scripts: use last set tag if none given

Makes 'delta' and 'contributors.sh' easier to use.

Make the delta script invoke contrithanks to get current number of
contributors instead of counting THANKS, for accuracy.

Closes #4881

1 files changed, 8 insertions, 4 deletions

diff --git a/scripts/delta b/scripts/delta
index bffa8e5c3..4b8a08915 100755
--- a/scripts/delta
+++ b/scripts/delta
@@ -30,10 +30,14 @@
 
 $start = $ARGV[0];
 
-if($start eq "") {
+if($start eq "-h") {
     print "Usage: summary [tag]\n";
     exit;
 }
+elsif($start eq "") {
+    $start = `git tag --sort=taggerdate | tail -1`;
+    chomp $start;
+}
 
 $commits = `git log --oneline $start.. | wc -l`;
 $committers = `git shortlog -s $start.. | wc -l`;
@@ -45,8 +49,8 @@ $acommitters = `git shortlog -s | wc -l`;
 # delta from now compared to before
 $ncommitters = $acommitters - $bcommitters;
 
-# number of contributors right now (according to THANKS)
-$acontribs = `cat docs/THANKS | grep -c '^[^ ]'`;
+# number of contributors right now
+$acontribs = `./scripts/contrithanks.sh | grep -c '^[^ ]'`;
 # number when the tag tag was set
 $bcontribs = `git show $start:docs/THANKS | grep -c '^[^ ]'`;
 # delta
@@ -118,7 +122,7 @@ printf "Commit authors: %d out of which %d are new (out of %d)\n",
     $committers, $ncommitters, $acommitters;
 printf "Contributors in RELEASE-NOTES: %d\n",
     $numcontributors;
-printf "New contributors (in THANKS): %d (out of %d)\n",
+printf "New contributors: %d (out of %d)\n",
     $contribs, $acontribs;
 printf "New curl_easy_setopt() options: %d (out of %d)\n",
     $nsetopts, $asetopts;