mirror of
https://github.com/systemd/systemd.git
synced 2024-11-01 17:51:22 +03:00
71 lines
3.3 KiB
Plaintext
71 lines
3.3 KiB
Plaintext
HACKING ON SYSTEMD
|
|
|
|
We welcome all contributions to systemd. If you notice a bug or a missing
|
|
feature, please feel invited to fix it, and submit your work as a github Pull
|
|
Request (PR):
|
|
|
|
https://github.com/systemd/systemd/pull/new
|
|
|
|
Please make sure to follow our Coding Style when submitting patches. See
|
|
CODING_STYLE for details. Also have a look at our Contribution Guidelines:
|
|
|
|
https://github.com/systemd/systemd/blob/master/.github/CONTRIBUTING.md
|
|
|
|
Please always test your work before submitting a PR. For many of the components
|
|
of systemd testing is straight-forward as you can simply compile systemd and
|
|
run the relevant tool from the build directory.
|
|
|
|
For some components (most importantly, systemd/PID1 itself) this is not
|
|
possible, however. In order to simplify testing for cases like this we provide
|
|
a set of "mkosi" build files directly in the source tree. "mkosi" is a tool for
|
|
building clean OS images from an upstream distribution in combination with a
|
|
fresh build of the project in the local working directory. To make use of this,
|
|
please acquire "mkosi" from https://github.com/systemd/mkosi first, unless your
|
|
distribution has packaged it already and you can get it from there. After the
|
|
tool is installed it is sufficient to type "mkosi" in the systemd project
|
|
directory to generate a disk image "image.raw" you can boot either in
|
|
systemd-nspawn or in an UEFI-capable VM:
|
|
|
|
# systemd-nspawn -bi image.raw
|
|
|
|
or:
|
|
|
|
# qemu-kvm -m 512 -smp 2 -bios /usr/share/edk2/ovmf/OVMF_CODE.fd -hda image.raw
|
|
|
|
Every time you rerun the "mkosi" command a fresh image is built, incorporating
|
|
all current changes you made to the project tree.
|
|
|
|
Alternatively, you may install the systemd version from your git check-out
|
|
directly on top of your host system's directory tree. This mostly works fine,
|
|
but of course you should know what you are doing as you might make your system
|
|
unbootable in case of a bug in your changes. Also, you might step into your
|
|
package manager's territory with this. Be careful!
|
|
|
|
And never forget: most distributions provide very simple and convenient ways to
|
|
install all development packages necessary to build systemd. For example, on
|
|
Fedora the following command line should be sufficient to install all of
|
|
systemd's build dependencies:
|
|
|
|
# dnf builddep systemd
|
|
|
|
Putting this all together, here's a series of commands for preparing a patch
|
|
for systemd (this example is for Fedora):
|
|
|
|
$ sudo dnf builddep systemd # install build dependencies
|
|
$ sudo dnf install mkosi # install tool to quickly build images
|
|
$ git clone https://github.com/systemd/systemd.git
|
|
$ cd systemd
|
|
$ vim src/core/main.c # or wherever you'd like to make your changes
|
|
$ ./autogen.sh c # configure the source tree
|
|
$ make -j `nproc` # build it locally, see if everything compiles fine
|
|
$ make -j `nproc` check # run some simple regression tests
|
|
$ sudo mkosi # build a test image
|
|
$ sudo systemd-nspawn -bi image.raw # boot up the test image
|
|
$ git add -p # interactively put together your patch
|
|
$ git commit # commit it
|
|
$ ...
|
|
|
|
And after that, please submit your branch as PR to systemd via github.
|
|
|
|
Happy hacking!
|