How to get SHA of commit for Xcode Bot "Run Script" Trigger? Updating status of tests on Github

Question

I have created an Xcode Bot that integrates on each commit.

In the "Run Script" Trigger I would like to update the current GitHub commit with the integration status of Tests that were run. Pretty standard CI stuff.

I'll then be running a script like the below:

curl -i -X POST -H "Content-type: application/json"
-H 'Authorization: token TOKEN_HERE' -d 
'{
"state": "success",
"target_url": "https://example.com/build/status",
"description": "The build succeeded!",
"context": "continuous-integration/jenkins"
}' 
https://api.github.com/repos/ORGANIZATION_HERE/REPO_HERE/statuses/SHA_HERE

It looks like I'll be able to get the success or failure states from the Xcode Bot Environment variables:

Access build folder in Xcode Server CI bot run (env variables?)

However, the SHA of the current commit is not listed. How am I able to get the SHA of the commit used for the Integration at this point, to be used in the GitHub Status API request?

Answer 1

I am using this code in my Xcode Bot triggers to get the SHA of the commit:

git -C ${XCS_SOURCE_DIR}/name_of_your_git_repo rev-parse HEAD

And this to get the branch name:

git -C ${XCS_SOURCE_DIR}/name_of_your_git_repo rev-parse --abbrev-ref HEAD

This executes a git command in the source directory, replace "name_of_your_git_repo" by the name of your repository on git

Answer 2

XCS_OUTPUT_DIR has a file called sourceControl.log. This file has logs like the following:

"DVTSourceControlLocationRevisionKey" : "3787c0d9e5107861a8b8d4c7300b2d414ad41dbb",

You can parse that log to find the SHA.

Perhaps more practically, CaveJohnson can pull the SHA:

PATH=/Library/Frameworks/Python.framework/Versions/3.4/bin:$PATH
SHA=`cavejohnson getSha`

Or it can just go ahead and set the GitHub status as a one-liner:

#!/bin/bash
PATH=/Library/Frameworks/Python.framework/Versions/3.4/bin:$PATH
cavejohnson setGithubStatus

Notably, there are more statuses than just success and failure, there are at least 6 that I'm aware of. You can read more about them in my Xcode 6 CI Missing Manual.

Answer 3

Using the cavejohnson code in the other answer, which gets the hash from certain keys an Xcode log, I ran into an issue where the returned hash was an outdated one from the last build.

I'm now instead using git rev-parse HEAD to get the hash of the commit that was actually used in the CI build. I've submitted this as a revision to cavejohnson.

Use get_sha() to retrieve the SHA-1 hash:

def get_sha():
    return get_repo_sha(get_git_directory())

def get_git_directory():
    for subdir in os.listdir('.'):
        if is_git_directory(subdir):
            return subdir
    assert False

def is_git_directory(path = '.'):
    return subprocess.call(['git', '-C', path, 'status'], stderr=subprocess.STDOUT, stdout = open(os.devnull, 'w')) == 0    

def get_repo_sha(repo):
    sha = subprocess.check_output(['git', 'rev-parse', 'HEAD'], cwd=repo).decode('ascii').strip()
    return sha