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properly return from function
[code/myrepos.git] / mr
diff --git a/mr b/mr
index 03a14b714427111b403f375a61948773f0a15c5c..7a54750af46374a6d0a504e84456e1f45b57bffd 100755 (executable)
--- a/mr
+++ b/mr
@@ -82,9 +82,10 @@ Be verbose.
 
 =head1 FILES
 
-B<mr> is configured by .mrconfig files. It searches for .mrconfig files in
-your home directory, and in the root directory of each repository specified
-in a .mrconfig file. So you could have a ~/.mrconfig that registers a
+B<mr> is configured by .mrconfig files. It starts by reading the .mrconfig
+file in your home directory. Each repository specified in a .mrconfig file
+can also have its own .mrconfig file in its root directory that can
+optionally be used as well. So you could have a ~/.mrconfig that registers a
 repository ~/src, that itself contains a ~/src/.mrconfig file, that in turn
 registers several additional repositories.
 
@@ -100,8 +101,14 @@ environment, where any additional parameters you pass are available in
 a command, except for the "checkout" command, which is run in the parent
 of the repository directory, since the repository isn't checked out yet.
 
-There are two special parameters. If the "skip" parameter is set and
+There are three special parameters. If the "skip" parameter is set and
 its command returns nonzero, then B<mr> will skip acting on that repository.
+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.) The
+"lib" parameter can specify some shell code that will be run before each
+command, this can be a useful way to define shell functions other commands
+can use.
 
 The "default" section allows setting up default handlers for each action,
 and is overridden by the contents of other sections. mr contains default
@@ -112,12 +119,22 @@ For example:
 
   [src]
   checkout = svn co svn://svn.example.com/src/trunk src
+  chain = true
 
   [src/linux-2.6]
-  # only check this out on kodama
-  skip = test $(hostname) != kodama
+  skip = small
   checkout = git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
 
+  [default]
+  lib = \
+  small() {
+       case "$(hostname)" in; \
+       slug|snail); \
+               return 0; ;; ; \
+       esac; \
+       return 1; \
+  }
+
 =head1 AUTHOR
 
 Copyright 2007 Joey Hess <joey@kitenet.net>
@@ -184,15 +201,6 @@ foreach my $topdir (sort keys %config) {
                print "\n" unless $first;
                $first=0;
 
-               if (exists $config{$topdir}{$subdir}{skip}) {
-                       my $ret=system($config{$topdir}{$subdir}{skip});
-                       if ($ret >> 8 == 0) {
-                               print "mr $action: $dir skipped per config file\n" if $verbose;
-                               push @skipped, $dir;
-                               next;
-                       }
-               }
-
                action($action, $dir, $topdir, $subdir);
 
        }
@@ -200,32 +208,46 @@ foreach my $topdir (sort keys %config) {
 
 sub action {
        my ($action, $dir, $topdir, $subdir) = @_;
+       
+       my $lib= exists $config{$topdir}{$subdir}{lib} ?
+                       $config{$topdir}{$subdir}{lib} : "";
 
