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ci: use pipeline values to define the CI_COMMIT_RANGE (#35348) 

PR Close #35348
This commit is contained in:
Joey Perrott 2020-02-11 14:56:25 -08:00 committed by Kara Erickson
parent 6091039223
commit a6aa35e598
3 changed files with 7 additions and 172 deletions
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7
.circleci/config.yml
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@ -140,7 +140,12 @@ commands:
init_environment:
description: Initializing environment (setting up variables)
steps:
- run: ./.circleci/env.sh
- run:
name: Set up environment
environment:
CIRCLE_GIT_BASE_REVISION: << pipeline.git.base_revision >>
CIRCLE_GIT_REVISION: << pipeline.git.revision >>
command: ./.circleci/env.sh
- run:
# Configure git as the CircleCI `checkout` command does.
# This is needed because we only checkout on the setup job.

6
.circleci/env.sh
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@ -27,11 +27,7 @@ setPublicVar CI_CHROMEDRIVER_VERSION_ARG "--versions.chrome 79.0.3945.130";
setPublicVar CI_COMMIT "$CIRCLE_SHA1";
# `CI_COMMIT_RANGE` is only used on push builds (a.k.a. non-PR, non-scheduled builds and rerun
# workflows of such builds).
# NOTE: With [CircleCI Pipelines](https://circleci.com/docs/2.0/build-processing) enabled,
# `CIRCLE_COMPARE_URL` is no longer available and the commit range cannot be reliably
# detected. Fall back to only considering the last commit (which is accurate in the majority
# of cases for push builds).
setPublicVar CI_COMMIT_RANGE "`[[ ${CIRCLE_PR_NUMBER:-false} != false ]] && echo "" || echo "$CIRCLE_SHA1~1...$CIRCLE_SHA1"`";
setPublicVar CI_COMMIT_RANGE "$CIRCLE_GIT_BASE_REVISION..$CIRCLE_GIT_REVISION";
setPublicVar CI_PULL_REQUEST "${CIRCLE_PR_NUMBER:-false}";
setPublicVar CI_REPO_NAME "$CIRCLE_PROJECT_REPONAME";
setPublicVar CI_REPO_OWNER "$CIRCLE_PROJECT_USERNAME";

