99ce8366ed
fa3b5e5e57cd4649d577e06a3aca798b55a75fd5 ci: Use nproc over MAKEJOBS in 01_base_install (MarcoFalke)
Pull request description:
Currently `$MAKEJOBS` is the default value in `01_base_install.sh` when building the container image.
This problem can't be fixed (see below), so just use `nproc` for now.
Other solutions would be bad:
* Passing in the `MAKEJOBS` as a dockerfile env would create a new image if the number of tasks are changed, seems verbose and confusing.
* Leaving `master` as-is would leave CPUs unused if there are more than `4`.
ACKs for top commit:
fanquake:
ACK - I think this is fine as-is, it's an improvement over the current state fa3b5e5e57cd4649d577e06a3aca798b55a75fd5
Tree-SHA512: 15014eb7b548945737b0fed5cd46f0cd4b72b1d54d044f60fce628f914053a2de6518878428a54822d236d08d6f257d8c464d3fb589400f4be56022d2ec8676d
CI Scripts
This directory contains scripts for each build step in each build stage.
Running a Stage Locally
Be aware that the tests will be built and run in-place, so please run at your own risk. If the repository is not a fresh git clone, you might have to clean files from previous builds or test runs first.
The ci needs to perform various sysadmin tasks such as installing packages or writing to the user's home directory. While it should be fine to run the ci system locally on you development box, the ci scripts can generally be assumed to have received less review and testing compared to other parts of the codebase. If you want to keep the work tree clean, you might want to run the ci system in a virtual machine with a Linux operating system of your choice.
To allow for a wide range of tested environments, but also ensure reproducibility to some extent, the test stage
requires bash, docker, and python3 to be installed. To install all requirements on Ubuntu, run
sudo apt install bash docker.io python3
It is recommended to run the ci system in a clean env. To run the test stage with a specific configuration,
env -i HOME="$HOME" PATH="$PATH" USER="$USER" bash -c 'FILE_ENV="./ci/test/00_setup_env_arm.sh" ./ci/test_run_all.sh'
Configurations
The test files (FILE_ENV) are constructed to test a wide range of
configurations, rather than a single pass/fail. This helps to catch build
failures and logic errors that present on platforms other than the ones the
author has tested.
Some builders use the dependency-generator in ./depends, rather than using
the system package manager to install build dependencies. This guarantees that
the tester is using the same versions as the release builds, which also use
./depends.
It is also possible to force a specific configuration without modifying the file. For example,
env -i HOME="$HOME" PATH="$PATH" USER="$USER" bash -c 'MAKEJOBS="-j1" FILE_ENV="./ci/test/00_setup_env_arm.sh" ./ci/test_run_all.sh'
The files starting with 0n (n greater than 0) are the scripts that are run
in order.
Cache
In order to avoid rebuilding all dependencies for each build, the binaries are cached and re-used when possible. Changes in the dependency-generator will trigger cache-invalidation and rebuilds as necessary.