "$query_path" ] ; then query_path=. fi if ! is_file_tracked "$query_path" ; then echo "Warning: Path \"${query_path}\" is not under version control.">&2 fi if [ -z "$action" ] ; then show_help echo "Error: No actions specified" exit ${EXIT_FAILURE} fi $action "$query_path" } main $@