X-Git-Url: https://git.madduck.net/code/myrepos.git/blobdiff_plain/4cda4e5c360d4cd0cd33ef8b3bd2cd55eb50b583..ed9aa4b974f78cf0029bd3c27489acae687faa81:/mr?ds=inline

diff --git a/mr b/mr
index aa15728..04a5cbf 100755
--- a/mr
+++ b/mr
@@ -12,7 +12,11 @@ B<mr> [options] update
 
 B<mr> [options] status
 
-B<mr> [options] commit -m "message"
+B<mr> [options] commit [-m "message"]
+
+B<mr> [options] diff
+
+B<mr> [options] log
 
 B<mr> [options] action [params ...]
 
@@ -20,10 +24,70 @@ B<mr> [options] action [params ...]
 
 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 like "update", "checkout", or "commit".
+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 (or co)
+
+Checks out any repositories that are not already checked out.
+
+=item update
+
+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 repository, showing what
+uncommitted changes are present in the repository.
+
+=item commit (or ci)
+
+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", 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
 
@@ -32,12 +96,11 @@ define arbitrary actions like "update", "checkout", or "commit".
 =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
@@ -48,40 +111,68 @@ 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
-repository ~/src, that itself contains a ~/src/.mrconfig file, that in turn
-registers several additional repositories.
+B<mr> is configured by .mrconfig files. It starts by reading the .mrconfig
+file in your home directory, and this can in turn chain load .mrconfig files
+from repositories.
+
+Here is an example .mrconfig file:
+
+  [src]
+  checkout = svn co svn://svn.example.com/src/trunk src
+  chain = true
+
+  [src/linux-2.6]
+  checkout = git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
 
 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
-directory that contains the .mrconfig file.
+
+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 add repositories. The section header specifies the
+directory where the repository is located. This is relative to the directory
+that contains the mrconfig file, but you can also choose to use absolute
+paths.
 
 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
-environment, and B<mr> cds into the repository directory before running
-them, except for the "checkout" command, which is run in the parent of the
-repository directory, since the repository isn't checked out yet.
+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".
 
-There are two special parameters. If the "skip" parameter is set and
-its command returns nonzero, then B<mr> will skip acting on that repository.
+Note that these shell commands are run in a "set -e" shell
+environment, where any additional parameters you pass are available in
+"$@". 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.
 
-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".
+A few parameters have special meanings:
 
-For example:
+=over 4
 
-  [src]
-  checkout = svn co svn://svn.example.com/src/trunk src
+=item skip
 
-  [src/linux-2.6]
-  # only check this out on kodama
-  skip = test $(hostname) != kodama
-  checkout = git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
+If the "skip" parameter is set and its command returns nonzero, then B<mr>
+will skip acting on that repository.
+
+=item chain
+
+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.)
+
+=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.
+
+=back
 
 =head1 AUTHOR
 
@@ -102,84 +193,161 @@ my $directory=getcwd();
 my $config="$ENV{HOME}/.mrconfig";
 my $verbose=0;
 my %config;
+my %knownactions;
+my %alias;
 
 Getopt::Long::Configure("no_permute");
 my $result=GetOptions(
-	"d=s" => sub { $directory=abs_path($_[1]) },
-	"c=s" => \$config,
-	"v" => \$verbose,
+	"d|directory=s" => sub { $directory=abs_path($_[1]) },
+	"c|config=s" => \$config,
+	"verbose" => \$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");
+
 }
-my $action=shift @ARGV;
 
 loadconfig(\*DATA);
 loadconfig($config);
 #use Data::Dumper;
 #print Dumper(\%config);
 
-my (@failures, @successes, @skipped);
-my $first=1;
-foreach my $topdir (sort keys %config) {
-	foreach my $subdir (sort keys %{$config{$topdir}}) {
-		next if $subdir eq 'default';
-		
-		my $dir=$topdir.$subdir;
+eval {
+	use FindBin qw($Bin $Script);
+	$ENV{MR_PATH}=$Bin."/".$Script;
+};
 
