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authorMartin Langhoff <martin@catalyst.net.nz>2006-01-30 19:12:12 +1300
committerJunio C Hamano <junkio@cox.net>2006-01-29 23:25:41 -0800
commitd41df15e6913e8f7e1b5d656bb51dc4268232c36 (patch)
treedbf8fb3c485ba18760c89b61593a5f66e93605af /git-cvsexportcommit.perl
parent5179c8a54f76dcbdbfc96eed3a4e64a30d8d562d (diff)
downloadgit-d41df15e6913e8f7e1b5d656bb51dc4268232c36.tar.gz
exportcommit: replace backticks with safe_pipe_capture() or system() - initial pass
Replaced backticks with potentially troublesome unescaped input with safe_pipe_capture(). Signed-off-by: Martin Langhoff <martin@catalyst.net.nz> Signed-off-by: Junio C Hamano <junkio@cox.net>
Diffstat (limited to 'git-cvsexportcommit.perl')
-rwxr-xr-xgit-cvsexportcommit.perl53
1 files changed, 33 insertions, 20 deletions
diff --git a/git-cvsexportcommit.perl b/git-cvsexportcommit.perl
index d5fbee7ba0..7b3a3d323b 100755
--- a/git-cvsexportcommit.perl
+++ b/git-cvsexportcommit.perl
@@ -27,7 +27,7 @@ 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 $commit did not resolve!";
@@ -37,7 +37,7 @@ if ($?) {
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!";
@@ -45,7 +45,7 @@ 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
@@ -81,12 +81,12 @@ $opt_v && print "Applying to CVS commit $commit from parent $parent\n";
$? && die "Error extracting the commit message";
my (@afiles, @dfiles, @mfiles);
-my @files = `git-diff-tree -r $parent $commit`;
+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];
}
@@ -104,18 +104,19 @@ 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) {
- my $status = `cvs -q status "$f" | grep '^File: '`;
-
- unless ($status =~ m/Status: Unknown$/) {
- $dirty = 1;
+ # This should return only one value
+ my @status = grep(m/^File/, safe_pipe_capture('cvs', '-q', 'status' ,$f));
+ if (@status > 1) { warn 'Strange! cvs status returned more than one line?'};
+ unless ($status[0] =~ m/Status: Unknown$/) {
+ $dirty = 1;
warn "File $f is already known in your CVS checkout!\n";
}
}
foreach my $f (@mfiles, @dfiles) {
# TODO:we need to handle removed in cvs
- my $status = `cvs -q status "$f" | grep '^File: '`;
-
- unless ($status =~ m/Status: Up-to-date$/) {
+ 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 $f not up to date in your CVS checkout!\n";
}
@@ -132,18 +133,17 @@ if ($dirty) {
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} `;
+ 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', '-q', $f, "$tmpdir/blob")) {
warn "Binary file $f in CVS does not match parent.\n";
$dirty = 1;
next;
@@ -175,7 +175,7 @@ if (($? >> 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";
@@ -183,7 +183,7 @@ 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 $f -- you may need to do it manually";
@@ -204,7 +204,7 @@ if ($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";
@@ -224,10 +224,23 @@ 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 alterative 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);
+}