Merge branch 'jk/maint-add-empty'

* jk/maint-add-empty:
add: don't complain when adding empty project root

diff --combined builtin-add.c
index 314380eed054d97658d2f3256c62cd5e6880cbb0,ad889aac5bd174bf96a87b78eeb243aea89a1626..bee45f00de7d82e07b617716033f0d5605b2a368
--- 1/builtin-add.c
--- 2/builtin-add.c
+++ b/builtin-add.c
@@@ -10,14 -10,12 +10,14 @@@
  #include "cache-tree.h"
  #include "run-command.h"
  #include "parse-options.h"
 +#include "diff.h"
 +#include "revision.h"
  
  static const char * const builtin_add_usage[] = {
        "git add [options] [--] <filepattern>...",
        NULL
  };
 -static int patch_interactive, add_interactive;
 +static int patch_interactive, add_interactive, edit_interactive;
  static int take_worktree_changes;
  
  static void fill_pathspec_matches(const char **pathspec, char *seen, int specs)
@@@ -63,7 -61,7 +63,7 @@@ static void prune_directory(struct dir_
        fill_pathspec_matches(pathspec, seen, specs);
  
        for (i = 0; i < specs; i++) {
-               if (!seen[i] && !file_exists(pathspec[i]))
+               if (!seen[i] && pathspec[i][0] && !file_exists(pathspec[i]))
                        die("pathspec '%s' did not match any files",
                                        pathspec[i]);
        }
@@@ -189,51 -187,6 +189,51 @@@ int interactive_add(int argc, const cha
        return status;
  }
  
 +int edit_patch(int argc, const char **argv, const char *prefix)
 +{
 +      char *file = xstrdup(git_path("ADD_EDIT.patch"));
 +      const char *apply_argv[] = { "apply", "--recount", "--cached",
 +              file, NULL };
 +      struct child_process child;
 +      struct rev_info rev;
 +      int out;
 +      struct stat st;
 +
 +      git_config(git_diff_basic_config, NULL); /* no "diff" UI options */
 +
 +      if (read_cache() < 0)
 +              die ("Could not read the index");
 +
 +      init_revisions(&rev, prefix);
 +      rev.diffopt.context = 7;
 +
 +      argc = setup_revisions(argc, argv, &rev, NULL);
 +      rev.diffopt.output_format = DIFF_FORMAT_PATCH;
 +      out = open(file, O_CREAT | O_WRONLY, 0644);
 +      if (out < 0)
 +              die ("Could not open '%s' for writing.", file);
 +      rev.diffopt.file = fdopen(out, "w");
 +      rev.diffopt.close_file = 1;
 +      if (run_diff_files(&rev, 0))
 +              die ("Could not write patch");
 +
 +      launch_editor(file, NULL, NULL);
 +
 +      if (stat(file, &st))
 +              die("Could not stat '%s'", file);
 +      if (!st.st_size)
 +              die("Empty patch. Aborted.");
 +
 +      memset(&child, 0, sizeof(child));
 +      child.git_cmd = 1;
 +      child.argv = apply_argv;
 +      if (run_command(&child))
 +              die ("Could not apply '%s'", file);
 +
 +      unlink(file);
 +      return 0;
 +}
 +
  static struct lock_file lock_file;
  
  static const char ignore_error[] =
@@@ -248,7 -201,6 +248,7 @@@ static struct option builtin_add_option
        OPT_GROUP(""),
        OPT_BOOLEAN('i', "interactive", &add_interactive, "interactive picking"),
        OPT_BOOLEAN('p', "patch", &patch_interactive, "interactive patching"),
 +      OPT_BOOLEAN('e', "edit", &edit_interactive, "edit current diff and apply"),
        OPT_BOOLEAN('f', "force", &ignored_too, "allow adding otherwise ignored files"),
        OPT_BOOLEAN('u', "update", &take_worktree_changes, "update tracked files"),
        OPT_BOOLEAN('N', "intent-to-add", &intent_to_add, "record only the fact that the path will be added later"),
@@@ -299,19 -251,14 +299,19 @@@ int cmd_add(int argc, const char **argv
        int require_pathspec;
  
        argc = parse_options(argc, argv, builtin_add_options,
 -                        builtin_add_usage, 0);
 +                        builtin_add_usage, PARSE_OPT_KEEP_ARGV0);
        if (patch_interactive)
                add_interactive = 1;
        if (add_interactive)
 -              exit(interactive_add(argc, argv, prefix));
 +              exit(interactive_add(argc - 1, argv + 1, prefix));
  
        git_config(add_config, NULL);
  
 +      if (edit_interactive)
 +              return(edit_patch(argc, argv, prefix));
 +      argc--;
 +      argv++;
 +
        if (addremove && take_worktree_changes)
                die("-A and -u are mutually incompatible");
        if ((addremove || take_worktree_changes) && !argc) {