How to create jigsaw module in SBT?
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I would like to use jlink for creating self-contained application packages for all platforms (darwin, linux, windows) from Scala source code. It seems that jlink only works with new (relatively) jigsaw modules - so I need to package my code as a module. In Java world it seems to be easily achieved by placing special module-info.java file to the package that will become a module.
I tried to follow intuition and just placed this module-info.java into src/main/java/my.package.name/module-info.java. Though this doesn't work. It seems that scalac is trying to read module-info.java as usual Java file (which is not the case), hence the error
module-info.java:1:8: illegal start of type declaration
[error] module my.package.name {
[error] ^
What do I need to do to package my Scala code as a module?
Open JDK: 11
Scala: 2.12.4
SBT: 1.1.6
java scala sbt java-11 module-info
edited Nov 20 at 2:02
nullpointer
38.4k1073146
asked Nov 19 at 22:07
vladimir
84521124
add a comment |
up vote
3
down vote
favorite
I would like to use jlink for creating self-contained application packages for all platforms (darwin, linux, windows) from Scala source code. It seems that jlink only works with new (relatively) jigsaw modules - so I need to package my code as a module. In Java world it seems to be easily achieved by placing special module-info.java file to the package that will become a module.
I tried to follow intuition and just placed this module-info.java into src/main/java/my.package.name/module-info.java. Though this doesn't work. It seems that scalac is trying to read module-info.java as usual Java file (which is not the case), hence the error
module-info.java:1:8: illegal start of type declaration
[error] module my.package.name {
[error] ^
What do I need to do to package my Scala code as a module?
Open JDK: 11
Scala: 2.12.4
SBT: 1.1.6
java scala sbt java-11 module-info
edited Nov 20 at 2:02
nullpointer
38.4k1073146
asked Nov 19 at 22:07
vladimir
84521124
1
If scalac doesn't know anything about modules then you might have to compile the module-info.java separately, with javac -d specifying the output directory where the scalac compiler has emitted the class files for the contents of the module.
– Alan Bateman
Nov 20 at 8:46
add a comment |
up vote
3
down vote
favorite
up vote
3
down vote
favorite
I would like to use jlink for creating self-contained application packages for all platforms (darwin, linux, windows) from Scala source code. It seems that jlink only works with new (relatively) jigsaw modules - so I need to package my code as a module. In Java world it seems to be easily achieved by placing special module-info.java file to the package that will become a module.
I tried to follow intuition and just placed this module-info.java into src/main/java/my.package.name/module-info.java. Though this doesn't work. It seems that scalac is trying to read module-info.java as usual Java file (which is not the case), hence the error
module-info.java:1:8: illegal start of type declaration
[error] module my.package.name {
[error] ^
What do I need to do to package my Scala code as a module?
Open JDK: 11
Scala: 2.12.4
SBT: 1.1.6
java scala sbt java-11 module-info
edited Nov 20 at 2:02
nullpointer
38.4k1073146
asked Nov 19 at 22:07
vladimir
84521124
I would like to use jlink for creating self-contained application packages for all platforms (darwin, linux, windows) from Scala source code. It seems that jlink only works with new (relatively) jigsaw modules - so I need to package my code as a module. In Java world it seems to be easily achieved by placing special module-info.java file to the package that will become a module.
I tried to follow intuition and just placed this module-info.java into src/main/java/my.package.name/module-info.java. Though this doesn't work. It seems that scalac is trying to read module-info.java as usual Java file (which is not the case), hence the error
module-info.java:1:8: illegal start of type declaration
[error] module my.package.name {
[error] ^
What do I need to do to package my Scala code as a module?
Open JDK: 11
Scala: 2.12.4
SBT: 1.1.6
java scala sbt java-11 module-info
java scala sbt java-11 module-info
edited Nov 20 at 2:02
nullpointer
38.4k1073146
asked Nov 19 at 22:07
vladimir
84521124
edited Nov 20 at 2:02
nullpointer
38.4k1073146
asked Nov 19 at 22:07
vladimir
84521124
edited Nov 20 at 2:02
nullpointer
38.4k1073146
edited Nov 20 at 2:02
nullpointer
38.4k1073146
edited Nov 20 at 2:02
nullpointer
38.4k1073146
38.4k1073146
asked Nov 19 at 22:07
vladimir
84521124
asked Nov 19 at 22:07
vladimir
84521124
asked Nov 19 at 22:07
vladimir
84521124
84521124
1
If scalac doesn't know anything about modules then you might have to compile the module-info.java separately, with javac -d specifying the output directory where the scalac compiler has emitted the class files for the contents of the module.
