[RFC] gitweb: add 'historyfollow' view that follows renames
From: Blucher, Guy <hidden>
Date: 2016-06-15 22:45:32
Hi Folks,
quoted
What should we add to automatically get all file history?
While the 'commitdiff' view would, in default gitweb configuration, contain information about file renames, currently 'history' view does not support '--follow' option to git-log. It wouldn't be too hard to add it, but it just wasn't done (well, add to this the fact that --follow works only for simple cases).
We also ran up against this issue because renaming of files in our project is a useful bit of information while browsing file history. I hacked gitweb to add a 'historyfollow' viewing option in addition to the 'history' option. Yes, '--follow' is expensive so I didn't just make it the default 'history' behaviour. The only problem with doing it was that parse_commits in gitweb.perl uses git rev-list which doesn't support the '--follow' option like git-log does. A bit of hacking to use 'git log --pretty=raw -z' to make the output look close to that from rev-list means only minor shoe-horning is required (perhaps it would be better to make rev-list understand --follow though?). I wasn't originally prepared to publish the work here because I don't really think it's the best solution. But considering it's come up... I include a patch inline against gitweb.perl from v1.6.0.3 that implements a 'historyfollow' view. Feel free to do with it what you will. It would need some substantial tidying up by someone who knows much more about perl than me :) We use it such that anywhere a 'history' link is provided a 'historyfollow' link is also provided next to it - This patch doesn't implement that bit though. Hope it helps. Cheers, Guy. ---
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl@@ -478,6 +478,7 @@ my %actions = ( "forks" => \&git_forks, "heads" => \&git_heads, "history" => \&git_history, + "historyfollow" => \&git_history_follow, "log" => \&git_log, "rss" => \&git_rss, "atom" => \&git_atom,
@@ -2311,25 +2312,39 @@ sub parse_commit { } sub parse_commits { - my ($commit_id, $maxcount, $skip, $filename, @args) = @_; + my ($commit_id, $maxcount, $skip, $mode, $filename, @args) = @_; my @cos; $maxcount ||= 1; $skip ||= 0; local $/ = "\0"; + # The '--max-count' argument is not available when doing a + # '--follow' to 'git log' + my $count_arg = ("--max-count=" . $maxcount) ; + if (defined $mode && $mode eq "--follow") { + $count_arg = "--follow" ; + } - open my $fd, "-|", git_cmd(), "rev-list", - "--header", + + open my $fd, "-|", git_cmd(), "log", + "-z", + "--pretty=raw", @args, - ("--max-count=" . $maxcount), + ($count_arg ? ($count_arg ) : ()), ("--skip=" . $skip), @extra_options, $commit_id, "--", ($filename ? ($filename) : ()) - or die_error(500, "Open git-rev-list failed"); + or die_error(500, "Open git-log failed"); while (my $line = <$fd>) { + # Need to put a delimiter on the end of output + # 'git-log -z' doesn't put one before EOF like rev-list
does
+ $line = ($line . '\0');
+ # Need to strip the word commit from the start so it
+ # looks like rev-list output
+ $line =~ s/^commit // ;
my %co = parse_commit_text($line);
push @cos, \%co;
}@@ -5363,6 +5378,13 @@ sub git_commitdiff_plain { } sub git_history { + my $mode = shift || ''; + my $history_call = "history"; + + if ($mode eq "--follow") { + $history_call .= "historyfollow" ; + } + if (!defined $hash_base) { $hash_base = git_get_head_hash($project); }
@@ -5377,7 +5399,7 @@ sub git_history { my $limit = sprintf("--max-count=%i", (100 * ($page+1))); my @commitlist = parse_commits($hash_base, 101, (100 * $page), - $file_name, "--full-history") + $mode, $file_name,
"--full-history")
or die_error(404, "No such file or directory on given
branch");
if (!defined $hash && defined $file_name) {@@ -5398,7 +5420,7 @@ sub git_history { my $paging_nav = ''; if ($page > 0) { $paging_nav .= - $cgi->a({-href => href(action=>"history",
hash=>$hash, hash_base=>$hash_base,
+ $cgi->a({-href => href(action=>"$history_call",
hash=>$hash, hash_base=>$hash_base,
file_name=>$file_name)},
"first");
$paging_nav .= " ⋅ " .@@ -5429,6 +5451,11 @@ sub git_history { git_footer_html(); } +sub git_history_follow { + git_history('--follow'); +} + + sub git_search { gitweb_check_feature('search') or die_error(403, "Search is
disabled");
if (!defined $searchtext) {@@ -5469,7 +5496,7 @@ sub git_search { $greptype = "--committer="; } $greptype .= $searchtext; - my @commitlist = parse_commits($hash, 101, (100 *
$page), undef,
+ my @commitlist = parse_commits($hash, 101, (100 *
$page), undef, undef,
$greptype,
'--regexp-ignore-case',
$search_use_regexp ?
'--extended-regexp' : '--fixed-strings');
@@ -5737,7 +5764,7 @@ sub git_feed { # log/feed of current (HEAD) branch, log of given branch,
history of file/directory
my $head = $hash || 'HEAD';
- my @commitlist = parse_commits($head, 150, 0, $file_name);
+ my @commitlist = parse_commits($head, 150, 0, undef,
$file_name);
my %latest_commit;
my %latest_date;
---
Guy.
____________________________________________________
Guy Blucher
Defence Science and Technology Organisation
AUSTRALIA
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