shithub: git9

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git/commit: add -a flag to amend

The first change to support editing history.
Git/commit -a will now change the contents of
a commit, preserving the message.

To change the message, use -am 'msg'.

--- a/commit

+++ b/commit

@@ -75,7 +75,9 @@

 }

 fn parents{

-	if(test -f .git/index9/merge-parents)

+	if(! ~ $#amend 0)

+		parents=`{cat /mnt/git/HEAD/parent}

+	if not if(test -f .git/index9/merge-parents)

 		parents=`{cat .git/index9/merge-parents | sort | uniq}

 	if not if(~ $initial true)

 		parents=()

@@ -116,7 +118,7 @@

 gitup

-flagfmt='m:msg message'; args='file ...'

+flagfmt='m:msg message, a:amend'; args='file ...'

 eval `''{aux/getflags $*} || exec aux/usage

 if(~ $#* 0)

 	exec aux/usage

@@ -124,6 +126,10 @@

 msgfile=/tmp/git-msg.$pid

 if(~ $#msg 1)

 	echo $msg >$msgfile.tmp

+if not if(~ $#amend 1){

+	msg=1

+	cat /mnt/git/HEAD/msg >$msgfile.tmp

+}

 files=`{git/walk -c `{cleanname $gitrel/$*}}

 if(~ $status '' || ~ $#files 0 && ! test -f .git/index9/merge-parents)

--- a/git.1.man

+++ b/git.1.man

@@ -36,6 +36,9 @@

 .PP

 .B git/commit

 [

+.B -a

+]

+[

 .B -m msg

 ]

 .I file...

@@ -308,11 +311,22 @@

 .PP

 .B Git/rm

 is an alias for

-.I git/add.

+.IR git/add -r .

 .PP

 .B Git/commit

-creates a new commit which updates the files passed.

+creates a new commit consisting of all changes to the specified files.

+By default, an editor is opened to prepare the commit message.

+The

+.I -m

+supplies the commit message directly.

+The

+.I -a

+flag amends the contents of the previous commit, reusing the message.

+To a commit message,

+.I -a

+can be used in conjuction with

+.IR -m .

 .PP

 .B Git/branch