Move to new Golang build process.

[Edu4rdSHL]

Hello,

I have created BlackArch/blackarch-pkgbuilds#10 in order to switch from the old Golang build process to a new one that brings a lot of advantages and is technically superior and simple.

Why

As mentioned previously, there are several advantages:

1. Option -trimpath to go build makes them system independent and help creating reproducible builds. The option instructs the compiler to remove all file system paths from the compiled executable. As a result, you will see module paths in stack traces instead of absolute paths of the build environment. Also prevents issues like Cameradar is compiled with hardcoded path prefixes which can't exist #3082.
2. Option -buildmode=pie build executables in Position-independent Code mode.
3. Option -mod=readonly resolve module imports, but fail if they must be reconfigured, means that it prevents the build process from modifying the go.mod file.
4. Option -modcacherw instructs the go command to leave newly-created directories in the module cache at their default permissions rather than making them read-only.
5. Option -ldflags "-s -w" strip DWARF, symbol table and debug info, it leads to ~25% binary size decrease or more in most cases.

Additionally to the previous mentioned benefits, this build mode will rarely fails.

TODO

If this proposition is accepted, then I will take care of migrating all packages that depend on Go to the new build model. Of course, help is welcome.

Regards,
Ed

[noptrix]

@Edu4rdSHL this is brilliant. thanks a lot!

[Edu4rdSHL]

TZAG,

After two days of hard work I have finished the migration of all the Go packages to the new build process as proposed here. The summary can be found in this attached file with the following conventions:

• PKGBUILD+ = Package was successfully migrated. dnsgrep and raven are two special cases where I have to make an "horrible hack" copying /usr/lib/go to $srcdir, perform other operations and change GOROOT while building. As it doesn't affect the end user, not even the build system, I didn't see any problem there.
• PKGBUILD- = Package was not migrated. Reason is put there as well.

Regards,
Ed