am, rebase: teach quiet option

git-am and git-rebase are talkative scripts. Teach them to be quiet when
told, allowing them to speak only when they fail or experience errors.

The quiet option is maintained when git-am or git-rebase fails to apply
a patch. This means subsequent --resolved, --continue, --skip, --abort
invocations will be quiet if the original invocation was quiet.

Drop a handful of >&2 redirection; the rest of the program sends all the
info messages to stdout, not to stderr.

Signed-off-by: Stephen Boyd <bebarino@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 19 insertions, 7 deletions

diff --git a/git-am.sh b/git-am.sh
index e26c54a3e..58d4eb6d2 100755
--- a/git-am.sh
+++ b/git-am.sh
@@ -11,6 +11,7 @@ git am [options] (--resolved | --skip | --abort)
 i,interactive   run interactively
 b,binary*       (historical option -- no-op)
 3,3way          allow fall back on 3way merging if needed
+q,quiet         be quiet
 s,signoff       add a Signed-off-by line to the commit message
 u,utf8          recode into utf8 (default)
 k,keep          pass -k flag to git-mailinfo
@@ -99,7 +100,7 @@ fall_back_3way () {
     git write-tree >"$dotest/patch-merge-base+" ||
     cannot_fallback "Repository lacks necessary blobs to fall back on 3-way merge."
 
-    echo Using index info to reconstruct a base tree...
+    say Using index info to reconstruct a base tree...
     if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
 	git apply --cached <"$dotest/patch"
     then
@@ -115,7 +116,7 @@ It does not apply to blobs recorded in its index."
     orig_tree=$(cat "$dotest/patch-merge-base") &&
     rm -fr "$dotest"/patch-merge-* || exit 1
 
-    echo Falling back to patching base and 3-way merge...
+    say Falling back to patching base and 3-way merge...
 
     # This is not so wrong.  Depending on which base we picked,
     # orig_tree may be wildly different from ours, but his_tree
@@ -125,6 +126,10 @@ It does not apply to blobs recorded in its index."
 
     eval GITHEAD_$his_tree='"$FIRSTLINE"'
     export GITHEAD_$his_tree
+    if test -n "$GIT_QUIET"
+    then
+	    export GIT_MERGE_VERBOSITY=0
+    fi
     git-merge-recursive $orig_tree -- HEAD $his_tree || {
 	    git rerere
 	    echo Failed to merge in the changes.
@@ -181,6 +186,8 @@ do
 		committer_date_is_author_date=t ;;
 	--ignore-date)
 		ignore_date=t ;;
+	-q|--quiet)
+		GIT_QUIET=t ;;
 	--)
 		shift; break ;;
 	*)
@@ -279,7 +286,7 @@ else
 		exit 1
 	}
 
-	# -s, -u, -k, --whitespace, -3, -C and -p flags are kept
+	# -s, -u, -k, --whitespace, -3, -C, -q and -p flags are kept
 	# for the resuming session after a patch failure.
 	# -i can and must be given when resuming.
 	echo " $git_apply_opt" >"$dotest/apply-opt"
@@ -287,6 +294,7 @@ else
 	echo "$sign" >"$dotest/sign"
 	echo "$utf8" >"$dotest/utf8"
 	echo "$keep" >"$dotest/keep"
+	echo "$GIT_QUIET" >"$dotest/quiet"
 	echo 1 >"$dotest/next"
 	if test -n "$rebasing"
 	then
@@ -327,6 +335,10 @@ if test "$(cat "$dotest/keep")" = t
 then
 	keep=-k
 fi
+if test "$(cat "$dotest/quiet")" = t
+then
+	GIT_QUIET=t
+fi
 if test "$(cat "$dotest/threeway")" = t
 then
 	threeway=t
@@ -352,7 +364,7 @@ fi
 
 if test "$this" -gt "$last"
 then
-	echo Nothing to do.
+	say Nothing to do.
 	rm -fr "$dotest"
 	exit
 fi
@@ -498,7 +510,7 @@ do
 		stop_here $this
 	fi
 
-	printf 'Applying: %s\n' "$FIRSTLINE"
+	say "Applying: $FIRSTLINE"
 
 	case "$resolved" in
 	'')
@@ -541,7 +553,7 @@ do
 		    # Applying the patch to an earlier tree and merging the
 		    # result may have produced the same tree as ours.
 		    git diff-index --quiet --cached HEAD -- && {
-			echo No changes -- Patch already applied.
+			say No changes -- Patch already applied.
 			go_next
 			continue
 		    }
@@ -567,7 +579,7 @@ do
 			GIT_AUTHOR_DATE=
 		fi
 		parent=$(git rev-parse --verify -q HEAD) ||
-		echo >&2 "applying to an empty history"
+		say >&2 "applying to an empty history"
 
 		if test -n "$committer_date_is_author_date"
 		then