From: Torsten Bögershausen <tboegi@xxxxxx>
Under macOS, `git ls-files path` does not work (gives an error)
if the absolute 'path' contains characters in NFD (decomposed).
This happens when core.precomposeunicode is true, which is the
most common case. The bug report says:
$ cd somewhere # some safe place, /tmp or ~/tmp etc.
$ mkdir $'u\xcc\x88' # ü in NFD
$ cd ü # or cd $'u\xcc\x88' or cd $'\xc3\xbc'
$ git init
$ git ls-files $'/somewhere/u\xcc\x88' # NFD
fatal: /somewhere/ü: '/somewhere/ü' is outside repository at '/somewhere/ü'
$ git ls-files $'/somewhere/\xc3\xbc' # NFC
(the same error as above)
In the 'fatal:' error message, there are three ü;
the 1st and 2nd are in NFC, the 3rd is in NFD.
This commit adds a test case that follows the bug report,
with the simplification that the 'ü' is replaced by an 'ä',
which is already used as NFD and NFC in t0050.
The solution is to precompose the result of getcwd(), if needed.
One possible implementation would be to re-define getcwd() similar
to opendir(), readdir() and closedir().
Since there is already a strbuf wrapper around getcwd(), and only this
wrapper is used inside the whole codebase, equip strbuf_getcwd() with
a call to the newly created function precompose_strbuf_if_needed().
Note that precompose_strbuf_if_needed() is a function under macOS,
and is a "no-op" on all other systems.
Reported-by: Jun T <takimoto-j@xxxxxxxxxxxxxxxxx>
Signed-off-by: Torsten Bögershausen <tboegi@xxxxxx>
---
compat/precompose_utf8.c | 10 ++++++++++
compat/precompose_utf8.h | 1 +
git-compat-util.h | 1 +
strbuf.c | 1 +
t/t0050-filesystem.sh | 11 +++++++++++
5 files changed, 24 insertions(+)
Thanks everybody for the review, which makes V2 much better.
diff --git a/compat/precompose_utf8.c b/compat/precompose_utf8.c
index 0bd5c24250..5a7c90c90d 100644
--- a/compat/precompose_utf8.c
+++ b/compat/precompose_utf8.c
@@ -94,6 +94,16 @@ const char *precompose_string_if_needed(const char *in)
return in;
}
+void precompose_strbuf_if_needed(struct strbuf *sb)
+{
+ char *buf_prec = (char *)precompose_string_if_needed(sb->buf);
+ if (buf_prec != sb->buf) {
+ size_t buf_prec_len = strlen(buf_prec);
+ free(strbuf_detach(sb, NULL));
+ strbuf_attach(sb, buf_prec, buf_prec_len, buf_prec_len + 1);
+ }
+}
+
const char *precompose_argv_prefix(int argc, const char **argv, const char *prefix)
{
int i = 0;
diff --git a/compat/precompose_utf8.h b/compat/precompose_utf8.h
index fea06cf28a..7c3cfcadb0 100644
--- a/compat/precompose_utf8.h
+++ b/compat/precompose_utf8.h
@@ -30,6 +30,7 @@ typedef struct {
const char *precompose_argv_prefix(int argc, const char **argv, const char *prefix);
const char *precompose_string_if_needed(const char *in);
+void precompose_strbuf_if_needed(struct strbuf *sb);
void probe_utf8_pathname_composition(void);
PREC_DIR *precompose_utf8_opendir(const char *dirname);
diff --git a/git-compat-util.h b/git-compat-util.h
index ca7678a379..892e1f9067 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -344,6 +344,7 @@ static inline const char *precompose_string_if_needed(const char *in)
return in;
}
+#define precompose_strbuf_if_needed(a)
#define probe_utf8_pathname_composition()
#endif
diff --git a/strbuf.c b/strbuf.c
index 0d929e4e19..d5b4b3903a 100644
--- a/strbuf.c
+++ b/strbuf.c
@@ -592,6 +592,7 @@ int strbuf_getcwd(struct strbuf *sb)
strbuf_grow(sb, guessed_len);
if (getcwd(sb->buf, sb->alloc)) {
strbuf_setlen(sb, strlen(sb->buf));
+ precompose_strbuf_if_needed(sb);
return 0;
}
diff --git a/t/t0050-filesystem.sh b/t/t0050-filesystem.sh
index 325eb1c3cd..a24ec866d1 100755
--- a/t/t0050-filesystem.sh
+++ b/t/t0050-filesystem.sh
@@ -156,4 +156,15 @@ test_expect_success CASE_INSENSITIVE_FS 'checkout with no pathspec and a case in
)
'
+test_expect_success 'git ls-files under NFD' '
+ (
+ mkdir -p somewhere/$aumlcdiar &&
+ mypwd=$PWD &&
+ cd somewhere/$aumlcdiar &&
+ git init &&
+ git --literal-pathspecs ls-files "$mypwd/somewhere/$aumlcdiar" 2>err &&
+ >expected &&
+ test_cmp expected err
+ )
+'
test_done
--
2.41.0.394.ge43f4fd0bd
