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         # this is the minimal expectation for the
  18         read branch snapshot_created commit_id describe < .patch
  19         changed=""
  20         extra_info="git_snapshot_date='$snapshot_created'"
  21         commit_title='Snapshot of:'
  22 elif [ -d ".git" ]; then
  23         branch=`git branch | awk 'BEGIN{ORS=""} /\*/ { print $2 }'`
  24         test -n "$branch" && remote=`git config branch.$branch.remote`
  25         commit_id=`git rev-parse HEAD`
  26         changed=`git diff-index --name-only HEAD`
  27         describe=`git describe --tags`
  28         commit_created=`git log -1 --pretty='format:%ci'`
  29         extra_info="git_commit_date='$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 else
  44         cat <<SNDOGS
  45 Something is wrong with your source tree. You should
  46 either have a .git directory and a functional git toolset
  47 OR should have a .patch file in the source tree. Please
  48 report the particulars of this situation to
  49 perl5-porters@perl.org.
  50 SNDOGS
  51         exit 2
  52 fi
  53
  54 # Set up defaults for various values
  55 new_patchnum="describe: $describe"
  56 if [ -n "$changed" ]; then
  57         changed="true"
  58         commit_title="Derived from:"
  59         new_patchnum="$new_patchnum
  60 status: uncommitted-changes"
  61 fi
  62 test -z "$commit_title" && commit_title='Commit id:'
  63
  64 new_unpushed=`cat <<EOFTEXT
  65 /*********************************************************************
  66 * WARNING: unpushed.h is automatically generated by make_patchnum.sh *
  67 *          DO NOT EDIT DIRECTLY - edit make_patchnum.sh instead      *
  68 *********************************************************************/
  69 #define PERL_GIT_UNPUSHED_COMMITS       $unpushed_commits
  70 /*leave-this-comment*/
  71 EOFTEXT
  72 `
  73 new_config=`cat <<EOFDATA
  74 #################################################################
  75 # WARNING: lib/Config_git.pl is generated by make_patchnum.sh   #
  76 #          DO NOT EDIT DIRECTLY - edit make_patchnum.sh instead #
  77 #################################################################
  78 \\$Config::Git_Data=<<'ENDOFGIT';
  79 git_commit_id='$commit_id'
  80 git_describe='$describe'
  81 git_branch='$branch'
  82 git_uncommitted_changes='$changed'
  83 git_commit_id_title='$commit_title'
  84 $extra_info
  85 ENDOFGIT
  86 EOFDATA
  87 `
  88 # only update the files if necessary, other build product depends on these files
  89 if [ "$existing_patchnum" != "$new_patchnum" ] || [ "$new_config" != "$existing_config" ] || [ "$existing_unpushed" != "$new_unpushed" ]; then
  90         echo "Updating .patchnum and lib/Config_git.pl"
  91         echo "$new_patchnum" > .patchnum
  92         echo "$new_config" > lib/Config_git.pl
  93         echo "$new_unpushed" > unpushed.h
  94 else
  95         echo "Reusing .patchnum and lib/Config_git.pl"
  96 fi
  97