RFR: 8201274: Launch Single-File Source-Code Programs

[Jaikiran Pai]

Just gave the patch a try by locally building it. Works great! :)

A minor comment- the java usage/help text shows this:

Usage: java [options] <mainclass> [args...]
            (to execute a class)
    or  java [options] -jar <jarfile> [args...]
            (to execute a jar file)
    or  java [options] -m <module>[/<mainclass>] [args...]
        java [options] --module <module>[/<mainclass>] [args...]
            (to execute the main class in a module)
    or  java [options] java source-file [args]

Do you think that last line could instead be:

    or  java [options] <source-file> [args]

         (to launch a single-file source-codeprogram)

to be consistent with the rest of the usage text?

-Jaikiran


On 05/05/18 3:29 AM, Jonathan Gibbons wrote:
> Here's an update to the previously proposed patch for JEP 330: Launch 
> Single-File Source-Code Programs.
> It includes all review feedback so far. The changes are mostly minor, 
> but with the addition of more test cases.
>
> The webrev includes a delta-webrev for those that just want to see 
> what has changed since last time.
>
> Full webrev: http://cr.openjdk.java.net/~jjg/8201274/webrev.mq/index.html
>
>     Original webrev: 
> http://cr.openjdk.java.net/~jjg/8201274/webrev.mq/webrev.v1/index.html
>     Delta webrev: 
> http://cr.openjdk.java.net/~jjg/8201274/webrev.mq/webrev.v2/index.html
>
> Note that the work is temporarily blocked by JDK-8202387: javac 
> --release 11 not supported.
> A fix for that is underway and in review: 
> http://mail.openjdk.java.net/pipermail/compiler-dev/2018-May/011868.html
> This work has been tested using a workaround for this issue, and will 
> be tested again when the real fix is in place.
>
> -- Jon
>
> On 04/12/2018 01:15 PM, Jonathan Gibbons wrote:
>> Please review an initial implementation for the feature described in
>> JEP 330: Launch Single-File Source-Code Programs.
>>
>> The work is described in the JEP and CSR, and falls into various parts:
>>
>>   * The part to handle the new command-line options is in the native
>>     Java launcher code.
>>   * The part to invoke the compiler and subsequently execute the code
>>     found in the source file is in a new class in the jdk.compiler 
>> module.
>>   * There are some minor Makefile changes, to add support for a new
>>     resource file.
>>
>> There are no changes to javac itself.
>>
>> JEP: http://openjdk.java.net/jeps/330
>> JBS: https://bugs.openjdk.java.net/browse/JDK-8201274
>> CSR: https://bugs.openjdk.java.net/browse/JDK-8201275
>> Webrev: http://cr.openjdk.java.net/~jjg/8201274/webrev.00/
>>
>> -- Jon
>