MINOR: release.py: fix some compatibility problems.

Rather than using sed, use built-in Python regular expressions to strip
the SNAPSHOT expression from the pom.xml files.  Sed has different flags
on different platforms, such as Linux.  Using Python directly here is
more compatible, as well as being more efficient, and not requiring an
rm command afterwards.

When running release_notes.py, use the current Python interpreter.
This is needed to prevent attempting to run release_notes.py with
Python 3 on some systems.  release_notes.py will not (yet) work with
Python 3.

Author: Colin P. Mccabe <cmccabe@confluent.io>

Reviewers: Magnus Edenhill <magnus@edenhill.se>, David Arthur <mumrah@gmail.com>, Manikumar Reddy <manikumar.reddy@gmail.com>

Closes #6198 from cmccabe/release_py

release.py

@@ -141,6 +141,16 @@ def replace(path, pattern, replacement):
         for line in updated:
             f.write(line)
 
+def regexReplace(path, pattern, replacement):
+    updated = []
+    with open(path, 'r') as f:
+        for line in f:
+            updated.append(re.sub(pattern, replacement, line))
+
+    with open(path, 'w') as f:
+        for line in updated:
+            f.write(line)
+
 def user_ok(msg):
     ok = raw_input(msg)
     return ok.lower() == 'y'
@@ -522,12 +532,17 @@ cmd("Checking out current development branch", "git checkout -b %s %s" % (releas
 print("Updating version numbers")
 replace("gradle.properties", "version", "version=%s" % release_version)
 replace("tests/kafkatest/__init__.py", "__version__", "__version__ = '%s'" % release_version)
-cmd("update streams quickstart pom", ["sed", "-i", ".orig"," s/-SNAPSHOT//", "streams/quickstart/pom.xml"])
-cmd("update streams quickstart java pom", ["sed", "-i", ".orig", "s/-SNAPSHOT//", "streams/quickstart/java/pom.xml"])
-cmd("update streams quickstart java pom", ["sed", "-i", ".orig", "s/-SNAPSHOT//", "streams/quickstart/java/src/main/resources/archetype-resources/pom.xml"])
-cmd("remove backup pom.xml", "rm streams/quickstart/pom.xml.orig")
-cmd("remove backup java pom.xml", "rm streams/quickstart/java/pom.xml.orig")
-cmd("remove backup java pom.xml", "rm streams/quickstart/java/src/main/resources/archetype-resources/pom.xml.orig")
+print("updating streams quickstart pom")
+regexReplace("streams/quickstart/pom.xml", "-SNAPSHOT", "")
+print("updating streams quickstart java pom")
+regexReplace("streams/quickstart/java/pom.xml", "-SNAPSHOT", "")
+print("updating streams quickstart archetype pom")
+regexReplace("streams/quickstart/java/src/main/resources/archetype-resources/pom.xml", "-SNAPSHOT", "")
+print("updating ducktape version.py")
+regexReplace("./tests/kafkatest/version.py", "^DEV_VERSION =.*",
+    "DEV_VERSION = KafkaVersion(\"%s-SNAPSHOT\")" % release_version)
+print("updating ducktape __init__.py")
+regexReplace("./tests/kafkatest/__init__.py", ".dev.*", "")
 # Command in explicit list due to messages with spaces
 cmd("Committing version number updates", ["git", "commit", "-a", "-m", "Bump version to %s" % release_version])
 # Command in explicit list due to messages with spaces
@@ -555,7 +570,7 @@ cmd("Verifying the correct year in NOTICE", "grep %s NOTICE" % current_year, cwd
 with open(os.path.join(artifacts_dir, "RELEASE_NOTES.html"), 'w') as f:
     print("Generating release notes")
     try:
-        subprocess.check_call(["./release_notes.py", release_version], stdout=f)
+        subprocess.check_call([sys.executable, "./release_notes.py", release_version], stdout=f)
     except subprocess.CalledProcessError as e:
         print_output(e.output)