X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=git-cvsexportcommit.perl;h=99b3dc392afdd5ffb3e2aa8f6fe6b484c2e2f1fe;hb=a2a3bf7b2baf0ff64c5b5ffc78d54be82d9967f1;hp=5a8c011802c46356c9c842282baca8f6fb54f01b;hpb=5e80092f7e6db09a40a62e837ca3f74f0bc5ad73;p=git.git

diff --git a/git-cvsexportcommit.perl b/git-cvsexportcommit.perl
index 5a8c01180..99b3dc392 100755
--- a/git-cvsexportcommit.perl
+++ b/git-cvsexportcommit.perl
@@ -1,18 +1,24 @@
 #!/usr/bin/perl -w
 
+# Known limitations:
+# - cannot add or remove binary files
+# - does not propagate permissions
+# - tells "ready for commit" even when things could not be completed
+#   (eg addition of a binary file)
+
 use strict;
 use Getopt::Std;
 use File::Temp qw(tempdir);
 use Data::Dumper;
-use File::Basename qw(basename);
+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_v, $opt_c );
+our ($opt_h, $opt_p, $opt_v, $opt_c, $opt_f, $opt_a, $opt_m );
 
-getopts('hpvc');
+getopts('hpvcfam:');
 
 $opt_h && usage();
 
@@ -23,11 +29,10 @@ our ($tmpdir, $tmpdirname) = tempdir('git-cvsapplycommit-XXXXXX',
 				     TMPDIR => 1,
 				     CLEANUP => 1);
 
-print Dumper(@ARGV);
 # resolve target commit
 my $commit;
 $commit = pop @ARGV;
-$commit = `git-rev-parse --verify "$commit"^0`;
+$commit = safe_pipe_capture('git-rev-parse', '--verify', "$commit^0");
 chomp $commit;
 if ($?) {
     die "The commit reference $commit did not resolve!";
@@ -37,7 +42,7 @@ if ($?) {
 my $parent;
 if (@ARGV) {
     $parent = pop @ARGV;
-    $parent =  `git-rev-parse --verify "$parent"^0"`;
+    $parent =  safe_pipe_capture('git-rev-parse', '--verify', "$parent^0");
     chomp $parent;
     if ($?) {
 	die "The parent reference did not resolve!";
@@ -45,27 +50,47 @@ if (@ARGV) {
 }
 
 # find parents from the commit itself
-my @commit  = `git-cat-file commit $commit`;
+my @commit  = safe_pipe_capture('git-cat-file', 'commit', $commit);
 my @parents;
-foreach my $p (@commit) {
-    if ($p =~ m/^$/) { # end of commit headers, we're done
-	last;
+my $committer;
+my $author;
+my $stage = 'headers'; # headers, msg
+my $title;
+my $msg = '';
+
+foreach my $line (@commit) {
+    chomp $line;
+    if ($stage eq 'headers' && $line eq '') {
+	$stage = 'msg';
+	next;
     }
-    if ($p =~ m/^parent (\w{40})$/) { # found a parent
-	push @parents, $1;
+
+    if ($stage eq 'headers') {
+	if ($line =~ m/^parent (\w{40})$/) { # found a parent
+	    push @parents, $1;
+	} elsif ($line =~ m/^author (.+) \d+ \+\d+$/) {
+	    $author = $1;
+	} elsif ($line =~ m/^committer (.+) \d+ \+\d+$/) {
+	    $committer = $1;
+	}
+    } else {
+	$msg .= $line . "\n";
+	unless ($title) {
+	    $title = $line;
+	}
     }
 }
 
 if ($parent) {
+    my $found;
     # double check that it's a valid parent
     foreach my $p (@parents) {
-	my $found;
 	if ($p eq $parent) {
 	    $found = 1;
 	    last;
 	}; # found it
-	die "Did not find $parent in the parents for this commit!";
     }
+    die "Did not find $parent in the parents for this commit!" if !$found;
 } else { # we don't have a parent from the cmdline...
     if (@parents == 1) { # it's safe to get it from the commit
 	$parent = $parents[0];
@@ -77,18 +102,35 @@ if ($parent) {
 $opt_v && print "Applying to CVS commit $commit from parent $parent\n";
 
