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Remove state tracking, use KAS_WORK_DIR env variable

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Config.has_changed didn't work reliably so far, so the state cache was
only allowing to associate a work directory with configuration file.
However this was rather unintuitive, specifically when moving the work
dir to a different home - nothing told the user about the persistent
association.

We therefore agreed to remove the state cache for now. It can be
reintroduced at any time once a consistent usage model exists.

To establish a relationship to a work directory inside a shell session,
kas now evaluates the KAS_WORK_DIR environment variable.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
This commit is contained in:
Jan Kiszka
2017-06-19 12:50:19 +02:00
committed by Daniel Wagner
parent fe39f9f370
commit c65657cac6
4 changed files with 7 additions and 98 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
README.md
View File

@@ -29,7 +29,6 @@ Dependencies & installation
This projects depends on
- Python 3
- configparser
- PyYAML
If you need Python 2 support consider sending patches. The most
@@ -67,6 +66,10 @@ manually, e.g.
$ kas shell /path/to/kas-project.yml -c 'bitbake dosfsutils-native'
```
kas will place downloads and build artifacts under the current directory when
being invoked. You can specify a different location via the environment variable
`KAS_WORK_DIR`.
Use Cases
---------

1
kas/build.py
View File

@@ -67,7 +67,6 @@ class Build:
macro.add(ReposCheckout())
macro.add(SetupEnviron())
# TODO if cfg.has_changed() was not working properly
macro.add(WriteConfig())
# Build

42
kas/config.py
View File

@@ -26,10 +26,8 @@ import logging
import errno
import json
import platform
import hashlib
import yaml
from .repos import Repo
from .kasstate import KasState
from .libkas import run_cmd
__license__ = 'MIT'
@@ -38,41 +36,15 @@ __copyright__ = 'Copyright (c) Siemens AG, 2017'
class Config:
def __init__(self):
self.state = KasState()
def _get_prop(self, item, default):
return self.state.get_option(self.section, item, default)
def _set_prop(self, item, value):
self.state.set_option(self.section, item, value)
@property
def section(self):
return os.path.realpath(self.filename)
self.__kas_work_dir = os.environ.get('KAS_WORK_DIR', os.getcwd())
@property
def build_dir(self):
return self._get_prop('build_dir', os.getcwd() + '/build')
@build_dir.setter
def build_dir(self, value):
self._set_prop('build_dir', value)
return os.path.join(self.__kas_work_dir, 'build')
@property
def kas_work_dir(self):
return self._get_prop('kas_work_dir', os.getcwd())
@kas_work_dir.setter
def kas_work_dir(self, value):
self._set_prop('kas_work_dir', value)
@property
def hash(self):
return self._get_prop('config_hash', 0)
@hash.setter
def hash(self, value):
self._set_prop('config_hash', value)
return self.__kas_work_dir
def setup_environ(self):
(distro, version, id) = platform.dist()
@@ -91,9 +63,6 @@ class Config:
def get_repo_ref_dir(self):
return os.environ.get('KAS_REPO_REF_DIR', None)
def has_changed(self):
return self.config_hash != self.hash
class ConfigPython(Config):
def __init__(self, filename, target):
@@ -103,7 +72,6 @@ class ConfigPython(Config):
with open(self.filename) as file:
env = {}
data = file.read()
self.hash = hashlib.sha512(str(data).encode('utf-8')).hexdigest()
exec(data, env)
self._config = env
except IOError:
@@ -291,8 +259,6 @@ class ConfigJson(ConfigStatic):
self.filename = os.path.abspath(filename)
try:
with open(self.filename, 'r') as f:
self.hash = hashlib.sha512(f.read().encode('utf-8')).hexdigest()
f.seek(0)
self._config = json.load(f)
except json.decoder.JSONDecodeError as msg:
logging.error('Could not load JSON config: {}'.format(msg))
@@ -320,8 +286,6 @@ class ConfigYaml(ConfigStatic):
self.filename = os.path.abspath(filename)
try:
with open(self.filename, 'r') as f:
self.hash = hashlib.sha512(f.read().encode('utf-8')).hexdigest()
f.seek(0)
self._config = yaml.load(f)
except yaml.loader.ParserError as msg:
logging.error('Could not load YAML config: {}'.format(msg))

57
kas/kasstate.py
View File

@@ -1,57 +0,0 @@
# kas - setup tool for bitbake based projects
#
# Copyright (c) Siemens AG, 2017
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
import codecs
import os
from configparser import SafeConfigParser
__license__ = 'MIT'
__copyright__ = 'Copyright (c) Siemens AG, 2017'
class KasState:
def __init__(self):
self.filename = os.path.join(os.environ.get('XDG_CONFIG_HOME',
os.path.expandvars('$HOME/.config')),
os.path.join('kas', 'kasstate.ini'))
self.parser = SafeConfigParser()
try:
with codecs.open(self.filename, 'r', encoding='utf-8') as f:
self.parser.readfp(f)
except:
pass
def __del__(self):
if not os.path.exists(os.path.dirname(self.filename)):
os.makedirs(os.path.dirname(self.filename))
with codecs.open(self.filename, 'w', encoding='utf-8') as f:
self.parser.write(f)
def get_option(self, section, option, default):
if not self.parser.has_option(section, option):
self.set_option(section, option, default)
return self.parser.get(section, option)
def set_option(self, section, option, value):
if not self.parser.has_section(section):
self.parser.add_section(section)
self.parser.set(section, option, value)