git: change calling convention of safe_git to have named arguments

diff --git a/IkiWiki/Plugin/git.pm b/IkiWiki/Plugin/git.pm
index 58d23ce919484e7dd60b6afc7c3daf09315ed659..333b4ac87ca434c67fbd5960c24a5ba506b7991b 100644 (file)
--- a/IkiWiki/Plugin/git.pm
+++ b/IkiWiki/Plugin/git.pm
@@ -199,12 +199,12 @@ sub create_temp_working_dir ($$) {
        return $working;
 }
 
-sub safe_git (&@) {
+sub safe_git {
        # Start a child process safely without resorting to /bin/sh.
        # Returns command output (in list content) or success state
        # (in scalar context), or runs the specified data handler.
 
-       my ($error_handler, $data_handler, @cmdline) = @_;
+       my %params = @_;
 
        my $pid = open my $OUT, "-|";
 
@@ -221,7 +221,7 @@ sub safe_git (&@) {
                        chdir $git_dir_stack[0]
                            or error("cannot chdir to $git_dir_stack[0]: $!");
                }
-               exec @cmdline or error("Cannot exec '@cmdline': $!");
+               exec @{$params{cmdline}} or error("Cannot exec '@{$params{cmdline}}': $!");
        }
        # In parent.
 
@@ -236,24 +236,24 @@ sub safe_git (&@) {
 
                chomp;
 
-               if (! defined $data_handler) {
+               if (! defined $params{data_handler}) {
                        push @lines, $_;
                }
                else {
-                       last unless $data_handler->($_);
+                       last unless $params{data_handler}->($_);
                }
        }
 
        close $OUT;
 
-       $error_handler->("'@cmdline' failed: $!") if $? && $error_handler;
+       $params{error_handler}->("'@{$params{cmdline}}' failed: $!") if $? && $params{error_handler};
 
        return wantarray ? @lines : ($? == 0);
 }
 # Convenient wrappers.
-sub run_or_die ($@) { safe_git(\&error, undef, @_) }
-sub run_or_cry ($@) { safe_git(sub { warn @_ }, undef, @_) }
-sub run_or_non ($@) { safe_git(undef, undef, @_) }
+sub run_or_die ($@) { safe_git(error_handler => \&error, cmdline => \@_) }
+sub run_or_cry ($@) { safe_git(error_handler => sub { warn @_ }, cmdline => \@_) }
+sub run_or_non ($@) { safe_git(cmdline => \@_) }
 
 sub ensure_committer {
        if (! length $ENV{GIT_AUTHOR_NAME} || ! length $ENV{GIT_COMMITTER_NAME}) {
@@ -824,7 +824,11 @@ sub rcs_diff ($;$) {
                        if (@lines || $line=~/^diff --git/);
                return 1;
        };
-       safe_git(undef, $addlines, "git", "show", $sha1);
+       safe_git(
+               error_handler => undef,
+               data_handler => $addlines,
+               cmdline => ["git", "show", $sha1],
+       );
        if (wantarray) {
                return @lines;
        }