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  1. #!/bin/sh
  2.  
  3. # check for git short hash
  4. if ! test "$revision"; then
  5.     revision=$(cd "$1" && git describe --tags --match N 2> /dev/null)
  6. fi
  7.  
  8. # Shallow Git clones (--depth) do not have the N tag:
  9. # use 'git-YYYY-MM-DD-hhhhhhh'.
  10. test "$revision" || revision=$(cd "$1" &&
  11.   git log -1 --pretty=format:"git-%cd-%h" --date=short 2> /dev/null)
  12.  
  13. # Snapshots from gitweb are in a directory called ffmpeg-hhhhhhh or
  14. # ffmpeg-HEAD-hhhhhhh.
  15. if [ -z "$revision" ]; then
  16.   srcdir=$(cd "$1" && pwd)
  17.   case "$srcdir" in
  18.     */ffmpeg-[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f])
  19.       git_hash="${srcdir##*-}";;
  20.     */ffmpeg-HEAD-[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f])
  21.       git_hash="${srcdir##*-}";;
  22.   esac
  23. fi
  24.  
  25. # no revision number found
  26. test "$revision" || revision=$(cd "$1" && cat RELEASE 2> /dev/null)
  27.  
  28. # Append the Git hash if we have one
  29. test "$revision" && test "$git_hash" && revision="$revision-$git_hash"
  30.  
  31. # releases extract the version number from the VERSION file
  32. version=$(cd "$1" && cat VERSION 2> /dev/null)
  33. test "$version" || version=$revision
  34.  
  35. test -n "$3" && version=$version-$3
  36.  
  37. if [ -z "$2" ]; then
  38.     echo "$version"
  39.     exit
  40. fi
  41.  
  42. NEW_REVISION="#define FFMPEG_VERSION \"$version\""
  43. OLD_REVISION=$(cat version.h 2> /dev/null)
  44.  
  45. # Update version.h only on revision changes to avoid spurious rebuilds
  46. if test "$NEW_REVISION" != "$OLD_REVISION"; then
  47.     echo "$NEW_REVISION" > "$2"
  48. fi
  49.