Почему bash - фиговый скриптовый язык

Как я разбирался с CONFIG_PROTECT

Как проверить

CONFIG_PROTECT

CONFIG_PROTECT_MASK

etc-update

			local mpath
			for mpath in ${CONFIG_PROTECT_MASK}; do
				mpath="${EROOT%/}${mpath}"
				if [[ "${rpath}" == "${mpath}"* ]] ; then
					${QUIET} || echo "Updating masked file: ${live_file}"
					mv "${cfg_file}" "${live_file}"
					continue 2
				fi
			done

dispatch-conf

 	#
        # Remove new configs identical to current
        #                  and
        # Auto-replace configs a) whose differences are simply CVS interpolations,
        #                  or  b) whose differences are simply ws or comments,
        #                  or  c) in paths now unprotected by CONFIG_PROTECT_MASK,
        #

        def f (conf):

Что ищется в исходниках

from .chk_updated_cfg_files import chk_updated_cfg_files

config_protect = portage.util.shlex_split(
	settings.get("CONFIG_PROTECT", ""))

	chk_updated_cfg_files(settings['EROOT'], config_protect)

def find_updated_config_files(target_root, config_protect):
	"""
	Return a tuple of configuration files that needs to be updated.
	The tuple contains lists organized like this:
		[protected_dir, file_list]
	If the protected config isn't a protected_dir but a procted_file, list is:
		[protected_file, None]
	If no configuration files needs to be updated, None is returned
	"""

	"find '%s' -maxdepth 1 -name '._cfg????_%s'"

Как нужно назвать файл-копию

emerge --config

--config

Run package specific actions needed to be executed after the emerge process has completed. This usually entails configuration file setup or other similar setups that the user may wish to run.

Сухой остаток

Второй раунд разборок

portageq

docstrings['is_protected'] = """ 
	Given a single filename, return code 0 if it's protected, 1 otherwise.
	The filename must begin with .
	"""
is_protected.__doc__ = docstrings['is_protected']

filter_protected <eroot>
      Read filenames from stdin and write them to stdout if they are protected.
      All filenames are delimited by \n and must begin with .

def new_protect_filename(mydest, newmd5=None, force=False):
	"""Resolves a config-protect filename for merging, optionally
	using the last filename if the md5 matches. If force is True,
	then a new filename will be generated even if mydest does not
	exist yet.
	(dest,md5) ==> 'string'            --- path_to_target_filename
	(dest)     ==> ('next', 'highest') --- next_target and most-recent_target
	"""

Как бы вызвать питоновую функцию из bash?

In order to store the result in a variable, you can therefore do:

RESULT_FOO=`python -c 'import test; print test.get_foo()'`

or, equivalently

RESULT=$(python -c 'import test; print test.get_foo()')

since backticks and $(…) evaluate a command and replace it by its output.

Как передать параметр

Как положить вывод команды в переменную

#!/bin/bash

# Test whether python exit status propagates.

function die () {
    echo "$1"
    exit 1
}

arg=/etc/shells
python <<EOF

import portage

print(portage.new_protect_filename("${arg}"))
EOF
exit_status=$?
if [ $exit_status -ne 0 ]; then
    die "Error: Python protect filename failed!"
fi