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docs/working_remotely_with_android.md

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+# Introduction
+
+When you call `$SRC/build/android/run_tests.py` or `$SRC/build/android/run_instrumentation_tests.py` it assumes an android device is attached to the local host.
+
+If you want to work remotely from your laptop with an android device attached to it, while keeping an ssh connection to a remote desktop machine where you have your build environment setup, you will have to use one of the two alternatives listed below.
+
+
+# Option 1: SSHFS - Mounting the out/Debug directory
+
+### On your remote host machine
+(_you can open a regular ssh to your host_)
+```
+# build it
+desktop$ cd $SRC;
+desktop$ . build/android/envsetup.sh
+desktop$ build/gyp_chromium -DOS=android
+desktop$ ninja -C out/Debug
+```
+(see also AndroidBuildInstructions).
+
+
+### On your laptop
+(_you have to have an android device attached to it_)
+```
+# Install sshfs
+laptop$ sudo apt-get install sshfs
+
+# Mount the chrome source from your remote host machine into your local laptop.
+laptop$ mkdir ~/chrome_sshfs
+laptop$ sshfs your.host.machine:/usr/local/code/chrome/src ./chrome_sshfs
+
+# Setup enviroment.
+laptop$ cd chrome_sshfs
+laptop$ . build/android/envsetup.sh
+laptop$ adb devices
+laptop$ adb root
+
+# Install APK (which was previously built in the host machine).
+laptop$ python build/android/adb_install_apk.py --apk ContentShell.apk --apk_package org.chromium.content_shell
+
+# Run tests.
+laptop$ python build/android/run_instrumentation_tests.py -I --test-apk ContentShellTest -vvv
+```
+
+**This is assuming you have the exact same linux version on your host machine and in your laptop.**
+
+But if you have different versions, lets say, ubuntu lucid on your laptop, and the newer ubuntu precise on your host machine, some binaries compiled on the host will not work on your laptop.
+In this case you will have to recompile these binaries in your laptop:
+```
+# May need to install dependencies on your laptop.
+laptop$ sudo ./build/install-build-deps-android.sh
+
+# Rebuild the needed binaries on your laptop.
+laptop$ build/gyp_chromium -DOS=android
+laptop$ ninja -C out/Debug md5sum host_forwarder
+```
+
+
+# Option 2: SSH Tunneling
+
+## Option 2a: Use a script
+
+Copy src/tools/android/adb\_remote\_setup.sh to your laptop, then run it. adb\_remote\_setup.sh updates itself, so you only need to copy it once.
+
+```
+laptop$ curl "http://src.chromium.org/svn/trunk/src/tools/android/adb_remote_setup.sh" > adb_remote_setup.sh
+laptop$ chmod +x adb_remote_setup.sh
+laptop$ ./adb_remote_setup.sh <desktop_hostname> <path_to_adb_on_desktop>
+```
+
+## Option 2b: Manual tunneling
+
+You have to make sure that ports 5037, 10000, ad 10201 are not being used on either your laptop or your desktop.
+Try the command: `netstat -nap | grep 10000` to see
+
+Kill the pids that are using those ports.
+
+### On your host machine
+```
+desktop$ killall adb
+desktop$ killall host_forwarder
+```
+
+### On your laptop
+```
+laptop$ ssh -C -R 5037:localhost:5037 -R 10000:localhost:10000 -R 10201:localhost:10201 <desktop_host_name>
+```
+
+### On your host machine
+```
+desktop$ python build/android/run_instrumentation_tests.py -I --test-apk ContentShellTest -vvv
+```