iris-bot

#!/usr/bin/python3
import sys, os, subprocess
import requests
from datetime import datetime, timezone

################################################################################
# This script lets you autoamtically trigger some operations on the Iris CI to
# do further test/analysis on a branch (usually an MR).
# Set the GITLAB_TOKEN environment variable to a GitLab access token.
# Set at least one of IRIS_REV or STDPP_REV to control which branches of these
# projects to build against (defaults to default git branch). IRIS_REPO and
# STDPP_REPO can be used to take branches from forks. Setting IRIS to
# "user:branch" will use the given branch on that user's fork of Iris, and
# similar for STDPP.
#
# Supported commands:
# - `./iris-bot build [$filter]`: Builds all reverse dependencies against the
#   given branches. The optional `filter` argument only builds projects whose
#   names contains that string.
# - `./iris-bot time $project`: Measure the impact of this branch on the build
#   time of the given reverse dependency. Only Iris branches are supported for
#   now.
################################################################################

PROJECTS = {
    'lambda-rust': { 'name': 'lambda-rust', 'branch': 'master', 'timing': True },
    'lambda-rust-weak': { 'name': 'lambda-rust', 'branch': 'masters/weak_mem' }, # covers GPFSL and ORC11
    'examples': { 'name': 'examples', 'branch': 'master', 'timing': True },
    'iron': { 'name': 'iron', 'branch': 'master' },
    'reloc': { 'name': 'reloc', 'branch': 'master' },
    'spygame': { 'name': 'spygame', 'branch': 'master' },
    'time-credits': { 'name': 'time-credits', 'branch': 'master' },
    'actris': { 'name': 'actris', 'branch': 'master' },
    'tutorial-popl20': { 'name': 'tutorial-popl20', 'branch': 'master' },
    'tutorial-popl21': { 'name': 'tutorial-popl21', 'branch': 'master' },
}

if not "GITLAB_TOKEN" in os.environ:
    print("You need to set the GITLAB_TOKEN environment variable to a GitLab access token.")
    print("You can create such tokens at <https://gitlab.mpi-sws.org/profile/personal_access_tokens>.")
    print("Make sure you grant access to the 'api' scope.")
    sys.exit(1)
GITLAB_TOKEN = os.environ["GITLAB_TOKEN"]

# Pre-processing for branch variables of dependency projects: you can set
# 'PROJECT' to 'user:branch', or set 'PROJECT_REPO' and 'PROJECT_REV'
# automatically.
BUILD_BRANCHES = {}
for project in ['stdpp', 'iris', 'orc11', 'gpfsl']:
    var = project.upper()
    if var in os.environ:
        (repo, rev) = os.environ[var].split(':')
        repo = repo + "/" + project
    else:
        repo = os.environ.get(var+"_REPO", "iris/"+project)
        rev = os.environ.get(var+"_REV")
    if rev is not None:
        BUILD_BRANCHES[project] = (repo, rev)

if not "iris" in BUILD_BRANCHES:
    print("Please set IRIS_REV, STDPP_REV, ORC11_REV and GPFSL_REV environment variables to the branch/tag/commit of the respective project that you want to use.")
    print("Only IRIS_REV is mandatory, the rest defaults to the default git branch.")
    sys.exit(1)

# Things Pythonr eally should have...
def list_get(l, i, default=None):
    return l[i] if len(l) > i else default

# Useful helpers
def trigger_build(project, branch, vars):
    id = "iris%2F{}".format(project)
    url = "https://gitlab.mpi-sws.org/api/v4/projects/{}/pipeline".format(id)
    json = {
        'ref': branch,
        'variables': [{ 'key': key, 'value': val } for (key, val) in vars.items()],
    }
    r = requests.post(url, headers={'PRIVATE-TOKEN': GITLAB_TOKEN}, json=json)
    r.raise_for_status()
    return r.json()['web_url']

# The commands
def build():
    # Convert BUILD_BRANCHES into suitable dictionary
    vars = {}
    for project in BUILD_BRANCHES.keys():
        (repo, rev) = BUILD_BRANCHES[project]
        var = project.upper()
        vars[var+"_REPO"] = repo
        vars[var+"_REV"] = rev
    # Loop over all projects, and trigger build.
    filter = list_get(sys.argv, 2, '')
    for (name, project) in PROJECTS.items():
        if filter in name:
            print("Triggering build for {}...".format(name))
            pipeline_url = trigger_build(project['name'], project['branch'], vars)
            print("    Pipeline running at {}".format(pipeline_url))

def time():
    # Make sure only 'iris' variables are set.
    for project in BUILD_BRANCHES.keys():
        if project != 'iris':
            print("'time' command only supports Iris branches")
            sys.exit(1)
    (iris_repo, iris_rev) = BUILD_BRANCHES['iris']
    # Get project to test and ensure it supports timing
    project_name = list_get(sys.argv, 2)
    if project_name is None or project_name not in PROJECTS:
        print("ERROR: a specific project must be used for timing")
        sys.exit(1)
    project = PROJECTS[project_name]
    if not project.get('timing'):
        print("ERROR: {} does not support timing".format(project_name))
        sys.exit(1)
    # Obtain a unique ID for this experiment
    id = datetime.now(timezone.utc).strftime("%Y%m%d-%H%M%S")
    # Determine the branch commit to build
    subprocess.run(["git", "fetch", "-q", "https://gitlab.mpi-sws.org/{}".format(iris_repo), iris_rev], check=True)
    test_commit = subprocess.run(["git", "rev-parse", "FETCH_HEAD"], check=True, stdout=subprocess.PIPE).stdout.decode().strip()
    # Determine the base commit in master
    subprocess.run(["git", "fetch", "-q", "origin"], check=True)
    base_commit = subprocess.run(["git", "merge-base", test_commit, "origin/master"], check=True, stdout=subprocess.PIPE).stdout.decode().strip()
    # Trigger the builds
    print("Triggering timing builds for {} base commit ({}) and test commit ({}) with ad-hoc ID {}...".format(project_name, base_commit[:8], test_commit[:8], id))
    vars = {
        'IRIS_REPO': iris_repo,
        'IRIS_REV': base_commit,
        'TIMING_AD_HOC_ID': id+"-base",
    }
    base_pipeline_url = trigger_build(project['name'], project['branch'], vars)
    print("    Base pipeline running at {}".format(base_pipeline_url))
    vars = {
        'IRIS_REPO': iris_repo,
        'IRIS_REV': test_commit,
        'TIMING_AD_HOC_ID': id+"-test",
    }
    test_pipeline_url = trigger_build(project['name'], project['branch'], vars)
    print("    Test pipeline running at {}".format(test_pipeline_url))
    print("    Once done, timing comparison will be available at https://coq-speed.mpi-sws.org/d/1QE_dqjiz/coq-compare?orgId=1&var-project={}&var-branch1=@hoc&var-config1={}&var-branch2=@hoc&var-config2={}".format(project['name'], id+"-base", id+"-test"))

# Dispatch
command = list_get(sys.argv, 1, '')
if command == 'build':
    build()
elif command == 'time':
    time()
else:
    print("ERROR: unsupported or no command")
    sys.exit(1)