git clone <url> C:\cygwin\home\USER\repo' is working (again)

A regression for cygwin users was introduced with commit 05b458c,
"real_path: resolve symlinks by hand".

In the the commit message we read:
The current implementation of real_path uses chdir() in order to resolve
symlinks.  Unfortunately this isn't thread-safe as chdir() affects a
process as a whole...

The old (and non-thread-save) OS calls chdir()/pwd() had been
replaced by a string operation.
The cygwin layer "knows" that "C:\cygwin" is an absolute path,
but the new string operation does not.

"git clone <url> C:\cygwin\home\USER\repo" fails like this:
fatal: Invalid path '/home/USER/repo/C:\cygwin\home\USER\repo'

The solution is to implement has_dos_drive_prefix(), skip_dos_drive_prefix()
is_dir_sep(), offset_1st_component() and convert_slashes() for cygwin
in the same way as it is done in 'Git for Windows' in compat/mingw.[ch]

Extract the needed code into compat/win32/path-utils.[ch] and use it
for cygwin as well.

Reported-by: Steven Penny <svnpenn@gmail.com>
Helped-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Torsten Bögershausen <tboegi@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/compat/cygwin.c b/compat/cygwin.c
deleted file mode 100644 (file)
index b9862d6..0000000
--- a/compat/cygwin.c
+++ /dev/null
@@ -1,19 +0,0 @@
-#include "../git-compat-util.h"
-#include "../cache.h"
-
-int cygwin_offset_1st_component(const char *path)
-{
-       const char *pos = path;
-       /* unc paths */
-       if (is_dir_sep(pos[0]) && is_dir_sep(pos[1])) {
-               /* skip server name */
-               pos = strchr(pos + 2, '/');
-               if (!pos)
-                       return 0; /* Error: malformed unc path */
-
-               do {
-                       pos++;
-               } while (*pos && pos[0] != '/');
-       }
-       return pos + is_dir_sep(*pos) - path;
-}

diff --git a/compat/cygwin.h b/compat/cygwin.h
deleted file mode 100644 (file)
index 8e52de4..0000000
--- a/compat/cygwin.h
+++ /dev/null
@@ -1,2 +0,0 @@
-int cygwin_offset_1st_component(const char *path);
-#define offset_1st_component cygwin_offset_1st_component

diff --git a/compat/mingw.c b/compat/mingw.c
index 18caf21969a5917e8e6c6d754beffbba2741e6c2..76cad1fe21fb00d0ca3399e2bda34bca4f0fa75c 100644 (file)
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -294,7 +294,7 @@ static inline int needs_hiding(const char *path)
                return 0;
 
        /* We cannot use basename(), as it would remove trailing slashes */
-       mingw_skip_dos_drive_prefix((char **)&path);
+       win32_skip_dos_drive_prefix((char **)&path);
        if (!*path)
                return 0;
 
@@ -2043,33 +2043,6 @@ pid_t waitpid(pid_t pid, int *status, int options)
        return -1;
 }
 
-int mingw_skip_dos_drive_prefix(char **path)
-{
-       int ret = has_dos_drive_prefix(*path);
-       *path += ret;
-       return ret;
-}
-
-int mingw_offset_1st_component(const char *path)
-{
-       char *pos = (char *)path;
-
-       /* unc paths */
-       if (!skip_dos_drive_prefix(&pos) &&
-                       is_dir_sep(pos[0]) && is_dir_sep(pos[1])) {
-               /* skip server name */
-               pos = strpbrk(pos + 2, "\\/");
-               if (!pos)
-                       return 0; /* Error: malformed unc path */
-
-               do {
-                       pos++;
-               } while (*pos && !is_dir_sep(*pos));
-       }
-
-       return pos + is_dir_sep(*pos) - path;
-}
-
 int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
 {
        int upos = 0, wpos = 0;

diff --git a/compat/mingw.h b/compat/mingw.h
index 571019d0bddceaf3245e15dbcc4ebfb70a501d17..3387c3faeb34cf053f5ff5d80e4956949690de98 100644 (file)
--- a/compat/mingw.h
+++ b/compat/mingw.h
@@ -397,32 +397,12 @@ HANDLE winansi_get_osfhandle(int fd);
  * git specific compatibility
  */
 
-#define has_dos_drive_prefix(path) \
-       (isalpha(*(path)) && (path)[1] == ':' ? 2 : 0)
-int mingw_skip_dos_drive_prefix(char **path);
-#define skip_dos_drive_prefix mingw_skip_dos_drive_prefix
-static inline int mingw_is_dir_sep(int c)
-{
-       return c == '/' || c == '\\';
-}
-#define is_dir_sep mingw_is_dir_sep
-static inline char *mingw_find_last_dir_sep(const char *path)
-{
-       char *ret = NULL;
-       for (; *path; ++path)
-               if (is_dir_sep(*path))
-                       ret = (char *)path;
-       return ret;
-}
 static inline void convert_slashes(char *path)
 {
        for (; *path; path++)
                if (*path == '\\')
                        *path = '/';
 }
-#define find_last_dir_sep mingw_find_last_dir_sep
-int mingw_offset_1st_component(const char *path);
-#define offset_1st_component mingw_offset_1st_component
 #define PATH_SEP ';'
 #if !defined(__MINGW64_VERSION_MAJOR) && (!defined(_MSC_VER) || _MSC_VER < 1800)
 #define PRIuMAX "I64u"

