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add notes about older checkouts

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Ben Fry
2022-08-07 19:16:08 -04:00
parent 56edf1a079
commit 924b743989
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build/README.md
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@@ -10,6 +10,21 @@ The short version:
ant run
### Updating an older 4.x checkout
If you checked out this repository before, but now it's behaving strangely, try the following:
git pull
git checkout main
ant clean
ant clean-libs
ant run
Major changes happened during the 4.x series, including a reorganization of the *core* library, changes to how `.jar` files for libraries were downloaded, and the `master` branch was renamed to `main`.
The `ant clean-libs` task (added in 4.0 beta 9) clears out downloaded support files (JOGL, Ant, etc) and makes sure they're the latest versions.
### Java version complaints
You might have multiple versions of Java installed. Type `java -version` and if it says something other than 17, you'll need to set the `JAVA_HOME` environment variable.