X-Git-Url: https://git.madduck.net/code/myrepos.git/blobdiff_plain/99a9fd6c2b74cb771d07996f6f027d007d50239a..cec9366aea873ebe2dca710d42f78d080c7d1ff0:/mr

diff --git a/mr b/mr
index 6a525cd..470927a 100755
--- a/mr
+++ b/mr
@@ -14,50 +14,80 @@ B<mr> [options] status
 
 B<mr> [options] commit [-m "message"]
 
+B<mr> [options] diff
+
+B<mr> [options] log
+
 B<mr> [options] action [params ...]
 
 =head1 DESCRIPTION
 
 B<mr> is a Multiple Repository management tool. It allows you to register a
 set of repositories in a .mrconfig file, and then checkout, update, or
-perform other actions on all of the repositories at once.
+perform other actions on the repositories as if they were one big
+respository.
 
 Any mix of revision control systems can be used with B<mr>, and you can
 define arbitrary actions for commands like "update", "checkout", or "commit".
 
+B<mr> cds into and operates on all registered repsitories at or below your
+working directory. Or, if you are in a subdirectory of a repository that
+contains no other registered repositories, it will stay in that directory,
+and work on only that repository,
+
 The predefined commands should be fairly familiar to users of any revision
 control system:
 
 =over 4
 
-=item checkout
+=item checkout (or co)
 
-Checks out all the registered repositories that are not already checked
-out.
+Checks out any repositories that are not already checked out.
 
 =item update
 
-Updates each registered repository from its configured remote repository.
+Updates each repository from its configured remote repository.
 
 If a repository isn't checked out yet, it will first check it out.
 
 =item status
 
-Displays a status report for each registered repository, showing what
+Displays a status report for each repository, showing what
 uncommitted changes are present in the repository.
 
-=item commit
+=item commit (or ci)
 
-Commits changes to each registered repository. (By default, changes
-are pushed to the remote repository too, when using distributed systems
-like git.)
+Commits changes to each repository. (By default, changes are pushed to the
+remote repository too, when using distributed systems like git.)
 
 The optional -m parameter allows specifying a commit message.
 
+=item diff
+
+Show a diff of uncommitted changes.
+
+=item log
+
+Show the commit log.
+
+=item list (or ls)
+
+List the repositories that mr will act on.
+
+=item help
+
+Displays this help.
+
 =back
 
 Actions can be abbreviated to any unambiguous subsctring, so
-"mr st" is equivilant to "mr status".
+"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.
 
 =head1 OPTIONS
 
@@ -66,12 +96,11 @@ Actions can be abbreviated to any unambiguous subsctring, so
 =item -d directory
 
 Specifies the topmost directory that B<mr> should work in. The default is
-the current working directory. B<mr> will operate on all registered
-repositories at or under the directory.
+the current working directory.
 
 =item -c mrconfig
 
-Use the specified mrconfig file, instead of looking for on in your home
+Use the specified mrconfig file, instead of looking for one in your home
 directory.
 
 =item -v
@@ -91,26 +120,37 @@ registers several additional repositories.
 
 The .mrconfig file uses a variant of the INI file format. Lines starting with
 "#" are comments. Lines ending with "\" are continued on to the next line.
-Sections specify where each repository is located, relative to the
+
+The "default" section allows setting default values for the sections that
+come after it.
+
+The "alias" section allows adding aliases for actions. Each parameter
+is an alias, and its value is the action to use.
+
+All other sections specify where each repository is located, relative to the
 directory that contains the .mrconfig file.
 
 Within a section, each parameter defines a shell command to run to handle a
-given action. Note that these shell commands are run in a "set -e" shell
+given action. mr contains default handlers for the "update", "status", and
+"commit" actions, so normally you only need to specify what to do for
+"checkout".
+
+Note that these shell commands are run in a "set -e" shell
 environment, where any additional parameters you pass are available in
-"$@". B<mr> cds into the repository directory before running
-a command, except for the "checkout" command, which is run in the parent
-of the repository directory, since the repository isn't checked out yet.
+"$@". The "checkout" command is run in the parent of the repository
+directory, since the repository isn't checked out yet. All other commands
+are run inside the repository, though not necessarily at the top of it.
+The "MR_REPO" environment variable is set to the path to the top of the
+repository.
 
-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 "default" section allows setting up default handlers for each action,
-and is overridden by the contents of other sections. mr contains default
-handlers for the "update", "status", and "commit" actions, so normally
-you only need to specify what to do for "checkout".
+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 for other commands
+to use.
 