166
.circleci/get-commit-range.js
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@ -1,166 +0,0 @@
#!/usr/bin/env node
/**
* **Usage:**
* ```
* node get-commit-range <build-number> [<compare-url> [<circle-token>]]
* ```
*
* Returns the commit range, either extracting it from `compare-url` (if defined), which is of the
* format of the `CIRCLE_COMPARE_URL` environment variable, or by retrieving the equivalent of
* `CIRCLE_COMPARE_URL` for jobs that are part of a rerun workflow and extracting it from there.
*
* > !!! WARNING !!!
* > !!
* > !! When [CircleCI Pipelines](https://circleci.com/docs/2.0/build-processing) is enabled, the
* > !! `CIRCLE_COMPARE_URL` environment variable is not available at all and this script does not
* > !! work.
* > !!!!!!!!!!!!!!!
*
* **Context:**
* CircleCI sets the `CIRCLE_COMPARE_URL` environment variable (from which we can extract the commit
* range) on push builds (a.k.a. non-PR, non-scheduled builds). Yet, when a workflow is rerun
* (either from the beginning or from failed jobs) - e.g. when a job flakes - CircleCI does not set
* the `CIRCLE_COMPARE_URL`.
*
* **Implementation details:**
* This script relies on the fact that all rerun workflows share the same CircleCI workspace and the
* (undocumented) fact that the workspace ID happens to be the same as the workflow ID that first
* created it.
*
* For example, for a job on push build workflows, the CircleCI API will return data that look like:
* ```js
* {
* compare: 'THE_COMPARE_URL_WE_ARE_LOOKING_FOR',
* //...
* previous: {
* // ...
* build_num: 12345,
* },
* //...
* workflows: {
* //...
* workflow_id: 'SOME_ID_A',
* workspace_id: 'SOME_ID_A', // Same as `workflow_id`.
* }
* }
* ```
*
* If the workflow is rerun, the data for jobs on the new workflow will look like:
* ```js
* {
* compare: null, // ¯\_(ツ)_/¯
* //...
* previous: {
* // ...
* build_num: 23456,
* },
* //...
* workflows: {
* //...
* workflow_id: 'SOME_ID_B',
* workspace_id: 'SOME_ID_A', // Different from current `workflow_id`.
* // Same as original `workflow_id`. \o/
* }
* }
* ```
*
* This script uses the `previous.build_num` (which points to the previous build number on the same
* branch) to traverse the jobs backwards, until it finds a job from the original workflow. Such a
* job (if found) should also contain the compare URL.
*
* **NOTE 1:**
* This is only useful on workflows which are created by rerunning a workflow for which
* `CIRCLE_COMPARE_URL` was defined.
*
* **NOTE 2:**
* The `circleToken` will be used for CircleCI API requests if provided, but it is not needed for
* accessing the read-only endpoints that we need (as long as the current project is FOSS and the
* corresponding setting is turned on in "Advanced Settings" in the project dashboard).
*
* ---
* Inspired by https://circleci.com/orbs/registry/orb/iynere/compare-url
* (source code: https://github.com/iynere/compare-url-orb).
*
* We are not using the `compare-url` orb for the following reasons:
* 1. (By looking at the code) it would only work if the rerun workflow is the latest workflow on
* the branch (which is not guaranteed to be true).
* 2. It is less efficient (e.g. makes unnecessary CircleCI API requests for builds on different
* branches, installs extra dependencies, persists files to the workspace (as a means of passing
* the result to the calling job), etc.).
* 3. It is slightly more complicated to setup and consume than our own script.
* 4. Its implementation is more complicated than needed for our usecase (e.g. handles different git
* providers, handles newly created branches, etc.).
*/
// Imports
const {get: httpsGet} = require('https');
// Constants
const API_URL_BASE = 'https://circleci.com/api/v1.1/project/github/angular/angular';
const COMPARE_URL_RE = /^.*\/([0-9a-f]+\.\.\.[0-9a-f]+)$/i;
// Run
_main(process.argv.slice(2));
// Helpers
async function _main([buildNumber, compareUrl = '', circleToken = '']) {
try {
if (!buildNumber || isNaN(buildNumber)) {
throw new Error(
'Missing or invalid arguments.\n' +
'Expected: buildNumber (number), compareUrl? (string), circleToken? (string)');
}
if (!compareUrl) {
compareUrl = await getCompareUrl(buildNumber, circleToken);
}
const commitRangeMatch = COMPARE_URL_RE.exec(compareUrl)
const commitRange = commitRangeMatch ? commitRangeMatch[1] : '';
console.log(commitRange);
} catch (err) {
console.error(err);
process.exit(1);
}
}
function getBuildInfo(buildNumber, circleToken) {
console.error(`BUILD ${buildNumber}`);
const url = `${API_URL_BASE}/${buildNumber}?circle-token=${circleToken}`;
return getJson(url);
}
async function getCompareUrl(buildNumber, circleToken) {
let info = await getBuildInfo(buildNumber, circleToken);
const targetWorkflowId = info.workflows.workspace_id;
while (info.workflows.workflow_id !== targetWorkflowId) {
info = await getBuildInfo(info.previous.build_num, circleToken);
}
return info.compare || '';
}
function getJson(url) {
return new Promise((resolve, reject) => {
const opts = {headers: {Accept: 'application/json'}};
const onResponse = res => {
const statusCode = res.statusCode || -1;
const isSuccess = (200 <= statusCode) && (statusCode < 400);
let responseText = '';
res.
on('error', reject).
on('data', d => responseText += d).
on('end', () => isSuccess ?
resolve(JSON.parse(responseText)) :
reject(`Error getting '${url}' (status ${statusCode}):\n${responseText}`));
};
httpsGet(url, opts, onResponse).
on('error', reject).
end();
});
}