git-gui/CREDITS-GEN

   1 #!/bin/sh
   2
   3 CF=CREDITS-FILE
   4 tip=
   5
   6 tree_search ()
   7 {
   8         head=$1
   9         tree=$2
  10         for p in $(git rev-list --parents --max-count=1 $head 2>/dev/null)
  11         do
  12                 test $tree = $(git rev-parse $p^{tree} 2>/dev/null) &&
  13                 vn=$(git describe --abbrev=4 $p 2>/dev/null) &&
  14                 case "$vn" in
  15                 gitgui-[0-9]*) echo $p; break;;
  16                 esac
  17         done
  18 }
  19
  20 generate_credits ()
  21 {
  22         tip=$1 &&
  23         rm -f $CF &&
  24         git shortlog -n -s $tip | sed 's/: .*$//' >$CF || exit
  25 }
  26
  27 # Always use the tarball credits file if found, just
  28 # in case we are somehow contained in a larger git
  29 # repository that doesn't actually track our state.
  30 # (At least one package manager is doing this.)
  31 #
  32 # We may be a subproject, so try looking for the merge
  33 # commit that supplied this directory content if we are
  34 # not at the toplevel.  We probably will always be the
  35 # second parent in the commit, but we shouldn't rely on
  36 # that fact.
  37 #
  38
  39 if test -f credits
  40 then
  41         rm -f $CF &&
  42         cp credits $CF || exit
  43 elif prefix="$(git rev-parse --show-prefix 2>/dev/null)" &&
  44    test -n "$prefix" &&
  45    head=$(git rev-list --max-count=1 HEAD -- . 2>/dev/null) &&
  46    tree=$(git rev-parse --verify "HEAD:$prefix" 2>/dev/null) &&
  47    tip=$(tree_search $head $tree) &&
  48    test -n "$tip"
  49 then
  50         generate_credits $tip || exit
  51 elif tip="$(git rev-parse --verify HEAD 2>/dev/null)" &&
  52    test -n "$tip"
  53 then
  54         generate_credits $tip || exit
  55 else
  56         echo "error: Cannot locate authorship information." >&2
  57         exit 1
  58 fi