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archive: reorder option parsing and config reading

The archive command does three things during its
initialization phase:

  1. parse command-line options

  2. setup the git directory

  3. read config

During phase (1), if we see any options that do not require
a git directory (like "--list"), we handle them immediately
and exit, making it safe to abort step (2) if we are not in
a git directory.

Step (3) must come after step (2), since the git directory
may influence configuration.  However, this leaves no
possibility of configuration from step (3) impacting the
command-line options in step (1) (which is useful, for
example, for supporting user-configurable output formats).

Instead, let's reorder this to:

  1. setup the git directory, if it exists

  2. read config

  3. parse command-line options

  4. if we are not in a git repository, die

This should have the same external behavior, but puts
configuration before command-line parsing.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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1 parent 2c162b5 commit 2321286298bf956a3fa8e91dd361b8cf4e81e6a0 @peff peff committed with gitster Jun 15, 2011
Showing with 14 additions and 4 deletions.
  1. +14 −4 archive.c
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18 archive.c
@@ -387,17 +387,27 @@ static int parse_archive_args(int argc, const char **argv,
int write_archive(int argc, const char **argv, const char *prefix,
int setup_prefix)
{
+ int nongit = 0;
const struct archiver *ar = NULL;
struct archiver_args args;
- argc = parse_archive_args(argc, argv, &ar, &args);
if (setup_prefix && prefix == NULL)
- prefix = setup_git_directory();
+ prefix = setup_git_directory_gently(&nongit);
+
+ git_config(git_default_config, NULL);
+
+ argc = parse_archive_args(argc, argv, &ar, &args);
+ if (nongit) {
+ /*
+ * We know this will die() with an error, so we could just
+ * die ourselves; but its error message will be more specific
+ * than what we could write here.
+ */
+ setup_git_directory();
+ }
parse_treeish_arg(argv, &args, prefix);
parse_pathspec_arg(argv + 1, &args);
- git_config(git_default_config, NULL);
-
return ar->write_archive(&args);
}

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