com-lihaoyi/mill
A better build tool for Java, Scala and Kotlin: Simpler than Maven, easier than Gradle, with 3-7x faster dev workflows than other JVM build tools
Is com-lihaoyi/mill beginner-friendly?
The maintainers of com-lihaoyi/mill usually reply to a pull request within 7 days. 5 beginner-friendly issues are open now.
- Stars
- 2.8k
- Forks
- 447
- Open beginner issues
- 5
- Indexed issues
- 180
- Avg merge
- 1d 10h
- Merged PRs (30d)
- 58
- Dominant language
- Scala
- License
- MIT
- Last GitHub push
- Sep 19, 2026
- Latest indexed
- Sep 20, 2026
- Contributing guide
- No contributing guide
- Code of conduct
- Code of conduct
- Beginner labels
- good first issue
How to contribute to com-lihaoyi/mill
- There is no contributing guide, so start from the README and a few recently merged pull requests to see how changes are proposed.
- Read its code of conduct: it covers issues and pull requests as well as chat.
- Your contributions will be published under the project's MIT license.
- Pick one of the 5 open beginner-friendly issues below and comment that you want to work on it before you start.
Issues somebody may already be working on are listed last. List everything by date
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Difficulty 3/5 1-2 days Newbie friendliness 55/100
com-lihaoyi/mill#7615 ·
Maintainers usually reply within 7 days
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Difficulty 2/5 1-3 hours Newbie friendliness 42/100
com-lihaoyi/mill#7599 ·
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Difficulty 3/5 1-2 days Newbie friendliness 58/100
com-lihaoyi/mill#7587 · 1 comment ·
Maintainers usually reply within 7 days
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Difficulty 4/5 3-5 days Newbie friendliness 45/100
com-lihaoyi/mill#7583 ·
Maintainers usually reply within 7 days
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feedback wanted
Difficulty 5/5 Over a week Newbie friendliness 35/100
com-lihaoyi/mill#7566 ·
Maintainers usually reply within 7 days
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Difficulty 3/5 1-2 days Newbie friendliness 75/100
com-lihaoyi/mill#7562 · 1 comment ·
Maintainers usually reply within 7 days
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Difficulty 3/5 1-2 days Newbie friendliness 72/100
com-lihaoyi/mill#7561 · 1 comment ·
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Difficulty 5/5 Over a week Newbie friendliness 30/100
com-lihaoyi/mill#7556 ·
Maintainers usually reply within 7 days
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next-major
Difficulty 5/5 Over a week Newbie friendliness 20/100
com-lihaoyi/mill#7547 ·
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Difficulty 3/5 1-2 days Newbie friendliness 65/100
com-lihaoyi/mill#7546 ·
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Difficulty 3/5 1-2 days Newbie friendliness 68/100
com-lihaoyi/mill#7527 · 1 comment ·
Maintainers usually reply within 7 days
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Typescript codegenOpen
Difficulty 4/5 3-5 days Newbie friendliness 35/100
com-lihaoyi/mill#7468 ·
Maintainers usually reply within 7 days
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ci/cd
Difficulty 4/5 3-5 days Newbie friendliness 58/100
com-lihaoyi/mill#7453 · 1 reaction ·
Maintainers usually reply within 7 days
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Difficulty 5/5 Over a week Newbie friendliness 38/100
com-lihaoyi/mill#7452 · 1 comment · 1 reaction ·
Maintainers usually reply within 7 days
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Enhancement request: testOnly can be used to run ScalaTest suites annotated with @DoNotDiscoverOpen
Difficulty 3/5 1-2 days Newbie friendliness 68/100
com-lihaoyi/mill#7450 · 2 comments · 1 reaction ·
Maintainers usually reply within 7 days
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Difficulty 4/5 3-5 days Newbie friendliness 55/100
com-lihaoyi/mill#7443 · 4 comments ·
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javalib
Difficulty 3/5 1-2 days Newbie friendliness 58/100
com-lihaoyi/mill#7441 ·
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contrib
Difficulty 4/5 3-5 days Newbie friendliness 55/100
com-lihaoyi/mill#7435 · 2 comments ·
Maintainers usually reply within 7 days
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Difficulty 4/5 3-5 days Newbie friendliness 48/100
com-lihaoyi/mill#7429 · 3 comments · 2 reactions ·
Maintainers usually reply within 7 days
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Difficulty 3/5 1-2 days Newbie friendliness 52/100
com-lihaoyi/mill#7384 ·
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Difficulty 4/5 3-5 days Newbie friendliness 52/100
com-lihaoyi/mill#7381 · 1 comment ·
