t: fix some trivial cases of ignored exit codes in loops

These are all cases where we do a setup step of the form:

  for i in $foo; do
	  set_up $i || break
  done &&
  more_setup

would not notice a failure in set_up (because break always
returns a 0 exit code). These are just setup steps that we
do not expect to fail, but it does not hurt to be defensive.

Most can be fixed by converting the "break" to a "return 1"
(since we eval our tests inside a function for just this
purpose). A few of the loops are inside subshells, so we can
use just "exit 1" to break out of the subshell. And a few
can actually be made shorter by just unrolling the loop.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t3010-ls-files-killed-modified.sh

@@ -55,13 +55,10 @@ test_expect_success 'git update-index --add to add various paths.' '
 	: >path9 &&
 	date >path10 &&
 	git update-index --add -- path0 path?/file? pathx/ju path7 path8 path9 path10 &&
-	for i in 1 2
-	do
-		git init submod$i &&
-		(
-			cd submod$i && git commit --allow-empty -m "empty $i"
-		) || break
-	done &&
+	git init submod1 &&
+	git -C submod1 commit --allow-empty -m "empty 1" &&
+	git init submod2 &&
+	git -C submod2 commit --allow-empty -m "empty 2" &&
 	git update-index --add submod[12] &&
 	(
 		cd submod1 &&

t/t3031-merge-criscross.sh

@@ -32,7 +32,7 @@ test_expect_success 'setup repo with criss-cross history' '
 	do
 		echo $n > data/$n &&
 		n=$(($n+1)) ||
-		break
+		return 1
 	done &&
 
 	# check them in

t/t3202-show-branch-octopus.sh

@@ -19,7 +19,7 @@ test_expect_success 'setup' '
 		> file$i &&
 		git add file$i &&
 		test_tick &&
-		git commit -m branch$i || break
+		git commit -m branch$i || return 1
 	done
 
 '

t/t4024-diff-optimize-common.sh

@@ -139,7 +139,7 @@ test_expect_success setup '
 		( printf C; zs $n ) >file-c$n &&
 		( echo D; zs $n ) >file-d$n &&
 
-		expect_pattern $n || break
+		expect_pattern $n || return 1
 
 	done >expect
 '

t/t4046-diff-unmerged.sh

@@ -8,7 +8,7 @@ test_expect_success setup '
 	do
 		blob=$(echo $i | git hash-object --stdin) &&
 		eval "blob$i=$blob" &&
-		eval "m$i=\"100644 \$blob$i $i\"" || break
+		eval "m$i=\"100644 \$blob$i $i\"" || return 1
 	done &&
 	paths= &&
 	for b in o x
@@ -24,9 +24,9 @@ test_expect_success setup '
 				case "$b" in x) echo "$m1$p" ;; esac &&
 				case "$o" in x) echo "$m2$p" ;; esac &&
 				case "$t" in x) echo "$m3$p" ;; esac ||
-				break
-			done || break
-		done || break
+				return 1
+			done
+		done
 	done >ls-files-s.expect &&
 	git update-index --index-info <ls-files-s.expect &&
 	git ls-files -s >ls-files-s.actual &&

t/t4151-am-abort.sh

@@ -20,7 +20,7 @@ test_expect_success setup '
 		echo $i >otherfile-$i &&
 		git add otherfile-$i &&
 		test_tick &&
-		git commit -a -m $i || break
+		git commit -a -m $i || return 1
 	done &&
 	git format-patch --no-numbered initial &&
 	git checkout -b side initial &&

t/t5505-remote.sh

@@ -579,7 +579,7 @@ test_expect_success 'update with arguments' '
 		cd one &&
 		for b in $(git branch -r)
 		do
-		git branch -r -d $b || break
+		git branch -r -d $b || exit 1
 		done &&
 		git remote add manduca ../mirror &&
 		git remote add megaloprepus ../mirror &&
@@ -622,7 +622,7 @@ test_expect_success 'update default' '
 		cd one &&
 		for b in $(git branch -r)
 		do
-		git branch -r -d $b || break
+		git branch -r -d $b || exit 1
 		done &&
 		git config remote.drosophila.skipDefaultUpdate true &&
 		git remote update default &&
@@ -642,7 +642,7 @@ test_expect_success 'update default (overridden, with funny whitespace)' '
 		cd one &&
 		for b in $(git branch -r)
 		do
-		git branch -r -d $b || break
+		git branch -r -d $b || exit 1
 		done &&
 		git config remotes.default "$(printf "\t drosophila  \n")" &&
 		git remote update default &&
@@ -656,7 +656,7 @@ test_expect_success 'update (with remotes.default defined)' '
 		cd one &&
 		for b in $(git branch -r)
 		do
-		git branch -r -d $b || break
+		git branch -r -d $b || exit 1
 		done &&
 		git config remotes.default "drosophila" &&
 		git remote update &&

t/t5514-fetch-multiple.sh

@@ -120,7 +120,7 @@ test_expect_success 'git fetch --all (skipFetchAll)' '
 	(cd test4 &&
 	 for b in $(git branch -r)
 	 do
-		git branch -r -d $b || break
+		git branch -r -d $b || exit 1
 	 done &&
 	 git remote add three ../three &&
 	 git config remote.three.skipFetchAll true &&
@@ -144,7 +144,7 @@ test_expect_success 'git fetch --multiple (ignoring skipFetchAll)' '
 	(cd test4 &&
 	 for b in $(git branch -r)
 	 do
-		git branch -r -d $b || break
+		git branch -r -d $b || exit 1
 	 done &&
 	 git fetch --multiple one two three &&
 	 git branch -r > output &&

t/t6026-merge-attr.sh

@@ -11,23 +11,23 @@ test_expect_success setup '
 
 	for f in text binary union
 	do
-		echo Initial >$f && git add $f || break
+		echo Initial >$f && git add $f || return 1
 	done &&
 	test_tick &&
 	git commit -m Initial &&
 
 	git branch side &&
 	for f in text binary union
 	do
-		echo Master >>$f && git add $f || break
+		echo Master >>$f && git add $f || return 1
 	done &&
 	test_tick &&
 	git commit -m Master &&
 
 	git checkout side &&
 	for f in text binary union
 	do
-		echo Side >>$f && git add $f || break
+		echo Side >>$f && git add $f || return 1
 	done &&
 	test_tick &&
 	git commit -m Side &&

t/t6040-tracking-info.sh

@@ -12,10 +12,9 @@ advance () {
 }
 
 test_expect_success setup '
-	for i in a b c;
-	do
-		advance $i || break
-	done &&
+	advance a &&
+	advance b &&
+	advance c &&
 	git clone . test &&
 	(
 		cd test &&