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import os
import pytest
import hashlib
import tempfile
from ruamel import yaml
from tests.testutils import cli, generate_junction, create_element_size, create_repo
from buildstream import _yaml
from buildstream._yamlcache import YamlCache
from buildstream._project import Project
from buildstream._context import Context
from contextlib import contextmanager
def generate_project(tmpdir, ref_storage, with_junction, name="test"):
if with_junction == 'junction':
subproject_dir = generate_project(
tmpdir, ref_storage,
'no-junction', name='test-subproject'
)
project_dir = os.path.join(tmpdir, name)
os.makedirs(project_dir)
# project.conf
project_conf_path = os.path.join(project_dir, 'project.conf')
elements_path = 'elements'
project_conf = {
'name': name,
'element-path': elements_path,
'ref-storage': ref_storage,
}
_yaml.dump(project_conf, project_conf_path)
# elements
if with_junction == 'junction':
junction_name = 'junction.bst'
junction_dir = os.path.join(project_dir, elements_path)
junction_path = os.path.join(project_dir, elements_path, junction_name)
os.makedirs(junction_dir)
generate_junction(tmpdir, subproject_dir, junction_path)
element_depends = [{'junction': junction_name, 'filename': 'test.bst'}]
else:
element_depends = []
element_name = 'test.bst'
create_element_size(element_name, project_dir, elements_path, element_depends, 1)
return project_dir
@contextmanager
def with_yamlcache(project_dir):
context = Context()
project = Project(project_dir, context)
cache_file = YamlCache.get_cache_file(project_dir)
with YamlCache.open(context, cache_file) as yamlcache:
yield yamlcache, project
def yamlcache_key(yamlcache, in_file, copy_tree=False):
with open(in_file) as f:
key = yamlcache._calculate_key(f.read(), copy_tree)
return key
def modified_file(input_file, tmpdir):
with open(input_file) as f:
data = f.read()
assert 'variables' not in data
data += '\nvariables: {modified: True}\n'
_, temppath = tempfile.mkstemp(dir=tmpdir, text=True)
with open(temppath, 'w') as f:
f.write(data)
return temppath
@pytest.mark.parametrize('ref_storage', ['inline', 'project.refs'])
@pytest.mark.parametrize('with_junction', ['no-junction', 'junction'])
@pytest.mark.parametrize('move_project', ['move', 'no-move'])
def test_yamlcache_used(cli, tmpdir, ref_storage, with_junction, move_project):
# Generate the project
project = generate_project(str(tmpdir), ref_storage, with_junction)
if with_junction == 'junction':
result = cli.run(project=project, args=['source', 'fetch', '--track', 'junction.bst'])
result.assert_success()
# bst show to put it in the cache
result = cli.run(project=project, args=['show', 'test.bst'])
result.assert_success()
element_path = os.path.join(project, 'elements', 'test.bst')
with with_yamlcache(project) as (yc, prj):
# Check that it's in the cache
assert yc.is_cached(prj, element_path)
# *Absolutely* horrible cache corruption to check it's being used
# Modifying the data from the cache is fraught with danger,
# so instead I'll load a modified version of the original file
temppath = modified_file(element_path, str(tmpdir))
contents = _yaml.load(temppath, copy_tree=False, project=prj)
key = yamlcache_key(yc, element_path)
yc.put_from_key(prj, element_path, key, contents)
# Show that a variable has been added
result = cli.run(project=project, args=['show', '--deps', 'none', '--format', '%{vars}', 'test.bst'])
result.assert_success()
data = yaml.safe_load(result.output)
assert 'modified' in data
assert data['modified'] == 'True'
@pytest.mark.parametrize('ref_storage', ['inline', 'project.refs'])
@pytest.mark.parametrize('with_junction', ['junction', 'no-junction'])
def test_yamlcache_changed_file(cli, tmpdir, ref_storage, with_junction):
# i.e. a file is cached, the file is changed, loading the file (with cache) returns new data
# inline and junction can only be changed by opening a workspace
# Generate the project
project = generate_project(str(tmpdir), ref_storage, with_junction)
if with_junction == 'junction':
result = cli.run(project=project, args=['source', 'fetch', '--track', 'junction.bst'])
result.assert_success()
# bst show to put it in the cache
result = cli.run(project=project, args=['show', 'test.bst'])
result.assert_success()
element_path = os.path.join(project, 'elements', 'test.bst')
with with_yamlcache(project) as (yc, prj):
# Check that it's in the cache then modify
assert yc.is_cached(prj, element_path)
with open(element_path, "a") as f:
f.write('\nvariables: {modified: True}\n')
# Load modified yaml cache file into cache
_yaml.load(element_path, copy_tree=False, project=prj, yaml_cache=yc)
# Show that a variable has been added
result = cli.run(project=project, args=['show', '--deps', 'none', '--format', '%{vars}', 'test.bst'])
result.assert_success()
data = yaml.safe_load(result.output)
assert 'modified' in data
assert data['modified'] == 'True'
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