Subject: Re: [MinGW port] Unable to repack on Clearcase dynamic views

From: Johannes Sixt <[email-masked]>
Date: Wed, 30 May 2007 17:28:44 +0200

Nguyen Thai Ngoc Duy wrote:
> On clearcase dynamic views (kind of virtual drives), "mv -f a b" won't
> work if "a" is read-only. Because git-repack.sh removes all write
> permission before moving packs, it fails on clearcase dynamic views.
> 
> My approach is rather ugly. Does anyone have a better solution?

If you do two 'git repack -a -d' in a row, the second one fails even
with this patch, right? To fix it, you must 'chmod u+w' in the for-loop
right above this hunk, too.

Since you 'chmod a-w' after the mv, why not just remove the first ones
before the first mv? Then you can get rid of the second try.

-- Hannes

> 
> diff --git a/git-repack.sh b/git-repack.sh
> index acb78ba..76a9525 100755
> --- a/git-repack.sh
> +++ b/git-repack.sh
> @@ -86,10 +86,22 @@ else
>         mv -f "$PACKTMP-$name.idx"  "$PACKDIR/pack-$name.idx" &&
>         test -f "$PACKDIR/pack-$name.pack" &&
>         test -f "$PACKDIR/pack-$name.idx" || {
> -               echo >&2 "Couldn't replace the existing pack with updated one."
> -               echo >&2 "The original set of packs have been saved as"
> -               echo >&2 "old-pack-$name.{pack,idx} in $PACKDIR."
> -               exit 1
> +               # Clearcase dynamic views do not allow to move file without write permission
> +               # Try the second time with write allowed
> +               chmod u+w "$PACKTMP-$name.pack"
> +               chmod u+w "$PACKTMP-$name.idx"
> +
> +               mv -f "$PACKTMP-$name.pack" "$PACKDIR/pack-$name.pack" &&
> +               mv -f "$PACKTMP-$name.idx"  "$PACKDIR/pack-$name.idx" &&
> +               test -f "$PACKDIR/pack-$name.pack" &&
> +               test -f "$PACKDIR/pack-$name.idx" || {
> +                       echo >&2 "Couldn't replace the existing pack with updated one."
> +                       echo >&2 "The original set of packs have been saved as"
> +                       echo >&2 "old-pack-$name.{pack,idx} in $PACKDIR."
> +                       exit 1
> +               }
> +               chmod a-w "$PACKDIR/pack-$name.pack"
> +               chmod a-w "$PACKDIR/pack-$name.idx"
>         }
>         rm -f "$PACKDIR/old-pack-$name.pack" "$PACKDIR/old-pack-$name.idx"
>  fi
> 
> --
> Duy