[PATCH v2] fetch: don't output non-errors on stderr

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Change git-fetch to only print to stderr if it has encountered an
error. A normal branch update (like "* branch HEAD -> FETCH_HEAD") is
no longer output to stderr but on stdout. Genuine errors (like
"[rejected]" messages) still go to stderr.

With this change I can run a cron script I've been developing
(http://github.com/avar/github-backup) without redirecting stderr to
/dev/null.

Before the change error messages were drowned out by git-fetch's
non-error update notices, which didn't need my attention.

The changes in t/t5521-pull-options.sh invert the previously tested
for behavior of checking if normal messages are output on stderr. The
changes in t/t5510-fetch.sh however contain no behavioral changes,
just assertions that will break if git fetch's behavior is changed
again.

There still aren't tests for some of the errors output by
builtin/fetch.c's update_local_ref function.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
---

On Thu, Jun 24, 2010 at 22:34, Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx> wrote:

> The small changes to the test suite that this requires is a testiment
> to how bad our test coverage is in this area. As far as I can see the
> error messages that update_local_ref can emit aren't being tested
> for. Fixing that is outside the scope of this patch, however.

Here's an updated patch that has a some of those supposedly out of
scope tests. The new tests have the same behavior, but will start
breaking if this behavior is changed again.

 builtin/fetch.c         |    5 ++-
 t/t5510-fetch.sh        |   57 +++++++++++++++++++++++++++++++++-------------
 t/t5521-pull-options.sh |   12 +++++-----
 3 files changed, 50 insertions(+), 24 deletions(-)

diff --git a/builtin/fetch.c b/builtin/fetch.c
index 5cb369c..116b322 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -397,13 +397,14 @@ static int store_updated_refs(const char *raw_url, const char *remote_name,
 				TRANSPORT_SUMMARY_WIDTH, *kind ? kind : "branch",
 				 REFCOL_WIDTH, *what ? what : "HEAD");
 		if (*note) {
+			FILE *fout = rc ? stderr : stdout;
 			if (verbosity >= 0 && !shown_url) {
-				fprintf(stderr, "From %.*s\n",
+				fprintf(fout, "From %.*s\n",
 						url_len, url);
 				shown_url = 1;
 			}
 			if (verbosity >= 0)
-				fprintf(stderr, " %s\n", note);
+				fprintf(fout, " %s\n", note);
 		}
 	}
 	free(url);
diff --git a/t/t5510-fetch.sh b/t/t5510-fetch.sh
index 4eb10f6..808b256 100755
--- a/t/t5510-fetch.sh
+++ b/t/t5510-fetch.sh
@@ -51,7 +51,9 @@ test_expect_success "fetch test" '
 	echo >file updated by origin &&
 	git commit -a -m "updated by origin" &&
 	cd two &&
-	git fetch &&
+	git fetch >out 2>err &&
+	test ! -s err &&
+	test -s out &&
 	test -f .git/refs/heads/one &&
 	mine=`git rev-parse refs/heads/one` &&
 	his=`cd ../one && git rev-parse refs/heads/master` &&
@@ -61,7 +63,9 @@ test_expect_success "fetch test" '
 test_expect_success "fetch test for-merge" '
 	cd "$D" &&
 	cd three &&
-	git fetch &&
+	git fetch >out 2>err &&
+	test ! -s err &&
+	test -s out &&
 	test -f .git/refs/heads/two &&
 	test -f .git/refs/heads/one &&
 	master_in_two=`cd ../two && git rev-parse master` &&
@@ -81,7 +85,9 @@ test_expect_success 'fetch tags when there is no tags' '
     cd notags &&
     git init &&
 
-    git fetch -t ..
+    git fetch -t .. >out 2>err &&
+    test ! -s err &&
+    test ! -s out
 
 '
 
@@ -95,7 +101,10 @@ test_expect_success 'fetch following tags' '
 	cd four &&
 	git init &&
 
-	git fetch .. :track &&
+	git fetch .. :track >out 2>err &&
+	test ! -s err &&
+	test -s out &&
+
 	git show-ref --verify refs/tags/anno &&
 	git show-ref --verify refs/tags/light
 
@@ -109,8 +118,9 @@ test_expect_success 'fetch must not resolve short tag name' '
 	cd five &&
 	git init &&
 
-	test_must_fail git fetch .. anno:five
-
+	! git fetch .. anno:five >out 2>err &&
+	test -s err &&
+	test ! -s out
 '
 
 test_expect_success 'fetch must not resolve short remote name' '
@@ -122,7 +132,9 @@ test_expect_success 'fetch must not resolve short remote name' '
 	cd six &&
 	git init &&
 
-	test_must_fail git fetch .. six:six
+	! git fetch .. six:six >out 2>err &&
+	test -s err &&
+	test ! -s out
 
