describe: when failing, tell the user about options that work

diff --git a/setup.c b/setup.c
index 4d27f28c8fdc259a7ff308865690d0dfd88279a6..029371e5844a1069d62456c6bb51028efbb671c4 100644 (file)
--- a/setup.c
+++ b/setup.c
@@ -41,7 +41,7 @@ const char *prefix_path(const char *prefix, int len, const char *path)
 const char *prefix_filename(const char *pfx, int pfx_len, const char *arg)
 {
        static char path[PATH_MAX];
-#ifndef __MINGW32__
+#ifndef WIN32
        if (!pfx || !*pfx || is_absolute_path(arg))
                return arg;
        memcpy(path, pfx, pfx_len);
@@ -327,7 +327,7 @@ const char *setup_git_directory_gently(int *nongit_ok)
                                return NULL;
                        set_git_dir(make_absolute_path(gitdirenv));
                        if (chdir(work_tree_env) < 0)
-                               die ("Could not chdir to %s", work_tree_env);
+                               die_errno ("Could not chdir to '%s'", work_tree_env);
                        strcat(buffer, "/");
                        return retval;
                }
@@ -339,7 +339,7 @@ const char *setup_git_directory_gently(int *nongit_ok)
        }
 
        if (!getcwd(cwd, sizeof(cwd)-1))
-               die("Unable to read current working directory");
+               die_errno("Unable to read current working directory");
 
        ceil_offset = longest_ancestor_length(cwd, env_ceiling_dirs);
        if (ceil_offset < 0 && has_dos_drive_prefix(cwd))
@@ -382,7 +382,7 @@ const char *setup_git_directory_gently(int *nongit_ok)
                if (offset <= ceil_offset) {
                        if (nongit_ok) {
                                if (chdir(cwd))
-                                       die("Cannot come back to cwd");
+                                       die_errno("Cannot come back to cwd");
                                *nongit_ok = 1;
                                return NULL;
                        }
@@ -493,10 +493,10 @@ const char *setup_git_directory(void)
                static char buffer[PATH_MAX + 1];
                char *rel;
                if (retval && chdir(retval))
-                       die ("Could not jump back into original cwd");
+                       die_errno ("Could not jump back into original cwd");
                rel = get_relative_cwd(buffer, PATH_MAX, get_git_work_tree());
                if (rel && *rel && chdir(get_git_work_tree()))
-                       die ("Could not jump to working directory");
+                       die_errno ("Could not jump to working directory");
                return rel && *rel ? strcat(rel, "/") : NULL;
        }