scripts/delta

#!/usr/bin/env perl
#***************************************************************************
# _ _ ____ _
# Project ___| | | | _ \| |
# / __| | | | |_) | |
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at https://curl.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
# SPDX-License-Identifier: curl
#
###########################################################################

# Display changes done in the repository from [tag] until now.
#
# Uses git for repo data.
# Uses docs/THANKS and RELEASE-NOTES for current status.
#
# In the git clone root, invoke 'scripts/delta [release tag]'

$start = $ARGV[0];

if($start eq "-h") {
 print "Usage: summary [tag]\n";
 exit;
}
elsif($start eq "") {
 $start = `git tag --sort=taggerdate | grep "^curl-" | tail -1`;
 chomp $start;
}

$commits = `git log --oneline $start.. | wc -l`;
$committers = `git shortlog -s $start.. | wc -l`;
$bcommitters = `git shortlog -s $start | wc -l`;

$acommits = `git log --oneline | wc -l`;
$acommitters = `git shortlog -s | wc -l`;

# delta from now compared to before
$ncommitters = $acommitters - $bcommitters;

# 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
$contribs = $acontribs - $bcontribs;

# number of setops:
sub setopts {
 my ($f)=@_;
 open(H, "$f");
 my $opts;
 while(<H>) {
 if(/^ CURLOPT(|DEPRECATED)\(/ && ($_ !~ /OBSOLETE/)) {
 $opts++;
 }
 }
 close(H);
 return $opts;
}
$asetopts = setopts("<include/curl/curl.h");
$bsetopts = setopts("git show $start:include/curl/curl.h|");
$nsetopts = $asetopts - $bsetopts;

# Number of command line options:
$aoptions=`grep -c '{"....--' src/tool_listhelp.c`;
$boptions=`git show $start:src/tool_listhelp.c 2>/dev/null | grep -c '{"....--'`;
$noptions=$aoptions - $boptions;

# current local branch
$branch=`git rev-parse --abbrev-ref HEAD 2>/dev/null`;
chomp $branch;
# Number of files in git
$afiles=`git ls-files | wc -l`;
$deletes=`git diff-tree --diff-filter=A -r --summary origin/$branch $start | wc -l`;
$creates=`git diff-tree --diff-filter=D -r --summary origin/$branch $start | wc -l`;

# Time since that tag
$tagged=`git for-each-ref --format="%(refname:short) | %(taggerdate:unix)" refs/tags/* | grep ^$start | cut "-d|" -f2`; # unix timestamp
$taggednice=`git for-each-ref --format="%(refname:short) | %(creatordate)" refs/tags/* | grep ^$start | cut '-d|' -f2`; # human readable time
chomp $taggednice;
$now=`date +%s`;
$elapsed=$now - $tagged; # number of seconds since tag
$total=$now - `date -d 19980320 +%s`;

# Number of public functions in libcurl
$apublic=`git grep ^CURL_EXTERN -- include/curl | wc -l`;
$bpublic=`git grep ^CURL_EXTERN $start -- include/curl | wc -l`;
$public = $apublic - $bpublic;

# diffstat
$diffstat=`git diff --stat $start.. | tail -1`;
if($diffstat =~ /^ *(\d+) files changed, (\d+) insertions\(\+\), (\d+)/) {
 ($fileschanged, $insertions, $deletions)=($1, $2, $3);
}

# Changes/bug-fixes currently logged
open(F, "<RELEASE-NOTES");
while(<F>) {
 if($_ =~ /following changes:/) {
 $mode=1;
 }
 elsif($_ =~ /following bugfixes:/) {
 $mode=2;
 }
 elsif($_ =~ /known bugs:/) {
 $mode=3;
 }
 elsif($_ =~ /like these:/) {
 $mode=4;
 }
 if($_ =~ /^ o /) {
 if($mode == 1) {
 $numchanges++;
 }
 elsif($mode == 2) {
 $numbugfixes++;
 }
 }
 if(($mode == 4) && ($_ =~ /^ \((\d+) contributors/)) {
 $numcontributors = $1;
 }
}
close(F);

########################################################################
# Produce the summary

print "== Since $start $taggednice ==\n";
printf "Elapsed time: %.1f days (total %d)\n",
 $elapsed / 3600 / 24,
 $total / 3600 / 24;
printf "Commits: %d (total %d)\n",
 $commits, $acommits;
printf "Commit authors: %d, %d new (total %d)\n",
 $committers, $ncommitters, $acommitters;
printf "Contributors: %d, %d new (total %d)\n",
 $numcontributors, $contribs, $acontribs;
printf "New public functions: %d (total %d)\n",
 $public, $apublic;
printf "New curl_easy_setopt() options: %d (total %d)\n",
 $nsetopts, $asetopts;
printf "New command line options: %d (total %d)\n",
 $noptions, $aoptions;
printf "Changes logged: %d\n", $numchanges;
printf "Bugfixes logged: %d\n", $numbugfixes;
printf "Added files: %d (total %d)\n",
 $creates, $afiles;
printf "Deleted files: %d (delta: %d)\n", $deletes,
 $creates - $deletes;
print "Diffstat:$diffstat" if(!$fileschanged);
printf "Files changed: %d\n", $fileschanged;
printf "Lines inserted: %d\n", $insertions;
printf "Lines deleted: %d (delta: %d)\n", $deletions,
 $insertions - $deletions;