binary search tool: Move root path of cros_pkg execution, rename scripts

Update cros_pkg scripts and bisect.py so that the package bisector needs
to be run from binary_search_tool/ instead of
binary_search_tool/cros_pkg. This fits with how sysroot_wrapper
implements its scripts. Also rename all cros_pkg scripts to remove
cros_pkg prefix and remove undo_eclean.py.

TEST=Run unit tests and run interactive/testing cros_pkg test

Change-Id: I2781319934b704b91346745ae2d4d916fee35d02
Reviewed-on: https://chrome-internal-review.googlesource.com/266365
Commit-Ready: Cassidy Burden <cburden@google.com>
Tested-by: Cassidy Burden <cburden@google.com>
Reviewed-by: Caroline Tice <cmtice@google.com>

1 files changed, 110 insertions, 0 deletions

diff --git a/binary_search_tool/cros_pkg/create_cleanup_script.py b/binary_search_tool/cros_pkg/create_cleanup_script.py
new file mode 100755
index 00000000..45a90260
--- /dev/null
+++ b/binary_search_tool/cros_pkg/create_cleanup_script.py
@@ -0,0 +1,110 @@
+#!/usr/bin/python2
+#
+#  Copyright 2015 Google Inc. All Rights Reserved
+"""The script to generate a cleanup script after setup.sh.
+
+This script takes a set of flags, telling it what setup.sh changed
+during the set up process. Based on the values of the input flags, it
+generates a cleanup script, named ${BOARD}_cleanup.sh, which will
+undo the changes made by setup.sh, returning everything to its
+original state.
+"""
+
+from __future__ import print_function
+
+import argparse
+import sys
+
+
+def Usage(parser, msg):
+  print('ERROR: ' + msg)
+  parser.print_help()
+  sys.exit(1)
+
+
+def Main(argv):
+  """Generate a script to undo changes done by setup.sh
+
+    The script setup.sh makes a change that needs to be
+    undone, namely it creates a soft link making /build/${board} point
+    to /build/${board}.work.  To do this, it had to see if
+    /build/${board} already existed, and if so, whether it was a real
+    tree or a soft link.  If it was soft link, it saved the old value
+    of the link, then deleted it and created the new link.  If it was
+    a real tree, it renamed the tree to /build/${board}.save, and then
+    created the new soft link.  If the /build/${board} did not
+    previously exist, then it just created the new soft link.
+
+    This function takes arguments that tell it exactly what setup.sh
+    actually did, then generates a script to undo those exact changes.
+  """
+
+  parser = argparse.ArgumentParser()
+  parser.add_argument('--board',
+                      dest='board',
+                      required=True,
+                      help='Chromeos board for packages/image.')
+
+  parser.add_argument('--old_tree_missing',
+                      dest='tree_existed',
+                      action='store_false',
+                      help='Did /build/${BOARD} exist.',
+                      default=True)
+
+  parser.add_argument('--renamed_tree',
+                      dest='renamed_tree',
+                      action='store_true',
+                      help='Was /build/${BOARD} saved & renamed.',
+                      default=False)
+
+  parser.add_argument('--old_link',
+                      dest='old_link',
+                      help=('The original build tree soft link.'))
+
+  options = parser.parse_args(argv[1:])
+
+  if options.old_link or options.renamed_tree:
+    if not options.tree_existed:
+      Usage(parser, 'If --tree_existed is False, cannot have '
+            '--renamed_tree or --old_link')
+
+  if options.old_link and options.renamed_tree:
+    Usage(parser, '--old_link and --renamed_tree are incompatible options.')
+
+  if options.tree_existed:
+    if not options.old_link and not options.renamed_tree:
+      Usage(parser, 'If --tree_existed is True, then must have either '
+            '--old_link or --renamed_tree')
+
+  out_filename = 'cros_pkg/' + options.board + '_cleanup.sh'
+
+  with open(out_filename, 'w') as out_file:
+    out_file.write('#!/bin/bash\n\n')
+    # First, remove the 'new' soft link.
+    out_file.write('sudo rm /build/%s\n' % options.board)
+    if options.tree_existed:
+      if options.renamed_tree:
+        # Old build tree existed and was a real tree, so it got
+        # renamed.  Move the renamed tree back to the original tree.
+        out_file.write('sudo mv /build/%s.save /build/%s\n' %
+                       (options.board, options.board))
+      else:
+        # Old tree existed and was already a soft link.  Re-create the
+        # original soft link.
+        original_link = options.old_link
+        if original_link[0] == "'":
+          original_link = original_link[1:]
+        if original_link[-1] == "'":
+          original_link = original_link[:-1]
+        out_file.write('sudo ln -s %s /build/%s\n' % (original_link,
+                                                      options.board))
+    out_file.write('\n')
+    # Remove common.sh file
+    out_file.write('rm cros_pkg/common.sh\n')
+
+  return 0
+
+
+if __name__ == '__main__':
+  retval = Main(sys.argv)
+  sys.exit(retval)