More beginner-friendly output at "No such file or directory"

[koppor]

JBang should be more n00b friendly.

A JabRef newcomer posts: My gradle build does not work.

[jbang] Building jar for JournalListMvGenerator.java ...
[jbang] [ERROR] Cannot run program "/usr/lib/jvm/java-25-openjdk-amd64/bin/javac": Exec failed, error: 2 (No such file or directory)
[jbang] Run with -- verbose or -x for more details. The -- verbose or -x must be placed before the jbang command. I.e. jbang -- verbose run 

Now, JBang is called jbang-gradle-plugin.

Thus, it is not possible to run --verbose directly.

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Screenshot:

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The output should be a bit more user friendly.

Maybe, it is an issue of the gradle-jbang plugin not using JAVA_HOME of gradle's toolchain correctly, IDK.

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atul@atul:~/Desktop/open-source/jabref$ /home/atul/.gradle/caches/jbang/jbang-0.137.0/bin/jbang --verbose /home/atul/Desktop/open-source/jabref/build-support/src/main/java/JournalListMvGenerator.java 
[jbang] [0:865] jbang version 0.137.0
[jbang] [0:918] No JDK providers specified, using default providers
[jbang] [2026-03-06 23:32:33] Using JDK provider(s): CurrentJdkProvider, DefaultJdkProvider, JavaHomeJdkProvider, PathJdkProvider, LinkedJdkProvider, JBangJdkProvider
[jbang] [1:019] Resolving resource ref: /home/atul/Desktop/open-source/jabref/build-support/src/main/java/JournalListMvGenerator.java
[jbang] [1:040] Resolved resource ref as: /home/atul/Desktop/open-source/jabref/build-support/src/main/java/JournalListMvGenerator.java
[jbang] [1:278] Build required as /home/atul/.jbang/cache/jars/JournalListMvGenerator.java.bff0c10f23fd06d29194d79b8715c52fa23361933a4973583f068de1347c9b3c/JournalListMvGenerator.jar not readable or not found.
[jbang] [2026-03-06 23:32:34] Looking for JDK: 25
[jbang] [2026-03-06 23:32:34] Using JDK: 25 (25.0.2+10-Ubuntu-124.04 [dynamic], current, /usr/lib/jvm/java-25-openjdk-amd64, [Ga, Jdk]))
[jbang] [1:331] Resolving artifact(s): com.h2database:h2:2.4.240, info.debatty:java-string-similarity:2.0.0, org.antlr:antlr4-runtime:4.13.2, org.apache.commons:commons-csv:1.14.1, org.jooq:jool:0.9.15, org.jspecify:jspecify:1.0.0, org.openjfx:javafx-base:24.0.2, org.slf4j:slf4j-api:2.0.17, org.slf4j:slf4j-simple:2.0.17
[jbang] [1:339] Repositories: central=https://repo1.maven.org/maven2/
[jbang] [1:468] Resolved artifact(s) from cache: com.h2database:h2:jar:2.4.240=/home/atul/.m2/repository/com/h2database/h2/2.4.240/h2-2.4.240.jar, info.debatty:java-string-similarity:jar:2.0.0=/home/atul/.m2/repository/info/debatty/java-string-similarity/2.0.0/java-string-similarity-2.0.0.jar, net.jcip:jcip-annotations:jar:1.0=/home/atul/.m2/repository/net/jcip/jcip-annotations/1.0/jcip-annotations-1.0.jar, org.antlr:antlr4-runtime:jar:4.13.2=/home/atul/.m2/repository/org/antlr/antlr4-runtime/4.13.2/antlr4-runtime-4.13.2.jar, org.apache.commons:commons-csv:jar:1.14.1=/home/atul/.m2/repository/org/apache/commons/commons-csv/1.14.1/commons-csv-1.14.1.jar, commons-io:commons-io:jar:2.20.0=/home/atul/.m2/repository/commons-io/commons-io/2.20.0/commons-io