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import * as os from 'os';

import * as path from 'path';

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

import * as tc from '@actions/tool-cache';

import * as semver from 'semver';

import * as httpm from '@actions/http-client';

import * as ifm from '@actions/http-client/lib/interfaces';

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

import fs from 'fs';

import * as http from 'http';

import {

IS_WINDOWS,

IGraalPyManifestRelease,

createSymlinkInFolder,

isNightlyKeyword,

getBinaryDirectory,

getNextPageUrl

} from './utils';

const TOKEN = core.getInput('token');

const AUTH = !TOKEN ? undefined : `token ${TOKEN}`;

export async function installGraalPy(

graalpyVersion: string,

architecture: string,

allowPreReleases: boolean,

releases: IGraalPyManifestRelease[] | undefined

) {

let downloadDir;

releases = releases ?? (await getAvailableGraalPyVersions());

if (!releases || !releases.length) {

throw new Error('No release was found in GraalPy version.json');

}

let releaseData = findRelease(releases, graalpyVersion, architecture, false);

if (allowPreReleases && (!releaseData || !releaseData.foundAsset)) {

// check for pre-release

core.info(

[

`Stable GraalPy version ${graalpyVersion} with arch ${architecture} not found`,

`Trying pre-release versions`

].join(os.EOL)

);

releaseData = findRelease(releases, graalpyVersion, architecture, true);

}

if (!releaseData || !releaseData.foundAsset) {

throw new Error(

`GraalPy version ${graalpyVersion} with arch ${architecture} not found`

);

}

const {foundAsset, resolvedGraalPyVersion} = releaseData;

const downloadUrl = `${foundAsset.browser_download_url}`;

core.info(`Downloading GraalPy from "${downloadUrl}" ...`);

try {

const graalpyPath = await tc.downloadTool(downloadUrl, undefined, AUTH);

core.info('Extracting downloaded archive...');

downloadDir = await tc.extractTar(graalpyPath);

// root folder in archive can have unpredictable name so just take the first folder

// downloadDir is unique folder under TEMP and can't contain any other folders

const archiveName = fs.readdirSync(downloadDir)[0];

const toolDir = path.join(downloadDir, archiveName);

let installDir = toolDir;

if (!isNightlyKeyword(resolvedGraalPyVersion)) {

installDir = await tc.cacheDir(

toolDir,

'GraalPy',

resolvedGraalPyVersion,

architecture

);

}

const binaryPath = getBinaryDirectory(installDir);

await createGraalPySymlink(binaryPath, resolvedGraalPyVersion);

await installPip(binaryPath);

return {installDir, resolvedGraalPyVersion};

} catch (err) {

if (err instanceof Error) {

// Rate limit?

if (

err instanceof tc.HTTPError &&

(err.httpStatusCode === 403 || err.httpStatusCode === 429)

) {

core.info(

`Received HTTP status code ${err.httpStatusCode}. This usually indicates the rate limit has been exceeded`

);

} else {

core.info(err.message);

}

if (err.stack !== undefined) {

core.debug(err.stack);

}

}

throw err;

}

}

export async function getAvailableGraalPyVersions() {

const http: httpm.HttpClient = new httpm.HttpClient('tool-cache');

const headers: http.OutgoingHttpHeaders = {};

if (AUTH) {

headers.authorization = AUTH;

}

let url: string | null =

'https://api.github.com/repos/oracle/graalpython/releases';

const result: IGraalPyManifestRelease[] = [];

do {

const response: ifm.TypedResponse<IGraalPyManifestRelease[]> =

await http.getJson(url, headers);

if (!response.result) {

throw new Error(

`Unable to retrieve the list of available GraalPy versions from '${url}'`

);

}

result.push(...response.result);

url = getNextPageUrl(response);

} while (url);

return result;

}

async function createGraalPySymlink(

graalpyBinaryPath: string,

graalpyVersion: string

) {

const version = semver.coerce(graalpyVersion)!;

const pythonBinaryPostfix = semver.major(version);

const pythonMinor = semver.minor(version);

const graalpyMajorMinorBinaryPostfix = `${pythonBinaryPostfix}.${pythonMinor}`;

const binaryExtension = IS_WINDOWS ? '.exe' : '';

core.info('Creating symlinks...');

createSymlinkInFolder(

graalpyBinaryPath,

`graalpy${binaryExtension}`,

`python${pythonBinaryPostfix}${binaryExtension}`,

true

);

createSymlinkInFolder(

graalpyBinaryPath,

`graalpy${binaryExtension}`,

`python${binaryExtension}`,

true

);

createSymlinkInFolder(

graalpyBinaryPath,

`graalpy${binaryExtension}`,

`graalpy${graalpyMajorMinorBinaryPostfix}${binaryExtension}`,

true

);

}

async function installPip(pythonLocation: string) {

core.info(

"Installing pip (GraalPy doesn't update pip because it uses a patched version of pip)"

);

const pythonBinary = path.join(pythonLocation, 'python');

await exec.exec(`${pythonBinary} -m ensurepip --default-pip`);

}

export function graalPyTagToVersion(tag: string) {

const versionPattern = /.*-(\d+\.\d+\.\d+(?:\.\d+)?)((?:a|b|rc))?(\d*)?/;

const match = tag.match(versionPattern);

if (match && match[2]) {

return `${match[1]}-${match[2]}.${match[3]}`;

} else if (match) {

return match[1];

} else {

return tag.replace(/.*-/, '');

}

}

export function findRelease(

releases: IGraalPyManifestRelease[],

graalpyVersion: string,

architecture: string,

includePrerelease: boolean

) {

const options = {includePrerelease: includePrerelease};

const filterReleases = releases.filter(item => {

const isVersionSatisfied = semver.satisfies(

graalPyTagToVersion(item.tag_name),

graalpyVersion,

options

);

return (

isVersionSatisfied && !!findAsset(item, architecture, process.platform)

);

});

if (!filterReleases.length) {

return null;

}

const sortedReleases = filterReleases.sort((previous, current) =>

semver.compare(

semver.coerce(graalPyTagToVersion(current.tag_name))!,

semver.coerce(graalPyTagToVersion(previous.tag_name))!

)

);

const foundRelease = sortedReleases[0];

const foundAsset = findAsset(foundRelease, architecture, process.platform);

return {

foundAsset,

resolvedGraalPyVersion: graalPyTagToVersion(foundRelease.tag_name)

};

}

export function toGraalPyPlatform(platform: string) {

switch (platform) {

case 'win32':

return 'windows';

case 'darwin':

return 'macos';

}

return platform;

}

export function toGraalPyArchitecture(architecture: string) {

switch (architecture) {

case 'x64':

return 'amd64';

case 'arm64':

return 'aarch64';

}

return architecture;

}

export function findAsset(

item: IGraalPyManifestRelease,

architecture: string,

platform: string

) {

const graalpyArch = toGraalPyArchitecture(architecture);

const graalpyPlatform = toGraalPyPlatform(platform);

const found = item.assets.filter(

file =>

file.name.startsWith('graalpy') &&

file.name.endsWith(`-${graalpyPlatform}-${graalpyArch}.tar.gz`)

);

/*

In the future there could be more variants of GraalPy for a single release. Pick the shortest name, that one is the most likely to be the primary variant.

*/

found.sort((f1, f2) => f1.name.length - f2.name.length);

return found[0];

}