Here's an updated version of this script if anyone is interested.
It can now do the git-blame calls in parallel. Use -t #threads.
Here's the usage info:
' -c print count of all lines in all files at the end',
' -f produce file centric output (overrides -l and -s)',
' -l produce longer format',
' -s produce short format, line count and author only',
' -ls Both -l and -s produce an even longer long format',
' -t n set number of threads to use',
' -x re exclude files matching regex',
' -v be more verbose',
Enjoy.
-Brandon
---
git_blame_stats.perl | 387 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 387 insertions(+), 0 deletions(-)
create mode 100755 git_blame_stats.perl
diff --git a/git_blame_stats.perl b/git_blame_stats.perl
new file mode 100755
index 0000000..618cf0a
--- /dev/null
+++ b/git_blame_stats.perl
@@ -0,0 +1,387 @@
+#!/usr/bin/perl -w
+
+use lib (split(/:/, $ENV{GITPERLLIB} || '/path/to/git/lib/perl5/site_perl/5.10.0'));
+
+use strict;
+use threads;
+use Thread::Queue;
+use Getopt::Std;
+use Git;
+
+my @LSTREE_OPTS = ('-r', '--name-only');
+my @BLAME_OPTS = ('-C', '-C', '-w', '--incremental');
+
+$Getopt::Std::STANDARD_HELP_VERSION = 1;
+$main::VERSION = 1.0;
+
+sub usage {
+ my $name;
+
+ eval {
+ require File::Basename;
+ $name = File::Basename::basename($0);
+ } or do {
+ $name = substr $0, rindex($0, '/') + 1;
+ };
+
+ print 'Usage: ', $name, ' [--help] [-cflstvx] <rev> [paths...]', "\n";
+}
+
+sub main::HELP_MESSAGE {
+ my $fh = shift;
+
+ eval {select $fh; usage};
+
+ local $\ = "\n";
+ local $, = "\n";
+
+ print $fh '',
+ 'Generate authorship statistics from a git repository.',
+ '',
+ 'OPTIONS',
+ ' -c print count of all lines in all files at the end',
+ ' -f produce file centric output (overrides -l and -s)',
+ ' -l produce longer format',
+ ' -s produce short format, line count and author only',
+ ' -ls Both -l and -s produce an even longer long format',
+ ' -t n set number of threads to use',
+ ' -x re exclude files matching regex',
+ ' -v be more verbose',
+ ' --help this text',
+ '';
+}
+
+sub parse_blame_entry {
+ my $fh = shift;
+
+ return () unless defined($_ = <$fh>);
+ chomp;
+
+ my ($sha1, $sourceline, $resultline, $num_lines) = split;
+
+ return () unless defined $num_lines;
+
+ my %h = (sha1 => $sha1, sourceline => $sourceline,
+ resultline => $resultline, lines => $num_lines);
+ while (<$fh>) {
+ chomp;
+ my ($key, $val) = split ' ', $_, 2;
+ $h{$key} = $val;
+ last if m/^filename /;
+ }
+
+ return %h;
+}
+
+sub blame_file {
+ my $repo = shift;
+ my $ref = shift;
+ my $filename = shift;
+ my $authors = shift;
+
+ my ($fh, $ctx) = $repo->command_output_pipe('blame', @BLAME_OPTS,
+ $ref, '--', $filename);
+
+ my %commits;
+ while (my %h = parse_blame_entry $fh) {
+
+ if (! exists $commits{$h{'sha1'}}) {
+
+ if (! exists $authors->{$h{'author'}}->{$filename}) {
+ $authors->{$h{'author'}}->{$filename} = 0;
+ }
