[PATCH 1/3] format-patch: refactor output selection

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The --stdout and --output-directory options are mutually exclusive, but
it's hard to tell from reading the code. We have three separate
conditionals that check for use_stdout, and it's only after we've set up
the output_directory fully that we check whether the user also specified
--stdout.

Instead, let's check the exclusion explicitly first, then have a single
conditional that handles stdout versus an output directory. This is
slightly easier to follow now, and also will keep things sane when we
add another output mode in a future patch.

Signed-off-by: Jeff King <peff@xxxxxxxx>
---
 builtin/log.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/builtin/log.c b/builtin/log.c
index 9f939e6cdf..4c391ba3ca 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -1942,20 +1942,20 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
 	if (rev.show_notes)
 		load_display_notes(&rev.notes_opt);
 
-	if (!output_directory && !use_stdout)
-		output_directory = config_output_directory;
+	if (use_stdout + !!output_directory > 1)
+		die(_("specify only one of --stdout, --output, and --output-directory"));
 
-	if (!use_stdout)
-		output_directory = set_outdir(prefix, output_directory);
-	else
+	if (use_stdout) {
 		setup_pager();
-
-	if (output_directory) {
+	} else {
 		int saved;
+
+		if (!output_directory)
+			output_directory = config_output_directory;
+		output_directory = set_outdir(prefix, output_directory);
+
 		if (rev.diffopt.use_color != GIT_COLOR_ALWAYS)
 			rev.diffopt.use_color = GIT_COLOR_NEVER;
-		if (use_stdout)
-			die(_("standard output, or directory, which one?"));
 		/*
 		 * We consider <outdir> as 'outside of gitdir', therefore avoid
 		 * applying adjust_shared_perm in s-c-l-d.
-- 
2.29.2.559.g8ec94df761




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