ktlint prints an error when running with JAVA_TOOL_OPTIONS

[rawilder]

Expected Behavior

running ktlint with JAVA_TOOL_OPTIONS set should not produce an error

Observed Behavior

running ktlint with JAVA_TOOL_OPTIONS produces the following error

/usr/local/Cellar/ktlint/0.46.1/libexec/ktlint: line 5: [: Picked up JAVA_TOOL_OPTIONS: integer expression expected

Steps to Reproduce

download ktlint
export some JAVA_TOOL_OPTIONS
run ktlint

Your Environment

• Version of ktlint used: 0.46.1
• Relevant parts of the .editorconfig settings: n/a
• Name and version (or code for custom task) of integration used (Gradle plugin, Maven plugin, command line, custom Gradle task): n/a
• Version of Gradle used (if applicable): n/a
• Operating System and version: macos 12.3
• i have JAVA_TOOL_OPTIONS set

Investigation

This seems to be happening from these two lines in the ktlint start

# incorrectly retrieves version
JV=$(java -version 2>&1 | head -1 | cut -d'"' -f2 | sed '/^1\./s///' | cut -d'.' -f1)
echo $JV
# echoes 'Picked up JAVA_TOOL_OPTIONS:'
X=$( [ "$JV" -ge "16" ] && echo "--add-opens java.base/java.lang=ALL-UNNAMED" || echo "")
# this command fails because the version is not correctly parsed

Ktlint still runs okay, it just spits some errors in the beginning. This could be solved with a different way to get the java version. Perhaps something with sed or awk to search for the 'version' string instead of head.

[rawilder]

#1544