[PATCH] Return error when not checking out an entry due to dirtiness.

Without -f flag, 'git-checkout-index foo.c' issued an error message
when foo.c already existed in the working tree and did not match index.
However it did not return an error from the underlying checkout_entry()
function and resulted in a successful exit(0).

Signed-off-by: Junio C Hamano <redacted>

---

 * I've made sure that the existing scripts do not use
   checkout-index without -f in a way that could be affected by
   this change.  However, third-party scripts may be affected by
   this.  Cogito and StGIT should be OK -- they either run
   checkout with -f, do not check the error return when it does
   not use -f, or runs checkout without -f in an empty working
   tree.

 checkout-index.c |   11 ++++++++---
 entry.c          |    2 +-
 2 files changed, 9 insertions(+), 4 deletions(-)

5a166f6a9d1b7ca2de673139fbfc4112b1b2e308

diff --git a/checkout-index.c b/checkout-index.c
--- a/checkout-index.c
+++ b/checkout-index.c

@@ -63,15 +63,20 @@ static int checkout_file(const char *nam
 
 static int checkout_all(void)
 {
-	int i;
+	int i, errs;
 
-	for (i = 0; i < active_nr ; i++) {
+	for (errs = i = 0; i < active_nr ; i++) {
 		struct cache_entry *ce = active_cache[i];
 		if (ce_stage(ce))
 			continue;
 		if (checkout_entry(ce, &state) < 0)
-			return -1;
+			errs++;
 	}
+	if (errs)
+		/* we have already done our error reporting.
+		 * exit with the same code as die().
+		 */
+		exit(128);
 	return 0;
 }
 

diff --git a/entry.c b/entry.c
--- a/entry.c
+++ b/entry.c

@@ -132,7 +132,7 @@ int checkout_entry(struct cache_entry *c
 		if (!state->force) {
 			if (!state->quiet)
 				fprintf(stderr, "git-checkout-index: %s already exists\n", path);
-			return 0;
+			return -1;
 		}
 
 		/*