util/board_status/getrevision.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0-or-later
   3 #
   4 # From the flashrom project but heavily modified since then.
   5
   6 EXIT_SUCCESS=0
   7 EXIT_FAILURE=1
   8
   9 # Make sure we don't get translated output
  10 export LC_ALL=C
  11 # nor local times or dates
  12 export TZ=UTC0
  13
  14 # Helper functions
  15 git_has_local_changes() {
  16         git update-index -q --refresh >/dev/null
  17         ! git diff-index --quiet HEAD -- "$1"
  18 }
  19
  20 git_last_commit() {
  21         git log --pretty=format:"%h" -1 -- "$1"
  22 }
  23
  24 git_is_file_tracked() {
  25         git ls-files --error-unmatch -- "$1" >/dev/null 2>&1
  26 }
  27
  28 is_file_tracked() {
  29         git_is_file_tracked "$1"
  30 }
  31
  32 # Tries to find a remote source for the changes committed locally.
  33 # This includes the URL of the remote repository including the last commit and a suitable branch name.
  34 # Takes one optional argument: the path to inspect
  35 git_url() {
  36   # Note: This may not work as expected if multiple remotes are fetched from.
  37   echo $(git remote -v | grep "^origin\>" | \
  38          awk '/fetch/ {print $2; exit 0}' | sed "s,^.*@,,")
  39 }
  40
  41 # Returns a string indicating where others can get the current source code (excluding uncommitted changes)
  42 # Takes one optional argument: the path to inspect
  43 scm_url() {
  44         local url
  45
  46         url="$(git_url "$1")"
  47
  48         echo "${url}"
  49 }
  50
  51 # Retrieve timestamp since last modification. If the sources are pristine,
  52 # then the timestamp will match that of the SCM's most recent modification
  53 # date.
  54 timestamp() {
  55         local t
  56
  57         # date syntaxes are manifold:
  58         # gnu           date [-d input]... [+FORMAT]
  59         # netbsd        date [-ajnu] [-d date] [-r seconds] [+format] [[[[[[CC]yy]mm]dd]HH]MM[.SS]]
  60         # freebsd       date [-jnu]  [-d dst] [-r seconds] [-f fmt date | [[[[[cc]yy]mm]dd]HH]MM[.ss]] [+format] [...]
  61         # dragonflybsd  date [-jnu]  [-d dst] [-r seconds] [-f fmt date | [[[[[cc]yy]mm]dd]HH]MM[.ss]] [+format] [...]
  62         # openbsd       date [-aju]  [-d dst] [-r seconds] [+format] [[[[[[cc]yy]mm]dd]HH]MM[.SS]] [...]
  63         if git_is_file_tracked "$2" ; then
  64                 # are there local changes?
  65                 if git_has_local_changes "$2" ; then
  66                         t=$(date -u "${1}")
  67                 else
  68                         # No local changes, get date of the last commit
  69                         case $(uname) in
  70                         # Most BSD dates do not support parsing date values from user input with -d but all of
  71                         # them support parsing epoch seconds with -r. Thanks to git we can easily use that:
  72                         NetBSD|OpenBSD|DragonFly|FreeBSD)
  73                                 t=$(date -u -r "$(git log --pretty=format:%ct -1 -- $2)"  "$1" 2>/dev/null);;
  74                         *)
  75                                 t=$(date -d "$(git log --pretty=format:%cD -1 -- $2)" -u "$1" 2>/dev/null);;
  76                         esac
  77                 fi
  78         else
  79                 t=$(date -u "$1")
  80         fi
  81
  82         if [ -z "$t" ]; then
  83                 echo "Warning: Could not determine timestamp." 2>/dev/null
  84         fi
  85
  86         # output the time, changing colons to underscores.
  87         # gnu make doesn't work in directories with colons
  88         echo "${t}" | tr ':' '_'
  89 }
  90
  91 # Retrieve local SCM revision info. This is useful if we're working in a different SCM than upstream and/or
  92 # have local changes.
