Don't pass stdin to commands that aren't supposed to be used
interactively (output: log, background, pipe).
This fixes an inconsistency between building packages in CI on gitlab
and building them via bpo on sourcehut or locally. In gitlab, apparently
there is no stdin for the entire build job and so unanswered kernel
config prompts will just use the default. In local builds and on
sourcehut stdin is available and so it just hangs at the prompt until
pmbootstrap kills the build job due to no output being written.
I considered adding an additional check to pmaports to ensure that there
are no unanswered kernel config prompts just in case users run abuild
manually on the kernel APKBUILD with stdin available. But I think
forcing the users to answer all the prompts even if it's not really
needed just creates additional work / makes the workflow worse without
real benefit.
Related: https://builds.sr.ht/~postmarketos/job/824373#task-pmbootstrap_build-432
Fixes: pmaports issue 1225
Replace "args.cache" with a global variable 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.
Replace "args.logfd" with "pmb.helpers.logging.logfd" in order to avoid
passing "args" to all functions that only use it to write to logfd. This
is the first step to get rid of this args-passed-to-all-functions
pattern in pmbootstrap.
Many of pmbootstrap's actions require root rights. When after requesting
sudo access pmbootstrap takes longer than the sudo timeout interval to finish
execution, the password will have to be entered again on the next sudo
action.
This change adds an opt-in feature to run sudo -v in a background loop
in order to prevent having to enter the password more than once for a single
pmbootstrap run. The loop runs as a daemon timer which automatically gets
canceled when pmbootstrap exits.
Closes: #1677
Replace the "kill_as_root" argument with a much simpler "sudo" argument
and remove the now obsolete check for the output mode of "kill_as_root".
"kill_as_root" would only get set to True if both conditions are met:
a) command is running with sudo
b) command is running with an output mode ("log" or "stdout") where
pmb.helpers.run_core would kill it if it does not output anything
before a timeout is reached
The new "sudo" argument just indicates if the command is running with
sudo (a), regardless of the output mode (b).
This adds a new output mode "pipe" that is identical to the existing
"background" mode except for that its stdout is redirected into a
pipe so that it can be retrieved.
Before this commit, pmb.helpers.run_core.sanity_checks would raise
a runtime error when pmb.helpers.run.root was called with an output
mode that did not support timeouts (like background).
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.
When the timeout occurs it is important to ensure clean up of child
processes. Killing only the direct process created by a command can
leave child processes running.
For example a pmbootstrap.py install will run apk add. This run command
creates multiple processes as follows:
(cmd line arguments snipped for readability)
$ ps -e -o pid,ppid,pgid,cmd
PID PPID PGID CMD
31738 23247 31738 python3 ./pmbootstrap.py -t 15 install --no-fde
31746 31738 31738 sudo env -i /bin/sh -c ... ;apk --no-progress add
31747 31746 31738 /bin/sh -c ... ;apk --no-progress add
31748 31747 31738 apk --no-progress add
The root process of the run command is PID 31746. We want to kill
the child processes too. Otherwise only running kill -9 31746 will leave
the processes 31747 and 31748 running.
Oliver Smith
Bart Ribbers
Anjandev Momi
BO41
Maxim Karasev
Caio Fontes
Johannes Marbach
Oliver Smith
Robert Yang