d6bb42e8ba
`activate` is bash syntax, so fish users had no way to take on the dev environment. `activate.fish` does what `activate` does: snapshots the keys it will change, applies the composed env, defines a `hermes` function that refuses outside the worktree, adds the prompt prefix, and defines `deactivate`. It shells out to the same bash library, so composition is not reimplemented. `pm.environments --format fish` emits the env as `set -gx` statements. fish's read-only names (`PWD`, `SHLVL`, `_`, ...) are skipped because `set -gx PWD` aborts the script, and values named `*PATH` stay lists. `hermes_compose_env` takes the dialect (`sh` or `fish`) as its second argument.
76 lines
2.7 KiB
Python
76 lines
2.7 KiB
Python
"""``pm.environments.shell_exports``: the composed environment as a script a shell can evaluate.
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Every shell that takes on the environment (``activate``, ``activate.fish``,
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``scripts/run-in-hermes-env``) evaluates this output, so the contract is what a
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real shell reads back: any value survives its dialect's quoting, and names the
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shell cannot assign are left out instead of failing the whole script.
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"""
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from __future__ import annotations
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import shutil
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import subprocess
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import pytest
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from pm.environments import shell_exports
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from tests.pm.activation_support import bash
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NASTY = {
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"PLAIN": "value",
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"SPACES": "a b c",
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"QUOTES": "it's a \"test\"",
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"SHELL_SYNTAX": "$HOME `id` $(id) ; & | > < * ? [x] ~ #",
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"BACKSLASHES": "C:\\path\\to\\ \\n \\'",
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"EMPTY": "",
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"MULTILINE": "first\nsecond",
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}
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# Prints each value NUL-terminated, in the order of NASTY; `$NAME` reads the same in both shells.
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PROBE = "printf '%s\\0' " + " ".join(f'"${name}"' for name in NASTY)
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def _shell(dialect: str) -> list[str]:
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if dialect == "sh":
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return [bash(), "-c"]
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found = shutil.which("fish")
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if found is None:
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pytest.skip("fish is not installed")
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return [found, "--no-config", "-c"]
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@pytest.mark.platforms("posix")
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@pytest.mark.parametrize("dialect", ["sh", "fish"])
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def test_a_real_shell_reads_every_value_back_unchanged(dialect):
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script = shell_exports(NASTY, dialect) + "\n" + PROBE
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run = subprocess.run([*_shell(dialect), script], capture_output=True, text=True, timeout=30)
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assert run.returncode == 0, run.stderr
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assert run.stdout.split("\0")[:-1] == list(NASTY.values())
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@pytest.mark.platforms("posix")
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def test_fish_keeps_path_variables_as_lists():
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script = shell_exports({"PATH": "/a b:/c", "PYTHONPATH": "/x:/y"}, "fish")
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run = subprocess.run(
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[*_shell("fish"), script + "\nprintf '%s ' (count $PATH) (count $PYTHONPATH)"],
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capture_output=True, text=True, timeout=30,
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)
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assert run.returncode == 0, run.stderr
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assert run.stdout.split() == ["2", "2"]
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@pytest.mark.platforms("posix")
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def test_fish_read_only_variables_do_not_abort_the_script():
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script = shell_exports({"PWD": "/elsewhere", "SHLVL": "9", "AFTER": "reached"}, "fish")
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run = subprocess.run([*_shell("fish"), script + "\nprintf %s $AFTER"],
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capture_output=True, text=True, timeout=30)
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assert run.returncode == 0 and run.stderr == "", run.stderr
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assert run.stdout == "reached"
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@pytest.mark.parametrize("dialect", ["sh", "fish"])
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def test_names_no_shell_can_assign_are_left_out(dialect):
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script = shell_exports({"ProgramFiles(ARM)": "x", "1BAD": "x", "GOOD": "y"}, dialect)
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assert "GOOD" in script
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assert "ProgramFiles" not in script and "1BAD" not in script
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