Pmbootstrap development guide
pmb.helpers.run.user() instead of
subprocess because these write to the log file.
The passed commands gets interpreted as single command, and not executed in a shell. This means something like the following will not work:
pmb.chroot.root(args, ["echo", "test", ">", "/tmp/test"])
Instead, if you need shell functionality in the call, you can wrap the call with
sh -c. Here's one example with the parameters correctly escaped (you don't need to do that for the strings in this example, but if you pass variables then they should be escaped properly):
shell_cmd = "echo " + shutil.quote("test") + " > " + shutil.quote("/tmp/test") pmb.chroot.root(args, ["sh", "-c", shell_cmd])
Another technique (especially if you need to run many commands in the shell at once) is writing all commands down into a temporary file and executing it with the shell, see for example pmb/chroot/initfs.py.
Writing files to the chroot
The users in the chroots (root and pmos) have different user IDs than the user of the host system. Therefore we can't just write a file to anywhere in the chroot. But we can write to
/tmp and move the file afterwards:
with open("tmp/somefile", "w") as handle: handle.write("It works") pmb.chroot.root(args, ["mv", "/tmp/somefile", "/etc/somefile"])
Whenever you change the installation process, also adjust the recovery zip installer (which performs a good part of the installation procedure directly on the Android device with a shell script).