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Difficulty 3/5 1-2 days Newbie friendliness 62/100
com-lihaoyi/mill#7376 · 1 comment ·
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Difficulty 4/5 3-5 days Newbie friendliness 50/100
com-lihaoyi/mill#7366 · 7 comments · 1 reaction ·
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Difficulty 3/5 1-2 days Newbie friendliness 48/100
com-lihaoyi/mill#7365 ·
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Difficulty 2/5 1-3 hours Newbie friendliness 68/100
com-lihaoyi/mill#7356 · 1 comment ·
Maintainers usually reply within 7 days
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Difficulty 3/5 1-2 days Newbie friendliness 48/100
com-lihaoyi/mill#7354 · 2 comments ·
Maintainers usually reply within 7 days
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workaround-available
Difficulty 4/5 3-5 days Newbie friendliness 45/100
com-lihaoyi/mill#7350 · 1 comment ·
Maintainers usually reply within 7 days
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Difficulty 2/5 1-3 hours Newbie friendliness 62/100
com-lihaoyi/mill#7347 ·
Maintainers usually reply within 7 days
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Difficulty 4/5 3-5 days Newbie friendliness 45/100
com-lihaoyi/mill#7344 ·
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Difficulty 4/5 3-5 days Newbie friendliness 45/100
com-lihaoyi/mill#7343 ·
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Difficulty 3/5 1-2 days Newbie friendliness 58/100
com-lihaoyi/mill#7341 · 2 comments ·
Maintainers usually reply within 7 days
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BSP server responds with `JvmBuildTarget` where `javaVersion` always corresponds to system propertyOpen
Difficulty 4/5 3-5 days Newbie friendliness 55/100
com-lihaoyi/mill#7319 ·
Maintainers usually reply within 7 days
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workaround-available
Difficulty 3/5 1-2 days Newbie friendliness 58/100
com-lihaoyi/mill#7309 · 3 comments · 1 reaction ·
Maintainers usually reply within 7 days
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Difficulty 4/5 3-5 days Newbie friendliness 45/100
com-lihaoyi/mill#7299 · 1 comment ·
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Difficulty 4/5 3-5 days Newbie friendliness 52/100
com-lihaoyi/mill#7284 · 5 comments ·
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Difficulty 4/5 3-5 days Newbie friendliness 52/100
com-lihaoyi/mill#7283 · 7 comments ·
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Difficulty 4/5 3-5 days Newbie friendliness 48/100
com-lihaoyi/mill#7270 ·
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Difficulty 3/5 1-2 days Newbie friendliness 65/100
com-lihaoyi/mill#7269 · 1 comment ·
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Difficulty 4/5 3-5 days Newbie friendliness 48/100
com-lihaoyi/mill#7207 · 6 comments · 7 reactions ·
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Difficulty 3/5 1-2 days Newbie friendliness 55/100
com-lihaoyi/mill#7192 ·
Maintainers usually reply within 7 days
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Difficulty 3/5 1-2 days Newbie friendliness 58/100
com-lihaoyi/mill#7160 · 1 reaction ·
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Difficulty 4/5 3-5 days Newbie friendliness 50/100
com-lihaoyi/mill#7150 ·
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Difficulty 4/5 3-5 days Newbie friendliness 48/100
com-lihaoyi/mill#7142 · 7 comments ·
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Difficulty 3/5 1-2 days Newbie friendliness 55/100
com-lihaoyi/mill#7094 · 3 comments ·
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Difficulty 5/5 Over a week Newbie friendliness 25/100
com-lihaoyi/mill#7088 · 1 comment ·
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Difficulty 5/5 Over a week Newbie friendliness 35/100
com-lihaoyi/mill#7087 · 1 comment ·
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Difficulty 3/5 1-2 days Newbie friendliness 52/100
com-lihaoyi/mill#7078 ·
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Difficulty 4/5 3-5 days Newbie friendliness 48/100
com-lihaoyi/mill#7066 · 1 reaction ·
Maintainers usually reply within 7 days
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PowerShell mill.bat: -Dkey=value with unquoted dotted value fails with misleading file-lock errorOpen
Difficulty 3/5 1-2 days Newbie friendliness 52/100
com-lihaoyi/mill#7061 · 5 comments ·
Maintainers usually reply within 7 days
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Difficulty 5/5 Over a week Newbie friendliness 25/100
com-lihaoyi/mill#7056 · 9 comments ·
Maintainers usually reply within 7 days
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