-		if (defined $directory &&
-		    $dir !~ /^\Q$directory\E\//) {
-			print "mr $action: $dir skipped per -d parameter\n" if $verbose;
-			push @skipped, $dir;
-			next;
-		}
+# alias expansion and command stemming
+my $action=shift @ARGV;
+if (exists $alias{$action}) {
+	$action=$alias{$action};
+}
+if (! exists $knownactions{$action}) {
+	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";
+	}
+}
 
-		print "\n" unless $first;
-		$first=0;
+if ($action eq 'help') {
+	exec($config{''}{DEFAULT}{help});
+}
 
-		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;
+# 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 $dir=($subdir =~/^\//) ? $subdir : $topdir.$subdir;
+		my $d=$directory;
+		$dir.="/" unless $dir=~/\/$/;
+		$d.="/" unless $d=~/\/$/;
+		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 $dir=($subdir =~/^\//) ? $subdir : $topdir.$subdir;
+			my $d=$directory;
+			$dir.="/" unless $dir=~/\/$/;
+			$d.="/" unless $d=~/\/$/;
+			if ($d=~/^\Q$dir\E/) {
+				push @repos, [$dir, $topdir, $subdir];
+				last LEAF;
 			}
 		}
+	}
+	$nochdir=1;
+}
 
-		if ($action eq 'checkout') {
-			if (-e $dir) {
-				print "mr $action: $dir already exists, skipping checkout\n";
-				push @skipped, $dir;
-				next;
-			}
-			$dir=~s/^(.*)\/[^\/]+\/?$/$1/;
-		}
-		if (! chdir($dir)) {
-			print STDERR "mr $action: failed to chdir to $dir: $!\n";
+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" if $verbose;
 			push @skipped, $dir;
+			return;
+		}
+		$dir=~s/^(.*)\/[^\/]+\/?$/$1/;
+	}
+	elsif ($action eq 'update') {
+		if (! -d $dir) {
+			return action("checkout", $dir, $topdir, $subdir);
 		}
-		elsif (! exists $config{$topdir}{$subdir}{$action}) {
-			print STDERR "mr $action: no defined $action command for $topdir$subdir, skipping\n";
+	}
+	
+	$ENV{MR_REPO}=$dir;
+
+	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 (! $nochdir && ! chdir($dir)) {
+		print STDERR "mr $action: failed to chdir to $dir: $!\n";
+		push @failed, $dir;
+	}
+	elsif (! exists $config{$topdir}{$subdir}{$action}) {
+		print STDERR "mr $action: no defined $action command for $topdir$subdir, skipping\n";
+		push @skipped, $dir;
+	}
+	else {
+		if (! $nochdir) {
+			print "mr $action: $dir\n";
 		}
 		else {
-			print "mr $action: in $dir\n";
-			my $command="set -e; my_action(){ $config{$topdir}{$subdir}{$action} ; }; my_action @ARGV";
-			my $ret=system($command);
-			if ($ret != 0) {
-				print STDERR "mr $action: failed to run: $command\n" if $verbose;
-				push @failures, $topdir.$subdir;
-				if ($ret >> 8 != 0) {
-					print STDERR "mr $action: command failed\n";
-				}
-				elsif ($ret != 0) {
-					print STDERR "mr $action: command died ($ret)\n";
-				}
+			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 $action: failed ($ret)\n" if $verbose;
+			push @failed, $dir;
+			if ($ret >> 8 != 0) {
+				print STDERR "mr $action: command failed\n";
 			}
-			else {
-				push @successes, $dir;
+			elsif ($ret != 0) {
+				print STDERR "mr $action: command died ($ret)\n";
 			}
 		}
+		else {
+			push @successful, $dir;
+		}
+
+		print "\n";
 	}
 }
 