 # grab the commit message
-`git-cat-file commit $commit | sed -e '1,/^\$/d' > .msg`;
-$? && die "Error extracting the commit message";
+open(MSG, ">.msg") or die "Cannot open .msg for writing";
+if ($opt_m) {
+    print MSG $opt_m;
+}
+print MSG $msg;
+if ($opt_a) {
+    print MSG "\n\nAuthor: $author\n";
+    if ($author ne $committer) {
+	print MSG "Committer: $committer\n";
+    }
+}
+close MSG;
 
-my (@afiles, @dfiles, @mfiles);
-my @files = `git-diff-tree -r $parent $commit`;
-print @files;
+my (@afiles, @dfiles, @mfiles, @dirs);
+my @files = safe_pipe_capture('git-diff-tree', '-r', $parent, $commit);
+#print @files;
 $? && die "Error in git-diff-tree";
 foreach my $f (@files) {
     chomp $f;
-    my @fields = split(m/\s+/, $f);
+    my @fields = split(m!\s+!, $f);
     if ($fields[4] eq 'A') {
-	push @afiles, $fields[5];
+        my $path = $fields[5];
+	push @afiles, $path;
+        # add any needed parent directories
+	$path = dirname $path;
+	while (!-d $path and ! grep { $_ eq $path } @dirs) {
+	    unshift @dirs, $path;
+	    $path = dirname $path;
+	}
     }
     if ($fields[4] eq 'M') {
 	push @mfiles, $fields[5];
@@ -103,17 +145,38 @@ undef @files; # don't need it anymore
 
 # check that the files are clean and up to date according to cvs
 my $dirty;
-foreach my $f (@afiles, @mfiles, @dfiles) {
-    # TODO:we need to handle removed in cvs and/or new (from git) 
-    my $status = `cvs -q status "$f" | grep '^File: '`;
-
-    unless ($status =~ m/Status: Up-to-date$/) {
+foreach my $d (@dirs) {
+    if (-e $d) {
+	$dirty = 1;
+	warn "$d exists and is not a directory!\n";
+    }
+}
+foreach my $f (@afiles) {
+    # This should return only one value
+    my @status = grep(m/^File/,  safe_pipe_capture('cvs', '-q', 'status' ,$f));
+    if (@status > 1) { warn 'Strange! cvs status returned more than one line?'};
+    if (-d dirname $f and $status[0] !~ m/Status: Unknown$/
+	and $status[0] !~ m/^File: no file /) {
+ 	$dirty = 1;
+	warn "File $f is already known in your CVS checkout -- perhaps it has been added by another user. Or this may indicate that it exists on a different branch. If this is the case, use -f to force the merge.\n";
+	warn "Status was: $status[0]\n";
+    }
+}
+foreach my $f (@mfiles, @dfiles) {
+    # TODO:we need to handle removed in cvs
+    my @status = grep(m/^File/,  safe_pipe_capture('cvs', '-q', 'status' ,$f));
+    if (@status > 1) { warn 'Strange! cvs status returned more than one line?'};
+    unless ($status[0] =~ m/Status: Up-to-date$/) {
 	$dirty = 1;
 	warn "File $f not up to date in your CVS checkout!\n";
     }
 }
 if ($dirty) {
-    die "Exiting: your CVS tree is not clean for this merge.";
+    if ($opt_f) {	warn "The tree is not clean -- forced merge\n";
+	$dirty = 0;
+    } else {
+	die "Exiting: your CVS tree is not clean for this merge.";
+    }
 }
 
 ###
@@ -122,20 +185,32 @@ if ($dirty) {
 ###
 
 
+print "Creating new directories\n";
+foreach my $d (@dirs) {
+    unless (mkdir $d) {
+        warn "Could not mkdir $d: $!";
+	$dirty = 1;
+    }
+    `cvs add $d`;
+    if ($?) {
+	$dirty = 1;
+	warn "Failed to cvs add directory $d -- you may need to do it manually";
+    }
+}
+
 print "'Patching' binary files\n";
 
