X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;ds=sidebyside;f=git-cvsexportcommit.perl;h=d2e50c34292bc0ccb6e914ed595da9fd8a7e141d;hb=a41acc63badf20cbb22cca61039dca9309deaa19;hp=a33fa8d4c86da54a4d741cf921d1cf7b2138d186;hpb=c576304d512df18fa30b91bb3ac15478d5d4dfb1;p=git.git diff --git a/git-cvsexportcommit.perl b/git-cvsexportcommit.perl index a33fa8d4c..d2e50c342 100755 --- a/git-cvsexportcommit.perl +++ b/git-cvsexportcommit.perl @@ -1,28 +1,42 @@ #!/usr/bin/perl -w -# Known limitations: -# - does not propagate permissions -# - error handling has not been extensively tested -# - use strict; use Getopt::Std; use File::Temp qw(tempdir); use Data::Dumper; use File::Basename qw(basename dirname); -unless ($ENV{GIT_DIR} && -r $ENV{GIT_DIR}){ - die "GIT_DIR is not defined or is unreadable"; -} - -our ($opt_h, $opt_P, $opt_p, $opt_v, $opt_c, $opt_f, $opt_a, $opt_m, $opt_d, $opt_u); +our ($opt_h, $opt_P, $opt_p, $opt_v, $opt_c, $opt_f, $opt_a, $opt_m, $opt_d, $opt_u, $opt_w); -getopts('uhPpvcfam:d:'); +getopts('uhPpvcfam:d:w:'); $opt_h && usage(); die "Need at least one commit identifier!" unless @ARGV; +if ($opt_w) { + unless ($ENV{GIT_DIR}) { + # Remember where our GIT_DIR is before changing to CVS checkout + my $gd =`git-rev-parse --git-dir`; + chomp($gd); + if ($gd eq '.git') { + my $wd = `pwd`; + chomp($wd); + $gd = $wd."/.git" ; + } + $ENV{GIT_DIR} = $gd; + } + + if (! -d $opt_w."/CVS" ) { + die "$opt_w is not a CVS checkout"; + } + chdir $opt_w or die "Cannot change to CVS checkout at $opt_w"; +} +unless ($ENV{GIT_DIR} && -r $ENV{GIT_DIR}){ + die "GIT_DIR is not defined or is unreadable"; +} + + my @cvs; if ($opt_d) { @cvs = ('cvs', '-d', $opt_d); @@ -30,11 +44,6 @@ if ($opt_d) { @cvs = ('cvs'); } -# setup a tempdir -our ($tmpdir, $tmpdirname) = tempdir('git-cvsapplycommit-XXXXXX', - TMPDIR => 1, - CLEANUP => 1); - # resolve target commit my $commit; $commit = pop @ARGV; @@ -87,6 +96,7 @@ foreach my $line (@commit) { } } +my $noparent = "0000000000000000000000000000000000000000"; if ($parent) { my $found; # double check that it's a valid parent @@ -100,8 +110,10 @@ if ($parent) { } else { # we don't have a parent from the cmdline... if (@parents == 1) { # it's safe to get it from the commit $parent = $parents[0]; - } else { # or perhaps not! - die "This commit has more than one parent -- please name the parent you want to use explicitly"; + } elsif (@parents == 0) { # there is no parent + $parent = $noparent; + } else { # cannot choose automatically from multiple parents + die "This commit has more than one parent -- please name the parent you want to use explicitly"; } } @@ -121,7 +133,11 @@ if ($opt_a) { } close MSG; -`git-diff-tree --binary -p $parent $commit >.cvsexportcommit.diff`;# || die "Cannot diff"; +if ($parent eq $noparent) { + `git-diff-tree --binary -p --root $commit >.cvsexportcommit.diff`;# || die "Cannot diff"; +} else { + `git-diff-tree --binary -p $parent $commit >.cvsexportcommit.diff`;# || die "Cannot diff"; +} ## apply non-binary changes @@ -134,7 +150,7 @@ my $context = $opt_p ? '' : '-C1'; print "Checking if patch will apply\n"; my @stat; -open APPLY, "GIT_DIR= git-apply $context --binary --summary --numstat<.cvsexportcommit.diff|" || die "cannot patch"; +open APPLY, "GIT_DIR= git-apply $context --summary --numstat<.cvsexportcommit.diff|" || die "cannot patch"; @stat=; close APPLY || die "Cannot patch"; my (@bfiles,@files,@afiles,@dfiles); @@ -179,11 +195,11 @@ foreach my $f (@files) { my %cvsstat; if (@canstatusfiles) { if ($opt_u) { - my @updated = safe_pipe_capture(@cvs, 'update', @canstatusfiles); + my @updated = xargs_safe_pipe_capture([@cvs, 'update'], @canstatusfiles); print @updated; } my @cvsoutput; - @cvsoutput= safe_pipe_capture(@cvs, 'status', @canstatusfiles); + @cvsoutput = xargs_safe_pipe_capture([@cvs, 'status'], @canstatusfiles); my $matchcount = 0; foreach my $l (@cvsoutput) { chomp $l; @@ -220,10 +236,21 @@ if ($dirty) { } print "Applying\n"; -`GIT_DIR= git-apply $context --binary --summary --numstat --apply <.cvsexportcommit.diff` || die "cannot patch"; +`GIT_DIR= git-apply $context --summary --numstat --apply <.cvsexportcommit.diff` || die "cannot patch"; print "Patch applied successfully. Adding new files and directories to CVS\n"; my $dirtypatch = 0; + +# +# We have to add the directories in order otherwise we will have +# problems when we try and add the sub-directory of a directory we +# have not added yet. +# +# Luckily this is easy to deal with by sorting the directories and +# dealing with the shortest ones first. +# +@dirs = sort { length $a <=> length $b} @dirs; + foreach my $d (@dirs) { if (system(@cvs,'add',$d)) { $dirtypatch = 1; @@ -261,13 +288,14 @@ if ($dirtypatch) { print "You'll need to apply the patch in .cvsexportcommit.diff manually\n"; print "using a patch program. After applying the patch and resolving the\n"; print "problems you may commit using:"; + print "\n cd \"$opt_w\"" if $opt_w; print "\n $cmd\n\n"; exit(1); } if ($opt_c) { print "Autocommit\n $cmd\n"; - print safe_pipe_capture(@cvs, 'commit', '-F', '.msg', @files); + print xargs_safe_pipe_capture([@cvs, 'commit', '-F', '.msg'], @files); if ($?) { die "Exiting: The commit did not succeed"; } @@ -288,7 +316,7 @@ sleep(1); sub usage { print STDERR <); - close $child or die join(' ',@_).": $! $?"; - } else { - exec(@_) or die "$! $?"; # exec() can fail the executable can't be found - } - return $output; +sub xargs_safe_pipe_capture { + my $MAX_ARG_LENGTH = 65536; + my $cmd = shift; + my @output; + my $output; + while(@_) { + my @args; + my $length = 0; + while(@_ && $length < $MAX_ARG_LENGTH) { + push @args, shift; + $length += length($args[$#args]); + } + if (wantarray) { + push @output, safe_pipe_capture(@$cmd, @args); + } + else { + $output .= safe_pipe_capture(@$cmd, @args); + } + } + return wantarray ? @output : $output; }