workspace.wix.resolved

resolve_workspace.py

import os
import subprocess
import sys
import re

TEMPLATE_NAME = "WORKSPACE.wix.resolved"

# this information will be retrieved from a service (one place for source of truth)
repos = {"natansil/repo_a":"git@github.com:natansil/repo_a.git",
         "natansil/repo_b":"git@github.com:natansil/repo_b.git"}

last_commits = {}

for repo, repo_url in repos.iteritems():
    last_commit = subprocess.check_output(['git', 'ls-remote', '--heads', repo_url, 'refs/heads/master']).decode("utf-8").splitlines()[0].split('\t')[0]
    last_commits[repo] = last_commit

print last_commits

workspace_file_already_resolved = False
template_file_already_resolved = False
cwd = os.getcwd()
for file in os.listdir(cwd):
    if file == "WORKSPACE":
        workspace_file_already_resolved = True
        print("already has WORKSPACE!")
        sys.exit(0)
    if file == TEMPLATE_NAME:
        template_file_already_resolved = True

if not template_file_already_resolved:
    raise ValueError("template file ({}) is missing".format(TEMPLATE_NAME))

with open(file) as template_file:
    template_content = template_file.read()

http_archive_target_tokens = template_content.split("http_archive")
del http_archive_target_tokens[0]

for token in http_archive_target_tokens:
    print token + "======\n"

replacements = {}
for repo, value_of_last_commit in last_commits.iteritems():
    for http_archive in http_archive_target_tokens:
        match = re.search(r'url.*"https://github.com/%s/archive/(.*).zip' % repo, http_archive)
        if match:
            template_commit_hash =  match.group(1)
            print ("match: %s" % template_commit_hash)
            if value_of_last_commit == template_commit_hash:
                print ("for %s: no need to replace %s" % (repo, template_commit_hash))
            else:
                print ("for %s: replace hash %s with hash %s" % (repo, template_commit_hash, value_of_last_commit))
                replacements[template_commit_hash] = value_of_last_commit
                break

print "replacements: %s" % replacements

for template_commit_hash_key, value in replacements.iteritems():
    template_content = template_content.replace(template_commit_hash_key, value, 2)
    print "content with replacements: %s" % template_content

with open("WORKSPACE", 'w') as output_workspace_file:
    output_workspace_file.write(template_content)