make_patchnum.sh

   1 #!/bin/sh
   2
   3 # this script is used to regenerate a number of special build files
   4 # based on either information contained in a file called .patch or
   5 # directly from git.
   6 # The files involved are:
   7 #   .patchnum         # information about the current checkout
   8 #   lib/Config_git.pl # holds some special configure settings related to git
   9 #   unpushed.h        # header file used by patchlevel.h to store unpushed commits
  10
  11 existing_patchnum=`cat .patchnum 2>/dev/null`
  12 existing_config=`cat lib/Config_git.pl 2>/dev/null`
  13 existing_unpushed=`cat unpushed.h 2>/dev/null`
  14
  15 unpushed_commits='/*no-op*/'
  16 if [ -s ".patch" ] ; then
  17         read branch snapshot_created commit_id describe < .patch
  18         changed=""
  19         extra_info="git_snapshot_date='$snapshot_created'"
  20         commit_title='Snapshot of:'
  21 elif [ -d ".git" ]; then
  22         branch=`git branch | awk 'BEGIN{ORS=""} /\*/ { print $2 }'`
  23         test -n "$branch" && remote=`git config branch.$branch.remote`
  24         commit_id=`git rev-parse HEAD`
  25         changed=`git diff-index --name-only HEAD`
  26         describe=`git describe --tags`
  27         commit_created=`git log -1 --pretty='format:%ci'`
  28         new_patchnum="describe: $describe"
  29         extra_info="git_commit_date='$commit_created'"
  30         if [ -n "$branch" ] && [ -n "$remote" ]; then
  31                 unpushed_commit_list=`git cherry $remote/$branch | awk 'BEGIN{ORS=","} /\+/ {print $2}' | sed -e 's/,$//'`
  32                 unpushed_commits=`git cherry $remote/$branch | awk 'BEGIN{ORS="\t\\\\\n"} /\+/ {print ",\"" $2 "\""}'`
  33
  34                 if [ -n "$unpushed_commits" ]; then
  35                         commit_title="Local Commit:"
  36                         ancestor=`git rev-parse $remote/$branch`
  37                         extra_info="$extra_info
  38 git_ancestor='$ancestor'
  39 git_unpushed='$unpushed_commit_list'"
  40                 fi
  41
  42         fi
  43         if [ -n "$changed" ]; then
  44                 changed="true"
  45                 commit_title="Derived from:"
  46                 new_patchnum="$new_patchnum
  47 status: uncommitted-changes"
  48         fi
  49         test -z "$commit_title" && commit_title='Commit id:'
  50 fi
  51
  52 new_unpushed=`cat <<EOFTEXT
  53 /*********************************************************************
  54 * WARNING: unpushed.h is automatically generated by make_patchnum.sh *
  55 *          DO NOT EDIT DIRECTLY - edit make_patchnum.sh instead      *
  56 *********************************************************************/
  57 #define PERL_GIT_UNPUSHED_COMMITS       $unpushed_commits
  58 /*leave-this-comment*/
  59 EOFTEXT
  60 `
  61 new_config=`cat <<EOFDATA
  62 #################################################################
  63 # WARNING: lib/Config_git.pl is generated by make_patchnum.sh   #
  64 #          DO NOT EDIT DIRECTLY - edit make_patchnum.sh instead #
  65 #################################################################
  66 \\$Config::Git_Data=<<'ENDOFGIT';
  67 git_commit_id='$commit_id'
  68 git_describe='$describe'
  69 git_branch='$branch'
  70 git_uncommitted_changes='$changed'
  71 git_commit_id_title='$commit_title'
  72 $extra_info
  73 ENDOFGIT
  74 EOFDATA
  75 `
  76 # only update the files if necessary, other build product depends on these files
  77 if [ "$existing_patchnum" != "$new_patchnum" ] || [ "$new_config" != "$existing_config" ] || [ "$existing_unpushed" != "$new_unpushed" ]; then
  78         echo "Updating .patchnum and lib/Config_git.pl"
  79         echo "$new_patchnum" > .patchnum
  80         echo "$new_config" > lib/Config_git.pl
  81         echo "$new_unpushed" > unpushed.h
  82 else
  83         echo "Reusing .patchnum and lib/Config_git.pl"
  84 fi
  85