core.warnambiguousrefs: warns when "name" is used and both "name" branch and tag...

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/cache.h b/cache.h
index 1f96280..255e6b5 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -165,6 +165,7 @@ extern void rollback_index_file(struct cache_file *);
 extern int trust_executable_bit;
 extern int assume_unchanged;
 extern int only_use_symrefs;
+extern int warn_ambiguous_refs;
 extern int diff_rename_limit_default;
 extern int shared_repository;
 extern const char *apply_default_whitespace;

diff --git a/config.c b/config.c
index 7dbdce1..95ec349 100644 (file)
--- a/config.c
+++ b/config.c
@@ -232,6 +232,11 @@ int git_default_config(const char *var, const char *value)
                return 0;
        }
 
+       if (!strcmp(var, "core.warnambiguousrefs")) {
+               warn_ambiguous_refs = git_config_bool(var, value);
+               return 0;
+       }
+
        if (!strcmp(var, "user.name")) {
                strncpy(git_default_name, value, sizeof(git_default_name));
                return 0;

diff --git a/environment.c b/environment.c
index 16c08f0..5d29b92 100644 (file)
--- a/environment.c
+++ b/environment.c
@@ -14,6 +14,7 @@ char git_default_name[MAX_GITNAME];
 int trust_executable_bit = 1;
 int assume_unchanged = 0;
 int only_use_symrefs = 0;
+int warn_ambiguous_refs = 0;
 int repository_format_version = 0;
 char git_commit_encoding[MAX_ENCODING_LENGTH] = "utf-8";
 int shared_repository = 0;

diff --git a/sha1_name.c b/sha1_name.c
index d67de18..74c479c 100644 (file)
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -240,9 +240,13 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
                "refs",
                "refs/tags",
                "refs/heads",
+               "refs/remotes",
                NULL
        };
        const char **p;
+       const char *warning = "warning: refname '%.*s' is ambiguous.\n";
+       char *pathname;
+       int already_found = 0;
 
        if (len == 40 && !get_sha1_hex(str, sha1))
                return 0;
@@ -252,10 +256,23 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
                return -1;
 
        for (p = prefix; *p; p++) {
-               char *pathname = git_path("%s/%.*s", *p, len, str);
-               if (!read_ref(pathname, sha1))
-                       return 0;
+               unsigned char sha1_from_ref[20];
+               unsigned char *this_result =
+                       already_found ? sha1_from_ref : sha1;
+               pathname = git_path("%s/%.*s", *p, len, str);
+               if (!read_ref(pathname, this_result)) {
+                       if (warn_ambiguous_refs) {
+                               if (already_found &&
+                                   !memcmp(sha1, sha1_from_ref, 20))
+                                       fprintf(stderr, warning, len, str);
+                               already_found++;
+                       }
+                       else
+                               return 0;
+               }
        }
+       if (already_found)
+               return 0;
        return -1;
 }