Switching to `` requires one more \ to escape $Config in new_config=`...`

[p5sagit/p5-mst-13.2.git] / make_patchnum.sh

diff --git a/make_patchnum.sh b/make_patchnum.sh
index b06a4f3..a00e121 100644 (file)
--- a/make_patchnum.sh
+++ b/make_patchnum.sh
@@ -1,18 +1,85 @@
 #!/bin/sh
 
-Existing=`cat .patchnum 2>/dev/null`
-if [ -e ".patch" ]; then
-       Current=`awk '{print $4}' .patch`
+# this script is used to regenerate a number of special build files
+# based on either information contained in a file called .patch or
+# directly from git.
+# The files involved are:
+#   .patchnum         # information about the current checkout
+#   lib/Config_git.pl # holds some special configure settings related to git
+#   unpushed.h        # header file used by patchlevel.h to store unpushed commits
+
+existing_patchnum=`cat .patchnum 2>/dev/null`
+existing_config=`cat lib/Config_git.pl 2>/dev/null`
+existing_unpushed=`cat unpushed.h 2>/dev/null`
+
+unpushed_commits='/*no-op*/'
+if [ -s ".patch" ] ; then
+       read branch snapshot_created commit_id describe < .patch
+       changed=""
+       extra_info="git_snapshot_date='$snapshot_created'"
+       commit_title='Snapshot of:'
 elif [ -d ".git" ]; then
-       # we should do something better here
-       Current=`git describe`
-       Changed=`git diff-index --name-only HEAD`
-       [ -n "$Changed" ] && Current="$Current-with-uncommitted-changes"
+       branch=`git branch | awk 'BEGIN{ORS=""} /\*/ { print $2 }'`
+       test -n "$branch" && remote=`git config branch.$branch.remote`
+       commit_id=`git rev-parse HEAD`
+       changed=`git diff-index --name-only HEAD`
+       describe=`git describe --tags`
+       commit_created=`git log -1 --pretty='format:%ci'`
+       new_patchnum="describe: $describe"
+       extra_info="git_commit_date='$commit_created'"
+       if [ -n "$branch" ] && [ -n "$remote" ]; then
+               unpushed_commit_list=`git cherry $remote/$branch | awk 'BEGIN{ORS=","} /\+/ {print $2}' | sed -e 's/,$//'`
+               unpushed_commits=`git cherry $remote/$branch | awk 'BEGIN{ORS="\t\\\\\n"} /\+/ {print ",\"" $2 "\""}'`
+
+               if [ -n "$unpushed_commits" ]; then
+                       commit_title="Local Commit:"
+                       ancestor=`git rev-parse $remote/$branch`
+                       extra_info="$extra_info
+git_ancestor='$ancestor'
+git_unpushed='$unpushed_commit_list'"
+               fi
+                       
+       fi
+       if [ -n "$changed" ]; then
+               changed="true"
+               commit_title="Derived from:"
+               new_patchnum="$new_patchnum
+status: uncommitted-changes"
+       fi
+       test -z "$commit_title" && commit_title='Commit id:'
 fi
 
-if [ "$Existing" != "$Current" ]; then
-       echo "Updating .patchnum"
-       echo $Current > .patchnum
+new_unpushed=`cat <<EOFTEXT
+/*********************************************************************
+* WARNING: unpushed.h is automatically generated by make_patchnum.sh *
+*          DO NOT EDIT DIRECTLY - edit make_patchnum.sh instead      *
+*********************************************************************/
+#define PERL_GIT_UNPUSHED_COMMITS       $unpushed_commits
+/*leave-this-comment*/
+EOFTEXT
+`
+new_config=`cat <<EOFDATA
+#################################################################
+# WARNING: lib/Config_git.pl is generated by make_patchnum.sh   #
+#          DO NOT EDIT DIRECTLY - edit make_patchnum.sh instead #
+#################################################################
+\\$Config::Git_Data=<<'ENDOFGIT';
+git_commit_id='$commit_id'
+git_describe='$describe'
+git_branch='$branch'
+git_uncommitted_changes='$changed'
+git_commit_id_title='$commit_title'
+$extra_info
+ENDOFGIT
+EOFDATA
+`
+# only update the files if necessary, other build product depends on these files
+if [ "$existing_patchnum" != "$new_patchnum" ] || [ "$new_config" != "$existing_config" ] || [ "$existing_unpushed" != "$new_unpushed" ]; then
+       echo "Updating .patchnum and lib/Config_git.pl"
+       echo "$new_patchnum" > .patchnum
+       echo "$new_config" > lib/Config_git.pl
+       echo "$new_unpushed" > unpushed.h
 else
-       echo "Reusing .patchnum" 
+       echo "Reusing .patchnum and lib/Config_git.pl"
 fi
+