– Alan Bateman
Nov 20 at 8:46
add a comment |
1
If scalac doesn't know anything about modules then you might have to compile the module-info.java separately, with javac -d specifying the output directory where the scalac compiler has emitted the class files for the contents of the module.
– Alan Bateman
Nov 20 at 8:46
1
1
If scalac doesn't know anything about modules then you might have to compile the module-info.java separately, with javac -d specifying the output directory where the scalac compiler has emitted the class files for the contents of the module.
– Alan Bateman
Nov 20 at 8:46
If scalac doesn't know anything about modules then you might have to compile the module-info.java separately, with javac -d specifying the output directory where the scalac compiler has emitted the class files for the contents of the module.
– Alan Bateman
Nov 20 at 8:46
add a comment |
1 Answer
1
active
oldest
votes
up vote
2
down vote
In general seems like that scala doesn't completely support Java9+, at least their compatibility notes read so.
As of Scala 2.12.6 and 2.11.12, JDK 9+ support is incomplete. Notably,
scalac will not enforce the restrictions of the Java Platform Module
System, which means that code that typechecks may incur linkage errors
at runtime. Scala 2.13.x will provide rudimentary support for this,
but likely only in nightlies built on Java 11.
You can follow Support features of JDK 9+ and Java 11 testing for further updates.
answered Nov 20 at 2:00
nullpointer
38.4k1073146
add a comment |
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
In general seems like that scala doesn't completely support Java9+, at least their compatibility notes read so.
As of Scala 2.12.6 and 2.11.12, JDK 9+ support is incomplete. Notably,
scalac will not enforce the restrictions of the Java Platform Module
System, which means that code that typechecks may incur linkage errors
at runtime. Scala 2.13.x will provide rudimentary support for this,
but likely only in nightlies built on Java 11.
You can follow Support features of JDK 9+ and Java 11 testing for further updates.
answered Nov 20 at 2:00
nullpointer
38.4k1073146
add a comment |
up vote
2
down vote
In general seems like that scala doesn't completely support Java9+, at least their compatibility notes read so.
As of Scala 2.12.6 and 2.11.12, JDK 9+ support is incomplete. Notably,
scalac will not enforce the restrictions of the Java Platform Module
System, which means that code that typechecks may incur linkage errors
at runtime. Scala 2.13.x will provide rudimentary support for this,
but likely only in nightlies built on Java 11.
You can follow Support features of JDK 9+ and Java 11 testing for further updates.
answered Nov 20 at 2:00
nullpointer
38.4k1073146
add a comment |
up vote
2
down vote
up vote
2
down vote
In general seems like that scala doesn't completely support Java9+, at least their compatibility notes read so.
As of Scala 2.12.6 and 2.11.12, JDK 9+ support is incomplete. Notably,
scalac will not enforce the restrictions of the Java Platform Module
System, which means that code that typechecks may incur linkage errors
at runtime. Scala 2.13.x will provide rudimentary support for this,
but likely only in nightlies built on Java 11.
You can follow Support features of JDK 9+ and Java 11 testing for further updates.
answered Nov 20 at 2:00
nullpointer
38.4k1073146
In general seems like that scala doesn't completely support Java9+, at least their compatibility notes read so.
As of Scala 2.12.6 and 2.11.12, JDK 9+ support is incomplete. Notably,
scalac will not enforce the restrictions of the Java Platform Module
System, which means that code that typechecks may incur linkage errors
at runtime. Scala 2.13.x will provide rudimentary support for this,
but likely only in nightlies built on Java 11.
You can follow Support features of JDK 9+ and Java 11 testing for further updates.
answered Nov 20 at 2:00
nullpointer
38.4k1073146
answered Nov 20 at 2:00
nullpointer
38.4k1073146
answered Nov 20 at 2:00
nullpointer
38.4k1073146
answered Nov 20 at 2:00
nullpointer
38.4k1073146
38.4k1073146
add a comment |
add a comment |
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If scalac doesn't know anything about modules then you might have to compile the module-info.java separately, with javac -d specifying the output directory where the scalac compiler has emitted the class files for the contents of the module.
– Alan Bateman
Nov 20 at 8:46