Re: dchroot with sid


Roger Leigh wrote:
Willie Wonka <floydstestemail@xxxxxxxxx> writes:

Hi, I'm the schroot/dchroot maintainer. I missed the initial
question, but I'd just like to note that

Hello! and Thank you for your awesome work and support ;-)

- the dchroot behaviour had an unintentional backward-incompatible
change in the options parsing and command execution. This has since
been corrected; it's currently waiting in NEW and should enter sid
in a week or so. In the meantime, it's available from

https://alioth.debian.org/project/shownotes.php?release_id=816
https://alioth.debian.org/download.php/1654/schroot-0.99.1.tar.bz2

- schroot allows any number of command-line options, e.g.

$ schroot -c chroot -- foo --opt1 --opt2 bar baz

- dchroot allows a single command, but invokes it automatically via
"sh -c":

$ dchroot -c chroot "foo --opt1 --opt2 bar baz"

The schroot syntax (which dchroot in sid is transiently using) is
rather more flexible, but if you want the dchroot semantics just
requires '-- sh -c "command"' instead of 'command'.

ahhh.. I think I understand now ;-)

Isn't the syntax in that original command, you posted from the bug report
actually telling the command dchroot to *ignore* any following 'options',
by
using the ' -- ' syntax, just after the command...IOW

Doesn't this;
dchroot -- -c "command"
mean: dchroot, ignore options that follow, then pass to it the -c
option (which it may ignore?), then "command".?

This would mean run the "-c" program with "command" as the first
option (!). Probably not quite what is desired.

I only ask b/c, I've learned (from lurking about usenet) that this
is one trick that's used to remove filenames that begin with a '-'
(hyphen), when using the 'rm' command.

Yes. It's used here so that dchroot/schroot can distinguish between
options for themselves and options for the program you want to run.
For example,

schroot ls -l

and

schroot -- ls -l

are different. With the former, schroot gets the "-l" option, but
with the latter ls gets it.

I see! -- thanks for that very clear explanation

BTW, any dchroot/schroot questions are welcome on the
buildd-tools-devel mailing list.

Okee-dokee ;-)
Still quite out of my league - but I'll surely keep that in mind.

Regards,
Roger

Same here - and thanks again for the details/info!

Regards

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