add support for getting config settings

[code/myrepos.git] / mr

diff --git a/mr b/mr
index bed4cacf13dfd52ed95b3a0f4e031c42b108910f..db209d27c38409b4dfdc09ba93cb7e85a96bbc00 100755 (executable)
--- a/mr
+++ b/mr
@@ -18,6 +18,10 @@ B<mr> [options] diff
 
 B<mr> [options] log
 
 
 B<mr> [options] log
 

+B<mr> [options] register [repository]
+
+B<mr> [options] config section [parameter=[value] ...]
+

 B<mr> [options] action [params ...]
 
 =head1 DESCRIPTION
 B<mr> [options] action [params ...]
 
 =head1 DESCRIPTION


@@ -74,6 +78,24 @@ Show the commit log.
 
 List the repositories that mr will act on.
 
 
 List the repositories that mr will act on.
 

+=item register
+
+Register an existing repository in the mrconfig file. By default, the
+epository in the current directory is registered, or you can specify a
+directory to register.
+
+=item config
+
+Adds, modifies, removed, or prints a value from the mrconfig file. The next
+parameter is the name of the section the value is in. To add or modify a
+value, follow it by one or more instances of "parameter=value". Use
+"parameter=" to remove a parameter. Use just "parameter" to get the value
+of a parameter.
+
+For example, to add (or edit) a repository in src/foo:
+
+  mr config src/foo checkout="svn co svn://example.com/foo/trunk foo"
+

 =item help
 
 Displays this help.
 =item help
 
 Displays this help.


@@ -84,10 +106,10 @@ Actions can be abbreviated to any unambiguous subsctring, so
 "mr st" is equivilant to "mr status", and "mr up" is equivilant to "mr
 update"
 
 "mr st" is equivilant to "mr status", and "mr up" is equivilant to "mr
 update"
 

-Additional parameters can be passed to other commands than "commit", they
-will be passed on unchanged to the underlying revision control system.
-This is mostly useful if the repositories mr will act on all use the same
-revision control system.
+Additional parameters can be passed to most commands, and are passed on
+unchanged to the underlying revision control system. This is mostly useful
+if the repositories mr will act on all use the same revision control
+system.

 
 =head1 OPTIONS
 
 
 =head1 OPTIONS
 


@@ -166,6 +188,14 @@ If the "chain" parameter is set and its command returns nonzero, then B<mr>
 will try to load a .mrconfig file from the root of the repository. (You
 should avoid chaining from repositories with untrusted committers.)
 
 will try to load a .mrconfig file from the root of the repository. (You
 should avoid chaining from repositories with untrusted committers.)
 

+=item deleted
+
+If the "deleted" parameter is set and its command returns nonzero, then
+B<mr> will treat the repository as deleted. It won't ever actually delete
+the repository, but it will warn if it sees the repsoitory's directory.
+This is useful when one mrconfig file is shared amoung multiple machines,
+to keep track of and remember to delete old repositories.
+

 =item lib
 
 The "lib" parameter can specify some shell code that will be run before each
 =item lib
 
 The "lib" parameter can specify some shell code that will be run before each


@@ -240,7 +270,43 @@ if (! exists $knownactions{$action}) {
 }
 
 if ($action eq 'help') {
 }
 
 if ($action eq 'help') {

-       exec($config{''}{DEFAULT}{help});
+       exec($config{''}{DEFAULT}{$action}) || die "exec: $!";
+}
+elsif ($action eq 'config') {
+       if (@ARGV < 2) {
+               die "mr config: not enough parameters\n";
+       }
+       my $section=shift;
+       if ($section=~/^\//) {
+               # try to convert to a path relative to $config's dir
+               my ($dir)=$config=~/^(.*\/)[^\/]+$/;
+               if ($section=~/^\Q$dir\E(.*)/) {
+                       $section=$1;
+               }
+       }
+       my %changefields;
+       foreach (@ARGV) {
+               if (/^([^=]+)=(.*)$/) {
+                       $changefields{$1}=$2;
+               }
+               else {
+                       foreach my $topdir (sort keys %config) {
+                               if (exists $config{$topdir}{$section} &&
+                                   exists $config{$topdir}{$section}{$_}) {
+                                       print $config{$topdir}{$section}{$_}."\n";
+                               }
+                       }
+               }
+       }
+       modifyconfig($config, $section, %changefields) if %changefields;
+       exit 0;
+}
+elsif ($action eq 'register') {
+       my $command="set -e; ".$config{''}{DEFAULT}{lib}."\n".
+               "my_action(){ $config{''}{DEFAULT}{$action}\n }; my_action ".
+               join(" ", map { s/\//\/\//g; s/"/\"/g; '"'.$_.'"' } @ARGV);
+       print STDERR "mr $action: running >>$command<<\n" if $verbose;
+       exec($command) || die "exec: $!";

