Drop the weird flag file stuff for state management, and just always
mount the source code in, and always unmount it on exit - including in
the error path.
Signed-off-by: Caleb Connolly <caleb@postmarketos.org>
find_kbuild_output_dir() searches for certain path patterns, which
won't be in the APKBUILD if it uses downstreamkernel_package. Guess
the default kbuild out dir in that case.
Theoretically this might break if some APKBUILD passes weird paths to
downstreamkernel_package, but no kernel package in pmaports today does
that.
At the moment the "envkernel.sh hasn't run, assuming the kernel was
cross compiled on host and using current dir as source" code path
triggers even when using envkernel.sh, which works somewhat but
requires sourcing envkernel.sh again after each invocation of
"pmbootstrap build --envkernel ...".
The reason is that os.path.ismount() does not work for bind mounts
(see https://bugs.python.org/issue29707). There is a workaround for
that already in pmbootstrap but it is not used here for some reason.
Add support for packaging a kernel that was compiled outside of
envkernel. The envkernel.sh wrapper is great for someone new to kernel
development, but it makes it difficult to do things like "make
dt_binding_check". This lets you avoid the wrapper and build on your
host machine but still use pmbootstrap to package your kernel for easier
testing.
Replace "args.arch_native" with the direct function call in order to
avoid passing "args" to all functions. This is a step to get rid of this
args-passed-to-all-functions pattern in pmbootstrap.
While at it, also remove unnecessary "#!/usr/bin/env python3" in files
that only get imported, and adjust other empty/comment lines in the
beginnings of the files for consistency.
This makes files easier to read, and makes the pmbootstrap codebase more
consistent with the build.postmarketos.org codebase.
Currently, building with envkernel.sh entirely ignores the
makedepends listed in the kernel APKBUILD. Common dependencies
needed by most kernels are hardcoded in envkernel.sh.
However, some kernels may need extra dependencies either during
the build process or when the kernel is packaged.
Installing the makedepends when the build environment is initialized
is difficult because "source helpers/envkernel.sh" is not aware
of the exact kernel package that is going to be built later.
However, we can easily modify the packaging step
(i.e. pmbootstrap build --envkernel linux-...)
to install the required makedepends.
This fixes building "linux-postmarketos-qcom-msm8916" using envkernel,
since it requires "dtbTool" and "installkernel" to be installed when
the APKBUILD package() function is executed.
abuild depends on the gcc binary in order to define a default CBUILD value.
When using an alternative gcc version (e.g. envkernel.sh with gcc6), the
gcc binary is not installed by the envkernel.sh script.
This change sets the CBUILD env variable so that abuild doesn't need to
depend on the gcc package.
Provides a quick way to incrementally compile a kernel and push it to
device.
Example usage.
Compile the kernel:
$ cd /src/linux/
$ source /src/pmbootstrap/helpers/envkernel.sh
$ make tegra_postmarketos_defconfig
$ make -jX
Package kernel and flash to device:
$ pmbootstrap build --envkernel linux-samsung-p4wifi
$ pmbootstrap flasher flash_kernel
Modify kernel source then incremental compile, package, and flash:
$ make -jX
$ pmbootstrap build --envkernel linux-samsung-p4wifi
$ pmbootstrap flasher flash_kernel