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Re: [PATCH v2 7/8] alias_lookup(): optionally return top-level directory

From
Jeff King <peff@peff.net>
Date
Jun 10, 2017, 10:18 UTC
Message-ID
<20170610101813.n26wmxcueicecptz@sigill.intra.peff.net>
In-Reply-To
<aa6601bbfa50c728b7820e0a2991da76288509a5.1496951503.git.johannes.schindelin@gmx.de>
On Thu, Jun 08, 2017 at 09:53:50PM +0200, Johannes Schindelin wrote:
Show 25 quoted lines
> -char *alias_lookup(const char *alias)
> [...]
>  {
> -	char *v = NULL;
> -	struct strbuf key = STRBUF_INIT;
> -	strbuf_addf(&key, "alias.%s", alias);
> -	if (git_config_key_is_valid(key.buf))
> -		git_config_get_string(key.buf, &v);
> -	strbuf_release(&key);
> -	return v;
> +	struct strbuf key;
> +	char *v;
> +};
> [...]
> +char *alias_lookup(const char *alias, struct strbuf *cdup_dir)
> +{
> +	struct config_alias_data data = { STRBUF_INIT, NULL };
> +
> +	strbuf_addf(&data.key, "alias.%s", alias);
> +	if (git_config_key_is_valid(data.key.buf))
> +		read_early_config(config_alias_cb, &data, cdup_dir);
> +	strbuf_release(&data.key);
> +
> +	return data.v;
>  }
Two optional cleanups here:
  1. We don't need to call config_key_is_valid when using a callback. We
     only needed that to prevent the configset machinery from issuing a
     warning. It does save us reading the config entirely when the
     program name is syntactically invalid as an alias, but that's a
     pretty rare case.
  2. Now that we're not using the configset machinery, we don't need to
     have the alias name as a full string. Instead of using the strbuf,
     we could just pass the "alias" string itself and do:
       if (skip_prefix(var, "alias.", &key) && !strcmp(key, data->key))
     in the callback.
I don't think either is a big deal, though.
-Peff
Previous: Johannes SchindelinNext: Johannes Schindelin
Message 24 of 32 in “Avoid problem where git_dir is set after alias expansion”
  1. 0/8 Avoid problem where git_dir is set after alias expansionJohannes Schindelin, Jun 8, 2017
  2. 2/8 config: report correct line number upon errorJohannes Schindelin, Jun 8, 2017
  3. Jeff KingJun 10, 2017
  4. Johannes SchindelinJun 13, 2017
  5. Jeff KingJun 13, 2017
  6. 4/8 read_early_config(): optionally return the worktree's top-level directoryJohannes Schindelin, Jun 8, 2017
  7. Jeff KingJun 10, 2017
  8. 1/8 discover_git_directory(): avoid setting invalid git_dirJohannes Schindelin, Jun 8, 2017
  9. Jeff KingJun 10, 2017
  10. 3/8 help: use early config when autocorrecting aliasesJohannes Schindelin, Jun 8, 2017
  11. Jeff KingJun 10, 2017
  12. 5/8 t1308: relax the test verifying that empty alias values are disallowedJohannes Schindelin, Jun 8, 2017
  13. Junio C HamanoJun 10, 2017
  14. Johannes SchindelinJun 13, 2017
  15. Junio C HamanoJun 13, 2017
  16. 6/8 t7006: demonstrate a problem with aliases in subdirectoriesJohannes Schindelin, Jun 8, 2017
  17. 8/8 Use the early config machinery to expand aliasesJohannes Schindelin, Jun 8, 2017
  18. Jeff KingJun 10, 2017
  19. Jeff KingJun 10, 2017
  20. Junio C HamanoJun 12, 2017
  21. Johannes SchindelinJun 13, 2017
  22. Jeff KingJun 13, 2017
  23. 7/8 alias_lookup(): optionally return top-level directoryJohannes Schindelin, Jun 8, 2017
  24. Jeff KingJun 10, 2017
  25. Johannes SchindelinJun 13, 2017
  26. Jeff KingJun 13, 2017
  27. Johannes SchindelinJun 13, 2017
  28. Jeff KingJun 13, 2017
  29. Junio C HamanoJun 13, 2017
  30. Jeff KingJun 14, 2017
  31. Johannes SchindelinJun 14, 2017
  32. Brandon WilliamsJun 8, 2017

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