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Diffstat (limited to 'contrib/examples/git-difftool.perl')
| -rwxr-xr-x | contrib/examples/git-difftool.perl | 481 |
1 files changed, 0 insertions, 481 deletions
diff --git a/contrib/examples/git-difftool.perl b/contrib/examples/git-difftool.perl deleted file mode 100755 index df59bdfe97..0000000000 --- a/contrib/examples/git-difftool.perl +++ /dev/null @@ -1,481 +0,0 @@ -#!/usr/bin/perl -# Copyright (c) 2009, 2010 David Aguilar -# Copyright (c) 2012 Tim Henigan -# -# This is a wrapper around the GIT_EXTERNAL_DIFF-compatible -# git-difftool--helper script. -# -# This script exports GIT_EXTERNAL_DIFF and GIT_PAGER for use by git. -# The GIT_DIFF* variables are exported for use by git-difftool--helper. -# -# Any arguments that are unknown to this script are forwarded to 'git diff'. - -use 5.008; -use strict; -use warnings; -use Error qw(:try); -use File::Basename qw(dirname); -use File::Copy; -use File::Find; -use File::stat; -use File::Path qw(mkpath rmtree); -use File::Temp qw(tempdir); -use Getopt::Long qw(:config pass_through); -use Git; -use Git::I18N; - -sub usage -{ - my $exitcode = shift; - print << 'USAGE'; -usage: git difftool [-t|--tool=<tool>] [--tool-help] - [-x|--extcmd=<cmd>] - [-g|--gui] [--no-gui] - [--prompt] [-y|--no-prompt] - [-d|--dir-diff] - ['git diff' options] -USAGE - exit($exitcode); -} - -sub print_tool_help -{ - # See the comment at the bottom of file_diff() for the reason behind - # using system() followed by exit() instead of exec(). - my $rc = system(qw(git mergetool --tool-help=diff)); - exit($rc | ($rc >> 8)); -} - -sub exit_cleanup -{ - my ($tmpdir, $status) = @_; - my $errno = $!; - rmtree($tmpdir); - if ($status and $errno) { - my ($package, $file, $line) = caller(); - warn "$file line $line: $errno\n"; - } - exit($status | ($status >> 8)); -} - -sub use_wt_file -{ - my ($file, $sha1) = @_; - my $null_sha1 = '0' x 40; - - if (-l $file || ! -e _) { - return (0, $null_sha1); - } - - my $wt_sha1 = Git::command_oneline('hash-object', $file); - my $use = ($sha1 eq $null_sha1) || ($sha1 eq $wt_sha1); - return ($use, $wt_sha1); -} - -sub changed_files -{ - my ($repo_path, $index, $worktree) = @_; - $ENV{GIT_INDEX_FILE} = $index; - - my @gitargs = ('--git-dir', $repo_path, '--work-tree', $worktree); - my @refreshargs = ( - @gitargs, 'update-index', - '--really-refresh', '-q', '--unmerged'); - try { - Git::command_oneline(@refreshargs); - } catch Git::Error::Command with {}; - - my @diffargs = (@gitargs, 'diff-files', '--name-only', '-z'); - my $line = Git::command_oneline(@diffargs); - my @files; - if (defined $line) { - @files = split('\0', $line); - } else { - @files = (); - } - - delete($ENV{GIT_INDEX_FILE}); - - return map { $_ => 1 } @files; -} - -sub setup_dir_diff -{ - my ($worktree, $symlinks) = @_; - my @gitargs = ('diff', '--raw', '--no-abbrev', '-z', @ARGV); - my $diffrtn = Git::command_oneline(@gitargs); - exit(0) unless defined($diffrtn); - - # Go to the root of the worktree now that we've captured the list of - # changed files. The paths returned by diff --raw are relative to the - # top-level of the repository, but we defer changing directories so - # that @ARGV can perform pathspec limiting in the current directory. - chdir($worktree); - - # Build index info for left