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Improve Java version regexes in Audio (#4604)

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* Improve Java version regexes in Audio

* Can I fix this very small thing too :P
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jack1142 2020-11-16 07:04:45 +01:00 committed by GitHub
parent 0a040ad8e3
commit 0f7a3bf6f8
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1 changed files with 51 additions and 17 deletions
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68
redbot/cogs/audio/manager.py
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@ -36,12 +36,48 @@ BUNDLED_APP_YML: Final[pathlib.Path] = pathlib.Path(__file__).parent / "data" /
LAVALINK_APP_YML: Final[pathlib.Path] = LAVALINK_DOWNLOAD_DIR / "application.yml"
_RE_READY_LINE: Final[Pattern] = re.compile(rb"Started Launcher in \S+ seconds")
_FAILED_TO_START: Final[Pattern] = re.compile(rb"Web server failed to start. (.*)")
_FAILED_TO_START: Final[Pattern] = re.compile(rb"Web server failed to start\. (.*)")
_RE_BUILD_LINE: Final[Pattern] = re.compile(rb"Build:\s+(?P<build>\d+)")
_RE_JAVA_VERSION_LINE: Final[Pattern] = re.compile(
r'version "(?P<major>\d+).(?P<minor>\d+).\d+(?:_\d+)?(?:-[A-Za-z0-9]+)?"'
# Version regexes
#
# We expect the output to look something like:
# $ java -version
# ...
# ... version "VERSION STRING HERE" ...
# ...
#
# There are two version formats that we might get here:
#
# - Version scheme pre JEP 223 - used by Java 8 and older
#
# examples:
# 1.8.0
# 1.8.0_275
# 1.8.0_272-b10
# 1.8.0_202-internal-201903130451-b08
# 1.8.0_272-ea-202010231715-b10
# 1.8.0_272-ea-b10
#
# Implementation based on J2SE SDK/JRE Version String Naming Convention document:
# https://www.oracle.com/java/technologies/javase/versioning-naming.html
_RE_JAVA_VERSION_LINE_PRE223: Final[Pattern] = re.compile(
r'version "1\.(?P<major>[0-8])\.(?P<minor>0)(?:_(?:\d+))?(?:-.*)?"'
)
# - Version scheme introduced by JEP 223 - used by Java 9 and newer
#
# examples:
# 11
# 11.0.9
# 11.0.9.1
# 11.0.9-ea
# 11.0.9-202011050024
#
# Implementation based on JEP 223 document:
# https://openjdk.java.net/jeps/223
_RE_JAVA_VERSION_LINE_223: Final[Pattern] = re.compile(
r'version "(?P<major>\d+)(?:\.(?P<minor>\d+))?(?:\.\d+)*(\-[a-zA-Z0-9]+)?"'
)
_RE_JAVA_SHORT_VERSION: Final[Pattern] = re.compile(r'version "(?P<major>\d+)"')
LAVALINK_BRANCH_LINE: Final[Pattern] = re.compile(rb"Branch\s+(?P<branch>[\w\-\d_.]+)")
LAVALINK_JAVA_LINE: Final[Pattern] = re.compile(rb"JVM:\s+(?P<jvm>\d+[.\d+]*)")
@ -175,21 +211,19 @@ class ServerManager:
_, err = await _proc.communicate()
version_info: str = err.decode("utf-8")
# We expect the output to look something like:
# $ java -version
# ...
# ... version "MAJOR.MINOR.PATCH[_BUILD]" ...
# ...
# We only care about the major and minor parts though.
lines = version_info.splitlines()
for line in lines:
match = _RE_JAVA_VERSION_LINE.search(line)
short_match = _RE_JAVA_SHORT_VERSION.search(line)
if match:
return int(match["major"]), int(match["minor"])
elif short_match:
return int(short_match["major"]), 0
match = _RE_JAVA_VERSION_LINE_PRE223.search(line)
if match is None:
match = _RE_JAVA_VERSION_LINE_223.search(line)
if match is None:
continue
major = int(match["major"])
minor = 0
if minor_str := match["minor"]:
minor = int(minor_str)
return major, minor
raise RuntimeError(f"The output of `{self._java_exc} -version` was unexpected.")