 For example:
 
@@ -119,10 +159,19 @@ For example:
   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>
@@ -143,6 +192,7 @@ my $config="$ENV{HOME}/.mrconfig";
 my $verbose=0;
 my %config;
 my %knownactions;
+my %alias;
 
 Getopt::Long::Configure("no_permute");
 my $result=GetOptions(
@@ -151,7 +201,9 @@ my $result=GetOptions(
 	"v" => \$verbose,
 );
 if (! $result || @ARGV < 1) {
-	die("Usage: mr [-d directory] action [params ...]\n");
+	die("Usage: mr [-d directory] action [params ...]\n".
+	    "(Use mr help for man page.)\n");
+
 }
 
 loadconfig(\*DATA);
@@ -159,82 +211,127 @@ loadconfig($config);
 #use Data::Dumper;
 #print Dumper(\%config);
 
+eval {
+	use FindBin qw($Bin $Script);
+	$ENV{MR_PATH}=$Bin."/".$Script;
+};
+
+# alias expansion and command stemming
 my $action=shift @ARGV;
-if (! $knownactions{$action}) {
-	my @matches = grep { /^\Q$action\E/ } keys %knownactions;
-	if (@matches == 1) {
-		$action=$matches[0];
+if (! exists $knownactions{$action}) {
+	if (exists $alias{$action}) {
+		$action=$alias{$action};
 	}
 	else {
-		die "mr: ambiguous action \"$action\" (matches @matches)\n";
+		my @matches = grep { /^\Q$action\E/ }
+			keys %knownactions, keys %alias;
+		if (@matches == 1) {
+			$action=$matches[0];
+		}
+		elsif (@matches == 0) {
+			die "mr: unknown action \"$action\" (known actions: ".
+				join(", ", sort keys %knownactions).")\n";
+		}
+		else {
+			die "mr: ambiguous action \"$action\" (matches: ".
+				join(", ", @matches).")\n";
+		}
 	}
 }
 
-my (@failed, @successful, @skipped);
-my $first=1;
+if ($action eq 'help') {
+	exec($config{''}{default}{help});
+}
+
+# work out what repos to act on
+my @repos;
+my $nochdir=0;
 foreach my $topdir (sort keys %config) {
 	foreach my $subdir (sort keys %{$config{$topdir}}) {
 		next if $subdir eq 'default';
-		
 		my $dir=$topdir.$subdir;
-
-		if (defined $directory &&
-		    $dir ne $directory &&
-		    $dir !~ /^\Q$directory\E\//) {
-			print "mr $action: $dir skipped per -d parameter ($directory)\n" if $verbose;
-			push @skipped, $dir;
-			next;
-		}
-
-		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;
+		next if $dir ne $directory && $dir !~ /^\Q$directory\E\//;
+		push @repos, [$dir, $topdir, $subdir];
+	}
+}
+if (! @repos) {
+	# fallback to find a leaf repo
+	LEAF: foreach my $topdir (reverse sort keys %config) {
+		foreach my $subdir (reverse sort keys %{$config{$topdir}}) {
+			next if $subdir eq 'default';
+			my $dir=$topdir.$subdir;
+			my $d=$directory;
+			$dir.="/" unless $dir=~/\/$/;
+			$d.="/" unless $d=~/\/$/;
+			if ($d=~/^\Q$dir\E/) {
+				push @repos, [$dir, $topdir, $subdir];
+				last LEAF;
 			}
 		}
-
-		action($action, $dir, $topdir, $subdir);
-
 	}
+	$nochdir=1;
+}
+
+my (@failed, @successful, @skipped);
+foreach my $repo (@repos) {
+	action($action, @$repo);
 }
 
 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;
 			return;
 		}
 		$dir=~s/^(.*)\/[^\/]+\/?$/$1/;
 	}
-	if ($action eq 'update') {
+	elsif ($action eq 'update') {
 		if (! -d $dir) {
 			return action("checkout", $dir, $topdir, $subdir);
 		}
 	}
-
-	if (! chdir($dir)) {
+	
+	$ENV{MR_REPO}=$dir;
+	if (! $nochdir && ! chdir($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 $test="set -e;".$lib.$config{$topdir}{$subdir}{skip};
+		print "mr $action: running skip test $test\n" if $verbose;
+		my $ret=system($test);
+		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 ".
+		if (! $nochdir) {
+			print "mr $action: $dir\n";
+		}
+		else {
+			print "mr $action: $dir (in subdir $directory)\n";
+		}
+		my $command="set -e; ".$lib.
+			"my_action(){ $config{$topdir}{$subdir}{$action} ; }; my_action ".
 			join(" ", map { s/\//\/\//g; s/"/\"/g; '"'.$_.'"' } @ARGV);
+		print STDERR "mr $action: running $command\n" if $verbose;
 		my $ret=system($command);
 		if ($ret != 0) {
-			print STDERR "mr $action: failed to run: $command\n" if $verbose;
+			print STDERR "mr $action: failed ($ret)\n" if $verbose;
 			push @failed, $topdir.$subdir;
 			if ($ret >> 8 != 0) {
 				print STDERR "mr $action: command failed\n";
@@ -246,6 +343,8 @@ sub action {
 		else {
 			push @successful, $dir;
 		}
+
+		print "\n";
 	}
 }
 