+ $commits{$h{'sha1'}} =
+ \$authors->{$h{'author'}}->{$filename};
+ }
+
+ ${$commits{$h{'sha1'}}} += $h{'lines'};
+ }
+
+ $repo->command_close_pipe($fh, $ctx);
+}
+
+sub count_total_lines {
+ my $authors = shift;
+
+ my $lines = 0;
+
+ for (values %{$authors}) {
+ for (values %{$_}) { $lines += $_; }
+ }
+
+ return $lines;
+}
+
+# Returns hash
+# key: author name
+# value: authored lines
+sub count_author_lines {
+ my $authors = shift;
+
+ my %alines;
+
+ foreach my $author (keys %{$authors}) {
+ my $lines = 0;
+ for (values %{$authors->{$author}}) { $lines += $_; }
+ $alines{$author} = $lines;
+ }
+
+ return %alines;
+}
+
+# Returns hash
+# key: filename
+# value: lines in file
+sub count_file_lines {
+ my $authors = shift;
+
+ my %flines;
+
+ for (values %{$authors}) {
+ foreach my $file (keys %{$_}) {
+ $flines{$file} += $_->{$file};
+ }
+ }
+
+ return %flines;
+}
+
+# Short format
+# lines author
+sub print_short {
+ my $authors = shift;
+
+ my %alines = count_author_lines $authors;
+
+ foreach my $author (sort {$alines{$b} <=> $alines{$a}} keys %alines) {
+ printf "%6d %s\n", $alines{$author}, $author;
+ }
+}
+
+# Long format
+# author (lines):
+# file_lines filename
+# file_lines filename
+# file_lines filename
+sub print_long {
+ my $authors = shift;
+
+ my %alines = count_author_lines $authors;
+
+ foreach my $author (sort {$alines{$b} <=> $alines{$a}} keys %alines) {
+ print $author, ' (', $alines{$author}, '):', "\n";
+ foreach my $file (sort
+ {$authors->{$author}->{$b} <=> $authors->{$author}->{$a}}
+ keys %{$authors->{$author}}) {
+ printf " %10d %s\n", $authors->{$author}->{$file},
+ $file;
+ }
+ }
+}
+
+# Longer format
+# author (lines, % of all lines):
+# file_lines (% of author lines) filename
+# file_lines (% of author lines) filename
+sub print_longer {
+ my $authors = shift;
+
+ my %alines = count_author_lines $authors;
+ my $total_lines = count_total_lines $authors;
+
+ foreach my $author (sort {$alines{$b} <=> $alines{$a}} keys %alines) {
+ printf "%s (%d, %.2f%%):\n", $author, $alines{$author},
+ 100. * $alines{$author} / $total_lines;
+ foreach my $file (sort
+ {$authors->{$author}->{$b} <=> $authors->{$author}->{$a}}
+ keys %{$authors->{$author}}) {
+ printf " %10d (%5.2f%%) %s\n",
+ $authors->{$author}->{$file},
+ 100. *
+ $authors->{$author}->{$file} / $alines{$author},
+ $file;
+ }
+ }
+}
+
+# Longer format
+# author (# lines in X files, % of all lines, % of all files):
+# lines (% of file) file_lines (% of author lines) filename
+# lines (% of file) file_lines (% of author lines) filename
+sub print_with_file_percentage {
+ my $authors = shift;
+
+ my %alines = count_author_lines $authors;
+ my %flines = count_file_lines $authors;
+ my $total_lines = count_total_lines $authors;
+ my $total_files = scalar(keys %flines);
+
+ foreach my $author (sort {$alines{$b} <=> $alines{$a}} keys %alines) {
+ printf "%s (%d lines in %d files, " .
