codereview: make commit -a the default; warn about uncommitted changes at upload

also update README.md for github

Change-Id: I7d578a902ffed7f6d69780721e29a1972b6f6992

README.md

@@ -1,6 +1,7 @@
 This is a port of many Plan 9 libraries and programs to Unix.
 
-* Installation
+Installation
+------------
 
 To install, run ./INSTALL.  It builds mk and then uses mk to
 run the rest of the installation.  
@@ -8,7 +9,8 @@ run the rest of the installation.
 For more details, see install(1), at install.txt in this directory
 and at http://swtch.com/plan9port/man/man1/install.html.
 
-* Documentation
+Documentation
+-------------
 
 See http://swtch.com/plan9port/man/ for more documentation.
 (Documentation is also in this tree, but you need to run
@@ -17,21 +19,28 @@ a successful install first.  After that, "9 man 1 intro".)
 Intro(1) contains a list of man pages that describe new features
 or differences from Plan 9.
 
-* Helping out
+Helping out
+-----------
 
 If you'd like to help out, great!  The TODO file contains a small list.
 
 If you port this code to other architectures, please share your changes
 so others can benefit.
 
-Please use diff -u or CVS (see below) to prepare patches.
+Please use codereview(1) to prepare patches.
 
-* CVS
+Git
+---
 
-You can use CVS to keep your local copy up-to-date as we make 
+You can use Git to keep your local copy up-to-date as we make 
-changes and fix bugs.  See the cvs(1) man page here ("9 man cvs")
+changes and fix bugs.  See the git(1) man page here ("9 man git")
-for details on using cvs.
+for details on using Git.
 
-* Contact
+Contact
+-------
 
-Russ Cox <rsc@swtch.com>
+* Mailing list: http://groups.google.com/group/plan9port-dev
+* Issue tracker: http://code.swtch.com/plan9port/issues/
+* Submitting changes: http://swtch.com/go/codereview
+
+* Russ Cox <rsc@swtch.com>

bin/codereview

@@ -59,7 +59,7 @@ case create
 	if($show) {
 		echo '% git branch '$branch' && git commit || git branch -d '$branch >[1=2]
 	}
-	git branch $branch && git checkout $branch && git commit $* || git branch -d $branch
+	git branch $branch && git checkout $branch && git commit -a $* || git branch -d $branch
 
 case commit
 	shift
@@ -72,7 +72,7 @@ case commit
 		$git commit $*
 		exit $status
 	}
-	$git commit --amend $*
+	$git commit --amend -a $*
 	exit $status
 
 case upload
@@ -88,6 +88,10 @@ case upload
 	if(! 9 grep 'machine plan9port-review.googlesource.com' $HOME/.netrc >/dev/null >[2=1]) {
 		echo 'codereview: warning: cannot find plan9port-review in netrc' >[1=2]
 	}
+	if(! git status | 9 grep 'nothing to commit, working directory clean' >/dev/null) {
+		echo 'codereview: warning: local changes not yet committed' >[1=2]
+		git status
+	}
 	$git push https://plan9port-review.googlesource.com/plan9 HEAD:refs/for/master >[2=1] | 9 sed 's/.*
//'
 
 case sync

man/man1/codereview.1

@@ -13,18 +13,12 @@ codereview \- review of submitted changes (experimental)
 ]
 .B create
 .I name
-[
-.B -a
-]
 .PP
 .B codereview
 [
 .B -v
 ]
 .B commit
-[
-.B -a
-]
 .PP
 .B codereview
 [
@@ -60,6 +54,10 @@ and then commits them to a ``feature branch''
 using
 .I codereview
 .IR create .
+Once a feature branch is created, files can still be edited, but they must then be
+incorporated into the change by using
+.I codereview
+.IR commit .
 .I Git
 requires that changes be added to a ``staging area'' before the initial commit,
 using commands such as
@@ -69,16 +67,18 @@ and
 .I git
 .IR rm .
 The 
-.B -a
-option causes
 .I codereview
 .I create
-to add all local modifications to the staging area as part of the initial commit.
+and
-.PP
-Once a feature branch is created, files can still be edited, but they must then be
-incorporated into the change by using
 .I codereview
-.IR commit .
+.I commit
+commands
+automatically move all local modifications to the staging area
+as part of the commit,
+using
+.I git
+.I commit
+.IR -a .
 .PP
 If other changes have been committed since the feature branch was created,
 .I codereview