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import * as core from '@actions/core';

import * as finder from './find-python.js';

import * as finderPyPy from './find-pypy.js';

import * as finderGraalPy from './find-graalpy.js';

import {isMirrorCustomized} from './install-python.js';

import * as path from 'path';

import * as os from 'os';

import {fileURLToPath} from 'url';

import fs from 'fs';

import {getCacheDistributor} from './cache-distributions/cache-factory.js';

import {

isCacheFeatureAvailable,

logWarning,

IS_MAC,

getVersionInputFromFile,

getVersionsInputFromPlainFile

} from './utils.js';

function isPyPyVersion(versionSpec: string) {

return versionSpec.startsWith('pypy');

}

function isGraalPyVersion(versionSpec: string) {

return versionSpec.startsWith('graalpy');

}

// `mirror` only redirects CPython distributions. PyPy and GraalPy resolve from

// downloads.python.org and the GitHub releases API respectively, so warn rather

// than let the input look like it applied. Only warns when the user actually

// set a custom mirror: action.yml gives `mirror` a default, so a plain

// getInput() check would fire on every pypy-*/graalpy-* run.

function warnIfMirrorUnsupported(versionSpec: string) {

if (!isMirrorCustomized()) {

return;

}

const implementation = isPyPyVersion(versionSpec) ? 'PyPy' : 'GraalPy';

core.warning(

`The 'mirror' input only applies to CPython distributions and is ignored for ${implementation} ('${versionSpec}'), which is downloaded from its own upstream source.`

);

}

async function cacheDependencies(cache: string, pythonVersion: string) {

const cacheDependencyPath =

core.getInput('cache-dependency-path') || undefined;

const cacheDistributor = getCacheDistributor(

cache,

pythonVersion,

cacheDependencyPath

);

await cacheDistributor.restoreCache();

}

function resolveVersionInputFromDefaultFile(): string[] {

const couples: [string, (versionFile: string) => string[]][] = [

['.python-version', getVersionsInputFromPlainFile]

];

for (const [versionFile, _fn] of couples) {

logWarning(

`Neither 'python-version' nor 'python-version-file' inputs were supplied. Attempting to find '${versionFile}' file.`

);

if (fs.existsSync(versionFile)) {

return _fn(versionFile);

} else {

logWarning(`${versionFile} doesn't exist.`);

}

return [];

}

function resolveVersionInput() {

let versions = core.getMultilineInput('python-version');

const versionFile = core.getInput('python-version-file');

if (versions.length) {

if (versionFile) {

core.warning(

'Both python-version and python-version-file inputs are specified, only python-version will be used.'

);

}

} else {

if (versionFile) {

if (!fs.existsSync(versionFile)) {

throw new Error(

`The specified python version file at: ${versionFile} doesn't exist.`

);

}

versions = getVersionInputFromFile(versionFile);

} else {

versions = resolveVersionInputFromDefaultFile();

}

return versions;

}

async function run() {

if (IS_MAC) {

process.env['AGENT_TOOLSDIRECTORY'] = '/Users/runner/hostedtoolcache';

}

if (process.env.AGENT_TOOLSDIRECTORY?.trim()) {

process.env['RUNNER_TOOL_CACHE'] = process.env['AGENT_TOOLSDIRECTORY'];

}

core.debug(

`Python is expected to be installed into ${process.env['RUNNER_TOOL_CACHE']}`

);

try {

const versions = resolveVersionInput();

const checkLatest = core.getBooleanInput('check-latest');

const allowPreReleases = core.getBooleanInput('allow-prereleases');

const freethreaded = core.getBooleanInput('freethreaded');

if (versions.length) {

let pythonVersion = '';

const arch: string = core.getInput('architecture') || os.arch();

const updateEnvironment = core.getBooleanInput('update-environment');

core.startGroup('Installed versions');

for (const version of versions) {

if (isPyPyVersion(version)) {

warnIfMirrorUnsupported(version);

const installed = await finderPyPy.findPyPyVersion(

version,

arch,

updateEnvironment,

checkLatest,

allowPreReleases

);

pythonVersion = `${installed.resolvedPyPyVersion}-${installed.resolvedPythonVersion}`;

core.info(

`Successfully set up PyPy ${installed.resolvedPyPyVersion} with Python (${installed.resolvedPythonVersion})`

);

} else if (isGraalPyVersion(version)) {

warnIfMirrorUnsupported(version);

const installed = await finderGraalPy.findGraalPyVersion(

version,

arch,

updateEnvironment,

checkLatest,

allowPreReleases

);

pythonVersion = `${installed}`;

core.info(`Successfully set up GraalPy ${installed}`);

} else {

if (version.startsWith('2')) {

core.warning(

'The support for python 2.7 was removed on June 19, 2023. Related issue: https://github.com/actions/setup-python/issues/672'

);

}

const installed = await finder.useCpythonVersion(

version,

arch,

updateEnvironment,

checkLatest,

allowPreReleases,

freethreaded

);

pythonVersion = installed.version;

core.info(`Successfully set up ${installed.impl} (${pythonVersion})`);

}

core.endGroup();

const cache = core.getInput('cache');

if (cache && isCacheFeatureAvailable()) {

await cacheDependencies(cache, pythonVersion);

}

} else {

core.warning(

'The `python-version` input is not set. The version of Python currently in `PATH` will be used.'

);

}

const matchersPath = path.join(

path.dirname(fileURLToPath(import.meta.url)),

'../..',

'.github'

);

core.info(`##[add-matcher]${path.join(matchersPath, 'python.json')}`);

} catch (err) {

core.setFailed((err as Error).message);

}

run();