 '
 
@@ -148,7 +160,9 @@ test_expect_success 'create bundle 2' '
 test_expect_success 'unbundle 1' '
 	cd "$D/bundle" &&
 	git checkout -b some-branch &&
-	test_must_fail git fetch "$D/bundle1" master:master
+	! git fetch "$D/bundle1" master:master >out 2>err &&
+	test -s err &&
+	test ! -s out
 '
 
 
@@ -167,7 +181,9 @@ test_expect_success 'bundle 1 has only 3 files ' '
 
 test_expect_success 'unbundle 2' '
 	cd "$D/bundle" &&
-	git fetch ../bundle2 master:master &&
+	git fetch ../bundle2 master:master >out 2>err &&
+	test ! -s err &&
+	test -s out &&
 	test "tip" = "$(git log -1 --pretty=oneline master | cut -b42-)"
 '
 
@@ -203,7 +219,9 @@ test_expect_success 'fetch via rsync' '
 	mkdir rsynced &&
 	(cd rsynced &&
 	 git init --bare &&
-	 git fetch "rsync:$(pwd)/../.git" master:refs/heads/master &&
+	 git fetch "rsync:$(pwd)/../.git" master:refs/heads/master >out 2>err &&
+	 test ! -s err &&
+	 test -s out &&
 	 git gc --prune &&
 	 test $(git rev-parse master) = $(cd .. && git rev-parse master) &&
 	 git fsck --full)
@@ -237,14 +255,17 @@ test_expect_success 'fetch with a non-applying branch.<name>.merge' '
 	git config branch.master.merge refs/heads/bigfoot &&
 	git config remote.blub.url one &&
 	git config remote.blub.fetch "refs/heads/*:refs/remotes/one/*" &&
-	git fetch blub
+	git fetch blub >out 2>err &&
+	test ! -s err &&
+	test -s out
 '
 
 # the strange name is: a\!'b
 test_expect_success 'quoting of a strangely named repo' '
-	test_must_fail git fetch "a\\!'\''b" > result 2>&1 &&
-	cat result &&
-	grep "fatal: '\''a\\\\!'\''b'\''" result
+	test_must_fail git fetch "a\\!'\''b" >out 2>err &&
+	test -s err &&
+	test ! -s out &&
+	grep "fatal: '\''a\\\\!'\''b'\''" err
 '
 
 test_expect_success 'bundle should record HEAD correctly' '
@@ -267,7 +288,9 @@ test_expect_success 'explicit fetch should not update tracking' '
 	(
 		cd three &&
 		o=$(git rev-parse --verify refs/remotes/origin/master) &&
-		git fetch origin master &&
+		git fetch origin master >out 2>err &&
+		test ! -s err &&
+		test -s out &&
 		n=$(git rev-parse --verify refs/remotes/origin/master) &&
 		test "$o" = "$n" &&
 		test_must_fail git rev-parse --verify refs/remotes/origin/side
@@ -295,7 +318,9 @@ test_expect_success 'configured fetch updates tracking' '
 	(
 		cd three &&
 		o=$(git rev-parse --verify refs/remotes/origin/master) &&
-		git fetch origin &&
+		git fetch origin  >out 2>err &&
+		test ! -s err &&
+		test -s out &&
 		n=$(git rev-parse --verify refs/remotes/origin/master) &&
 		test "$o" != "$n" &&
 		git rev-parse --verify refs/remotes/origin/side
diff --git a/t/t5521-pull-options.sh b/t/t5521-pull-options.sh
index 1b06691..7ec36e7 100755
--- a/t/t5521-pull-options.sh
+++ b/t/t5521-pull-options.sh
@@ -23,16 +23,16 @@ test_expect_success 'git pull' '
 	mkdir cloned &&
 	(cd cloned && git init &&
 	git pull "../parent" >out 2>err &&
-	test -s err &&
-	test ! -s out)
+	test ! -s err &&
+	test -s out)
 '
 
 test_expect_success 'git pull -v' '
 	mkdir clonedv &&
 	(cd clonedv && git init &&
 	git pull -v "../parent" >out 2>err &&
-	test -s err &&
-	test ! -s out)
+	test ! -s err &&
+	test -s out)
 '
 
 test_expect_success 'git pull -v -q' '
@@ -47,8 +47,8 @@ test_expect_success 'git pull -q -v' '
 	mkdir clonedqv &&
 	(cd clonedqv && git init &&
 	git pull -q -v "../parent" >out 2>err &&
-	test ! -s out &&
-	test -s err)
+	test ! -s err &&
+	test -s out)
 '
 
 test_expect_success 'git pull --force' '
-- 
1.7.1.251.g92a7

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