track sha of master in test_pr messages

tools/test_pr.py

@@ -1,288 +1,291
 #!/usr/bin/env python
 """
 This is a script for testing pull requests for IPython. It merges the pull
 request with current master, installs and tests on all available versions of
 Python, and posts the results to Gist if any tests fail.
 
 Usage:
     python test_pr.py 1657
 """
 from __future__ import print_function
 
 import errno
 from glob import glob
 import io
 import json
 import os
 import pickle
 import re
 import requests
 import shutil
 import time
 from subprocess import call, check_call, check_output, PIPE, STDOUT, CalledProcessError
 import sys
 
 import gh_api
 from gh_api import Obj
 
 basedir = os.path.join(os.path.expanduser("~"), ".ipy_pr_tests")
 repodir = os.path.join(basedir, "ipython")
 ipy_repository = 'git://github.com/ipython/ipython.git'
 ipy_http_repository = 'http://github.com/ipython/ipython.git'
 gh_project="ipython/ipython"
 
 supported_pythons = ['python2.6', 'python2.7', 'python3.2']
             
 missing_libs_re = re.compile(r"Tools and libraries NOT available at test time:\n"
                              r"\s*(.*?)\n")
 def get_missing_libraries(log):
     m = missing_libs_re.search(log)
     if m:
         return m.group(1)
 
 class TestRun(object):
     def __init__(self, pr_num, extra_args):
         self.unavailable_pythons = []
         self.venvs = []
         self.pr_num = pr_num
         self.extra_args = extra_args
         
         self.pr = gh_api.get_pull_request(gh_project, pr_num)
         
         self.setup()
         
         self.results = []
     
     def available_python_versions(self):
         """Get the executable names of available versions of Python on the system.
         """
         for py in supported_pythons:
             try:
                 check_call([py, '-c', 'import nose'], stdout=PIPE)
                 yield py
             except (OSError, CalledProcessError):
                 self.unavailable_pythons.append(py)
 
     def setup(self):
         """Prepare the repository and virtualenvs."""        
         try:
             os.mkdir(basedir)
         except OSError as e:
             if e.errno != errno.EEXIST:
                 raise
         os.chdir(basedir)
         
         # Delete virtualenvs and recreate
         for venv in glob('venv-*'):
             shutil.rmtree(venv)
         for py in self.available_python_versions():
             check_call(['virtualenv', '-p', py, '--system-site-packages', 'venv-%s' % py])
             self.venvs.append((py, 'venv-%s' % py))
         
         # Check out and update the repository
         if not os.path.exists('ipython'):
             try :
                 check_call(['git', 'clone', ipy_repository])
             except CalledProcessError :
                 check_call(['git', 'clone', ipy_http_repository])
         os.chdir(repodir)
         check_call(['git', 'checkout', 'master'])
         try :
             check_call(['git', 'pull', 'origin', 'master'])
         except CalledProcessError :
             check_call(['git', 'pull', ipy_http_repository, 'master'])
+        self.master_sha = check_output(['git', 'log', '-1', '--format=%h']).decode('ascii').strip()
         os.chdir(basedir)
     
     def get_branch(self):
         repo = self.pr['head']['repo']['clone_url']
         branch = self.pr['head']['ref']
         owner = self.pr['head']['repo']['owner']['login']
         mergeable = self.pr['mergeable']
         
         os.chdir(repodir)
         if mergeable:
             merged_branch = "%s-%s" % (owner, branch)
             # Delete the branch first
             call(['git', 'branch', '-D', merged_branch])
             check_call(['git', 'checkout', '-b', merged_branch])
             check_call(['git', 'pull', '--no-ff', '--no-commit', repo, branch])
             check_call(['git', 'commit', '-m', "merge %s/%s" % (repo, branch)])
         else:
             # Fetch the branch without merging it.
             check_call(['git', 'fetch', repo, branch])
             check_call(['git', 'checkout', 'FETCH_HEAD'])
         os.chdir(basedir)
     
     def markdown_format(self):
         def format_result(result):
             s = "* %s: " % result.py
             if result.passed:
                 s += "OK"
             else:
                 s += "Failed, log at %s" % result.log_url
             if result.missing_libraries:
                 s += " (libraries not available: " + result.missing_libraries + ")"
             return s
         
         if self.pr['mergeable']:
-            com = self.pr['head']['sha'][:7] + " merged into master"
+            com = self.pr['head']['sha'][:7] + " merged into master (%s)" % self.master_sha
         else:
             com = self.pr['head']['sha'][:7] + " (can't merge cleanly)"
         lines = ["**Test results for commit %s**" % com,
                  "Platform: " + sys.platform,
                  ""] + \
                 [format_result(r) for r in self.results] + \
                 [""]
         if self.extra_args:
             lines.append("Extra args: %r" % self.extra_args),
         lines.append("Not available for testing: " + ", ".join(self.unavailable_pythons))
         return "\n".join(lines)
     
     def post_results_comment(self):
         body = self.markdown_format()
         gh_api.post_issue_comment(gh_project, self.pr_num, body)
     
     def print_results(self):
         pr = self.pr
         
         print("\n")
+        msg = "**Test results for commit %s" % pr['head']['sha'][:7]
         if pr['mergeable']:
-            print("**Test results for commit %s merged into master**" % pr['head']['sha'][:7])
+            msg += " merged into master (%s)**" % self.master_sha
         else:
-            print("**Test results for commit %s (can't merge cleanly)**" % pr['head']['sha'][:7])
+            msg += " (can't merge cleanly)**"
+        print(msg)
         print("Platform:", sys.platform)
         for result in self.results:
             if result.passed:
                 print(result.py, ":", "OK")
             else:
                 print(result.py, ":", "Failed")
                 print("    Test log:", result.get('log_url') or result.log_file)
             if result.missing_libraries:
                 print("    Libraries not available:", result.missing_libraries)
         
         if self.extra_args:
             print("Extra args:", self.extra_args)
         print("Not available for testing:", ", ".join(self.unavailable_pythons))
 
     def dump_results(self):
         with open(os.path.join(basedir, 'lastresults.pkl'), 'wb') as f:
             pickle.dump(self, f)
 
     @staticmethod
     def load_results():
         with open(os.path.join(basedir, 'lastresults.pkl'), 'rb') as f:
             return pickle.load(f)
 
     def save_logs(self):
         for result in self.results:
             if not result.passed:
                 result_locn = os.path.abspath(os.path.join('venv-%s' % result.py,
                                             self.pr['head']['sha'][:7]+".log"))
                 with io.open(result_locn, 'w', encoding='utf-8') as f:
                     f.write(result.log)
             
                 result.log_file = result_locn
 
     def post_logs(self):
         for result in self.results:
             if not result.passed:
                 result.log_url = gh_api.post_gist(result.log,
                                                 description='IPython test log',
                                                 filename="results.log", auth=True)
     
     def run(self):
         for py, venv in self.venvs:
             tic = time.time()
             passed, log = run_tests(venv, self.extra_args)
             elapsed = int(time.time() - tic)
             print("Ran tests with %s in %is" % (py, elapsed))
             missing_libraries = get_missing_libraries(log)
             
             self.results.append(Obj(py=py,
                                    passed=passed,
                                    log=log,
                                    missing_libraries=missing_libraries
                                   )
                                )
 
 
 def run_tests(venv, extra_args):
     py = os.path.join(basedir, venv, 'bin', 'python')
     print(py)
     os.chdir(repodir)
     # cleanup build-dir
     if os.path.exists('build'):
         shutil.rmtree('build')
     tic = time.time()
     print ("\nInstalling IPython with %s" % py)
     logfile = os.path.join(basedir, venv, 'install.log')
     print ("Install log at %s" % logfile)
     with open(logfile, 'wb') as f:
         check_call([py, 'setup.py', 'install'], stdout=f)
     toc = time.time()
     print ("Installed IPython in %.1fs" % (toc-tic))
     os.chdir(basedir)
     
     # Environment variables:
     orig_path = os.environ["PATH"]
     os.environ["PATH"] = os.path.join(basedir, venv, 'bin') + ':' + os.environ["PATH"]
     os.environ.pop("PYTHONPATH", None)
     
     # check that the right IPython is imported
     ipython_file = check_output([py, '-c', 'import IPython; print (IPython.__file__)'])
     ipython_file = ipython_file.strip().decode('utf-8')
     if not ipython_file.startswith(os.path.join(basedir, venv)):
         msg = "IPython does not appear to be in the venv: %s" % ipython_file
         msg += "\nDo you use setupegg.py develop?"
         print(msg, file=sys.stderr)
         return False, msg
     
     iptest = os.path.join(basedir, venv, 'bin', 'iptest')
     if not os.path.exists(iptest):
         iptest = os.path.join(basedir, venv, 'bin', 'iptest3')
         
     print("\nRunning tests, this typically takes a few minutes...")
     try:
         return True, check_output([iptest] + extra_args, stderr=STDOUT).decode('utf-8')
     except CalledProcessError as e:
         return False, e.output.decode('utf-8')
     finally:
         # Restore $PATH
         os.environ["PATH"] = orig_path
 
 
 def test_pr(num, post_results=True, extra_args=None):
     # Get Github authorisation first, so that the user is prompted straight away
     # if their login is needed.
     if post_results:
         gh_api.get_auth_token()
     
     testrun = TestRun(num, extra_args or [])
     
     testrun.get_branch()
     
     testrun.run()
 
     testrun.dump_results()
     
     testrun.save_logs()
     testrun.print_results()
     
     if post_results:
         testrun.post_logs()
         testrun.post_results_comment()
         print("(Posted to Github)")
     else:
         post_script = os.path.join(os.path.dirname(sys.argv[0]), "post_pr_test.py")
         print("To post the results to Github, run", post_script)
     
 
 if __name__ == '__main__':
     import argparse
     parser = argparse.ArgumentParser(description="Test an IPython pull request")
     parser.add_argument('-p', '--publish', action='store_true',
                         help="Publish the results to Github")
     parser.add_argument('number', type=int, help="The pull request number")
     
     args, extra_args = parser.parse_known_args()
     test_pr(args.number, post_results=args.publish, extra_args=extra_args)