git p4 test: avoid loop in client_view

diff --git a/setup.c b/setup.c
index b4cd35645618558a43b497294536b6947f7b190f..1ccfafaa7a85875338a49953518207b74dca62c4 100644 (file)
--- a/setup.c
+++ b/setup.c
@@ -246,6 +246,25 @@ static const char *prefix_pathspec(const char *prefix, int prefixlen, const char
                return prefix_path(prefix, prefixlen, copyfrom);
 }
 
+/*
+ * N.B. get_pathspec() is deprecated in favor of the "struct pathspec"
+ * based interface - see pathspec_magic above.
+ *
+ * Arguments:
+ *  - prefix - a path relative to the root of the working tree
+ *  - pathspec - a list of paths underneath the prefix path
+ *
+ * Iterates over pathspec, prepending each path with prefix,
+ * and return the resulting list.
+ *
+ * If pathspec is empty, return a singleton list containing prefix.
+ *
+ * If pathspec and prefix are both empty, return an empty list.
+ *
+ * This is typically used by built-in commands such as add.c, in order
+ * to normalize argv arguments provided to the built-in into a list of
+ * paths to process, all relative to the root of the working tree.
+ */
 const char **get_pathspec(const char *prefix, const char **pathspec)
 {
        const char *entry = *pathspec;
@@ -621,6 +640,27 @@ static dev_t get_device_or_die(const char *path, const char *prefix, int prefix_
        return buf.st_dev;
 }
 
+/*
+ * A "string_list_each_func_t" function that canonicalizes an entry
+ * from GIT_CEILING_DIRECTORIES using real_path_if_valid(), or
+ * discards it if unusable.
+ */
+static int canonicalize_ceiling_entry(struct string_list_item *item,
+                                     void *unused)
+{
+       char *ceil = item->string;
+       const char *real_path;
+
+       if (!*ceil || !is_absolute_path(ceil))
+               return 0;
+       real_path = real_path_if_valid(ceil);
+       if (!real_path)
+               return 0;
+       free(item->string);
+       item->string = xstrdup(real_path);
+       return 1;
+}
+
 /*
  * We cannot decide in this function whether we are in the work tree or
  * not, since the config can only be read _after_ this function was called.
@@ -659,6 +699,8 @@ static const char *setup_git_directory_gently_1(int *nongit_ok)
 
        if (env_ceiling_dirs) {
                string_list_split(&ceiling_dirs, env_ceiling_dirs, PATH_SEP, -1);
+               filter_string_list(&ceiling_dirs, 0,
+                                  canonicalize_ceiling_entry, NULL);
                ceil_offset = longest_ancestor_length(cwd, &ceiling_dirs);
                string_list_clear(&ceiling_dirs, 0);
        }