binary search tool: Add android switch scripts

Add switch scripts for android bisector. Each script hardlinks files
from GOOD/BAD cache into working tree. ln/touch are invoked via xargs
to allow easier input parsing and parallel execution.

TEST=Tested various code paths and tried with prototype bisector

Change-Id: I9f52358737e8d18486287eb9e4d30bf3e1ad13ea
Reviewed-on: https://chrome-internal-review.googlesource.com/271725
Commit-Ready: Cassidy Burden <cburden@google.com>
Tested-by: Cassidy Burden <cburden@google.com>
Reviewed-by: Caroline Tice <cmtice@google.com>
Reviewed-by: Han Shen <shenhan@google.com>

2 files changed, 83 insertions, 0 deletions

diff --git a/binary_search_tool/android/switch_to_bad.sh b/binary_search_tool/android/switch_to_bad.sh
new file mode 100755
index 00000000..7bb55dbf
--- /dev/null
+++ b/binary_search_tool/android/switch_to_bad.sh
@@ -0,0 +1,42 @@
+#!/bin/bash -u
+#
+# Copyright 2016 Google Inc. All Rights Reserved.
+#
+# This script is intended to be used by binary_search_state.py, as
+# part of the binary search triage on the Android source tree.  This script
+# symlinks a list of object files from the 'bad' build tree into the working
+# build tree, for testing.
+#
+# It is highly recommended to not use --noincremental with these scripts. If the
+# switch scripts are given non incremental sets of GOOD/BAD objects, make will
+# not be able to do an incremental build and will take much longer to build.
+#
+
+
+source android/common.sh
+
+OBJ_LIST_FILE=$1
+
+# Symlink from BAD obj to working tree.
+SWITCH_CMD="ln -f ${BISECT_BAD_BUILD}/{} ${BISECT_WORK_BUILD}/{}; touch ${BISECT_WORK_BUILD}/{};"
+
+overall_status=0
+
+# Check that number of arguments == 1
+if [ $# -eq 1 ] ; then
+  # Run symlink once per input line, ignore empty lines.
+  # Have ${BISECT_NUM_JOBS} processes running concurrently.
+  # Pass to "sh" to allow multiple commands to be executed.
+  xargs -P ${BISECT_NUM_JOBS} -a ${OBJ_LIST_FILE} -r -l -I '{}' \
+    sh -c "${SWITCH_CMD}"
+else
+  echo "ERROR:"
+  echo "Please run the binary search tool with --file_args"
+  echo "Android has too many files to be passed as command line arguments"
+  echo "The binary search tool will now exit..."
+  exit 1
+fi
+overall_status=$?
+
+
+exit ${overall_status}
diff --git a/binary_search_tool/android/switch_to_good.sh b/binary_search_tool/android/switch_to_good.sh
new file mode 100755
index 00000000..485ece73
--- /dev/null
+++ b/binary_search_tool/android/switch_to_good.sh
@@ -0,0 +1,41 @@
+#!/bin/bash -u
+#
+# Copyright 2016 Google Inc. All Rights Reserved.
+#
+# This script is intended to be used by binary_search_state.py, as
+# part of the binary search triage on the Android source tree.  This script
+# symlinks a list of object files from the 'good' build tree into the working
+# build tree, for testing.
+#
+# It is highly recommended to not use --noincremental with these scripts. If the
+# switch scripts are given non incremental sets of GOOD/BAD objects, make will
+# not be able to do an incremental build and will take much longer to build.
+#
+
+source android/common.sh
+
+OBJ_LIST_FILE=$1
+
+# Symlink from GOOD obj to working tree.
+SWITCH_CMD="ln -f ${BISECT_GOOD_BUILD}/{} ${BISECT_WORK_BUILD}/{}; touch ${BISECT_WORK_BUILD}/{};"
+
+overall_status=0
+
+# Check that number of arguments == 1
+if [ $# -eq 1 ] ; then
+  # Run symlink once per input line, ignore empty lines.
+  # Have ${BISECT_NUM_JOBS} processes running concurrently.
+  # Pass to "sh" to allow multiple commands to be executed.
+  xargs -P ${BISECT_NUM_JOBS} -a ${OBJ_LIST_FILE} -r -l -I '{}' \
+    sh -c "${SWITCH_CMD}"
+else
+  echo "ERROR:"
+  echo "Please run the binary search tool with --file_args"
+  echo "Android has too many files to be passed as command line arguments"
+  echo "The binary search tool will now exit..."
+  exit 1
+fi
+overall_status=$?
+
+
+exit ${overall_status}