how to build on Windows (troubles with Cygwin)

[VladimirAlexiev]

$  uname
CYGWIN_NT-10.0-22631

I tried the instructions https://atextor.de/owl-cli/main/snapshot/index.html#building-from-source and have these troubles:

SDKMAN

$ sdk install java 17.0.8-graal

Stop! java 17.0.8-graal is not available. Possible causes:
 * 17.0.8-graal is an invalid version
 * java binaries are incompatible with your platform
 * java has not been released yet

Tip: see all available versions for your platform:

  $ sdk list java

I did that and got:

================================================================================
Available Java Versions for Exotic
================================================================================
 Vendor        | Use | Version      | Dist    | Status     | Identifier
--------------------------------------------------------------------------------
No versions available for your platform at this time.
================================================================================

• So I deleted SDKMAN
• Downloaded https://download.oracle.com/graalvm/17/latest/graalvm-jdk-17_windows-x64_bin.zip (17.0.11) and unzipped it to d:\graalvm

Line endings

$ ./gradlew
./gradlew: line 2: $'\r': command not found
./gradlew: line 18: $'\r': command not found
./gradlew: line 64: $'\r': command not found
./gradlew: line 66: $'\r': command not found
./gradlew: line 69: $'\r': command not found
./gradlew: line 71: $'while\r': command not found
./gradlew: line 73: [: missing `]'
./gradlew: line 74: $'do\r': command not found
ls: cannot access './gradlew'$'\r': No such file or directory
./gradlew: line 79: syntax error near unexpected token `newline'
'/gradlew: line 79: `      *)    app_path=$APP_HOME$link ;;

This is an EOL (line endings) compatibility issue.
git converts the files to \r\n on checkout.
I often use d2u to fix such issues.

The suggested fix is:

$ git config --global -e
# edit [core] section and set autocrlf=input
# then verify with:
$ git config --get core.autocrlf
input

gradlew.bat

I decided to try the build from cmd rather than bash:

set JAVA_HOME=d:\graalvm
gradlew.bat

It gave some warnings about deprecated features, but was successful.
The complete build scan is at https://scans.gradle.com/s/nmmtoraixpzcu

running owl-cli

> java -jar cli\build\libs\owl-cli-snapshot.jar --version
owl-cli version: snapshot build date: 2024-09-17 19:15:41

> move /y cli\build\libs\owl-cli-snapshot.jar c:\prog\bin

I currently use Temurin 22 (installed with scoop), but owl-cli seems to run ok.

java -version
openjdk version "22" 2024-03-19
OpenJDK Runtime Environment Temurin-22+36 (build 22+36)
OpenJDK 64-Bit Server VM Temurin-22+36 (build 22+36, mixed mode, sharing)

I think it needs graalvm-17 only for the build process, because it fails to run with it:

>set JAVA_HOME=d:\graalvm

>d:\graalvm\bin\java -version
java version "17.0.12" 2024-07-16 LTS
Java(TM) SE Runtime Environment Oracle GraalVM 17.0.12+8.1 (build 17.0.12+8-LTS-jvmci-23.0-b41)
Java HotSpot(TM) 64-Bit Server VM Oracle GraalVM 17.0.12+8.1 (build 17.0.12+8-LTS-jvmci-23.0-b41, mixed mode, sharing)

>d:\graalvm\bin\java c:\prog\bin\owl-cli-snapshot.jar -version
Error: Could not find or load main class c:\prog\bin\owl-cli-snapshot.jar
Caused by: java.lang.ClassNotFoundException: c:\prog\bin\owl-cli-snapshot.jar

[atextor]

Hi @VladimirAlexiev, thanks for the effort & the infos. I've never tried the build with Cygwin, I just now that some people use SDKMAN! with WSL. You are correct, a GraalVM JDK is only required for the build if a native executable (.exe) should be built, which, for regular builds is the default - the native executable should ease use after all.

Related:

• owl.exe does nothing #15
• make frequent binary releases #21