git-instaweb: fix lighttpd configuration on cygwin

diff --git a/exec_cmd.c b/exec_cmd.c
index da04efe951e5b8dc4e7b72246212d8ebabc09ec6..217c12577f52b8ff9d535a086ec75d54107ee01c 100644 (file)
--- a/exec_cmd.c
+++ b/exec_cmd.c
@@ -5,39 +5,57 @@
 
 extern char **environ;
 static const char *argv_exec_path;
+static const char *argv0_path;
 
-static const char *builtin_exec_path(void)
+const char *system_path(const char *path)
 {
-#ifndef __MINGW32__
-       return GIT_EXEC_PATH;
+#ifdef RUNTIME_PREFIX
+       static const char *prefix;
 #else
-       int len;
-       char *p, *q, *sl;
-       static char *ep;
-       if (ep)
-               return ep;
-
-       len = strlen(_pgmptr);
-       if (len < 2)
-               return ep = ".";
-
-       p = ep = xmalloc(len+1);
-       q = _pgmptr;
-       sl = NULL;
-       /* copy program name, turn '\\' into '/', skip last part */
-       while ((*p = *q)) {
-               if (*q == '\\' || *q == '/') {
-                       *p = '/';
-                       sl = p;
-               }
-               p++, q++;
+       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 &&
+           !(prefix = strip_path_suffix(argv0_path, GIT_EXEC_PATH)) &&
+           !(prefix = strip_path_suffix(argv0_path, BINDIR)) &&
+           !(prefix = strip_path_suffix(argv0_path, "git"))) {
+               prefix = PREFIX;
+               fprintf(stderr, "RUNTIME_PREFIX requested, "
+                               "but prefix computation failed.  "
+                               "Using static fallback '%s'.\n", prefix);
        }
-       if (sl)
-               *sl = '\0';
-       else
-               ep[0] = '.', ep[1] = '\0';
-       return ep;
 #endif
+
+       strbuf_addf(&d, "%s/%s", prefix, path);
+       path = strbuf_detach(&d, NULL);
+       return path;
+}
+
+const char *git_extract_argv0_path(const char *argv0)
+{
+       const char *slash;
+
+       if (!argv0 || !*argv0)
+               return NULL;
+       slash = argv0 + strlen(argv0);
+
+       while (argv0 <= slash && !is_dir_sep(*slash))
+               slash--;
+
+       if (slash >= argv0) {
+               argv0_path = xstrndup(argv0, slash - argv0);
+               return slash + 1;
+       }
+
+       return argv0;
 }
 
 void git_set_argv_exec_path(const char *exec_path)
@@ -59,7 +77,7 @@ const char *git_exec_path(void)
                return env;
        }
 
-       return builtin_exec_path();
+       return system_path(GIT_EXEC_PATH);
 }
 
 static void add_path(struct strbuf *out, const char *path)
@@ -68,23 +86,19 @@ static void add_path(struct strbuf *out, const char *path)
                if (is_absolute_path(path))
                        strbuf_addstr(out, path);
                else
-                       strbuf_addstr(out, make_absolute_path(path));
+                       strbuf_addstr(out, make_nonrelative_path(path));
 
                strbuf_addch(out, PATH_SEP);
        }
 }
 
-void setup_path(const char *cmd_path)
+void setup_path(void)
 {
        const char *old_path = getenv("PATH");
-       struct strbuf new_path;
+       struct strbuf new_path = STRBUF_INIT;
 
-       strbuf_init(&new_path, 0);
-
-       add_path(&new_path, argv_exec_path);
-       add_path(&new_path, getenv(EXEC_PATH_ENVIRONMENT));
-       add_path(&new_path, builtin_exec_path());
-       add_path(&new_path, cmd_path);
+       add_path(&new_path, git_exec_path());
+       add_path(&new_path, argv0_path);
 
        if (old_path)
                strbuf_addstr(&new_path, old_path);
@@ -96,7 +110,7 @@ void setup_path(const char *cmd_path)
        strbuf_release(&new_path);
 }
 
-int execv_git_cmd(const char **argv)
+const char **prepare_git_cmd(const char **argv)
 {
        int argc;
        const char **nargv;
@@ -109,6 +123,11 @@ int execv_git_cmd(const char **argv)
        for (argc = 0; argv[argc]; argc++)
                nargv[argc + 1] = argv[argc];
        nargv[argc + 1] = NULL;
+       return nargv;
+}
+
+int execv_git_cmd(const char **argv) {
+       const char **nargv = prepare_git_cmd(argv);
        trace_argv_printf(nargv, "trace: exec:");
 
        /* execvp() can only ever return if it fails */