ddk_bootstrap: Update flag name for Kleaf repo

* `kleaf_repo_dir` was shortened to `kleaf_repo` in init_ddk script to
  keep it consistent with the flag here, so it's updated accordingly.
* This also adds a brief quickstart guide in README.md file.

Bug: 328770706
Change-Id: Iafb13701a4d02a43a0cc19f3b1ac9db5325b0a5b
Signed-off-by: Ulises Mendez Martinez <umendez@google.com>

2 files changed, 18 insertions, 1 deletions

diff --git a/README.md b/README.md
index 88a78c1..54856ec 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,18 @@
 # Bootstrapping DDKv2
 
 This project contains code to bootstrap DDKv2 development.
+
+## Quick Start
+
+* Using sources from local Kleaf repo checkout.
+
+```shell
+python3 init.py  --local --kleaf_repo=/abs/path/to/ACK
+```
+
+* Using local prebuilts with local sources.
+
+```shell
+python3 init.py --prebuilts_dir=/abs/path/to/prebuilts  --local --kleaf_repo=/abs/path/to/ACK
+```
+
diff --git a/init.py b/init.py
index c0fd035..76d9d17 100644
--- a/init.py
+++ b/init.py
@@ -81,6 +81,8 @@ class KleafBootstrap:
         common_args = []
         if self.build_target:
             common_args += ["--build_target", self.build_target]
+        if self.kleaf_repo:
+            common_args += ["--kleaf_repo", self.kleaf_repo]
         common_args += ["--url_fmt", self.url_fmt]
         common_args += ["--ddk_workspace", self.ddk_workspace]
         common_args += self.unknown_args
@@ -89,7 +91,7 @@ class KleafBootstrap:
     def run(self):
         if self.local:
             args = [_TOOLS_BAZEL, "run", _INIT_DDK_TARGET]
-            args += ["--", "--kleaf_repo_dir", self.kleaf_repo]
+            args += ["--"]
             args += self._common_args()
             self._run_script(args, cwd=self.kleaf_repo)
             return