Naturally, prep_temp_blob() did not care about filenames.
As a result, scripts that used GIT_EXTERNAL_DIFF or textconv
ended up with filenames such as ".diff_XXXXXX".
This modifies prep_temp_blob() to generate user-friendly
filenames when creating temporary files.
Diffing "name.ext" now generates "XXXXXX_name.ext".
Signed-off-by: David Aguilar <davvid@xxxxxxxxx>
Tested-by: Johannes Sixt <j6t@xxxxxxxx> (Windows)
---
This includes Peff's suggestion to make this the
default behavior.
Peff mentioned that: "Switching to user-friendly
temp filenames for textconv was on my todo list".
This patch accomplishes exactly that for both
textconv and GIT_EXTERNAL_DIFF.
cache.h | 2 ++
diff.c | 19 ++++++++++++++++++-
path.c | 16 ++++++++++++++++
t/t4020-diff-external.sh | 9 +++++++++
4 files changed, 45 insertions(+), 1 deletions(-)
diff --git a/cache.h b/cache.h
index b8503ad..871c984 100644
--- a/cache.h
+++ b/cache.h
@@ -614,6 +614,8 @@ extern int is_empty_blob_sha1(const unsigned char *sha1);
int git_mkstemp(char *path, size_t n, const char *template);
+int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
+
/*
* NOTE NOTE NOTE!!
*
diff --git a/diff.c b/diff.c
index dcfbcb0..85503ce 100644
--- a/diff.c
+++ b/diff.c
@@ -1964,8 +1964,24 @@ static void prep_temp_blob(const char *path, struct diff_tempfile *temp,
{
int fd;
struct strbuf buf = STRBUF_INIT;
+ struct strbuf template = STRBUF_INIT;
+ char *basename = ((char*)path) + strlen(path) - 1;
+
+ /* Windows lacks basename() */
+ while(*basename && basename > path) {
+ basename--;
+ if (is_dir_sep(*basename)) {
+ basename++;
+ break;
+ }
+ }
+
+ /* Generate "XXXXXX_basename.ext" */
+ strbuf_addstr(&template, "XXXXXX_");
+ strbuf_addstr(&template, basename);
- fd = git_mkstemp(temp->tmp_path, PATH_MAX, ".diff_XXXXXX");
+ fd = git_mkstemps(temp->tmp_path, PATH_MAX, template.buf,
+ strlen(basename) + 1);
if (fd < 0)
die("unable to create temp-file: %s", strerror(errno));
if (convert_to_working_tree(path,
@@ -1981,6 +1997,7 @@ static void prep_temp_blob(const char *path, struct diff_tempfile *temp,
temp->hex[40] = 0;
sprintf(temp->mode, "%06o", mode);
strbuf_release(&buf);
+ strbuf_release(&template);
}
static struct diff_tempfile *prepare_temp_file(const char *name,
diff --git a/path.c b/path.c
index 8a0a674..047fdb0 100644
--- a/path.c
+++ b/path.c
@@ -139,6 +139,22 @@ int git_mkstemp(char *path, size_t len, const char *template)
return mkstemp(path);
}
+/* git_mkstemps() - create tmp file with suffix honoring TMPDIR variable. */
+int git_mkstemps(char *path, size_t len, const char *template, int suffix_len)
+{
+ const char *tmp;
+ size_t n;
+
+ tmp = getenv("TMPDIR");
+ if (!tmp)
+ tmp = "/tmp";
+ n = snprintf(path, len, "%s/%s", tmp, template);
+ if (len <= n) {
+ errno = ENAMETOOLONG;
+ return -1;
+ }
+ return mkstemps(path, suffix_len);
+}
int validate_headref(const char *path)
{
diff --git a/t/t4020-diff-external.sh b/t/t4020-diff-external.sh
index 0720001..4ea42e0 100755
--- a/t/t4020-diff-external.sh
+++ b/t/t4020-diff-external.sh
@@ -136,6 +136,15 @@ test_expect_success 'GIT_EXTERNAL_DIFF with more than one changed files' '
GIT_EXTERNAL_DIFF=echo git diff
'
+test_expect_success 'GIT_EXTERNAL_DIFF generates pretty paths' '
+ touch file.ext &&
+ git add file.ext &&
+ echo with extension > file.ext &&
+ GIT_EXTERNAL_DIFF=echo git diff file.ext | grep ......_file\.ext &&
+ git update-index --force-remove file.ext &&
+ rm file.ext
+'
+
echo "#!$SHELL_PATH" >fake-diff.sh
cat >> fake-diff.sh <<\EOF
cat $2 >> crlfed.txt
--
1.6.1.3
--
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