Allow overriding tools/bazel path with BAZELISK_WRAPPER_PATH

In some projects the tools/bazel path isn't practical. This allows
users to override this path with the BAZELISK_WRAPPER_PATH env var /
.bazeliskrc config option.

Author: keith

core/core.go

@@ -33,10 +33,10 @@ import (
 )
 
 const (
-	bazelReal      = "BAZEL_REAL"
-	skipWrapperEnv = "BAZELISK_SKIP_WRAPPER"
-	wrapperPath    = "./tools/bazel"
-	maxDirLength   = 255
+	bazelReal          = "BAZEL_REAL"
+	skipWrapperEnv     = "BAZELISK_SKIP_WRAPPER"
+	defaultWrapperPath = "./tools/bazel"
+	maxDirLength       = 255
 )
 
 var (
@@ -496,6 +496,11 @@ func maybeDelegateToWrapperFromDir(bazel string, wd string, config config.Config
 		return bazel
 	}
 
+	wrapperPath := config.Get("BAZELISK_WRAPPER_PATH")
+	if wrapperPath == "" {
+		wrapperPath = defaultWrapperPath
+	}
+
 	root := ws.FindWorkspaceRoot(wd)
 	wrapper := filepath.Join(root, wrapperPath)
 	if stat, err := os.Stat(wrapper); err == nil && !stat.Mode().IsDir() && stat.Mode().Perm()&0111 != 0 {