 }
 
 # work out what repos to act on
 }
 
 # work out what repos to act on


@@ -286,6 +352,22 @@ sub action {
        my $lib= exists $config{$topdir}{$subdir}{lib} ?
                        $config{$topdir}{$subdir}{lib}."\n" : "";
 
        my $lib= exists $config{$topdir}{$subdir}{lib} ?
                        $config{$topdir}{$subdir}{lib}."\n" : "";
 

+       if (exists $config{$topdir}{$subdir}{deleted}) {
+               if (! -d $dir) {
+                       return;
+               }
+               else {
+                       my $test="set -e;".$lib.$config{$topdir}{$subdir}{deleted};
+                       print "mr $action: running deleted test >>$test<<\n" if $verbose;
+                       my $ret=system($test);
+                       if ($ret >> 8 == 0) {
+                               print STDERR "mr error: $dir should be deleted yet still exists\n\n";
+                               push @failed, $dir;
+                               return;
+                       }
+               }
+       }
+

        if ($action eq 'checkout') {
                if (-d $dir) {
                        print "mr $action: $dir already exists, skipping checkout\n" if $verbose;
        if ($action eq 'checkout') {
                if (-d $dir) {
                        print "mr $action: $dir already exists, skipping checkout\n" if $verbose;


@@ -389,7 +471,10 @@ sub loadconfig {
                $dir="";
        }
        else {
                $dir="";
        }
        else {

-               # $f might be a symlink
+               if (! -e $f) {
+                       return;
+               }
+

                my $absf=abs_path($f);
                if ($loaded{$absf}) {
                        return;
                my $absf=abs_path($f);
                if ($loaded{$absf}) {
                        return;


@@ -469,6 +554,94 @@ 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;
+       my @out;
+
+       if (-e $f) {
+               open(my $in, "<", $f) || die "mr: open $f: $!\n";
+               @lines=<$in>;
+               close $in;
+       }
+
+       my $addfields=sub {
+               my @blanks;
+               while ($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;
+       };
+
+       my $section;
+       while (@lines) {
+               $_=shift(@lines);
+
+               if (/^\s*\#/ || /^\s*$/) {
+                       push @out, $_;
+               }
+               elsif (/^\s*\[([^\]]*)\]\s*$/) {
+                       if (defined $section && 
+                           $section eq $targetsection) {
+                               $addfields->();
+                       }
+
+                       $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 (defined $section && 
+           $section eq $targetsection) {
+                       $addfields->();
+       }
+       elsif (%changefields) {
+               push @out, "\n[$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__
 # Finally, some useful actions that mr knows about by default.
 # These can be overridden in ~/.mrconfig.
 __DATA__


@@ -544,8 +717,38 @@ log =                                                      \
        else                                            \
                error "unknown repo type"               \
        fi
        else                                            \
                error "unknown repo type"               \
        fi

+register =                                                             \
+       if [ -n "$1" ]; then                                            \
+               cd "$1"                                                 \
+       fi                                                              \
+       basedir="$(basename $(pwd))"                                    \
+       if [ -d .svn ]; then                                            \
+               url=$(LANG=C svn info . |                               \
+                     grep -i ^URL: | cut -d ' ' -f 2)                  \
+               if [ -z "$url" ]; then                                  \
+                       error "cannot determine svn url"                \
+               fi                                                      \
+               echo "Registering svn url: $url"                        \
+               mr config "$(pwd)" checkout="svn co $url $basedir"      \
+       elif [ -d .git ]; then                                          \
+               url=$(LANG=C git-config --get remote.origin.url)        \
+               if [ -z "$url" ]; then                                  \
+                       error "cannot determine git url"                \
+               fi                                                      \
+               echo "Registering git url: $url"                        \
+               mr config "$(pwd)" checkout="git clone $url $basedir"   \
+       elif [ -d .bzr ]; then                                          \
+               url=$(cat .bzr/branch/parent)                           \
+               if [ -z "$url" ]; then                                  \
+                       error "cannot determine bzr url"                \
+               fi                                                      \
+               echo "Registering bzr url: $url"                        \
+               mr config "$(pwd)" checkout="bzr clone $url $basedir"   \
+       else                                                            \
+               error "unable to register this repo type"               \
+       fi

 list = true
 list = true

-
+config = 

 help =                                                 \
        if [ ! -e "$MR_PATH" ]; then                    \
                error "cannot find program path"        \
 help =                                                 \
        if [ ! -e "$MR_PATH" ]; then                    \
                error "cannot find program path"        \