Cannot run program "scancode": error=2, No such file or directory

[yegor256]

I created analyzer-result.yml file with the help of this command (no issues):

$ ~/ort-45.0.0/bin/ort analyze --input-dir=. --output-dir=ort

Then, I run this command and fail:

$ ~/ort-45.0.0/bin/ort scan --ort-file=ort/analyzer-result.yml --output-dir=ort
Scanning projects with:
Exception in thread "main" java.io.IOException: Cannot run program "scancode": error=2, No such file or directory
	at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1170)
	at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1089)
	at org.ossreviewtoolkit.utils.common.ProcessCapture.<init>(ProcessCapture.kt:95)
	at org.ossreviewtoolkit.utils.common.CommandLineTool$DefaultImpls.run(CommandLineTool.kt:71)
	at org.ossreviewtoolkit.scanner.CommandLinePathScannerWrapper.run(CommandLinePathScannerWrapper.kt:32)
	at org.ossreviewtoolkit.utils.common.CommandLineTool$DefaultImpls.run(CommandLineTool.kt:82)
	at org.ossreviewtoolkit.scanner.CommandLinePathScannerWrapper.run(CommandLinePathScannerWrapper.kt:32)
	at org.ossreviewtoolkit.utils.common.CommandLineTool$DefaultImpls.getVersion(CommandLineTool.kt:88)
	at org.ossreviewtoolkit.scanner.CommandLinePathScannerWrapper.getVersion(CommandLinePathScannerWrapper.kt:32)
	at org.ossreviewtoolkit.utils.common.CommandLineTool$DefaultImpls.getVersion$default(CommandLineTool.kt:87)
	at org.ossreviewtoolkit.scanner.CommandLinePathScannerWrapper.version_delegate$lambda$0(CommandLinePathScannerWrapper.kt:33)
	at kotlin.SynchronizedLazyImpl.getValue(LazyJVM.kt:83)
	at org.ossreviewtoolkit.scanner.CommandLinePathScannerWrapper.getVersion(CommandLinePathScannerWrapper.kt:33)
	at org.ossreviewtoolkit.plugins.commands.scanner.ScannerCommand.runScanners$lambda$14(ScannerCommand.kt:190)
	at kotlin.text.StringsKt__AppendableKt.appendElement(Appendable.kt:84)
	at kotlin.collections.CollectionsKt___CollectionsKt.joinTo(_Collections.kt:3493)
	at kotlin.collections.CollectionsKt___CollectionsKt.joinToString(_Collections.kt:3510)
	at kotlin.collections.CollectionsKt___CollectionsKt.joinToString$default(_Collections.kt:3509)
	at org.ossreviewtoolkit.plugins.commands.scanner.ScannerCommand.runScanners(ScannerCommand.kt:190)
	at org.ossreviewtoolkit.plugins.commands.scanner.ScannerCommand.run(ScannerCommand.kt:148)
	at com.github.ajalt.clikt.core.CoreCliktCommandKt.parse(CoreCliktCommand.kt:107)
	at com.github.ajalt.clikt.core.CoreCliktCommandKt.main(CoreCliktCommand.kt:78)
	at com.github.ajalt.clikt.core.CoreCliktCommandKt.main(CoreCliktCommand.kt:90)
	at org.ossreviewtoolkit.cli.OrtMainKt.main(OrtMain.kt:88)
Caused by: java.io.IOException: error=2, No such file or directory
	at java.base/java.lang.ProcessImpl.forkAndExec(Native Method)
	at java.base/java.lang.ProcessImpl.<init>(ProcessImpl.java:295)
	at java.base/java.lang.ProcessImpl.start(ProcessImpl.java:225)
	at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1126)
	... 23 more

Maybe there is some issue on my side, but it would be convenient if this stacktrace contains more details about the file it can't open.

[sschuberth]

Maybe there is some issue on my side

Please see the ort requirements command mentioned under system requirements. Depending on the ORT command being used, ORT depends on some third-party tools that either need to be installed manually, or you can user the Docker image.

Also see this discussion and various closed issues about the same topic.

[yegor256]

@sschuberth got it! Maybe we can make this stracktrace more informative, in order to avoid similar bug reports in the future? For example, it may say: "run 'requirements' first and make sure there are no missing tools"

[sschuberth]

Maybe we can make this stracktrace more informative

When you say "we", does that mean you're willing to contribute? 😉

[yegor256]

@sschuberth I'm just being polite :) but let me try, maybe I can help with a PR

[sschuberth]

I'm just being polite :)

Actually, I believe it's not very polite if you say "we" but then let others do the work 😉

but let me try, maybe I can help with a PR

Great 👍🏻 This could probably be solved generically for any command-line-based scanner inside CommandLinePathScannerWrapper.