X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=exec_cmd.c;h=f234066defd637dc3c048ba3d9eb43f1ecbad446;hb=ab69e3e43a12cf02505f3e9e561c49c1fe8a81a6;hp=f8f416b6460d7d2d4f5415258dadc7367412ba5a;hpb=2cd72b0b290e40fb4d6a925ce26603503f01aa09;p=git.git

diff --git a/exec_cmd.c b/exec_cmd.c
index f8f416b64..f234066de 100644
--- a/exec_cmd.c
+++ b/exec_cmd.c
@@ -9,12 +9,56 @@ static const char *argv0_path;
 
 const char *system_path(const char *path)
 {
+#ifdef RUNTIME_PREFIX
+	static const char *prefix;
+#else
 	static const char *prefix = PREFIX;
+#endif
 	struct strbuf d = STRBUF_INIT;
 
 	if (is_absolute_path(path))
 		return path;
 
+#ifdef RUNTIME_PREFIX
+	assert(argv0_path);
+	assert(is_absolute_path(argv0_path));
+
+	if (!prefix) {
+		const char *strip[] = {
+			GIT_EXEC_PATH,
+			BINDIR,
+			0
+		};
+		const char **s;
+
+		for (s = strip; *s; s++) {
+			const char *sargv = argv0_path + strlen(argv0_path);
+			const char *ss = *s + strlen(*s);
+			while (argv0_path < sargv && *s < ss
+				&& (*sargv == *ss ||
+				    (is_dir_sep(*sargv) && is_dir_sep(*ss)))) {
+				sargv--;
+				ss--;
+			}
+			if (*s == ss) {
+				struct strbuf d = STRBUF_INIT;
+				/* We also skip the trailing directory separator. */
+				assert(sargv - argv0_path - 1 >= 0);
+				strbuf_add(&d, argv0_path, sargv - argv0_path - 1);
+				prefix = strbuf_detach(&d, NULL);
+				break;
+			}
+		}
+	}
+
+	if (!prefix) {
+		prefix = PREFIX;
+		fprintf(stderr, "RUNTIME_PREFIX requested, "
+				"but prefix computation failed.  "
+				"Using static fallback '%s'.\n", prefix);
+	}
+#endif
+
 	strbuf_addf(&d, "%s/%s", prefix, path);
 	path = strbuf_detach(&d, NULL);
 	return path;
@@ -78,9 +122,7 @@ void setup_path(void)
 	const char *old_path = getenv("PATH");
 	struct strbuf new_path = STRBUF_INIT;
 
-	add_path(&new_path, argv_exec_path);
-	add_path(&new_path, getenv(EXEC_PATH_ENVIRONMENT));
-	add_path(&new_path, system_path(GIT_EXEC_PATH));
+	add_path(&new_path, git_exec_path());
 	add_path(&new_path, argv0_path);
 
 	if (old_path)