implemented mr config

diff --git a/TODO b/TODO
index 6621db6f90ed9718e838136757f22b7513b8360a..000d5abbe7376caa7ed5efb0b745aaa530835df0 100644 (file)
--- a/TODO
+++ b/TODO
@@ -18,7 +18,7 @@
   closest mrconfig file.
 
   mr register would be implemented as a shell command that then calls
-  mr config with flags that make it actually edit the mrconfig file:
+  mr config with flags that make it edit the mrconfig file:
 
   if [ -d "$MR_REPO/.svn" ]; then
        url=$(svn info "$MR_REPO" | grep -i ^URL: | cut -d ' ' -f 2)

diff --git a/mr b/mr
index 4243194e84b506e9f8caff635e8fe38c32e61ed5..235c17518ad546c868086b8dcb73e931d7c95794 100755 (executable)
--- a/mr
+++ b/mr
@@ -18,6 +18,8 @@ B<mr> [options] diff
 
 B<mr> [options] log
 
+B<mr> [options] config section [parameter=[value] ...]
+
 B<mr> [options] action [params ...]
 
 =head1 DESCRIPTION
@@ -74,6 +76,15 @@ Show the commit log.
 
 List the repositories that mr will act on.
 
+=item config
+
+Modifies the mrconfig file. The next parameter is the name of the section
+to add or modify, and it is followed by one or more instances of
+"parameter=value". Use "parameter=" to remove a parameter. For example,
+to register a new svn repository in src/foo:
+
+  mr config src/foo checkout="svn co svn://example.com/foo/trunk"
+
 =item help
 
 Displays this help.
@@ -250,6 +261,23 @@ if (! exists $knownactions{$action}) {
 if ($action eq 'help') {
        exec($config{''}{DEFAULT}{help});
 }
+elsif ($action eq 'config') {
+       if (@ARGV < 2) {
+               die "mr config: not enough parameters\n";
+       }
+       my $section=shift;
+       my %fields;
+       foreach (@ARGV) {
+               if (/^([^=]+)=(.*)$/) {
+                       $fields{$1}=$2;
+               }
+               else {
+                       die "mr config: expected parameter=value, not \"$_\"\n";
+               }
+       }
+       modifyconfig($config, $section, %fields);
+       exit 0;
+}
 
 # work out what repos to act on
 my @repos;
@@ -493,6 +521,85 @@ sub loadconfig {
        }
 }
 
+sub modifyconfig {
+       my $f=shift;
+       # the section to modify or add
+       my $targetsection=shift;
+       # fields to change in the section
+       # To remove a field, set its value to "".
+       my %changefields=@_;
+
+       my @lines;
+       if (-e $f) {
+               open(my $in, "<", $f) || die "mr: open $f: $!\n";
+               @lines=<$in>;
+               close $in;
+       }
+
+       my $section;
+       my @out;
+       while (@lines) {
+               $_=shift(@lines);
+
+               if (/^\s*\#/ || /^\s*$/) {
+                       push @out, $_;
+               }
+               elsif (/^\s*\[([^\]]*)\]\s*$/) {
+                       if (defined $section && 
+                           $section eq $targetsection) {
+                               my @blanks;
+                               while ($out[$#out] =~ /^\s*$/) {
+                                       unshift @blanks, pop @out;
+                               }
+                               foreach my $field (sort keys %changefields) {
+                                       if (length $changefields{$field}) {
+                                               push @out, "$field = $changefields{$field}\n";
+                                       }
+                               }
+                               push @out, @blanks;
+                       }
+
+                       $section=$1;
+
+                       push @out, $_;
+               }
+               elsif (/^\s*(\w+)\s*=\s(.*)/) {
+                       my $parameter=$1;
+                       my $value=$2;
+
+                       # continuation line
+                       while ($value=~/(.*\\)$/s) {
+                               $value=$1."\n".shift(@lines);
+                               chomp $value;
+                       }
+
+                       if ($section eq $targetsection) {
+                               if (exists $changefields{$parameter}) {
+                                       if (length $changefields{$parameter}) {
+                                               $value=$changefields{$parameter};
+                                       }
+                                       delete $changefields{$parameter};
+                               }
+                       }
+
+                       push @out, "$parameter = $value\n";
+               }
+       }
+
+       if (%changefields) {
+               push @out, "\n[$targetsection]\n";
+               foreach my $field (sort keys %changefields) {
+                       if (length $changefields{$field}) {
+                               push @out, "$field = $changefields{$field}\n";
+                       }
+               }
+       }
+
+       open(my $out, ">", $f) || die "mr: write $f: $!\n";
+       print $out @out;
+       close $out;     
+}
+
 # Finally, some useful actions that mr knows about by default.
 # These can be overridden in ~/.mrconfig.
 __DATA__
@@ -569,7 +676,7 @@ log =                                                       \
                error "unknown repo type"               \
        fi
 list = true
-
+config = 
 help =                                                 \
        if [ ! -e "$MR_PATH" ]; then                    \
                error "cannot find program path"        \