        if ($action eq 'checkout') {
                if (-d $dir) {
-                       print "mr $action: $dir already exists, skipping checkout\n";
+                       print "mr $action: $dir already exists, skipping checkout\n" if $verbose;
                        push @skipped, $dir;
-                       next;
+                       return;
                }
                $dir=~s/^(.*)\/[^\/]+\/?$/$1/;
        }
-       if ($action eq 'update') {
+       elsif ($action eq 'update') {
                if (! -d $dir) {
                        return action("checkout", $dir, $topdir, $subdir);
                }
        }
-
+       
        if (! chdir($dir)) {
                print STDERR "mr $action: failed to chdir to $dir: $!\n";
                push @skipped, $dir;
        }
-       elsif (! exists $config{$topdir}{$subdir}{$action}) {
+
+       if (exists $config{$topdir}{$subdir}{skip}) {
+               my $ret=system($lib.$config{$topdir}{$subdir}{skip});
+               if ($ret >> 8 == 0) {
+                       print "mr $action: $dir skipped per config file\n" if $verbose;
+                       push @skipped, $dir;
+                       return;
+               }
+       }
+
+       if (! exists $config{$topdir}{$subdir}{$action}) {
                print STDERR "mr $action: no defined $action command for $topdir$subdir, skipping\n";
                push @skipped, $dir;
        }
        else {
                print "mr $action: in $dir\n";
-               my $command="set -e; my_action(){ $config{$topdir}{$subdir}{$action} ; }; my_action ".
+               my $command="set -e; ".$lib.
+                       "my_action(){ $config{$topdir}{$subdir}{$action} ; }; my_action ".
                        join(" ", map { s/\//\/\//g; s/"/\"/g; '"'.$_.'"' } @ARGV);
                my $ret=system($command);
                if ($ret != 0) {
@@ -258,7 +280,13 @@ print "\nmr $action: finished (".join("; ",
        showstat($#failed+1, "failed", "failed"),
        showstat($#skipped+1, "skipped", "skipped"),
 ).")\n";
-exit @failed ? 1 : 0;
+if (@failed) {
+       exit 1;
+}
+elsif (! @successful && @skipped) {
+       exit 1;
+}
+exit 0;
 
 my %loaded;
 sub loadconfig {
@@ -305,10 +333,6 @@ sub loadconfig {
                next if /^\s*\#/ || /^\s*$/;
                if (/^\s*\[([^\]]*)\]\s*$/) {
                        $section=$1;
-                       if (length $dir && $section ne "default" &&
-                           -e $dir.$section."/.mrconfig") {
-                               push @toload, $dir.$section."/.mrconfig";
-                       }
                }
                elsif (/^\s*(\w+)\s*=\s*(.*)/) {
                        my $parameter=$1;
@@ -328,8 +352,20 @@ sub loadconfig {
                                # copy in defaults
                                $config{$dir}{$section}={ %{$config{$dir}{default}} };
                        }
-                       $config{$dir}{$section}{$parameter}=$value;
-                       $knownactions{$parameter}=1;
+                       if ($parameter ne 'lib') {
+                               $config{$dir}{$section}{$parameter}=$value;
+                               $knownactions{$parameter}=1;
+                       }
+                       else {
+                               $config{$dir}{$section}{$parameter}.=$value." ; ";
+                       }
+
+                       if ($parameter eq 'chain' &&
+                           length $dir && $section ne "default" &&
+                           -e $dir.$section."/.mrconfig" &&
+                           system($value) >> 8 == 0) {
+                               push @toload, $dir.$section."/.mrconfig";
+                       }
                }
                else {
                                die "$f line $.: parse error\n";
@@ -342,18 +378,22 @@ sub loadconfig {
        }
 }
 
-__DATA__
-# Some useful actions that mr knows about by default.
+# Finally, some useful actions that mr knows about by default.
 # These can be overridden in ~/.mrconfig.
+__DATA__
 [default]
+lib = \
+       error() { \
+               echo "mr: $@" >&2; \
+               exit 1; \
+       }
 update = \
        if [ -d .svn ]; then \
                svn update; \
        elif [ -d .git ]; then \
                git pull origin master; \
        else \
-               echo "mr update: unknown repo type"; \
-               exit 1; \
+               error "unknown repo type"; \
        fi
 status = \
        if [ -d .svn ]; then \
@@ -361,15 +401,13 @@ status = \
        elif [ -d .git ]; then \
                git status || true; \
        else \
-               echo "mr status: unknown repo type"; \
-               exit 1; \
+               error "unknown repo type"; \
        fi
 commit = \
        if [ -d .svn ]; then \
                svn commit "$@"; \
        elif [ -d .git ]; then \
-               git commit -a  "$@" \
+               git commit -a "$@" && git push --all; \
        else \
-               echo "mr commit: unknown repo type"; \
-               exit 1; \
+               error "unknown repo type"; \
        fi