+ "%.2f%% of all lines, %.2f%% of all files):\n",
+ $author, $alines{$author},
+ scalar(keys %{$authors->{$author}}),
+ 100. * $alines{$author} / $total_lines,
+ 100. * scalar(keys %{$authors->{$author}})/$total_files;
+ foreach my $file (sort
+ {$authors->{$author}->{$b} <=> $authors->{$author}->{$a}}
+ keys %{$authors->{$author}}) {
+ printf " %10d (%6.2f%%) of %6d (%6.2f%%) %s\n",
+ $authors->{$author}->{$file},
+ 100. *
+ $authors->{$author}->{$file} / $flines{$file},
+ $flines{$file},
+ 100. *
+ $authors->{$author}->{$file} / $alines{$author},
+ $file;
+ }
+ }
+}
+
+# File perspective format
+# filename (lines):
+# lines author
+# lines author
+sub print_with_file_perspective {
+ my $authors = shift;
+
+ my %flines = count_file_lines $authors;
+
+ foreach my $file (sort keys %flines) {
+ my @auths = grep {exists $authors->{$_}->{$file}}
+ keys %{$authors};
+ print $file, ' (', $flines{$file}, '):', "\n";
+ foreach my $author (sort
+ {$authors->{$b}->{$file} <=> $authors->{$a}->{$file}}
+ @auths) {
+ printf " %10d %s\n", $authors->{$author}->{$file},
+ $author;
+ }
+ }
+}
+
+
+my $verbose = 0;
+my $output_format = 0;
+my $show_total = 0;
+my $exclude_pattern;
+my $nthreads = 1;
+
+our ($opt_c, $opt_f, $opt_l, $opt_s, $opt_t, $opt_v, $opt_x);
+getopts('cflst:vx:') or die 'Invalid options specified';
+
+ if ($opt_c) {
+ $show_total = 1;
+ }
+ if ($opt_f) {
+ $output_format = 4;
+ } elsif ($opt_l && $opt_s) {
+ $output_format = 3;
+ } elsif ($opt_l) {
+ $output_format = 2;
+ } elsif ($opt_s) {
+ $output_format = 1;
+ }
+ if (defined $opt_t) {
+ $nthreads = $opt_t;
+ if ($nthreads !~ /^\d+$/ || $nthreads < 0) {
+ die 'Error: argument to -t must be integer >= 0';
+ }
+ if ($nthreads == 0) {
+ eval {
+ require Sys::CPU;
+ $nthreads = Sys::CPU::cpu_count();
+ } or $nthreads = 1;
+ }
+ }
+ if ($opt_v) {
+ $verbose = 1;
+ }
+ if ($opt_x) {
+ $exclude_pattern = $opt_x;
+ }
+
+eval {select STDERR; usage; exit 1} unless $#ARGV >= 0;
+
+my %authors;
+my @thr;
+my $repo = Git->repository();
+
+# Spawn ls-tree now, so it can fail before creating the threads
+my ($fh, $ctx) = $repo->command_output_pipe('ls-tree', @LSTREE_OPTS,
+ '--', @ARGV);
+
+print STDERR 'Using ', $nthreads, ' thread(s).', "\n" if $verbose;
+
+my $DataQueue = Thread::Queue->new();
+
+# start the threads
+for (my $i = 0; $i < $nthreads; $i++) {
+ ($thr[$i]) = threads->create(sub {
+ my $tid = threads->tid();
+ my %a;
+ while (my $f = $DataQueue->dequeue()) {
+ print STDERR "[$tid]Processing file: $f\n" if $verbose;
+ blame_file $repo, $ARGV[0], $f, \%a;
+ }
+ return %a;
+ });
+}
+
+# now queue up the files
+while (<$fh>) {
+ chomp;
+
+ if ($exclude_pattern && m/$exclude_pattern/o) {
+ print STDERR "Skipping file: $_\n" if $verbose;
+ next;
+ } else {
+ print STDERR "Queuing file: $_\n" if $verbose;
+ }
+
+ $DataQueue->enqueue($_);
+}
+$repo->command_close_pipe($fh, $ctx);
+
+# queue up an undef entry for each thread
+for (my $i = 0; $i < $nthreads; $i++) {
+ $DataQueue->enqueue(undef);
+}
+
+# merge the author hash from each thread
+for (my $i = 0; $i < $nthreads; $i++) {
+ my %th_authors = $thr[$i]->join;
+
+ foreach my $author (keys %th_authors) {
+ if (! exists $authors{$author}) {
+ $authors{$author} = $th_authors{$author};
+ next;
+ }
+ foreach my $filename (keys %{$th_authors{$author}}) {
+ if (! exists $authors{$author}->{$filename}) {
+ $authors{$author}->{$filename} =
+ $th_authors{$author}->{$filename};
+ } else {
+ $authors{$author}->{$filename} +=
+ $th_authors{$author}->{$filename};
+ }
+ }
+ }
+}
+
+
+if ($output_format == 0) {
+ print_long \%authors;
+} elsif ($output_format == 1) {
+ print_short \%authors;
+} elsif ($output_format == 2) {
+ print_longer \%authors;
+} elsif ($output_format == 3) {
+ print_with_file_percentage \%authors;
+} elsif ($output_format == 4) {
+ print_with_file_perspective \%authors;
+}
+
+printf "%6d total lines\n", count_total_lines(\%authors) if $show_total;
+
+exit;
--
1.7.3.1.45.g9855b
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