From 9eec4795d44439cd170fb52c73827c728252648d Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Mon, 9 Apr 2007 21:14:58 -0700 Subject: [PATCH] Add "S_IFDIRLNK" file mode infrastructure for git links This just adds the basic helper functions to recognize and work with git tree entries that are links to other git repositories ("subprojects"). They still aren't actually connected up to any of the code-paths, but now all the infrastructure is in place. The next commit will start actually adding actual subproject support. Signed-off-by: Linus Torvalds Signed-off-by: Junio C Hamano --- cache.h | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/cache.h b/cache.h index eb57507b8..1b3d00ee1 100644 --- a/cache.h +++ b/cache.h @@ -24,6 +24,22 @@ #define DTYPE(de) DT_UNKNOWN #endif +/* + * A "directory link" is a link to another git directory. + * + * The value 0160000 is not normally a valid mode, and + * also just happens to be S_IFDIR + S_IFLNK + * + * NOTE! We *really* shouldn't depend on the S_IFxxx macros + * always having the same values everywhere. We should use + * our internal git values for these things, and then we can + * translate that to the OS-specific value. It just so + * happens that everybody shares the same bit representation + * in the UNIX world (and apparently wider too..) + */ +#define S_IFDIRLNK 0160000 +#define S_ISDIRLNK(m) (((m) & S_IFMT) == S_IFDIRLNK) + /* * Intensive research over the course of many years has shown that * port 9418 is totally unused by anything else. Or @@ -104,6 +120,8 @@ static inline unsigned int create_ce_mode(unsigned int mode) { if (S_ISLNK(mode)) return htonl(S_IFLNK); + if (S_ISDIR(mode) || S_ISDIRLNK(mode)) + return htonl(S_IFDIRLNK); return htonl(S_IFREG | ce_permissions(mode)); } static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned int mode) @@ -121,7 +139,7 @@ static inline unsigned int ce_mode_from_stat(struct cache_entry *ce, unsigned in } #define canon_mode(mode) \ (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \ - S_ISLNK(mode) ? S_IFLNK : S_IFDIR) + S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFDIRLNK) #define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7) -- 2.26.2