Subject: Re: [PATCH] shortlog: initialize nongit variable

From: SZEDER Gábor <[email-masked]>
Date: Tue, 25 Mar 2008 17:03:56 +0100

On Tue, Mar 25, 2008 at 10:39:38PM +0700, Nguyen Thai Ngoc Duy wrote:
> On Tue, Mar 25, 2008 at 9:46 PM, SZEDER Gábor <[email-masked]> wrote:
> > setup_git_directory_gently() only modifies the value of the nongit
> >  variable if we are not in a git repository, therefore nongit is left
> >  uninitialized if we are in a git repository.  This sometimes broke
> >  shortlog when it was not fed with a log on its standard input.
> 
> cmd_help() has the same problem. Can you make a similar patch for
> cmd_help as well?
Yes, I saw that, too, but:

While it's true that cmd_help()'s nongit variable will not be
initialized if we are in a git repository, cmd_help() never touches
nongit after calling setup_git_directory_gently(), so there is no
problem after all.

However, it might be better to let setup_git_directory_gently() set
*nongit_ok to 0 if we are in a git repository.  Patch appended.

Regards,
Gábor

Always set *nongit_ok in setup_git_directory_gently()

setup_git_directory_gently() only modified the value of its *nongit_ok
argument if we were not in a git repository.  Now it will always set it
to 0 when we are inside a repository.

Also remove now unnecessary initializations in the callers of this
function.

Signed-off-by: SZEDER Gábor <[email-masked]>
---
 builtin-bundle.c     |    2 +-
 builtin-config.c     |    2 +-
 builtin-diff-files.c |    2 +-
 builtin-ls-remote.c  |    2 +-
 git.c                |    2 +-
 setup.c              |    8 ++++++++
 6 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/builtin-bundle.c b/builtin-bundle.c
index 9f38e21..ac476e7 100644
--- a/builtin-bundle.c
+++ b/builtin-bundle.c
@@ -14,7 +14,7 @@ static const char *bundle_usage="git-bundle (create <bundle> <git-rev-list args>
 int cmd_bundle(int argc, const char **argv, const char *prefix)
 {
 	struct bundle_header header;
-	int nongit = 0;
+	int nongit;
 	const char *cmd, *bundle_file;
 	int bundle_fd = -1;
 	char buffer[PATH_MAX];
diff --git a/builtin-config.c b/builtin-config.c
index 2b9a426..c34bc8b 100644
--- a/builtin-config.c
+++ b/builtin-config.c
@@ -264,7 +264,7 @@ static int get_colorbool(int argc, const char **argv)
 
 int cmd_config(int argc, const char **argv, const char *prefix)
 {
-	int nongit = 0;
+	int nongit;
 	char* value;
 	const char *file = setup_git_directory_gently(&nongit);
 
diff --git a/builtin-diff-files.c b/builtin-diff-files.c
index 4abe3c2..e2306c1 100644
--- a/builtin-diff-files.c
+++ b/builtin-diff-files.c
@@ -16,7 +16,7 @@ COMMON_DIFF_OPTIONS_HELP;
 int cmd_diff_files(int argc, const char **argv, const char *prefix)
 {
 	struct rev_info rev;
-	int nongit = 0;
+	int nongit;
 	int result;
 
 	prefix = setup_git_directory_gently(&nongit);
diff --git a/builtin-ls-remote.c b/builtin-ls-remote.c
index 8907a89..06ab8da 100644
--- a/builtin-ls-remote.c
+++ b/builtin-ls-remote.c
@@ -31,7 +31,7 @@ int cmd_ls_remote(int argc, const char **argv, const char *prefix)
 {
 	int i;
 	const char *dest = NULL;
-	int nongit = 0;
+	int nongit;
 	unsigned flags = 0;
 	const char *uploadpack = NULL;
 	const char **pattern = NULL;
diff --git a/git.c b/git.c
index 13de801..70458af 100644
--- a/git.c
+++ b/git.c
@@ -142,7 +142,7 @@ static int split_cmdline(char *cmdline, const char ***argv)
 
 static int handle_alias(int *argcp, const char ***argv)
 {
-	int nongit = 0, envchanged = 0, ret = 0, saved_errno = errno;
+	int nongit, envchanged = 0, ret = 0, saved_errno = errno;
 	const char *subdir;
 	int count, option_count;
 	const char** new_argv;
diff --git a/setup.c b/setup.c
index 41e298b..3d2d958 100644
--- a/setup.c
+++ b/setup.c
@@ -326,6 +326,14 @@ const char *setup_git_directory_gently(int *nongit_ok)
 	int len, offset;
 
 	/*
+	 * Let's assume that we are in a git repository.
+	 * If it turns out later that we are somewhere else, the value will be
+	 * updated accordingly.
+	 */
+	if (nongit_ok)
+		*nongit_ok = 0;
+
+	/*
 	 * If GIT_DIR is set explicitly, we're not going
 	 * to do any discovery, but we still do repository
 	 * validation.
-- 
1.5.5.rc1