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download-artifact.ts
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download-artifact.ts
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import fs from 'fs/promises'
import * as github from '@actions/github'
import * as core from '@actions/core'
import * as httpClient from '@actions/http-client'
import unzip from 'unzip-stream'
import {
DownloadArtifactOptions,
DownloadArtifactResponse
} from '../shared/interfaces'
import {getUserAgentString} from '../shared/user-agent'
import {getGitHubWorkspaceDir} from '../shared/config'
import {internalArtifactTwirpClient} from '../shared/artifact-twirp-client'
import {
GetSignedArtifactURLRequest,
Int64Value,
ListArtifactsRequest
} from '../../generated'
import {getBackendIdsFromToken} from '../shared/util'
import {ArtifactNotFoundError} from '../shared/errors'
const scrubQueryParameters = (url: string): string => {
const parsed = new URL(url)
parsed.search = ''
return parsed.toString()
}
async function exists(path: string): Promise<boolean> {
try {
await fs.access(path)
return true
} catch (error) {
if (error.code === 'ENOENT') {
return false
} else {
throw error
}
}
}
async function streamExtract(url: string, directory: string): Promise<void> {
let retryCount = 0
while (retryCount < 5) {
try {
await streamExtractExternal(url, directory)
return
} catch (error) {
retryCount++
core.debug(
`Failed to download artifact after ${retryCount} retries due to ${error.message}. Retrying in 5 seconds...`
)
// wait 5 seconds before retrying
await new Promise(resolve => setTimeout(resolve, 5000))
}
}
throw new Error(`Artifact download failed after ${retryCount} retries.`)
}
export async function streamExtractExternal(
url: string,
directory: string
): Promise<void> {
const client = new httpClient.HttpClient(getUserAgentString())
const response = await client.get(url)
if (response.message.statusCode !== 200) {
throw new Error(
`Unexpected HTTP response from blob storage: ${response.message.statusCode} ${response.message.statusMessage}`
)
}
const timeout = 30 * 1000 // 30 seconds
return new Promise((resolve, reject) => {
const timerFn = (): void => {
response.message.destroy(
new Error(`Blob storage chunk did not respond in ${timeout}ms`)
)
}
const timer = setTimeout(timerFn, timeout)
response.message
.on('data', () => {
timer.refresh()
})
.on('error', (error: Error) => {
core.debug(
`response.message: Artifact download failed: ${error.message}`
)
clearTimeout(timer)
reject(error)
})
.pipe(unzip.Extract({path: directory}))
.on('close', () => {
clearTimeout(timer)
resolve()
})
.on('error', (error: Error) => {
reject(error)
})
})
}
export async function downloadArtifactPublic(
artifactId: number,
repositoryOwner: string,
repositoryName: string,
token: string,
options?: DownloadArtifactOptions
): Promise<DownloadArtifactResponse> {
const downloadPath = await resolveOrCreateDirectory(options?.path)
const api = github.getOctokit(token)
core.info(
`Downloading artifact '${artifactId}' from '${repositoryOwner}/${repositoryName}'`
)
const {headers, status} = await api.rest.actions.downloadArtifact({
owner: repositoryOwner,
repo: repositoryName,
artifact_id: artifactId,
archive_format: 'zip',
request: {
redirect: 'manual'
}
})
if (status !== 302) {
throw new Error(`Unable to download artifact. Unexpected status: ${status}`)
}
const {location} = headers
if (!location) {
throw new Error(`Unable to redirect to artifact download url`)
}
core.info(
`Redirecting to blob download url: ${scrubQueryParameters(location)}`
)
try {
core.info(`Starting download of artifact to: ${downloadPath}`)
await streamExtract(location, downloadPath)
core.info(`Artifact download completed successfully.`)
} catch (error) {
throw new Error(`Unable to download and extract artifact: ${error.message}`)
}
return {downloadPath}
}
export async function downloadArtifactInternal(
artifactId: number,
options?: DownloadArtifactOptions
): Promise<DownloadArtifactResponse> {
const downloadPath = await resolveOrCreateDirectory(options?.path)
const artifactClient = internalArtifactTwirpClient()
const {workflowRunBackendId, workflowJobRunBackendId} =
getBackendIdsFromToken()
const listReq: ListArtifactsRequest = {
workflowRunBackendId,
workflowJobRunBackendId,
idFilter: Int64Value.create({value: artifactId.toString()})
}
const {artifacts} = await artifactClient.ListArtifacts(listReq)
if (artifacts.length === 0) {
throw new ArtifactNotFoundError(
`No artifacts found for ID: ${artifactId}\nAre you trying to download from a different run? Try specifying a github-token with \`actions:read\` scope.`
)
}
if (artifacts.length > 1) {
core.warning('Multiple artifacts found, defaulting to first.')
}
const signedReq: GetSignedArtifactURLRequest = {
workflowRunBackendId: artifacts[0].workflowRunBackendId,
workflowJobRunBackendId: artifacts[0].workflowJobRunBackendId,
name: artifacts[0].name
}
const {signedUrl} = await artifactClient.GetSignedArtifactURL(signedReq)
core.info(
`Redirecting to blob download url: ${scrubQueryParameters(signedUrl)}`
)
try {
core.info(`Starting download of artifact to: ${downloadPath}`)
await streamExtract(signedUrl, downloadPath)
core.info(`Artifact download completed successfully.`)
} catch (error) {
throw new Error(`Unable to download and extract artifact: ${error.message}`)
}
return {downloadPath}
}
async function resolveOrCreateDirectory(
downloadPath = getGitHubWorkspaceDir()
): Promise<string> {
if (!(await exists(downloadPath))) {
core.debug(
`Artifact destination folder does not exist, creating: ${downloadPath}`
)
await fs.mkdir(downloadPath, {recursive: true})
} else {
core.debug(`Artifact destination folder already exists: ${downloadPath}`)
}
return downloadPath
}