nixpkgs/pkgs/build-support/setup-hooks/set-java-classpath.sh

# This setup hook adds every JAR in the share/java subdirectories of
# the build inputs to $CLASSPATH.

export CLASSPATH

addPkgToClassPath () {
    local jar
    for jar in $1/share/java/*.jar; do
        export CLASSPATH=''${CLASSPATH}''${CLASSPATH:+:}''${jar}
    done
}

envHooks+=(addPkgToClassPath)
Add a setup hook that automatically sets up $CLASSPATH All JARs in $pkg/share/java (for each $pkg in the build inputs) are added to $CLASSPATH. Thus, you can say buildInputs = [ setJavaClassPath someJavaDependency ]; and the JARs in someJavaDependency will be found automatically by tools like javac or ant. Note that the manual used to say that JARs should be installed in lib/java; this is now share/java, following the Debian policy: http://www.debian.org/doc/packaging-manuals/java-policy/x110.html The directory share/java makes more sense because JARs are architecture-independent. (Also, a quick grep shows that we were not exactly consistent about this in Nixpkgs.) 2014-01-06 12:42:37 +00:00			`# This setup hook adds every JAR in the share/java subdirectories of`
			`# the build inputs to $CLASSPATH.`

			`export CLASSPATH`

			`addPkgToClassPath () {`
			`local jar`
			`for jar in $1/share/java/*.jar; do`
			`export CLASSPATH=''${CLASSPATH}''${CLASSPATH:+:}''${jar}`
			`done`
			`}`

Cleanup: Use += to append to envHooks 2014-07-08 12:20:05 +00:00			`envHooks+=(addPkgToClassPath)`