Date: Tue, 30 Jul 2019 11:24:49 -0700 From: Theron Tarigo <theron@freebsd.org> To: soc-status@freebsd.org Subject: GSoC: Separation of Ports Build Process from Local Installation Message-ID: <1102f554-ed70-c497-af06-c94c8d0a1725@freebsd.org>
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Hello all, This project aims to decouple the build process of the ports framework from the local installation. To work around the assumptions made by ports about dependency file locations, a userspace tool to remap processes' filesystem namespaces is under development: freebsd-user-namespace, provided as port devel/userns. This past week, I investigated the problems of incompatibilities between port Makefile special cases and the new mode of ports building. Right now, usage of a modified environment as required by the approach is handled for standard do-configure, do-build, etc. targets but not for port-defined targets. Furthermore, usage of absolute paths in Make targets must be handled specially since a constraint of this project has been to not require anything from ports to be installed system-wide. Several approaches or prototypes and experiments thereof have been tried: 1. For each known BUILD_DEPENDS which is a command, make that command available in a special PATH. 2. Use Make's .SHELL feature to intercept all Make target commands in a wrapper shell which sets up the environment. 3. Set environment directly from Make 5. Rewrite _ALL_ ports which define targets to use a Make variable which may set the required environment. 7. Run entire top-level Make command under the required environment. Each of these is not appropriate as a general solution. Instead, bsd.port.mk will be modified to run all targets (do-configure, do-build, do-install, etc.) in a sub-make with modified environment, while all scripts (do-depends.sh etc.) will continue to be run as they are currently. What I am working on next: - Implement the planned sub-make fix described above. Test ports and debug. - Compare the packages built by separated-build method to either official packages or ports built by original FreeBSD method. Any differences should be attributable to built times and hostnames. - Debug the ports which fail by segfaut or buserror; this implicates userns library. - Provide more thorough documentation of PORTS_SEPARATED_BUILD, in particular its usage and its limitations, so that users and devs interested in this project can more easily test it for themselves. Project goals and status are kept at https://wiki.freebsd.org/SummerOfCode2019Projects/PortsSeparatedBuild . Source of the userspace filesystem namespace tool is shared at https://github.com/therontarigo/freebsd-user-namespace . Changes to ports framework are shared at https://github.com/freebsd/freebsd-ports/compare/master...therontarigo:separated . Theron Tarigo
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