ffmpeg/version.sh

   1 #!/bin/sh
   2
   3 # Usage: version.sh <ffmpeg-root-dir> <output-version.h> <extra-version>
   4
   5 # check for git short hash
   6 if ! test "$revision"; then
   7     if (cd "$1" && grep git RELEASE 2> /dev/null >/dev/null) ; then
   8         revision=$(cd "$1" && git describe --tags --match N 2> /dev/null)
   9     else
  10         revision=$(cd "$1" && git describe --tags --always 2> /dev/null)
  11     fi
  12 fi
  13
  14 # Shallow Git clones (--depth) do not have the N tag:
  15 # use 'git-YYYY-MM-DD-hhhhhhh'.
  16 test "$revision" || revision=$(cd "$1" &&
  17   git log -1 --pretty=format:"git-%cd-%h" --date=short 2> /dev/null)
  18
  19 # Snapshots from gitweb are in a directory called ffmpeg-hhhhhhh or
  20 # ffmpeg-HEAD-hhhhhhh.
  21 if [ -z "$revision" ]; then
  22   srcdir=$(cd "$1" && pwd)
  23   case "$srcdir" in
  24     */ffmpeg-[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f])
  25       git_hash="${srcdir##*-}";;
  26     */ffmpeg-HEAD-[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f])
  27       git_hash="${srcdir##*-}";;
  28   esac
  29 fi
  30
  31 # no revision number found
  32 test "$revision" || revision=$(cd "$1" && cat RELEASE 2> /dev/null)
  33
  34 # Append the Git hash if we have one
  35 test "$revision" && test "$git_hash" && revision="$revision-$git_hash"
  36
  37 # releases extract the version number from the VERSION file
  38 version=$(cd "$1" && cat VERSION 2> /dev/null)
  39 test "$version" || version=$revision
  40
  41 test -n "$3" && version=$version-$3
  42
  43 if [ -z "$2" ]; then
  44     echo "$version"
  45     exit
  46 fi
  47
  48 NEW_REVISION="#define FFMPEG_VERSION \"$version\""
  49 OLD_REVISION=$(cat "$2" 2> /dev/null | head -3 | tail -1)
  50
  51 # String used for preprocessor guard
  52 GUARD=$(echo "$2" | sed 's/\//_/' | sed 's/\./_/' | tr '[:lower:]' '[:upper:]' | sed 's/LIB//')
  53
  54 # Update version header only on revision changes to avoid spurious rebuilds
  55 if test "$NEW_REVISION" != "$OLD_REVISION"; then
  56     cat << EOF > "$2"
  57 #ifndef $GUARD
  58 #define $GUARD
  59 $NEW_REVISION
  60 #endif /* $GUARD */
  61 EOF
  62 fi