diff --git a/compat/win32/path-utils.c b/compat/win32/path-utils.c
new file mode 100644 (file)
index 0000000..d9d3641
--- /dev/null
+++ b/compat/win32/path-utils.c
@@ -0,0 +1,28 @@
+#include "../../git-compat-util.h"
+
+int win32_skip_dos_drive_prefix(char **path)
+{
+       int ret = has_dos_drive_prefix(*path);
+       *path += ret;
+       return ret;
+}
+
+int win32_offset_1st_component(const char *path)
+{
+       char *pos = (char *)path;
+
+       /* unc paths */
+       if (!skip_dos_drive_prefix(&pos) &&
+                       is_dir_sep(pos[0]) && is_dir_sep(pos[1])) {
+               /* skip server name */
+               pos = strpbrk(pos + 2, "\\/");
+               if (!pos)
+                       return 0; /* Error: malformed unc path */
+
+               do {
+                       pos++;
+               } while (*pos && !is_dir_sep(*pos));
+       }
+
+       return pos + is_dir_sep(*pos) - path;
+}

diff --git a/compat/win32/path-utils.h b/compat/win32/path-utils.h
new file mode 100644 (file)
index 0000000..0f70d43
--- /dev/null
+++ b/compat/win32/path-utils.h
@@ -0,0 +1,20 @@
+#define has_dos_drive_prefix(path) \
+       (isalpha(*(path)) && (path)[1] == ':' ? 2 : 0)
+int win32_skip_dos_drive_prefix(char **path);
+#define skip_dos_drive_prefix win32_skip_dos_drive_prefix
+static inline int win32_is_dir_sep(int c)
+{
+       return c == '/' || c == '\\';
+}
+#define is_dir_sep win32_is_dir_sep
+static inline char *win32_find_last_dir_sep(const char *path)
+{
+       char *ret = NULL;
+       for (; *path; ++path)
+               if (is_dir_sep(*path))
+                       ret = (char *)path;
+       return ret;
+}
+#define find_last_dir_sep win32_find_last_dir_sep
+int win32_offset_1st_component(const char *path);
+#define offset_1st_component win32_offset_1st_component

diff --git a/config.mak.uname b/config.mak.uname
index e47af72e018fc36b35de16cd65d2742fb44d9dee..d63f41d6964a95416de344efe22f442d79af7d84 100644 (file)
--- a/config.mak.uname
+++ b/config.mak.uname
@@ -187,7 +187,7 @@ ifeq ($(uname_O),Cygwin)
        UNRELIABLE_FSTAT = UnfortunatelyYes
        OBJECT_CREATION_USES_RENAMES = UnfortunatelyNeedsTo
        MMAP_PREVENTS_DELETE = UnfortunatelyYes
-       COMPAT_OBJS += compat/cygwin.o
+       COMPAT_OBJS += compat/win32/path-utils.o
        FREAD_READS_DIRECTORIES = UnfortunatelyYes
 endif
 ifeq ($(uname_S),FreeBSD)
@@ -536,6 +536,7 @@ ifneq (,$(findstring MINGW,$(uname_S)))
        COMPAT_CFLAGS += -DNOGDI -Icompat -Icompat/win32
        COMPAT_CFLAGS += -DSTRIP_EXTENSION=\".exe\"
        COMPAT_OBJS += compat/mingw.o compat/winansi.o \
+               compat/win32/path-utils.o \
                compat/win32/pthread.o compat/win32/syslog.o \
                compat/win32/dirent.o
        BASIC_CFLAGS += -DWIN32 -DPROTECT_NTFS_DEFAULT=1

diff --git a/git-compat-util.h b/git-compat-util.h
index 5f2e90932f9990419d75d803d9552acf2f14adef..925a8ae72b265ecbf8537ca5a2628490eff7f375 100644 (file)
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -190,10 +190,11 @@
 #endif
 
 #if defined(__CYGWIN__)
-#include "compat/cygwin.h"
+#include "compat/win32/path-utils.h"
 #endif
 #if defined(__MINGW32__)
 /* pull in Windows compatibility stuff */
+#include "compat/win32/path-utils.h"
 #include "compat/mingw.h"
 #elif defined(_MSC_VER)
 #include "compat/msvc.h"

diff --git a/t/t5601-clone.sh b/t/t5601-clone.sh
index ddaa96ac4f44a4e4799aa509b3bd69bc28628d60..f83a637194e977a6db358476887db28c040d5e05 100755 (executable)
--- a/t/t5601-clone.sh
+++ b/t/t5601-clone.sh
@@ -487,7 +487,7 @@ test_clone_url () {
        expect_ssh "$@"
 }
 
-test_expect_success !MINGW 'clone c:temp is ssl' '
+test_expect_success !MINGW,!CYGWIN 'clone c:temp is ssl' '
        test_clone_url c:temp c temp
 '