@@ -258,12 +357,21 @@ sub showstat {
 	}
 	return;
 }
-print "\nmr $action: finished (".join("; ",
+if (! @successful && ! @failed && ! @skipped) {
+	die "mr $action: no repositories found to work on\n";
+}
+print "mr $action: finished (".join("; ",
 	showstat($#successful+1, "successful", "successful"),
 	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 {
@@ -324,23 +432,31 @@ sub loadconfig {
 			if (! defined $section) {
 				die "$f line $.: parameter ($parameter) not in section\n";
 			}
-			if (! exists $config{$dir}{$section} &&
-			      exists $config{$dir}{default}) {
+			if ($section ne 'alias' &&
+			    ! exists $config{$dir}{$section} &&
+			    exists $config{$dir}{default}) {
 				# copy in defaults
 				$config{$dir}{$section}={ %{$config{$dir}{default}} };
 			}
-			$config{$dir}{$section}{$parameter}=$value;
-			$knownactions{$parameter}=1;
-
-			if ($parameter eq 'chain' &&
-			    length $dir && $section ne "default" &&
-			    -e $dir.$section."/.mrconfig" &&
-		    	    system($value) >> 8 == 0) {
-				push @toload, $dir.$section."/.mrconfig";
-		        }
+			if ($section eq 'alias') {
+				$alias{$parameter}=$value;
+			}
+			elsif ($parameter eq 'lib') {
+				$config{$dir}{$section}{lib}.=$value." ; ";
+			}
+			else {
+				$config{$dir}{$section}{$parameter}=$value;
+				$knownactions{$parameter}=1;
+				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 $.: parse error\n";
+			die "$f line $.: parse error\n";
 		}
 	}
 	close $in;
@@ -350,35 +466,73 @@ 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__
+[alias]
+	co = checkout
+	ci = commit
+	ls = list
 [default]
+lib = \
+	error() { \
+		echo "mr: $@" >&2; \
+		exit 1; \
+	}
 update = \
-	if [ -d .svn ]; then \
-		svn update; \
-	elif [ -d .git ]; then \
-		git pull origin master; \
+	if [ -d "$MR_REPO"/.svn ]; then \
+		svn update "$@"; \
+	elif [ -d "$MR_REPO"/.git ]; then \
+		git pull origin master "$@"; \
+	elif [ -d "$MR_REPO"/CVS ]; then \
+		cvs update "$@"; \
 	else \
-		echo "mr update: unknown repo type"; \
-		exit 1; \
+		error "unknown repo type"; \
 	fi
 status = \
-	if [ -d .svn ]; then \
-		svn status; \
-	elif [ -d .git ]; then \
-		git status || true; \
+	if [ -d "$MR_REPO"/.svn ]; then \
+		svn status "$@"; \
+	elif [ -d "$MR_REPO"/.git ]; then \
+		git status "$@" || true; \
+	elif [ -d "$MR_REPO"/CVS ]; then \
+		cvs status "$@"; \
 	else \
-		echo "mr status: unknown repo type"; \
-		exit 1; \
+		error "unknown repo type"; \
 	fi
 commit = \
-	if [ -d .svn ]; then \
+	if [ -d "$MR_REPO"/.svn ]; then \
 		svn commit "$@"; \
-	elif [ -d .git ]; then \
-		echo git commit -a "$@" && echo git push --all \
-		git commit -a "$@" && git push --all \
+	elif [ -d "$MR_REPO"/.git ]; then \
+		git commit -a "$@" && git push --all; \
+	elif [ -d "$MR_REPO"/CVS ]; then \
+		cvs commit "$@"; \
 	else \
-		echo "mr commit: unknown repo type"; \
-		exit 1; \
+		error "unknown repo type"; \
+	fi
+diff = \
+	if [ -d "$MR_REPO"/.svn ]; then \
+		svn diff "$@"; \
+	elif [ -d "$MR_REPO"/.git ]; then \
+		git diff "$@"; \
+	elif [ -d "$MR_REPO"/CVS ]; then \
+		cvs diff "$@"; \
+	else \
+		error "unknown repo type"; \
+	fi
+log = \
+	if [ -d "$MR_REPO"/.svn ]; then \
+		svn log"$@"; \
+	elif [ -d "$MR_REPO"/.git ]; then \
+		git log "$@"; \
+	elif [ -d "$MR_REPO"/CVS ]; then \
+		cvs log "$@"; \
+	else \
+		error "unknown repo type"; \
 	fi
+list = true
+help = \
+	if [ ! -e "$MR_PATH" ]; then \
+		error "cannot find program path";\
+	fi; \
+	(pod2man -c mr "$MR_PATH" | man -l -) || \
+		error "pod2man or man failed"