@@ -192,12 +360,21 @@ sub showstat {
 	}
 	return;
 }
-print "\nmr $action: finished (".join("; ",
-	showstat($#successes+1, "success", "sucesses"),
-	showstat($#failures+1, "failure", "failures"),
+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 @failures ? 1 : 0;
+if (@failed) {
+	exit 1;
+}
+elsif (! @successful && @skipped) {
+	exit 1;
+}
+exit 0;
 
 my %loaded;
 sub loadconfig {
@@ -212,23 +389,27 @@ sub loadconfig {
 		$dir="";
 	}
 	else {
-		$f=abs_path($f);
-
-		if ($loaded{$f}) {
+		# $f might be a symlink
+		my $absf=abs_path($f);
+		if ($loaded{$absf}) {
 			return;
 		}
-		$loaded{$f}=1;
+		$loaded{$absf}=1;
 
 		print "mr: loading config $f\n" if $verbose;
 		open($in, "<", $f) || die "mr: open $f: $!\n";
 		($dir)=$f=~/^(.*\/)[^\/]+$/;
+		if (! defined $dir) {
+			$dir=".";
+		}
+		$dir=abs_path($dir)."/";
 
 		# copy in defaults from first parent
 		my $parent=$dir;
 		while ($parent=~s/^(.*)\/[^\/]+\/?$/$1/) {
 			if (exists $config{$parent} &&
-			    exists $config{$parent}{default}) {
-				$config{$dir}{default}={ %{$config{$parent}{default}} };
+			    exists $config{$parent}{DEFAULT}) {
+				$config{$dir}{DEFAULT}={ %{$config{$parent}{DEFAULT}} };
 				last;
 			}
 		}
@@ -240,10 +421,6 @@ 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;
@@ -258,15 +435,31 @@ 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}{$section}={ %{$config{$dir}{DEFAULT}} };
+			}
+			if ($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";
+			        }
 			}
-			$config{$dir}{$section}{$parameter}=$value;
 		}
 		else {
-				die "$f line $.: parse error\n";
+			die "$f line $.: parse error\n";
 		}
 	}
 	close $in;
@@ -276,34 +469,89 @@ 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.
-[default]
+__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"/.bzr ]; then \
+		bzr merge "$@"; \
+	elif [ -d "$MR_REPO"/CVS ]; then \
+		cvs update "$@"; \
 	else \
-		echo "mr update: unknown RCS"; \
-		exit 1; \
+		error "unknown repo type"; \
 	fi
 status = \
-	if [ -d .svn ]; then \
-		svn status; \
-	elif [ -d .git ]; then \
-		git status || true; \
+	if [ -d "$MR_REPO"/.svn ]; then \
+		svn status "$@"; \
+	elif [ -d "$MR_REPO"/.git ]; then \
+		git status "$@" || true; \
+	elif [ -d "$MR_REPO"/.bzr ]; then \
+		bzr status "$@"; \
+	elif [ -d "$MR_REPO"/CVS ]; then \
+		cvs status "$@"; \
 	else \
-		echo "mr status: unknown RCS"; \
-		exit 1; \
+		error "unknown repo type"; \
 	fi
 commit = \
-	if [ -d .svn ]; then \
+	if [ -d "$MR_REPO"/.svn ]; then \
 		svn commit "$@"; \
-	elif [ -d .git ]; then \
-		git commit -a "$@"; \
+	elif [ -d "$MR_REPO"/.git ]; then \
+		git commit -a "$@" && git push --all; \
+	elif [ -d "$MR_REPO"/.bzr ]; then \
+		bzr commit "$@" && bzr push; \
+	elif [ -d "$MR_REPO"/CVS ]; then \
+		cvs commit "$@"; \
 	else \
-		echo "mr commit: unknown RCS"; \
-		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 "$MR_REPO"/.bzr ]; then \
+		bzr diff "$@"; \
+	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 "$MR_REPO"/.bzr ]; then \
+		bzr log "$@"; \
+	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"
+
+ed = echo "A horse is a horse, of course, of course.."
+T = echo "I pity the fool."