[build2] possible to do something similar to DESTDIR= make install?

[Norbert Lange]

Just so you don`t get any wrong hopes - I am not an Debian maintainer,
just using deb packages personally and at work, and got proficient at it.
Curiosity about C++Modules brought me toying with build2, I really dont know
much about it yet. Gonna see if I get as far as properly splitting everything.

The current sources are at: https://github.com/nolange/deb-build2-toolchain


The new option is working fine, thanks.

following the 3 step bootstrap from the docs so far,
some points:

1) there is no easy way to clean the in-place build. Its needed one
way or the other.
   Probably easiest if I just copy everything for now

2) running a b-boot clean after boostrap phase 2 will delete a few version.hxx
   and version files (source files!).
   Might check if thats a nasty bug?

3) first phase doesnt use threads, and is therefore rather slow.
    Would be possibly to check if the competition is available, and
create a rather simple makefile.


2017-08-13 16:58 GMT+02:00 Boris Kolpackov <boris at codesynthesis.com>:
> Norbert Lange <nolange79 at gmail.com> writes:
>
>> I just found out about build2 and would like to create a debian
>> package for easy (un)installation.
>
> Great. I will be glad to assist if you run into any other issues.
>
>
>> I am hanging on the install step, normally you would so a fake-install
>> and then archive the data.
>>
>> eg.
>> DESTDIR=/tmp/hugo make install
>>
>> would install an executable into /tmp/hugo/usr/bin
>>
>> To create (conforming) debian packages, both of build2 and software
>> that uses build2 such a mechanism is needed.
>> Might be that its already available, but I dint find any reference.
>
> I've implemented this and it's now available in the staged version:
>
> https://stage.build2.org/0/0.7.0-a.0/
>
> The new configuration variable is called config.install.chroot. Here is
> the usage example:
>
> b config.install.root=/usr config.install.chroot=/tmp/install install
>
>
>> Another relevant point is, that for building (conforming) debian
>> packages it is not allowed to access the net. This is possible for
>> build2 itself, I am not sure its possible for packages using it?
>
> Yes, sure. Every build2 package is a build2 project which means it
> can be downloaded, built, and installed manually, without using the
> bpkg package manager.
>
> In fact, if I were to create Debian packages of the toolchain, I
> wouldn't even use build2-toolchain. Instead I would first get
> libbutl and build2 and bootstrap the build system (see the INSTALL
> file inside build2/ for details). The result of this step will be
> two Debian packages: libbutl and build2.
>
> Then you can package libbpkg (which will use the build system and
> depend on libbutl). This will result in the libbpkg Debian package.
>
> Then you can package bpkg (which will use the build system and
> depend on libbpkg and libbutl).
>
> And that will get you the entire toolchain packaged.
>
> Boris