reword

[code/myrepos.git] / mr

diff --git a/mr b/mr
index ff5b60d867c620bf0d00abae2f0eb8d36e86f756..f14ba4dddebfd38fb55f9a823e7cea2e7050b2b2 100755 (executable)
--- a/mr
+++ b/mr
@@ -415,9 +415,13 @@ 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
-command, this can be a useful way to define shell functions for other commands
-to use.
+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 for other commands to use. 
+
+Unlike most other parameters, this can be specified multiple times, in
+which case the chunks of shell code are accumulatively concatenated
+together.
 
 =item fixups
 
@@ -426,14 +430,7 @@ is checked out, or updated. This provides an easy way to do things
 like permissions fixups, or other tweaks to the repository content,
 whenever the repository is changed.
 
-=item pre_ and post_
-
-If a "pre_action" parameter is set, its command is run before mr performs the
-specified action. Similarly, "post_action" parameters are run after mr
-successfully performs the specified action. For example, "pre_commit" is
-run before committing; "post_update" is run after updating.
-
-=back
+=item VCS_action
 
 When looking for a command to run for a given action, mr first looks for
 a parameter with the same name as the action. If that is not found, it
@@ -447,6 +444,21 @@ the action that is performed for a given version control system, you can
 override these VCS specific actions. To add a new version control system,
 you can just add VCS specific actions for it.
 
+=item pre_ and post_
+
+If a "pre_action" parameter is set, its command is run before mr performs the
+specified action. Similarly, "post_action" parameters are run after mr
+successfully performs the specified action. For example, "pre_commit" is
+run before committing; "post_update" is run after updating.
+
+=item _append
+
+Any parameter can be suffixed with C<_append>, to add an additional value
+to the existing value of the parameter. In this way, actions 
+can be constructed accumulatively.
+
+=back
+
 =head1 UNTRUSTED MRCONFIG FILES
 
 Since mrconfig files can contain arbitrary shell commands, they can do
@@ -1107,20 +1119,6 @@ sub is_trusted_checkout {
        return 0;
 }
 
-sub trusterror {
-       my ($err, $file, $line, $url)=@_;
-       
-       if (defined $url) {
-               die "$err in untrusted $url line $line\n".
-                       "(To trust this url, --trust-all can be used; but please use caution;\n".
-                       "this can allow arbitrary code execution!)\n";
-       }
-       else {
-               die "$err in untrusted $file line $line\n".
-                       "(To trust this file, list it in ~/.mrtrust.)\n";
-       }
-}
-
 my %loaded;
 sub loadconfig {
        my $f=shift;
@@ -1185,30 +1183,43 @@ sub loadconfig {
 
        # Keep track of the current line in the config file;
        # when a file is included track the current line from the include.
-       my $line=0;
+       my $lineno=0;
        my $included=undef;
-       my $includeline=0;
+
+       my $line;
        my $nextline = sub {
                if ($included) {
-                       $includeline++;
                        $included--;
                }
                else {
                        $included=undef;
-                       $includeline=0;
-                       $line++;
+                       $lineno++;
                }
-               my $l=shift @lines;
-               chomp $l;
-               return $l
+               $line=shift @lines;
+               chomp $line;
+               return $line;
        };
        my $lineerror = sub {
                my $msg=shift;
                if (defined $included) {
-                       die "mr: $f line $line include line $includeline: $msg\n";
+                       die "mr: $msg at $f line $lineno, included line: $line\n";
+               }
+               else {
+                       die "mr: $msg at $f line $lineno\n";
+               }
+       };
+       my $trusterror = sub {
+               my $msg=shift;
+               my ($err, $file, $lineno, $url)=@_;
+       
+               if (defined $bootstrap_url) {
+                       die "mr: $err in untrusted $bootstrap_url line $lineno\n".
+                               "(To trust this url, --trust-all can be used; but please use caution;\n".
+                               "this can allow arbitrary code execution!)\n";
                }
                else {
-                       die "mr: $f line $line: $msg\n";
+                       die "mr: $err in untrusted $file line $lineno\n".
+                               "(To trust this file, list it in ~/.mrtrust.)\n";
                }
        };
 
@@ -1216,7 +1227,7 @@ sub loadconfig {
                $_=$nextline->();
 
                if (! $trusted && /[[:cntrl:]]/) {
-                       trusterror("mr: illegal control character", $f, $line, $bootstrap_url);
+                       $trusterror->("illegal control character");
                }
 
                next if /^\s*\#/ || /^\s*$/;
@@ -1227,7 +1238,7 @@ sub loadconfig {
                                if (! is_trusted_repo($section) ||
                                    $section eq 'ALIAS' ||
                                    $section eq 'DEFAULT') {
-                                       trusterror("mr: illegal section \"[$section]\"", $f, $line, $bootstrap_url)
+                                       $trusterror->("illegal section \"[$section]\"");
                                }
                        }
                        $section=expandenv($section) if $trusted;
@@ -1254,7 +1265,7 @@ sub loadconfig {
                                # settings in specific known-safe formats.
                                if ($parameter eq 'checkout') {
                                        if (! is_trusted_checkout($value)) {
-                                               trusterror("mr: illegal checkout command \"$value\"", $f, $line, $bootstrap_url);
+                                               $trusterror->("illegal checkout command \"$value\"");
                                        }
                                }
                                elsif ($parameter eq 'order') {
@@ -1266,7 +1277,7 @@ sub loadconfig {
                                        # safe.
                                }
                                else {
-                                       trusterror("mr: illegal setting \"$parameter=$value\"", $f, $line, $bootstrap_url);
+                                       $trusterror->("illegal setting \"$parameter=$value\"");
                                }
                        }
 
@@ -1287,8 +1298,8 @@ sub loadconfig {
                        if ($section eq 'ALIAS') {
                                $alias{$parameter}=$value;
                        }
-                       elsif ($parameter eq 'lib') {
-                               $config{$dir}{$section}{lib}.=$value."\n";
+                       elsif ($parameter eq 'lib' or $parameter =~ s/_append$//) {
+                               $config{$dir}{$section}{$parameter}.="\n".$value."\n";
                        }
                        else {
                                $config{$dir}{$section}{$parameter}=$value;
@@ -1970,3 +1981,7 @@ T = echo "I pity the fool."
 right = echo "Not found."
 
 # vim:sw=8:sts=0:ts=8:noet
+# Local variables:
+# indent-tabs-mode: t
+# cperl-indent-level: 8
+# End: