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https://github.com/containers/podman-compose.git
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e97d446a04
`podman-compose` currently does not support interpolating environment variables in dictionary keys, despite the compose file specification indicating this capability. See the relevant compose-spec documentation: https://github.com/compose-spec/compose-spec/blob/main/12-interpolation.md This feature is useful in `labels` or `environment` sections, where keys can be user-defined strings. To enable interpolation, an alternate equal sign syntax must be used, e.g.: services: foo: labels: - "$VAR_NAME=label_value" After this PR `podman-compose` will align more closely with the compose file specification, allowing for the interpolation of environment variables in dictionary keys. Signed-off-by: Monika Kairaityte <monika@kibit.lt>
105 lines
3.6 KiB
Python
105 lines
3.6 KiB
Python
# SPDX-License-Identifier: GPL-2.0
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# pylint: disable=protected-access
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import unittest
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from typing import Any
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from parameterized import parameterized
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from podman_compose import rec_subs
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class TestRecSubs(unittest.TestCase):
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substitutions = [
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# dict with environment variables
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(
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"service's environment is low priority",
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{"environment": {"v1": "low priority", "actual-v1": "$v1"}},
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{"environment": {"v1": "low priority", "actual-v1": "high priority"}},
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),
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(
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"service's environment can be used in other values",
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{"environment": {"v100": "v1.0.0", "image": "abc:$v100"}},
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{"environment": {"v100": "v1.0.0", "image": "abc:v1.0.0"}},
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),
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(
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"Non-variable should not be substituted",
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{"environment": {"non_var": "$$v1", "vx": "$non_var"}, "image": "abc:$non_var"},
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{"environment": {"non_var": "$v1", "vx": "$v1"}, "image": "abc:$v1"},
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),
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(
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"service environment with unpopulated ${VARIABLE:-default} format",
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{"environment": {"v100": "${v100:-low priority}", "actual-v100": "$v100"}},
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{"environment": {"v100": "low priority", "actual-v100": "low priority"}},
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),
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(
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"service environment with populated ${VARIABLE:-default} format",
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{"environment": {"v1": "${v1:-low priority}", "actual-v1": "$v1"}},
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{"environment": {"v1": "high priority", "actual-v1": "high priority"}},
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),
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# list
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(
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"Values in list are substituted",
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["$v1", "low priority"],
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["high priority", "low priority"],
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),
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# str
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(
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"Value with ${VARIABLE} format",
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"${v1}",
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"high priority",
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),
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(
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"Value with ${VARIABLE:-default} format",
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["${v1:-default}", "${empty:-default}", "${not_exits:-default}"],
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["high priority", "default", "default"],
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),
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(
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"Value with ${VARIABLE-default} format",
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["${v1-default}", "${empty-default}", "${not_exits-default}"],
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["high priority", "", "default"],
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),
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(
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"Value $$ means $",
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"$$v1",
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"$v1",
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),
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]
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@parameterized.expand(substitutions)
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def test_rec_subs(self, desc: str, input: Any, expected: Any) -> None:
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sub_dict = {"v1": "high priority", "empty": ""}
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result = rec_subs(input, sub_dict)
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self.assertEqual(result, expected, msg=desc)
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def test_env_var_substitution_in_dictionary_keys(self) -> None:
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sub_dict = {"NAME": "TEST1", "NAME2": "TEST2"}
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input = {
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'services': {
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'test': {
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'image': 'busybox',
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'labels': {
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'$NAME and ${NAME2}': '${NAME2} and $NAME',
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'test1.${NAME}': 'test1',
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'$NAME': '${NAME2}',
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'${NAME}.test2': 'Host(`${NAME2}`)',
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},
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}
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}
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}
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result = rec_subs(input, sub_dict)
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expected = {
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'services': {
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'test': {
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'image': 'busybox',
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'labels': {
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'TEST1 and TEST2': 'TEST2 and TEST1',
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'test1.TEST1': 'test1',
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'TEST1': 'TEST2',
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'TEST1.test2': 'Host(`TEST2`)',
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},
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}
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}
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}
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self.assertEqual(result, expected)
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