builtin/apply: make parse_single_patch() return -1 on error

To libify `git apply` functionality we have to signal errors to the
caller instead of die()ing.

To do that in a compatible manner with the rest of the error handling
in builtin/apply.c, parse_single_patch() should return a negative
integer instead of calling die().

Let's do that by using error() and let's adjust the related test
cases accordingly.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/apply.c b/builtin/apply.c
index c07d142be8e82eec8ae65375d6e4219e196f6897..10aaba77255bbf6991582a96e0a58a25e4bad1e3 100644 (file)
--- a/builtin/apply.c
+++ b/builtin/apply.c
@@ -1671,6 +1671,10 @@ static int parse_fragment(struct apply_state *state,
  *
  * The (fragment->patch, fragment->size) pair points into the memory given
  * by the caller, not a copy, when we return.
+ *
+ * Returns:
+ *   -1 in case of error,
+ *   the number of bytes in the patch otherwise.
  */
 static int parse_single_patch(struct apply_state *state,
                              const char *line,
@@ -1688,8 +1692,10 @@ static int parse_single_patch(struct apply_state *state,
                fragment = xcalloc(1, sizeof(*fragment));
                fragment->linenr = state->linenr;
                len = parse_fragment(state, line, size, patch, fragment);
-               if (len <= 0)
-                       die(_("corrupt patch at line %d"), state->linenr);
+               if (len <= 0) {
+                       free(fragment);
+                       return error(_("corrupt patch at line %d"), state->linenr);
+               }
                fragment->patch = line;
                fragment->size = len;
                oldlines += fragment->oldlines;
@@ -1725,9 +1731,9 @@ static int parse_single_patch(struct apply_state *state,
                patch->is_delete = 0;
 
        if (0 < patch->is_new && oldlines)
-               die(_("new file %s depends on old contents"), patch->new_name);
+               return error(_("new file %s depends on old contents"), patch->new_name);
        if (0 < patch->is_delete && newlines)
-               die(_("deleted file %s still has contents"), patch->old_name);
+               return error(_("deleted file %s still has contents"), patch->old_name);
        if (!patch->is_delete && !newlines && context)
                fprintf_ln(stderr,
                           _("** warning: "
@@ -2029,6 +2035,9 @@ static int parse_chunk(struct apply_state *state, char *buffer, unsigned long si
                                       size - offset - hdrsize,
                                       patch);
 
+       if (patchsize < 0)
+               return -128;
+
        if (!patchsize) {
                static const char git_binary[] = "GIT binary patch\n";
                int hd = hdrsize + offset;

diff --git a/t/t4012-diff-binary.sh b/t/t4012-diff-binary.sh
index 643d729157d23ce501258710640e4090c34922fc..0a8af76aabf5ad79193341d1ffd4be4c9d4cb7a6 100755 (executable)
--- a/t/t4012-diff-binary.sh
+++ b/t/t4012-diff-binary.sh
@@ -68,7 +68,7 @@ test_expect_success C_LOCALE_OUTPUT 'apply detecting corrupt patch correctly' '
        sed -e "s/-CIT/xCIT/" <output >broken &&
        test_must_fail git apply --stat --summary broken 2>detected &&
        detected=$(cat detected) &&
-       detected=$(expr "$detected" : "fatal.*at line \\([0-9]*\\)\$") &&
+       detected=$(expr "$detected" : "error.*at line \\([0-9]*\\)\$") &&
        detected=$(sed -ne "${detected}p" broken) &&
        test "$detected" = xCIT
 '
@@ -77,7 +77,7 @@ test_expect_success C_LOCALE_OUTPUT 'apply detecting corrupt patch correctly' '
        git diff --binary | sed -e "s/-CIT/xCIT/" >broken &&
        test_must_fail git apply --stat --summary broken 2>detected &&
        detected=$(cat detected) &&
-       detected=$(expr "$detected" : "fatal.*at line \\([0-9]*\\)\$") &&
+       detected=$(expr "$detected" : "error.*at line \\([0-9]*\\)\$") &&
        detected=$(sed -ne "${detected}p" broken) &&
        test "$detected" = xCIT
 '