am: remove support for -d .dotest

It has been supported for a long time, but I do not think this feature has
been in use in the real world at all.  We would eventually move this out
of the toplevel of the work tree and to somewhere under $GIT_DIR, so let's
remove the command line option to specify the location now.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-am.txt

diff --git a/Documentation/git-am.txt b/Documentation/git-am.txt
index e640fc7..2387a8d 100644
--- a/Documentation/git-am.txt
+++ b/Documentation/git-am.txt
@@ -9,7 +9,7 @@
 SYNOPSIS
 --------
 [verse]
-'git-am' [--signoff] [--dotest=<dir>] [--keep] [--utf8 | --no-utf8]
+'git-am' [--signoff] [--keep] [--utf8 | --no-utf8]
          [--3way] [--interactive] [--binary]
          [--whitespace=<option>] [-C<n>] [-p<n>]
          <mbox>|<Maildir>...
@@ -32,10 +32,6 @@
 	Add `Signed-off-by:` line to the commit message, using
 	the committer identity of yourself.
 
--d=<dir>, --dotest=<dir>::
-	Instead of `.dotest` directory, use <dir> as a working
-	area to store extracted patches.
-
 -k, --keep::
 	Pass `-k` flag to `git-mailinfo` (see linkgit:git-mailinfo[1]).
 

git-am.sh

diff --git a/git-am.sh b/git-am.sh
index 2b5bbb7..1846876 100755
--- a/git-am.sh
+++ b/git-am.sh
@@ -9,7 +9,7 @@
 git-am [options] --resolved
 git-am [options] --skip
 --
-d,dotest=       use <dir> and not .dotest
+d,dotest=       (removed -- do not use)
 i,interactive   run interactively
 b,binary        pass --allo-binary-replacement to git-apply
 3,3way          allow fall back on 3way merging if needed
@@ -50,10 +50,6 @@
     then
         cmdline="$cmdline -3"
     fi
-    if test '.dotest' != "$dotest"
-    then
-        cmdline="$cmdline -d=$dotest"
-    fi
     echo "When you have resolved this problem run \"$cmdline --resolved\"."
     echo "If you would prefer to skip this patch, instead run \"$cmdline --skip\"."
 
@@ -125,7 +121,7 @@
 }
 
 prec=4
-dotest="${prefix}.dotest"
+dotest=".dotest"
 sign= utf8=t keep= skip= interactive= resolved= binary=
 resolvemsg= resume=
 git_apply_opt=
@@ -152,8 +148,8 @@
 	--skip)
 		skip=t ;;
 	-d|--dotest)
-		shift
-		case "$1" in /*) dotest=$1;; *) dotest="$prefix$1" ;; esac ;;
+		die "-d option is no longer supported.  Do not use."
+		;;
 	--resolvemsg)
 		shift; resolvemsg=$1 ;;
 	--whitespace)
@@ -189,7 +185,7 @@
 	0,)
 		# No file input but without resume parameters; catch
 		# user error to feed us a patch from standard input
-		# when there is already .dotest.  This is somewhat
+		# when there is already $dotest.  This is somewhat
 		# unreliable -- stdin could be /dev/null for example
 		# and the caller did not intend to feed us a patch but
 		# wanted to continue unattended.