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References: <20151028181756.4715b37c@vostro>
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From: Christian Kampka <christian@kampka.net>
Date: Thu, 29 Oct 2015 11:14:35 +0000
Message-ID: <CADq4isTmVgVYXyXcDD=YZ5ASLA1TvUNBDpnVP2Z+jP1+th2f0g@mail.gmail.com>
Subject: Re: [alpine-devel] apk-tools ideas
To: Timo Teras <timo.teras@iki.fi>, alpine-devel@lists.alpinelinux.org
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Hi,

since you are opening a wishlist, I'd like to see a feature that allows to
divert binaries through apk.
For reference, Debian offers such a feature through dpkg-divert[1].

What diversion basically provide is a way to tell apk that binary foo is
not to be installed in /usr/bin/foo but /usr/bin/foo.orig instead. Any
update of the package providing foo will then update the binary located at
/usr/bin/foo.orig instead of /usr/bin/foo.
I find this useful for replacing binaries with wrappers that provide
additional functionality. This is typically a problem if you use tooling
like ansible for your deployment that expects a binary in a certain place,
eg. the apk binary.
Tooling aside, may binaries are expected to be in a certain location, eg.
/usr/sbin/sendmail, which is currently provided by postfix. An admin might
want to place another sendmail in that path to provide the functionality
without causing a potential conflict with the apk system.

It would be great if apk would allow this.

 Cheers,
Christian

[1] http://manpages.debian.org/cgi-bin/man.cgi?query=dpkg-divert

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<div dir=3D"ltr">Hi,<div><br></div><div>since you are opening a wishlist, I=
&#39;d like to see a feature that allows to divert binaries through apk.</d=
iv><div>For reference, Debian offers such a feature through dpkg-divert[1].=
</div><div><br></div><div>What diversion basically provide is a way to tell=
 apk that binary foo is not to be installed in /usr/bin/foo but /usr/bin/fo=
o.orig instead. Any update of the package providing foo will then update th=
e binary located at /usr/bin/foo.orig instead of /usr/bin/foo.=C2=A0</div><=
div>I find this useful for replacing binaries with wrappers that provide ad=
ditional functionality. This is typically a problem if you use tooling like=
 ansible for your deployment that expects a binary in a certain place, eg. =
the apk binary.</div><div>Tooling aside, may binaries are expected to be in=
 a certain location, eg. /usr/sbin/sendmail, which is currently provided by=
 postfix. An admin might want to place another sendmail in that path to pro=
vide the functionality without causing a potential conflict with the apk sy=
stem.</div><div><br></div><div>It would be great if apk would allow this.</=
div><div><br></div><div>=C2=A0Cheers,</div><div>Christian</div><div><br></d=
iv><div>[1] <a href=3D"http://manpages.debian.org/cgi-bin/man.cgi?query=3Dd=
pkg-divert">http://manpages.debian.org/cgi-bin/man.cgi?query=3Ddpkg-divert<=
/a></div></div>

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