[ci] add script to get info on prior pipeline

.gitlab-ci/getpipelineinfo.py

+import json
+import sys
+import os
+from argparse import ArgumentParser
+
+try:
+    path = os.path.split(os.path.abspath(__file__))[0]
+    sys.path.append(os.path.join(path, '../bin/util'))
+    from common import runCommand
+except Exception:
+    sys.exit('Could not import common module')
+
+
+def findPipeline(pipelineFile, predicate):
+    with open(pipelineFile) as pipeLines:
+        for pipeLine in json.load(pipeLines):
+            if predicate(pipeLine):
+                return pipeLine
+    return None
+
+
+parser = ArgumentParser(
+    description='Find and print information on a previously run pipeline'
+)
+
+parser.add_argument('-s', '--status',
+                    required=False, default='success',
+                    help='Define the status of the pipeline to be found')
+parser.add_argument('-p', '--print-format',
+                    required=True, choices=['pipeline-id', 'commit-sha'],
+                    help='Switch between reporting the pipeline-id/commit-sha')
+parser.add_argument('-l', '--look-for',
+                    required=True, choices=['latest', 'HEAD'],
+                    help='Define how to search for pipelines')
+parser.add_argument('-f', '--status-file',
+                    required=True,
+                    help='The .json file with the latest pipeline statuses')
+args = vars(parser.parse_args())
+
+currentBranch = runCommand('git branch --show-current').strip('\n')
+currentCommitInfo = runCommand('git show HEAD').split('\n')
+headIsMergeCommit = 'Merge:' in currentCommitInfo[1]
+
+headSHA = runCommand('git rev-list HEAD --max-count=1').strip('\n')
+if headIsMergeCommit:
+    preSHA = runCommand('git rev-list HEAD --max-count=2').split('\n')[1]
+    mrSha = currentCommitInfo[1].split()[2]
+
+
+def checkCommitSHA(pipeLine):
+    sha = pipeLine['sha']
+    if headIsMergeCommit:
+        return sha == headSHA or sha == preSHA or mrSha in sha
+    return sha == headSHA
+
+
+def checkStatus(pipeLine): return pipeLine['status'] == args['status']
+def checkBranch(pipeLine): return pipeLine['ref'] == currentBranch
+def find(predicate): return findPipeline(args['status_file'], predicate)
+
+
+if args['look_for'] == 'HEAD':
+    pipeLine = find(lambda p: checkStatus(p) and checkCommitSHA(p))
+elif args['look_for'] == 'latest':
+    pipeLine = find(lambda p: checkStatus(p) and checkBranch(p))
+
+if pipeLine is not None:
+    if args['print_format'] == 'pipeline-id':
+        print(pipeLine['id'])
+    elif args['print_format'] == 'commit-sha':
+        print(pipeLine['sha'])
+else:
+    sys.exit('Could not find a succesful pipeline')