-my @bfiles = `git-diff-tree -p $parent $commit | grep '^Binary'`;
+my @bfiles = grep(m/^Binary/, safe_pipe_capture('git-diff-tree', '-p', $parent, $commit));
 @bfiles = map { chomp } @bfiles;
 foreach my $f (@bfiles) {
     # check that the file in cvs matches the "old" file
-    # extract the file to $tmpdir and comparre with cmp
-    my $tree = `git-rev-parse $parent^{tree} `;
+    # extract the file to $tmpdir and compare with cmp
+    my $tree = safe_pipe_capture('git-rev-parse', "$parent^{tree}");
     chomp $tree;
     my $blob = `git-ls-tree $tree "$f" | cut -f 1 | cut -d ' ' -f 3`;
     chomp $blob;
     `git-cat-file blob $blob > $tmpdir/blob`;
-    `cmp -q $f $tmpdir/blob`;
-    if ($?) {
+    if (system('cmp', '-s', $f, "$tmpdir/blob")) {
 	warn "Binary file $f in CVS does not match parent.\n";
 	$dirty = 1;
 	next;
@@ -167,7 +242,7 @@ if (($? >> 8) == 2) {
 }
 
 foreach my $f (@afiles) {
-    `cvs add $f`;
+    system('cvs', 'add', $f);
     if ($?) {
 	$dirty = 1;
 	warn "Failed to cvs add $f -- you may need to do it manually";
@@ -175,7 +250,7 @@ foreach my $f (@afiles) {
 }
 
 foreach my $f (@dfiles) {
-    `cvs rm -f $f`;
+    system('cvs', 'rm', '-f', $f);
     if ($?) {
 	$dirty = 1;
 	warn "Failed to cvs rm -f $f -- you may need to do it manually";
@@ -183,6 +258,7 @@ foreach my $f (@dfiles) {
 }
 
 print "Commit to CVS\n";
+print "Patch: $title\n";
 my $commitfiles = join(' ', @afiles, @mfiles, @dfiles);
 my $cmd = "cvs commit -F .msg $commitfiles";
 
@@ -196,7 +272,7 @@ if ($dirtypatch) {
 
 if ($opt_c) {
     print "Autocommit\n  $cmd\n";
-    print `cvs commit -F .msg $commitfiles 2>&1`;
+    print safe_pipe_capture('cvs', 'commit', '-F', '.msg', @afiles, @mfiles, @dfiles);
     if ($?) {
 	cleanupcvs(@files);
 	die "Exiting: The commit did not succeed";
@@ -207,7 +283,7 @@ if ($opt_c) {
 }
 sub usage {
 	print STDERR <<END;
-Usage: GIT_DIR=/path/to/.git ${\basename $0} [-h] [-p] [-v] [-c] [ parent ] commit
+Usage: GIT_DIR=/path/to/.git ${\basename $0} [-h] [-p] [-v] [-c] [-f] [-m msgprefix] [ parent ] commit
 END
 	exit(1);
 }
@@ -216,10 +292,23 @@ END
 sub cleanupcvs {
     my @files = @_;
     foreach my $f (@files) {
-	`cvs -q update -C "$f"`;
+	system('cvs', '-q', 'update', '-C', $f);
 	if ($?) {
 	    warn "Warning! Failed to cleanup state of $f\n";
 	}
     }
 }
 
+# An alternative to `command` that allows input to be passed as an array
+# to work around shell problems with weird characters in arguments
+# if the exec returns non-zero we die
+sub safe_pipe_capture {
+    my @output;
+    if (my $pid = open my $child, '-|') {
+	@output = (<$child>);
+	close $child or die join(' ',@_).": $! $?";
+    } else {
+	exec(@_) or die "$! $?"; # exec() can fail the executable can't be found
+    }
+    return wantarray ? @output : join('',@output);
+}