Yes, git still shows the message a currently invalid alternate (one of two 
records), but it's able to work further (reset --hard, etc).

But I can agree that this way could be unacceptable due this error message.

четверг, 12 августа 2021 г. в 12:00:58 UTC+3, Jan Kiszka: 

> On 12.08.21 10:10, Uladzimir Bely wrote:
> > Task adjust_git modifies git alternates by replacing DL_DIR to 
> /downloads.
> > New path is used inside buildchroot, so that working git repo
> > becomes broken outside buildchroot.
> > 
> > This causes problems with rebuilding such packages as cowsay if something
> > has changed in bitbake environment since previous build:
> > 
> > ERROR:
> > mc:qemuarm64-buster:cowsay-git-r0 do_patch: Command Error: 'sh -c 'git
> > --work-tree=/path/build/tmp/work/debian-buster-arm64/cowsay/git-r0/git
> > reset --hard HEAD'' exited with 0
> > 
> > The solution is to add new path to git alternates so that original path
> > will work outside buildchroot, and new one will work in buildchroot.
> > 
> > Signed-off-by: Uladzimir Bely <ub...@ilbers.de>
> > ---
> > meta/classes/dpkg-base.bbclass | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/meta/classes/dpkg-base.bbclass 
> b/meta/classes/dpkg-base.bbclass
> > index ec8fbc1..4b9b782 100644
> > --- a/meta/classes/dpkg-base.bbclass
> > +++ b/meta/classes/dpkg-base.bbclass
> > @@ -46,7 +46,7 @@ python do_adjust_git() {
> > 
> > if os.path.exists(alternates):
> > cmd = ["sed", "-i", alternates, "-e",
> > - "s|{}|/downloads|".format(d.getVar("DL_DIR"))]
> > + "s|\({}\(.*\)\)|\\1\\n/downloads\\2|".format(d.getVar("DL_DIR"))]
> > bb.note(' '.join(cmd))
> > if subprocess.call(cmd) != 0:
> > bb.fatal("git alternates adjustment failed")
> > 
>
> This doesn'tt work, already tried: git fails if just one record is not
> working.
>
> Jan
>
> -- 
> Siemens AG, T RDA IOT
> Corporate Competence Center Embedded Linux
>