feat: change default git scan mode to repo (#5399)

* feat: change default git scan mode to `repo`

The `repo` scan mode loads the entire repo files into a tree structure and applies glob matching from there.
This prevents a large amount of `git` subprocesses being spawned, and is much faster for large projects.
Especially on Windows it has a large performance benefit due to Windows being slow at spawning subprocesses.
We change this to be the default now, but it can always be overridden using the `GARDEN_GIT_SCAN_MODE=subtree` environment variable.

* chore: less noisy logging

* test: fix garden directory for version calculation tests

core/src/constants.ts

@@ -72,7 +72,7 @@ export const gardenEnv = {
   GARDEN_ENVIRONMENT: env.get("GARDEN_ENVIRONMENT").required(false).asString(),
   GARDEN_EXPERIMENTAL_BUILD_STAGE: env.get("GARDEN_EXPERIMENTAL_BUILD_STAGE").required(false).asBool(),
   GARDEN_GE_SCHEDULED: env.get("GARDEN_GE_SCHEDULED").required(false).asBool(),
-  GARDEN_GIT_SCAN_MODE: env.get("GARDEN_GIT_SCAN_MODE").required(false).asEnum(gitScanModes),
+  GARDEN_GIT_SCAN_MODE: env.get("GARDEN_GIT_SCAN_MODE").required(false).default("repo").asEnum(gitScanModes),
   GARDEN_LEGACY_BUILD_STAGE: env.get("GARDEN_LEGACY_BUILD_STAGE").required(false).asBool(),
   GARDEN_LOG_LEVEL: env.get("GARDEN_LOG_LEVEL").required(false).asString(),
   GARDEN_LOGGER_TYPE: env.get("GARDEN_LOGGER_TYPE").required(false).asString(),

core/src/vcs/git-repo.ts

@@ -110,11 +110,11 @@ export class GitRepoHandler extends GitHandler {
       existing = this.cache.get(log, key)
 
       if (existing) {
-        params.log.silly(`Found cached repository match at ${path}`)
+        log.silly(`Found cached repository match at ${path}`)
         return existing
       }
 
-      params.log.info(`Scanning repository at ${path}`)
+      log.silly(`Scanning repository at ${path}`)
       const files = await super.getFiles({ ...params, scanRoot: undefined })
 
       const fileTree = FileTree.fromFiles(files)

core/test/unit/src/plugins/container/container.ts

@@ -251,7 +251,7 @@ describe("plugins.container", () => {
         config: moduleConfig,
         buildDependencies: [],
         forceVersion: true,
-        scanRoot: garden.projectRoot,
+        scanRoot: projectRoot,
       })
     }