validate CHROME_SRC setting to avoid confusion

build/android/envsetup.sh

Index: build/android/envsetup.sh
diff --git a/build/android/envsetup.sh b/build/android/envsetup.sh
index 6ed168de6aa7e5d306736d3d884406a822f445e4..792a5f4753919fd5e64478e8deed93e2bc015562 100755
--- a/build/android/envsetup.sh
+++ b/build/android/envsetup.sh
@@ -91,9 +91,17 @@ export PATH=$PATH:${ANDROID_SDK_ROOT}/platform-tools
 # Must have tools like arm-linux-androideabi-gcc on the path for ninja
 export PATH=$PATH:${ANDROID_TOOLCHAIN}
 
+PWD=$(readlink -f .)

[John Grabowski, 2012/05/25 02:19:28]

The shell sets $PWD so I don't think you want to override it.
(Can't you just reference it without setting it?)

[Wei James(wistoch), 2012/05/25 02:53:24]

yes. fixed. thanks 

+
 if [ -z "${CHROME_SRC}" ]; then
   # If $CHROME_SRC was not set, assume current directory is CHROME_SRC.
-  export CHROME_SRC=$(readlink -f .)
+  export CHROME_SRC="${PWD}"
+fi
+
+if [ "${PWD/"${CHROME_SRC}"/}" == "${PWD}" ]; then

[John Grabowski, 2012/05/25 02:19:28]

Add comment explaining motivation

[Wei James(wistoch), 2012/05/25 02:53:24]

fixed. thanks 

+  echo "Warning: Current directory is out of CHROME_SRC, it may not be \
+the one you want."
+  echo "${CHROME_SRC}"
 fi
 
 if [ ! -d "${CHROME_SRC}" ]; then