-2.20.0.jar, commons-codec:commons-codec:jar:1.19.0=/home/atul/.m2/repository/commons-codec/commons-codec/1.19.0/commons-codec-1.19.0.jar, org.jooq:jool:jar:0.9.15=/home/atul/.m2/repository/org/jooq/jool/0.9.15/jool-0.9.15.jar, org.jspecify:jspecify:jar:1.0.0=/home/atul/.m2/repository/org/jspecify/jspecify/1.0.0/jspecify-1.0.0.jar, org.openjfx:javafx-base:jar:24.0.2=/home/atul/.m2/repository/org/openjfx/javafx-base/24.0.2/javafx-base-24.0.2.jar, org.openjfx:javafx-base:linux:jar:24.0.2=/home/atul/.m2/repository/org/openjfx/javafx-base/24.0.2/javafx-base-24.0.2-linux.jar, org.slf4j:slf4j-api:jar:2.0.17=/home/atul/.m2/repository/org/slf4j/slf4j-api/2.0.17/slf4j-api-2.0.17.jar, org.slf4j:slf4j-simple:jar:2.0.17=/home/atul/.m2/repository/org/slf4j/slf4j-simple/2.0.17/slf4j-simple-2.0.17.jar
[jbang] [1:593] Building jar for JournalListMvGenerator.java...
[jbang] [1:593] Compile: /usr/lib/jvm/java-25-openjdk-amd64/bin/javac -g -parameters -classpath /home/atul/.m2/repository/com/h2database/h2/2.4.240/h2-2.4.240.jar:/home/atul/.m2/repository/info/debatty/java-string-similarity/2.0.0/java-string-similarity-2.0.0.jar:/home/atul/.m2/repository/net/jcip/jcip-annotations/1.0/jcip-annotations-1.0.jar:/home/atul/.m2/repository/org/antlr/antlr4-runtime/4.13.2/antlr4-runtime-4.13.2.jar:/home/atul/.m2/repository/org/apache/commons/commons-csv/1.14.1/commons-csv-1.14.1.jar:/home/atul/.m2/repository/commons-io/commons-io/2.20.0/commons-io-2.20.0.jar:/home/atul/.m2/repository/commons-codec/commons-codec/1.19.0/commons-codec-1.19.0.jar:/home/atul/.m2/repository/org/jooq/jool/0.9.15/jool-0.9.15.jar:/home/atul/.m2/repository/org/jspecify/jspecify/1.0.0/jspecify-1.0.0.jar:/home/atul/.m2/repository/org/openjfx/javafx-base/24.0.2/javafx-base-24.0.2.jar:/home/atul/.m2/repository/org/openjfx/javafx-base/24.0.2/javafx-base-24.0.2-linux.jar:/home/atul/.m2/repository/org/slf4j/slf4j-api/2.0.17/slf4j-api-2.0.17.jar:/home/atul/.m2/repository/org/slf4j/slf4j-simple/2.0.17/slf4j-simple-2.0.17.jar -d /home/atul/.jbang/cache/jars/JournalListMvGenerator.java.bff0c10f23fd06d29194d79b8715c52fa23361933a4973583f068de1347c9b3c/classes /home/atul/Desktop/open-source/jabref/build-support/src/main/java/JournalListMvGenerator.java /home/atul/Desktop/open-source/jabref/jablib/src/main/java/org/jabref/logic/journals/Abbreviation.java /home/atul/Desktop/open-source/jabref/jablib/src/main/java/org/jabref/logic/journals/AbbreviationFormat.java /home/atul/Desktop/open-source/jabref/jablib/src/main/java/org/jabref/logic/journals/AbbreviationParser.java /home/atul/Desktop/open-source/jabref/jablib/src/main/java/org/jabref/logic/journals/JournalAbbreviationLoader.java /home/atul/Desktop/open-source/jabref/jablib/src/main/java/org/jabref/logic/journals/JournalAbbreviationPreferences.java /home/atul/Desktop/open-source/jabref/jablib/src/main/java/org/jabref/logic/journals/JournalAbbreviationRepository.java /home/atul/Desktop/open-source/jabref/jablib/src/main/java/org/jabref/logic/journals/ltwa/LtwaEntry.java /home/atul/Desktop/open-source/jabref/jablib/src/main/java/org/jabref/logic/journals/ltwa/LtwaRepository.java /home/atul/Desktop/open-source/jabref/jablib/src/main/java/org/jabref/logic/journals/ltwa/NormalizeUtils.java /home/atul/Desktop/open-source/jabref/jablib/src/main/java/org/jabref/logic/journals/ltwa/PrefixTree.java /home/atul/Desktop/open-source/jabref/jablib/src/main/java/org/jabref/logic/util/strings/StringSimilarity.java /home/atul/Desktop/open-source/jabref/jablib/build/generated-src/antlr/main/org/jabref/logic/journals/ltwa/LtwaBaseListener.java /home/atul/Desktop/open-source/jabref/jablib/build/generated-src/antlr/main/org/jabref/logic/journals/ltwa/LtwaLexer.java /home/atul/Desktop/open-source/jabref/jablib/build/generated-src/antlr/main/org/jabref/logic/journals/ltwa/LtwaVisitor.java /home/atul/Desktop/open-source/jabref/jablib/build/generated-src/antlr/main/org/jabref/logic/journals/ltwa/LtwaBaseVisitor.java /home/atul/Desktop/open-source/jabref/jablib/build/generated-src/antlr/main/org/jabref/logic/journals/ltwa/LtwaParser.java /home/atul/Desktop/open-source/jabref/jablib/build/generated-src/antlr/main/org/jabref/logic/journals/ltwa/LtwaListener.java
Warning: -ms option is deprecated and may be removed in a future release.
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
[jbang] [5:348] Package: /usr/lib/jvm/java-25-openjdk-amd64/bin/jar cfme /home/atul/.jbang/cache/jars/JournalListMvGenerator.java.bff0c10f23fd06d29194d79b8715c52fa23361933a4973583f068de1347c9b3c/JournalListMvGenerator.jar /tmp/jbang-manifest13347892735544845107mf JournalListMvGenerator -C /home/atul/.jbang/cache/jars/JournalListMvGenerator.java.bff0c10f23fd06d29194d79b8715c52fa23361933a4973583f068de1347c9b3c/classes .
[jbang] [5:350] Error running: /usr/lib/jvm/java-25-openjdk-amd64/bin/jar cfme /home/atul/.jbang/cache/jars/JournalListMvGenerator.java.bff0c10f23fd06d29194d79b8715c52fa23361933a4973583f068de1347c9b3c/JournalListMvGenerator.jar /tmp/jbang-manifest13347892735544845107mf JournalListMvGenerator -C /home/atul/.jbang/cache/jars/JournalListMvGenerator.java.bff0c10f23fd06d29194d79b8715c52fa23361933a4973583f068de1347c9b3c/classes .
java.io.IOException: Cannot run program "/usr/lib/jvm/java-25-openjdk-amd64/bin/jar": Exec failed, error: 2 (No such file or directory) 

[koppor]

Local solution: IntelliJ: Invalidate caches and restart. --> https://www.jetbrains.com/help/idea/invalidate-caches.html

[maxandersen]

Not sure what jetbrains invalidate caches has to do with this?

The error above is happening when ?

--verbose will just show stacktrace.

Got some steps to reproduce ?

[koppor]

I updated the description with the manual command line output.

Here the important lines:

Using JDK: 25 (25.0.2+10-Ubuntu-124.04 [dynamic], current, /usr/lib/jvm/java-25-openjdk-amd64, [Ga, Jdk]))
...
java.io.IOException: Cannot run program "/usr/lib/jvm/java-25-openjdk-amd64/bin/jar": Exec failed, error: 2 (No such file or directory) 

I assume the JDK detection checks for the directory only and not for bin/jar or other java-tooling.

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The error above is happening when ?

At gradle task :jabgui:run when it hits Task :jablib:generateJournalListMV, which is executed via https://github.com/JabRef/jabref/blob/9b78416b9527b2d8812e77518d7d0071177e3e89/jablib/build.gradle.kts#L94

[koppor]

Filed "upstream": jbangdev/jbang-devkitman#100