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

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

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

import * as path from 'path';

import * as os from 'os';

import fs from 'fs';

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

import {isCacheFeatureAvailable} from './utils';

function isPyPyVersion(versionSpec: string) {

return versionSpec.startsWith('pypy');

}

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 resolveVersionInput(): string {

let version = core.getInput('python-version');

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

if (version && versionFile) {

core.warning(

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

);

}

if (version) {

return version;

}

const versionFilePath = path.join(

process.env.GITHUB_WORKSPACE!,

versionFile || '.python-version'

);

if (!fs.existsSync(versionFilePath)) {

throw new Error(

`The specified python version file at: ${versionFilePath} does not exist`

);

}

version = fs.readFileSync(versionFilePath, 'utf8');

core.info(`Resolved ${versionFile} as ${version}`);

return version;

}

async function run() {

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

core.debug(

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

);

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

} else {

core.debug(

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

);

}

try {

const version = resolveVersionInput();

if (version) {

let pythonVersion: string;

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

if (isPyPyVersion(version)) {

const installed = await finderPyPy.findPyPyVersion(version, arch);

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

core.info(

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

);

} else {

const installed = await finder.useCpythonVersion(version, arch);

pythonVersion = installed.version;

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

}

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(__dirname, '../..', '.github');

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

} catch (err) {

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

}

}

run();