- debpython is the commands `py3compile` and `py3clean` from Debian. I
am calling them that because a large chunk of their source code is
found inside a folder inside Debian's source code named "debpython"
- 5348f70466
- rather than packaging `.pyc` files into packages, `py3compile` and
`py3clean` can be called from `postinst` and `prerm` scripts to
generate all `.pyc` for the `.py` files in the package immediately
after the package is installed, and remove all `.pyc` files immediately
before uninstalling the package, respectively
- fixes the error `trying to overwrite '/data/data/com.termux/files/usr/lib/python3.12/__pycache__/cProfile.cpython-312.pyc'` when packages were built on-device, but at the same time, also:
- prevents the warnings `dpkg: warning: while removing python, directory '/data/data/com.termux/files/usr/lib/python3.12/site-packages' not empty so not removed` as long as no packages were installed using `pip`
- The `termux_step_create_python_debscripts.sh` can configure work on debpython (i.e. its `py3copile` and `py3clean` commands) from the glibc package `python-glibc`, if some glibc package is being compiled.
- New variables have been implemented:
- `TERMUX_PYTHON_CROSSENV_BUILDHOME` - location of crossenv's python build libraries.
- `TERMUX_PKG_PYTHON_RUNTIME_DEPS` - configures the installation of the python modules via pip3 in the pkg's debscripts. If not configured in the package, it will use the value from `TERMUX_PKG_PYTHON_TARGET_DEPS`. If the variable is set to `false`, then the customization of installing python modules will be disabled, even if the `TERMUX_PKG_PYTHON_TARGET_DEPS` variable is set in the package.
- `TERMUX_SUBPKG_PYTHON_RUNTIME_DEPS` - configures the installation of the python modules via pip3 in the subpkg's debscripts.
- Implemented reconfiguration of prefixes in python module `sysconfig` and setting in `TERMUX_PYTHON_CROSSENV_BUILDHOME`, so that python modules from crossenv building can specify system paths of termux for correct compilation.
- Added automatic addition of `python-glibc{-glibc}` dependency when using the `TERMUX_PKG_PYTHON_RUNTIME_DEPS` (for pkg; will be disabled, i.e. will not be added, if the variable is set to `false`) or `TERMUX_SUBPKG_PYTHON_RUNTIME_DEPS` (for subpkg) value.
> How to add a new Python package after this?
Everything is the same, except, now, this block is no longer necessary in `build.sh`.
```bash
termux_step_create_debscripts() {
cat <<- EOF > ./postinst
#!$TERMUX_PREFIX/bin/sh
echo "Installing dependencies through pip..."
pip3 install ${TERMUX_PKG_PYTHON_TARGET_DEPS//, / }
EOF
}
```
- Instead, `scripts/build/termux_step_create_python_debscripts.sh` can now detect the presence of `pip` package lists in `$TERMUX_PKG_PYTHON_TARGET_DEPS`, `$TERMUX_SUBPKG_PYTHON_TARGET_DEPS`, and the `METADATA` file of the Python package if it exists, and automatically insert them as a block into the `postinst` script for all relevant packages.
- `$TERMUX_PKG_PYTHON_TARGET_DEPS` is used for `pip` dependencies that are both on-device build-time and on-device run-time dependencies, and `$TERMUX_PKG_PYTHON_RUNTIME_DEPS` is used for runtime-only `pip` dependencies. `$TERMUX_PKG_PYTHON_RUNTIME_DEPS` overrides `$TERMUX_PKG_PYTHON_TARGET_DEPS` for runtime dependencies,
- i.e. if `TERMUX_PKG_PYTHON_RUNTIME_DEPS` is not specified, but `TERMUX_PKG_PYTHON_TARGET_DEPS` is, then `TERMUX_PKG_PYTHON_TARGET_DEPS` will be used as both on-device build and on-device runtime dependencies,
- but if `TERMUX_PKG_PYTHON_RUNTIME_DEPS` is specified, then `TERMUX_PKG_PYTHON_TARGET_DEPS`, if specified, is used only for on-device build-time dependencies.
- If `python-pip` is not already in the dependencies of any package that needs it, the build will fail with an error instructing maintainers to add `python-pip` to the dependencies of the package that needs it.
Co-authored-by: Maxython <mixython@gmail.com>
