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Re: [PATCH] git-completion.bash: always swallow error output of for-each-ref

From
Junio C Hamano <gitster@pobox.com>
Date
Feb 12, 2016, 20:00 UTC
Message-ID
<xmqqsi0xu2ac.fsf@gitster.mtv.corp.google.com>
In-Reply-To
<20160204111307.GA30495@sigill.intra.peff.net>
Jeff King <peff@peff.net> writes:
Show 15 quoted lines
> On Thu, Feb 04, 2016 at 11:34:59AM +0100, Sebastian Schuberth wrote:
>
>> This avoids output like
>> 
>>     warning: ignoring broken ref refs/remotes/origin/HEAD
>> 
>> while completing branch names.
>
> Hmm. I feel like this case (HEAD points to a branch, then `fetch
> --prune` deletes it) came up recently and we discussed quieting that
> warning. But now I cannot seem to find it.
>
> Anyway, I this is a reasonable workaround. Errors from bash completion
> scripts are almost always going to be useless and get in the way of
> reading your own prompt.

I think that is absolutely the right stance to take, but then I wonder if it is a sensible execution to sprinkle 2>/dev/null everywhere.

For example, couldn't we do something like this instead?

This is just for illustration and does not remove all 2>/dev/null and replace them with a single redirection that covers the entire shell function body, but something along this line smells a lot more pleasant. I dunno.

 contrib/completion/git-completion.bash | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index ba4137d..637c42d 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -47,14 +47,14 @@ __gitdir ()
 		elif [ -d .git ]; then
 			echo .git
 		else
-			git rev-parse --git-dir 2>/dev/null
+			git rev-parse --git-dir
 		fi
 	elif [ -d "$1/.git" ]; then
 		echo "$1/.git"
 	else
 		echo "$1"
 	fi
-}
+} 2>/dev/null
 
 # The following function is based on code from:
 #
@@ -320,7 +320,7 @@ __git_heads ()
 			refs/heads
 		return
 	fi
-}
+} 2>/dev/null
 
 __git_tags ()
 {
@@ -330,7 +330,7 @@ __git_tags ()
 			refs/tags
 		return
 	fi
-}
+} 2>/dev/null
 
 # __git_refs accepts 0, 1 (to pass to __gitdir), or 2 arguments
 # presence of 2nd argument means use the guess heuristic employed
@@ -389,7 +389,7 @@ __git_refs ()
 			"refs/remotes/$dir/" 2>/dev/null | sed -e "s#^$dir/##"
 		;;
 	esac
-}
+} 2>/dev/null
 
 # __git_refs2 requires 1 argument (to pass to __git_refs)
 __git_refs2 ()
Previous: Duy NguyenNext: Jeff King
Message 16 of 24 in “git-completion.bash: always swallow error output of for-each-ref”
  1. git-completion.bash: always swallow error output of for-each-refSebastian Schuberth, Feb 4, 2016
  2. Jeff KingFeb 4, 2016
  3. Johannes SchindelinFeb 4, 2016
  4. Jeff KingFeb 4, 2016
  5. Junio C HamanoFeb 4, 2016
  6. SZEDER GáborFeb 12, 2016
  7. Jeff KingFeb 12, 2016
  8. SZEDER GáborFeb 13, 2016
  9. Johannes SchindelinFeb 13, 2016
  10. SZEDER GáborFeb 13, 2016
  11. Johannes SchindelinFeb 13, 2016
  12. Jeff KingFeb 13, 2016
  13. SZEDER GáborFeb 12, 2016
  14. Jeff KingFeb 12, 2016
  15. Duy NguyenFeb 13, 2016
  16. Junio C HamanoFeb 12, 2016
  17. Jeff KingFeb 12, 2016
  18. Junio C HamanoFeb 12, 2016
  19. SZEDER GáborFeb 12, 2016
  20. Jeff KingFeb 12, 2016
  21. Junio C HamanoFeb 12, 2016
  22. Junio C HamanoFeb 23, 2016
  23. Sebastian SchuberthFeb 24, 2016
  24. Sebastian SchuberthFeb 12, 2016

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