  93 local_revision() {
  94         local r
  95
  96         if git_is_file_tracked "$1" ; then
  97                 r=$(git_last_commit "$1")
  98
  99                 if git_has_local_changes "$1" ; then
 100                         r="$r-dirty"
 101                 fi
 102         else
 103                 return ${EXIT_FAILURE}
 104         fi
 105
 106         echo "${r}"
 107 }
 108
 109 # Similar to local_revision but uses "git describe" instead of "git log" which
 110 # includes number of commits since most recent tag.
 111 tagged_revision() {
 112         local r
 113
 114         if git_is_file_tracked "$1" ; then
 115                 r=$(git describe --tags --dirty)
 116         else
 117                 return ${EXIT_FAILURE}
 118         fi
 119
 120         echo "${r}"
 121 }
 122
 123 upstream_revision() {
 124         local r=
 125
 126         r=$(git log remotes/origin/master -1 --format=format:%h)
 127
 128         if [ -z "$r" ]; then
 129                 r="unknown" # default to unknown
 130         fi
 131         echo "${r}"
 132 }
 133
 134 show_help() {
 135         echo "Usage:
 136         ${0} <command> [path]
 137
 138 Commands
 139     -h or --help
 140         this message
 141     -l or --local
 142         local revision information including an indicator for uncommitted changes
 143     -u or --upstream
 144         upstream revision
 145     -T or --tags
 146         similar to -l, but uses \"git describe\" to obtain revision info with tags
 147     -U or --url
 148         URL associated with the latest commit
 149     -d or --date
 150         date of most recent modification
 151     -t or --timestamp
 152         timestamp of most recent modification
 153 "
 154         return
 155 }
 156
 157 check_action() {
 158         if [ -n "$action" ]; then
 159                 echo "Error: Multiple actions given.">&2
 160                 exit ${EXIT_FAILURE}
 161         fi
 162 }
 163
 164 main() {
 165         local query_path=
 166         local action=
 167
 168         # The is the main loop
 169         while [ $# -gt 0 ];
 170         do
 171                 case ${1} in
 172                 -h|--help)
 173                         action=show_help;
 174                         shift;;
 175                 -l|--local)
 176                         check_action $1
 177                         action=local_revision
 178                         shift;;
 179                 -T|--tags)
 180                         check_action $1
 181                         action=tagged_revision
 182                         shift;;
 183                 -u|--upstream)
 184                         check_action $1
 185                         action=upstream_revision
 186                         shift;;
 187                 -U|--url)
 188                         check_action $1
 189                         action=scm_url
 190                         shift;;
 191                 -d|--date)
 192                         check_action $1
 193                         action="timestamp +%Y-%m-%d" # refrain from suffixing 'Z' to indicate it's UTC
 194                         shift;;
 195                 -t|--timestamp)
 196                         check_action $1
 197                         action="timestamp +%Y-%m-%dT%H:%M:%SZ" # There is only one valid time format! ISO 8601
 198                         shift;;
 199                 -*)
 200                         show_help;
 201                         echo "Error: Invalid option: ${1}"
 202                         exit ${EXIT_FAILURE};;
 203                 *)
 204                         if [ -z "$query_path" ] ; then
 205                                 if [ ! -e "$1" ] ; then
 206                                         echo "Error: Path \"${1}\" does not exist.">&2
 207                                         exit ${EXIT_FAILURE}
 208                                 fi
 209                                 query_path=$1
 210                         else
 211                                 echo "Warning: Ignoring over-abundant paramter: \"${1}\"">&2
 212                         fi
 213                         shift;;
 214                 esac;
 215         done
 216
 217         # default to current directory (usually equals the whole repository)
 218         if [ -z "$query_path" ] ; then
 219                 query_path=.
 220         fi
 221         if ! is_file_tracked "$query_path" ; then
 222                 echo "Warning: Path \"${query_path}\" is not under version control.">&2
 223         fi
 224         if [ -z "$action" ] ; then
 225                 show_help
 226                 echo "Error: No actions specified"
 227                 exit ${EXIT_FAILURE}
 228         fi
 229
 230         $action "$query_path"
 231 }
 232
 233 main $@