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set JULIA_DEPOT_PATH #3711

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Merged
asottile merged 1 commit into from
Jul 15, 2026
+22 −0
Merged

set JULIA_DEPOT_PATH #3711

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7 changes: 7 additions & 0 deletions pre_commit/languages/julia.py
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Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,13 @@ def get_env_patch(target_dir: str, version: str) -> PatchesT:
('JULIA_LOAD_PATH', target_dir),
# May be set, remove it to not interfer with LOAD_PATH
('JULIA_PROJECT', UNSET),
# Keep the package depot inside the hook environment so installed
# packages and precompile caches persist with the env instead of
# leaking into a shared depot. The trailing separator leaves an empty
# entry, which julia expands to its default depots. This keeps the
# bundled stdlib resources (and their precompile caches) available so
# hooks don't recompile from scratch on first run.
('JULIA_DEPOT_PATH', os.path.join(target_dir, 'depot') + os.pathsep),
)


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15 changes: 15 additions & 0 deletions tests/languages/julia_test.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,9 @@
import os
from unittest import mock

from pre_commit import constants as C
from pre_commit.languages import julia
from pre_commit.prefix import Prefix
from testing.language_helpers import run_language
from testing.util import cwd

Expand Down Expand Up @@ -42,6 +44,19 @@ def test_julia_hook_with_startup(tmp_path):
test_julia_hook(tmp_path)


def test_julia_hook_installs_into_env_local_depot(tmp_path):
code = """
using Example
println("Hello, world!")
"""
_make_hook(tmp_path, code)

julia.install_environment(Prefix(str(tmp_path)), C.DEFAULT, ())

d = tmp_path.joinpath('juliaenv-default', 'depot', 'packages', 'Example')
assert d.is_dir()


def test_julia_hook_manifest(tmp_path):
code = """
using Example
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