tree-diff: remove special-case diff-emitting code for empty-tree cases

diff --git a/git-am.sh b/git-am.sh
index 202130f888bee14e73b8cc108f39f2da8a14d23b..bbea43075be030c272ef0d8e4cb9c25a179d4e53 100755 (executable)
--- a/git-am.sh
+++ b/git-am.sh
@@ -6,7 +6,7 @@ SUBDIRECTORY_OK=Yes
 OPTIONS_KEEPDASHDASH=
 OPTIONS_SPEC="\
 git am [options] [(<mbox>|<Maildir>)...]
-git am [options] (--resolved | --skip | --abort)
+git am [options] (--continue | --skip | --abort)
 --
 i,interactive   run interactively
 b,binary*       (historical option -- no-op)
@@ -102,7 +102,7 @@ stop_here_user_resolve () {
            printf '%s\n' "$resolvemsg"
            stop_here $1
     fi
-    eval_gettextln "When you have resolved this problem, run \"\$cmdline --resolved\".
+    eval_gettextln "When you have resolved this problem, run \"\$cmdline --continue\".
 If you prefer to skip this patch, run \"\$cmdline --skip\" instead.
 To restore the original branch and stop patching, run \"\$cmdline --abort\"."
 
@@ -302,7 +302,7 @@ split_patches () {
                        # not starting with Author, From or Date is the
                        # subject, and the body starts with the next nonempty
                        # line not starting with Author, From or Date
-                       perl -ne 'BEGIN { $subject = 0 }
+                       @@PERL@@ -ne 'BEGIN { $subject = 0 }
                                if ($subject > 1) { print ; }
                                elsif (/^\s+$/) { next ; }
                                elsif (/^Author:/) { s/Author/From/ ; print ;}
@@ -334,7 +334,7 @@ split_patches () {
                        # Since we cannot guarantee that the commit message is in
                        # git-friendly format, we put no Subject: line and just consume
                        # all of the message as the body
-                       LANG=C LC_ALL=C perl -M'POSIX qw(strftime)' -ne 'BEGIN { $subject = 0 }
+                       LANG=C LC_ALL=C @@PERL@@ -M'POSIX qw(strftime)' -ne 'BEGIN { $subject = 0 }
                                if ($subject) { print ; }
                                elsif (/^\# User /) { s/\# User/From:/ ; print ; }
                                elsif (/^\# Date /) {
@@ -446,6 +446,8 @@ done
 # If the dotest directory exists, but we have finished applying all the
 # patches in them, clear it out.
 if test -d "$dotest" &&
+   test -f "$dotest/last" &&
+   test -f "$dotest/next" &&
    last=$(cat "$dotest/last") &&
    next=$(cat "$dotest/next") &&
    test $# != 0 &&
@@ -454,7 +456,7 @@ then
    rm -fr "$dotest"
 fi
 
-if test -d "$dotest"
+if test -d "$dotest" && test -f "$dotest/last" && test -f "$dotest/next"
 then
        case "$#,$skip$resolved$abort" in
        0,*t*)
@@ -504,7 +506,24 @@ then
        esac
        rm -f "$dotest/dirtyindex"
 else
-       # Make sure we are not given --skip, --resolved, nor --abort
+       # Possible stray $dotest directory in the independent-run
+       # case; in the --rebasing case, it is upto the caller
+       # (git-rebase--am) to take care of stray directories.
+       if test -d "$dotest" && test -z "$rebasing"
+       then
+               case "$skip,$resolved,$abort" in
+               ,,t)
+                       rm -fr "$dotest"
+                       exit 0
+                       ;;
+               *)
+                       die "$(eval_gettext "Stray \$dotest directory found.
+Use \"git am --abort\" to remove it.")"
+                       ;;
+               esac
+       fi
+
+       # Make sure we are not given --skip, --continue, nor --abort
        test "$skip$resolved$abort" = "" ||
                die "$(gettext "Resolve operation not in progress, we are not resuming.")"
 
@@ -651,7 +670,7 @@ do
        #  - patch is the patch body.
        #
        # When we are resuming, these files are either already prepared
-       # by the user, or the user can tell us to do so by --resolved flag.
+       # by the user, or the user can tell us to do so by --continue flag.
        case "$resume" in
        '')
                if test -f "$dotest/rebasing"
@@ -778,13 +797,6 @@ To restore the original branch and stop patching run \"\$cmdline --abort\"."
            action=yes
        fi
 
-       if test -f "$dotest/final-commit"
-       then
-               FIRSTLINE=$(sed 1q "$dotest/final-commit")
-       else
-               FIRSTLINE=""
-       fi
-
        if test $action = skip
        then
                go_next
@@ -797,6 +809,13 @@ To restore the original branch and stop patching run \"\$cmdline --abort\"."
                stop_here $this
        fi
 
+       if test -f "$dotest/final-commit"
+       then
+               FIRSTLINE=$(sed 1q "$dotest/final-commit")
+       else
+               FIRSTLINE=""
+       fi
+
        say "$(eval_gettext "Applying: \$FIRSTLINE")"
 
        case "$resolved" in
@@ -904,5 +923,10 @@ if test -s "$dotest"/rewritten; then
     fi
 fi
 
-rm -fr "$dotest"
-git gc --auto
+# If am was called with --rebasing (from git-rebase--am), it's up to
+# the caller to take care of housekeeping.
+if ! test -f "$dotest/rebasing"
+then
+       rm -fr "$dotest"
+       git gc --auto
+fi