and right sides of the diff - my $submodule_mode = '160000'; - my $symlink_mode = '120000'; - my $null_mode = '0' x 6; - my $null_sha1 = '0' x 40; - my $lindex = ''; - my $rindex = ''; - my $wtindex = ''; - my %submodule; - my %symlink; - my @files = (); - my %working_tree_dups = (); - my @rawdiff = split('\0', $diffrtn); - - my $i = 0; - while ($i < $#rawdiff) { - if ($rawdiff[$i] =~ /^::/) { - warn __ <<'EOF'; -Combined diff formats ('-c' and '--cc') are not supported in -directory diff mode ('-d' and '--dir-diff'). -EOF - exit(1); - } - - my ($lmode, $rmode, $lsha1, $rsha1, $status) = - split(' ', substr($rawdiff[$i], 1)); - my $src_path = $rawdiff[$i + 1]; - my $dst_path; - - if ($status =~ /^[CR]/) { - $dst_path = $rawdiff[$i + 2]; - $i += 3; - } else { - $dst_path = $src_path; - $i += 2; - } - - if ($lmode eq $submodule_mode or $rmode eq $submodule_mode) { - $submodule{$src_path}{left} = $lsha1; - if ($lsha1 ne $rsha1) { - $submodule{$dst_path}{right} = $rsha1; - } else { - $submodule{$dst_path}{right} = "$rsha1-dirty"; - } - next; - } - - if ($lmode eq $symlink_mode) { - $symlink{$src_path}{left} = - Git::command_oneline('show', $lsha1); - } - - if ($rmode eq $symlink_mode) { - $symlink{$dst_path}{right} = - Git::command_oneline('show', $rsha1); - } - - if ($lmode ne $null_mode and $status !~ /^C/) { - $lindex .= "$lmode $lsha1\t$src_path\0"; - } - - if ($rmode ne $null_mode) { - # Avoid duplicate entries - if ($working_tree_dups{$dst_path}++) { - next; - } - my ($use, $wt_sha1) = - use_wt_file($dst_path, $rsha1); - if ($use) { - push @files, $dst_path; - $wtindex .= "$rmode $wt_sha1\t$dst_path\0"; - } else { - $rindex .= "$rmode $rsha1\t$dst_path\0"; - } - } - } - - # Go to the root of the worktree so that the left index files - # are properly setup -- the index is toplevel-relative. - chdir($worktree); - - # Setup temp directories - my $tmpdir = tempdir('git-difftool.XXXXX', CLEANUP => 0, TMPDIR => 1); - my $ldir = "$tmpdir/left"; - my $rdir = "$tmpdir/right"; - mkpath($ldir) or exit_cleanup($tmpdir, 1); - mkpath($rdir) or exit_cleanup($tmpdir, 1); - - # Populate the left and right directories based on each index file - my ($inpipe, $ctx); - $ENV{GIT_INDEX_FILE} = "$tmpdir/lindex"; - ($inpipe, $ctx) = - Git::command_input_pipe('update-index', '-z', '--index-info'); - print($inpipe $lindex); - Git::command_close_pipe($inpipe, $ctx); - - my $rc = system('git', 'checkout-index', '--all', "--prefix=$ldir/"); - exit_cleanup($tmpdir, $rc) if $rc != 0; - - $ENV{GIT_INDEX_FILE} = "$tmpdir/rindex"; - ($inpipe, $ctx) = - Git::command_input_pipe('update-index', '-z', '--index-info'); - print($inpipe $rindex); - Git::command_close_pipe($inpipe, $ctx); - - $rc = system('git', 'checkout-index', '--all', "--prefix=$rdir/"); - exit_cleanup($tmpdir, $rc) if $rc != 0; - - $ENV{GIT_INDEX_FILE} = "$tmpdir/wtindex"; - ($inpipe, $ctx) = - Git::command_input_pipe('update-index', '--info-only', '-z', '--index-info'); - print($inpipe $wtindex); - Git::command_close_pipe($inpipe, $ctx); - - # If $GIT_DIR was explicitly set just for the update/checkout - # commands, then it should be unset before continuing. - delete($ENV{GIT_INDEX_FILE}); - - # Changes in the working tree need special treatment since they are - # not part of the index. - for my $file (@files) { - my $dir = dirname($file); - unless (-d "$rdir/$dir") { - mkpath("$rdir/$dir") or - exit_cleanup($tmpdir, 1); - } - if ($symlinks) { - symlink("$worktree/$file", "$rdir/$file") or - exit_cleanup($tmpdir, 1); - } else { - copy($file, "$rdir/$file") or - exit_cleanup($tmpdir, 1); - - my $mode = stat($file)->mode; - chmod($mode, "$rdir/$file") or - exit_cleanup($tmpdir, 1); - } - } - - # Changes to submodules require special treatment. This loop writes a - # temporary file to both the left and right directories to show the - # change in the recorded SHA1 for the submodule. - for my $path (keys %submodule) { - my $ok = 0; - if (defined($submodule{$path}{left})) { - $ok = write_to_file("$ldir/$path", - "Subproject commit $submodule{$path}{left}"); - } - if (defined($submodule{$path}{right})) { - $ok = write_to_file("$rdir/$path", - "Subproject commit $submodule{$path}{right}"); - } - exit_cleanup($tmpdir, 1) if not $ok; - } - - # Symbolic links require special treatment. The standard "git diff" - # shows only the link itself, not the contents of the link target. - # This loop replicates that behavior. - for my $path (keys %symlink) { - my $ok = 0; - if (defined($symlink{$path}{left})) { - $ok = write_to_file("$ldir/$path", - $symlink{$path}{left}); - } - if (defined($symlink{$path}{right})) { - $ok = write_to_file("$rdir/$path", - $symlink{$path}{right}); - } - exit_cleanup($tmpdir, 1) if not $ok; - } - - return ($ldir, $rdir, $tmpdir, @files); -} - -sub write_to_file -{ - my $path = shift; - my $value = shift; - - # Make sure the path to the file exists - my $dir = dirname($path); - unless (-d "$dir") { - mkpath("$dir") or return 0; - } - - # If the file already exists in that location, delete it. This - # is required in the case of symbolic links. - unlink($path); - - open(my $fh, '>', $path) or return 0; - print($fh $value); - close($fh); - - return 1; -} - -sub main -{ - # parse command-line options. all unrecognized options and arguments - # are passed through to the 'git diff' command. - my %opts = ( - difftool_cmd => undef, - dirdiff => undef, - extcmd => undef, - gui => undef, - help => undef, - prompt => undef, - symlinks => $^O ne 'cygwin' && - $^O ne 'MSWin32' && $^O ne 'msys', - tool_help => undef, - trust_exit_code => undef, - ); - GetOptions('g|gui!' => \$opts{gui}, - 'd|dir-diff' => \$opts{dirdiff}, - 'h' => \$opts{help}, - 'prompt!' => \$opts{prompt}, - 'y' => sub { $opts{prompt} = 0; }, - 'symlinks' => \$opts{symlinks}, - 'no-symlinks' => sub { $opts{symlinks} = 0; }, - 't|tool:s' => \$opts{difftool_cmd}, - 'tool-help' => \$opts{tool_help}, - 'trust-exit-code' => \$opts{trust_exit_code}, - 'no-trust-exit-code' => sub { $opts{trust_exit_code} = 0; }, - 'x|extcmd:s' => \$opts{extcmd}); - - if (defined($opts{help})) { - usage(0); - } - if (defined($opts{tool_help})) { - print_tool_help(); - } - if (defined($opts{difftool_cmd})) { - if (length($opts{difftool_cmd}) > 0) { - $ENV{GIT_DIFF_TOOL} = $opts{difftool_cmd}; - } else { - print __("No <tool> given for --tool=<tool>\n"); - usage(1); - } - } - if (defined($opts{extcmd})) { - if (length($opts{extcmd}) > 0) { - $ENV{GIT_DIFFTOOL_EXTCMD} = $opts{extcmd}; - } else { - print __("No <cmd> given for --extcmd=<cmd>\n"); - usage(1); - } - } - if ($opts{gui}) { - my $guitool = Git::config('diff.guitool'); - if (defined($guitool) && length($guitool) > 0) { - $ENV{GIT_DIFF_TOOL} = $guitool; - } - } - - if (!defined $opts{trust_exit_code}) { - $opts{trust_exit_code} = Git::config_bool('difftool.trustExitCode'); - } - if ($opts{trust_exit_code}) { - $ENV{GIT_DIFFTOOL_TRUST_EXIT_CODE} = 'true'; - } else { - $ENV{GIT_DIFFTOOL_TRUST_EXIT_CODE} = 'false'; - } - - # In directory diff mode, 'git-difftool--helper' is called once - # to compare the a/b directories. In file diff mode, 'git diff' - # will invoke a separate instance of 'git-difftool--helper' for - # each file that changed. - if (defined($opts{dirdiff})) { - dir_diff($opts{extcmd}, $opts{symlinks}); - } else { - file_diff($opts{prompt}); - } -} - -sub dir_diff -{ - my ($extcmd, $symlinks) = @_; - my $rc; - my $error = 0; - my $repo = Git->repository(); - my $repo_path = $repo->repo_path(); - my $worktree = $repo->wc_path(); - $worktree =~ s|/$||; # Avoid double slashes in symlink targets - my ($a, $b, $tmpdir, @files) = setup_dir_diff($worktree, $symlinks); - - if (defined($extcmd)) { - $rc = system($extcmd, $a, $b); - } else { - $ENV{GIT_DIFFTOOL_DIRDIFF} = 'true'; - $rc = system('git', 'difftool--helper', $a, $b); - } - # If the diff including working copy files and those - # files were modified during the diff, then the changes - # should be copied back to the working tree. - # Do not copy back files when symlinks are used and the - # external tool did not replace the original link with a file. - # - # These hashes are loaded lazily since they aren't needed - # in the common case of --symlinks and the difftool updating - # files through the symlink. - my %wt_modified; - my %tmp_modified; - my $indices_loaded = 0; - - for my $file (@files) { - next if $symlinks && -l "$b/$file"; - next if ! -f "$b/$file"; - - if (!$indices_loaded) { - %wt_modified = changed_files( - $repo_path, "$tmpdir/wtindex", $worktree); - %tmp_modified = changed_files( - $repo_path, "$tmpdir/wtindex", $b); - $indices_loaded = 1; - } - - if (exists $wt_modified{$file} and exists $tmp_modified{$file}) { - warn sprintf(__( - "warning: Both files modified:\n" . - "'%s/%s' and '%s/%s'.\n" . - "warning: Working tree file has been left.\n" . - "warning:\n"), $worktree, $file, $b, $file); - $error = 1; - } elsif (exists $tmp_modified{$file}) { - my $mode = stat("$b/$file")->mode; - copy("$b/$file", $file) or - exit_cleanup($tmpdir, 1); - - chmod($mode, $file) or - exit_cleanup($tmpdir, 1); - } - } - if ($error) { - warn sprintf(__( - "warning: Temporary files exist in '%s'.\n" . - "warning: You may want to cleanup or recover these.\n"), $tmpdir); - exit(1); - } else { - exit_cleanup($tmpdir, $rc); - } -} - -sub file_diff -{ - my ($prompt) = @_; - - if (defined($prompt)) { - if ($prompt) { - $ENV{GIT_DIFFTOOL_PROMPT} = 'true'; - } else { - $ENV{GIT_DIFFTOOL_NO_PROMPT} = 'true'; - } - } - - $ENV{GIT_PAGER} = ''; - $ENV{GIT_EXTERNAL_DIFF} = 'git-difftool--helper'; - - # ActiveState Perl for Win32 does not implement POSIX semantics of - # exec* system call. It just spawns the given executable and finishes - # the starting program, exiting with code 0. - # system will at least catch the errors returned by git diff, - # allowing the caller of git difftool better handling of failures. - my $rc = system('git', 'diff', @ARGV); - exit($rc | ($rc >> 8)); -} - -main(); |