summaryrefslogtreecommitdiffstats
path: root/pre_commit/languages/node.py
blob: 39f3000654081b6da1b66d4843a4019b9eb6b70d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
from __future__ import annotations

import contextlib
import functools
import os
import sys
from typing import Generator
from typing import Sequence

import pre_commit.constants as C
from pre_commit.envcontext import envcontext
from pre_commit.envcontext import PatchesT
from pre_commit.envcontext import UNSET
from pre_commit.envcontext import Var
from pre_commit.hook import Hook
from pre_commit.languages import helpers
from pre_commit.languages.python import bin_dir
from pre_commit.prefix import Prefix
from pre_commit.util import clean_path_on_failure
from pre_commit.util import cmd_output
from pre_commit.util import cmd_output_b
from pre_commit.util import rmtree

ENVIRONMENT_DIR = 'node_env'


@functools.lru_cache(maxsize=1)
def get_default_version() -> str:
    # nodeenv does not yet support `-n system` on windows
    if sys.platform == 'win32':
        return C.DEFAULT
    # if node is already installed, we can save a bunch of setup time by
    # using the installed version
    elif all(helpers.exe_exists(exe) for exe in ('node', 'npm')):
        return 'system'
    else:
        return C.DEFAULT


def _envdir(prefix: Prefix, version: str) -> str:
    directory = helpers.environment_dir(ENVIRONMENT_DIR, version)
    return prefix.path(directory)


def get_env_patch(venv: str) -> PatchesT:
    if sys.platform == 'cygwin':  # pragma: no cover
        _, win_venv, _ = cmd_output('cygpath', '-w', venv)
        install_prefix = fr'{win_venv.strip()}\bin'
        lib_dir = 'lib'
    elif sys.platform == 'win32':  # pragma: no cover
        install_prefix = bin_dir(venv)
        lib_dir = 'Scripts'
    else:  # pragma: win32 no cover
        install_prefix = venv
        lib_dir = 'lib'
    return (
        ('NODE_VIRTUAL_ENV', venv),
        ('NPM_CONFIG_PREFIX', install_prefix),
        ('npm_config_prefix', install_prefix),
        ('NPM_CONFIG_USERCONFIG', UNSET),
        ('npm_config_userconfig', UNSET),
        ('NODE_PATH', os.path.join(venv, lib_dir, 'node_modules')),
        ('PATH', (bin_dir(venv), os.pathsep, Var('PATH'))),
    )


@contextlib.contextmanager
def in_env(
        prefix: Prefix,
        language_version: str,
) -> Generator[None, None, None]:
    with envcontext(get_env_patch(_envdir(prefix, language_version))):
        yield


def health_check(prefix: Prefix, language_version: str) -> str | None:
    with in_env(prefix, language_version):
        retcode, _, _ = cmd_output_b('node', '--version', retcode=None)
        if retcode != 0:  # pragma: win32 no cover
            return f'`node --version` returned {retcode}'
        else:
            return None


def install_environment(
        prefix: Prefix, version: str, additional_dependencies: Sequence[str],
) -> None:
    additional_dependencies = tuple(additional_dependencies)
    assert prefix.exists('package.json')
    envdir = _envdir(prefix, version)

    # https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx?f=255&MSPPError=-2147217396#maxpath
    if sys.platform == 'win32':  # pragma: no cover
        envdir = fr'\\?\{os.path.normpath(envdir)}'
    with clean_path_on_failure(envdir):
        cmd = [
            sys.executable, '-mnodeenv', '--prebuilt', '--clean-src', envdir,
        ]
        if version != C.DEFAULT:
            cmd.extend(['-n', version])
        cmd_output_b(*cmd)

        with in_env(prefix, version):
            # https://npm.community/t/npm-install-g-git-vs-git-clone-cd-npm-install-g/5449
            # install as if we installed from git

            local_install_cmd = (
                'npm', 'install', '--dev', '--prod',
                '--ignore-prepublish', '--no-progress', '--no-save',
            )
            helpers.run_setup_cmd(prefix, local_install_cmd)

            _, pkg, _ = cmd_output('npm', 'pack', cwd=prefix.prefix_dir)
            pkg = prefix.path(pkg.strip())

            install = ('npm', 'install', '-g', pkg, *additional_dependencies)
            helpers.run_setup_cmd(prefix, install)

            # clean these up after installation
            if prefix.exists('node_modules'):  # pragma: win32 no cover
                rmtree(prefix.path('node_modules'))
            os.remove(pkg)


def run_hook(
        hook: Hook,
        file_args: Sequence[str],
        color: bool,
) -> tuple[int, bytes]:
    with in_env(hook.prefix, hook.language_version):
        return helpers.run_xargs(hook, hook.cmd, file_args, color=color)