mirror of
https://github.com/git/git.git
synced 2024-11-18 15:03:53 +01:00
1b1dd23f2d
When you misuse a git command, you are shown the usage string. But this is currently shown in the dashed form. So if you just copy what you see, it will not work, when the dashed form is no longer supported. This patch makes git commands show the dash-less version. For shell scripts that do not specify OPTIONS_SPEC, git-sh-setup.sh generates a dash-less usage string now. Signed-off-by: Stephan Beyer <s-beyer@gmx.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
174 lines
4.0 KiB
Perl
Executable File
174 lines
4.0 KiB
Perl
Executable File
#!/usr/bin/env perl
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# Copyright 2005, Ryan Anderson <ryan@michonline.com>
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# Distribution permitted under the GPL v2, as distributed
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# by the Free Software Foundation.
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# Later versions of the GPL at the discretion of Linus Torvalds
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#
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# Scan two git object-trees, and hardlink any common objects between them.
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use 5.006;
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use strict;
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use warnings;
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use Getopt::Long;
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sub get_canonical_form($);
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sub do_scan_directory($$$);
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sub compare_two_files($$);
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sub usage();
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sub link_two_files($$);
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# stats
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my $total_linked = 0;
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my $total_already = 0;
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my ($linked,$already);
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my $fail_on_different_sizes = 0;
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my $help = 0;
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GetOptions("safe" => \$fail_on_different_sizes,
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"help" => \$help);
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usage() if $help;
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my (@dirs) = @ARGV;
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usage() if (!defined $dirs[0] || !defined $dirs[1]);
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$_ = get_canonical_form($_) foreach (@dirs);
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my $master_dir = pop @dirs;
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opendir(D,$master_dir . "objects/")
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or die "Failed to open $master_dir/objects/ : $!";
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my @hashdirs = grep { ($_ eq 'pack') || /^[0-9a-f]{2}$/ } readdir(D);
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foreach my $repo (@dirs) {
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$linked = 0;
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$already = 0;
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printf("Searching '%s' and '%s' for common objects and hardlinking them...\n",
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$master_dir,$repo);
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foreach my $hashdir (@hashdirs) {
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do_scan_directory($master_dir, $hashdir, $repo);
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}
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printf("Linked %d files, %d were already linked.\n",$linked, $already);
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$total_linked += $linked;
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$total_already += $already;
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}
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printf("Totals: Linked %d files, %d were already linked.\n",
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$total_linked, $total_already);
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sub do_scan_directory($$$) {
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my ($srcdir, $subdir, $dstdir) = @_;
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my $sfulldir = sprintf("%sobjects/%s/",$srcdir,$subdir);
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my $dfulldir = sprintf("%sobjects/%s/",$dstdir,$subdir);
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opendir(S,$sfulldir)
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or die "Failed to opendir $sfulldir: $!";
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foreach my $file (grep(!/\.{1,2}$/, readdir(S))) {
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my $sfilename = $sfulldir . $file;
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my $dfilename = $dfulldir . $file;
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compare_two_files($sfilename,$dfilename);
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}
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closedir(S);
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}
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sub compare_two_files($$) {
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my ($sfilename, $dfilename) = @_;
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# Perl's stat returns relevant information as follows:
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# 0 = dev number
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# 1 = inode number
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# 7 = size
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my @sstatinfo = stat($sfilename);
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my @dstatinfo = stat($dfilename);
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if (@sstatinfo == 0 && @dstatinfo == 0) {
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die sprintf("Stat of both %s and %s failed: %s\n",$sfilename, $dfilename, $!);
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} elsif (@dstatinfo == 0) {
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return;
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}
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if ( ($sstatinfo[0] == $dstatinfo[0]) &&
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($sstatinfo[1] != $dstatinfo[1])) {
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if ($sstatinfo[7] == $dstatinfo[7]) {
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link_two_files($sfilename, $dfilename);
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} else {
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my $err = sprintf("ERROR: File sizes are not the same, cannot relink %s to %s.\n",
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$sfilename, $dfilename);
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if ($fail_on_different_sizes) {
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die $err;
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} else {
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warn $err;
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}
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}
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} elsif ( ($sstatinfo[0] == $dstatinfo[0]) &&
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($sstatinfo[1] == $dstatinfo[1])) {
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$already++;
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}
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}
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sub get_canonical_form($) {
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my $dir = shift;
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my $original = $dir;
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die "$dir is not a directory." unless -d $dir;
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$dir .= "/" unless $dir =~ m#/$#;
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$dir .= ".git/" unless $dir =~ m#\.git/$#;
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die "$original does not have a .git/ subdirectory.\n" unless -d $dir;
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return $dir;
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}
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sub link_two_files($$) {
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my ($sfilename, $dfilename) = @_;
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my $tmpdname = sprintf("%s.old",$dfilename);
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rename($dfilename,$tmpdname)
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or die sprintf("Failure renaming %s to %s: %s",
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$dfilename, $tmpdname, $!);
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if (! link($sfilename,$dfilename)) {
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my $failtxt = "";
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unless (rename($tmpdname,$dfilename)) {
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$failtxt = sprintf(
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"Git Repository containing %s is probably corrupted, " .
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"please copy '%s' to '%s' to fix.\n",
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$tmpdname, $dfilename);
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}
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die sprintf("Failed to link %s to %s: %s\n%s" .
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$sfilename, $dfilename,
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$!, $dfilename, $failtxt);
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}
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unlink($tmpdname)
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or die sprintf("Unlink of %s failed: %s\n",
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$dfilename, $!);
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$linked++;
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}
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sub usage() {
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print("Usage: git relink [--safe] <dir> [<dir> ...] <master_dir> \n");
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print("All directories should contain a .git/objects/ subdirectory.\n");
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print("Options\n");
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print("\t--safe\t" .
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"Stops if two objects with the same hash exist but " .
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"have different sizes. Default is to warn and continue.\n");
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exit(1);
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}
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