[FEATURE]: allow for concurrent JIB maven builds

[tedchang77]

Feature Request

add configuration to allow for concurrent jib maven builds

Background / Motivation

currently jib maven builds are done in serial increasing the time it takes to build multiple images.

What should the user be able to do?

run garden build on the stack graph and have builds done in parallel.

Why do they want to do this? What problem does it solve?

speed up the time it takes to build images.

Suggested Implementation(s)

allow locking behaviour to be configurable:

garden/plugins/jib/maven.ts

Line 148 in bed1a40

return buildLock.acquire("mvn", async () => {

How important is this feature for you/your team?

🌵 Not having this feature makes using Garden painful

[vvagaytsev]

Possible solutions:

• use action-specific lock names with Maven 3.8.2+, see https://issues.apache.org/jira/browse/MNG-2802
• update mvnd version used by Garden and/or allow explicit locking for mvnd, see Improvements/support concurrency in mavend #3458

[vvagaytsev]

A config option to allow concurrent maven builds was implemented in #4709. It's marked as an experimental feature and can be tried with Maven builds. The Maven Daemon has some issues with concurrent executions.

Garden has built-in concurrency control to avoid the execution of too many builds simultaneously:

• https://github.com/garden-io/garden/blob/main/core/src/graph/solver.ts#L73
• https://github.com/garden-io/garden/blob/main/core/src/tasks/build.ts#L21

So, using regular maven in concurrent mode should not be an issue. It won't produce too many processes. Garden uses Maven 3.8.8, the issue with concurrent access to the local repo was solved in 3.8.2, see https://issues.apache.org/jira/browse/MNG-2802