checkout: fix bug with ambiguous refs

diff --git a/config.c b/config.c
index cdcf5836c6c374eb59e80f89dbcf525fd6bf780f..9918b9351d8b8b9b33fea479bd4f4997a5d6528a 100644 (file)
--- a/config.c
+++ b/config.c
@@ -8,6 +8,7 @@
 #include "cache.h"
 #include "exec_cmd.h"
 #include "strbuf.h"
+#include "quote.h"
 
 #define MAXNAME (256)
 
@@ -34,6 +35,19 @@ static void lowercase(char *p)
                *p = tolower(*p);
 }
 
+void git_config_push_parameter(const char *text)
+{
+       struct strbuf env = STRBUF_INIT;
+       const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
+       if (old) {
+               strbuf_addstr(&env, old);
+               strbuf_addch(&env, ' ');
+       }
+       sq_quote_buf(&env, text);
+       setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
+       strbuf_release(&env);
+}
+
 int git_config_parse_parameter(const char *text)
 {
        struct config_item *ct;
@@ -61,6 +75,37 @@ int git_config_parse_parameter(const char *text)
        return 0;
 }
 
+int git_config_parse_environment(void) {
+       const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
+       char *envw;
+       const char **argv = NULL;
+       int nr = 0, alloc = 0;
+       int i;
+
+       if (!env)
+               return 0;
+       /* sq_dequote will write over it */
+       envw = xstrdup(env);
+
+       if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
+               free(envw);
+               return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
+       }
+
+       for (i = 0; i < nr; i++) {
+               if (git_config_parse_parameter(argv[i]) < 0) {
+                       error("bogus config parameter: %s", argv[i]);
+                       free(argv);
+                       free(envw);
+                       return -1;
+               }
+       }
+
+       free(argv);
+       free(envw);
+       return 0;
+}
+
 static int get_next_char(void)
 {
        int c;
@@ -365,7 +410,7 @@ unsigned long git_config_ulong(const char *name, const char *value)
        return ret;
 }
 
-int git_config_maybe_bool(const char *name, const char *value)
+static int git_config_maybe_bool_text(const char *name, const char *value)
 {
        if (!value)
                return 1;
@@ -382,9 +427,21 @@ int git_config_maybe_bool(const char *name, const char *value)
        return -1;
 }
 
+int git_config_maybe_bool(const char *name, const char *value)
+{
+       int v = git_config_maybe_bool_text(name, value);
+       if (0 <= v)
+               return v;
+       if (!strcmp(value, "0"))
+               return 0;
+       if (!strcmp(value, "1"))
+               return 1;
+       return -1;
+}
+
 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
 {
-       int v = git_config_maybe_bool(name, value);
+       int v = git_config_maybe_bool_text(name, value);
        if (0 <= v) {
                *is_bool = 1;
                return v;
@@ -560,6 +617,9 @@ static int git_default_core_config(const char *var, const char *value)
        if (!strcmp(var, "core.editor"))
                return git_config_string(&editor_program, var, value);
 
+       if (!strcmp(var, "core.askpass"))
+               return git_config_string(&askpass_program, var, value);
+
        if (!strcmp(var, "core.excludesfile"))
                return git_config_pathname(&excludes_file, var, value);
 
@@ -773,7 +833,14 @@ int git_config_global(void)
 
 int git_config_from_parameters(config_fn_t fn, void *data)
 {
+       static int loaded_environment;
        const struct config_item *ct;
+
+       if (!loaded_environment) {
+               if (git_config_parse_environment() < 0)
+                       return -1;
+               loaded_environment = 1;
+       }
        for (ct = config_parameters; ct; ct = ct->next)
                if (fn(ct->name, ct->value, data) < 0)
                        return -1;
@@ -812,10 +879,9 @@ int git_config(config_fn_t fn, void *data)
        }
        free(repo_config);
 
-       if (config_parameters) {
-               ret += git_config_from_parameters(fn, data);
+       ret += git_config_from_parameters(fn, data);
+       if (config_parameters)
                found += 1;
-       }
 
        if (found == 0)
                return -1;