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275721c267
Add a new function, get_tree_entry_follow_symlinks, to tree-walk.[ch]. The function is not yet used. It will be used to implement git cat-file --batch --follow-symlinks. The function locates an object by path, following symlinks in the repository. If the symlinks lead outside the repository, the function reports this to the caller. Signed-off-by: David Turner <dturner@twopensource.com> Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
#ifndef TREE_WALK_H
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#define TREE_WALK_H
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struct name_entry {
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const unsigned char *sha1;
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const char *path;
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unsigned int mode;
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};
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struct tree_desc {
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const void *buffer;
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struct name_entry entry;
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unsigned int size;
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};
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static inline const unsigned char *tree_entry_extract(struct tree_desc *desc, const char **pathp, unsigned int *modep)
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{
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*pathp = desc->entry.path;
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*modep = desc->entry.mode;
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return desc->entry.sha1;
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}
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static inline int tree_entry_len(const struct name_entry *ne)
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{
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return (const char *)ne->sha1 - ne->path - 1;
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}
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void update_tree_entry(struct tree_desc *);
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void init_tree_desc(struct tree_desc *desc, const void *buf, unsigned long size);
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/*
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* Helper function that does both tree_entry_extract() and update_tree_entry()
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* and returns true for success
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*/
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int tree_entry(struct tree_desc *, struct name_entry *);
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void *fill_tree_descriptor(struct tree_desc *desc, const unsigned char *sha1);
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struct traverse_info;
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typedef int (*traverse_callback_t)(int n, unsigned long mask, unsigned long dirmask, struct name_entry *entry, struct traverse_info *);
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int traverse_trees(int n, struct tree_desc *t, struct traverse_info *info);
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enum follow_symlinks_result {
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FOUND = 0, /* This includes out-of-tree links */
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MISSING_OBJECT = -1, /* The initial symlink is missing */
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DANGLING_SYMLINK = -2, /*
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* The initial symlink is there, but
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* (transitively) points to a missing
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* in-tree file
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*/
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SYMLINK_LOOP = -3,
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NOT_DIR = -4, /*
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* Somewhere along the symlink chain, a path is
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* requested which contains a file as a
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* non-final element.
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*/
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};
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enum follow_symlinks_result get_tree_entry_follow_symlinks(unsigned char *tree_sha1, const char *name, unsigned char *result, struct strbuf *result_path, unsigned *mode);
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struct traverse_info {
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struct traverse_info *prev;
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struct name_entry name;
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int pathlen;
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struct pathspec *pathspec;
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unsigned long df_conflicts;
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traverse_callback_t fn;
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void *data;
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int show_all_errors;
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};
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int get_tree_entry(const unsigned char *, const char *, unsigned char *, unsigned *);
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extern char *make_traverse_path(char *path, const struct traverse_info *info, const struct name_entry *n);
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extern void setup_traverse_info(struct traverse_info *info, const char *base);
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static inline int traverse_path_len(const struct traverse_info *info, const struct name_entry *n)
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{
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return info->pathlen + tree_entry_len(n);
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}
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/* in general, positive means "kind of interesting" */
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enum interesting {
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all_entries_not_interesting = -1, /* no, and no subsequent entries will be either */
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entry_not_interesting = 0,
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entry_interesting = 1,
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all_entries_interesting = 2 /* yes, and all subsequent entries will be */
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};
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extern enum interesting tree_entry_interesting(const struct name_entry *,
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struct strbuf *, int,
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const struct pathspec *ps);
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#endif
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