Remove --develop-from option in calibre-debug as it is no longer needed

src/calibre/debug.py

@@ -35,18 +35,9 @@ Run an embedded python interpreter.
     parser.add_option('--pdfreflow', default=None,
             help='Path to PDF file to try and reflow. Output will be placed in '
             'current directory. ')
-    parser.add_option('-f', '--develop-from', default=None,
-            help=('Develop calibre from the specified path. '
-                'The path should point to the src sub-directory in the '
-                'calibre source tree.'))
 
     return parser
 
-def develop_from(path):
-    from calibre.gui2 import build_forms
-    print 'Compiling .ui forms...'
-    build_forms(path)
-
 def migrate(old, new):
     from calibre.utils.config import prefs
     from calibre.library.database import LibraryDatabase
@@ -192,8 +183,6 @@ def main(args=sys.argv):
         from calibre.utils.logging import default_log
         opts2, args = px().parse_args(['xxxx', '-vvvv', opts.pdfreflow])
         run(opts2, opts.pdfreflow, default_log)
-    elif opts.develop_from is not None:
-        develop_from(opts.develop_from)
     else:
         from calibre import ipython
         ipython()

src/calibre/gui2/__init__.py

@@ -596,3 +596,6 @@ def build_forms(srcdir, info=None):
 
             open(compiled_form, 'wb').write(dat)
 
+_df = os.environ.get('CALIBRE_DEVELOP_FROM', None)
+if _df and os.path.exists(_df):
+    build_forms(_df)

src/calibre/manual/develop.rst

@@ -94,11 +94,8 @@ the previously checked out calibre code directory, for example::
 
     cd C:\Users\kovid\work\calibre
 
-calibre is the directory that contains the src and resources sub directories. Then, run the following command::
+calibre is the directory that contains the src and resources sub directories. 
 
-    calibre-debug --develop-from src
-
-This assumes that the location of the calibre install (typically ``C:\Program Files\calibre``) is in your PATH. 
 The next step is to set the environment variable ``CALIBRE_DEVELOP_FROM`` to the absolute path to the src directory.
 So, following the example above, it would be ``C:\Users\kovid\work\calibre\src``. A short
 `guide <http://docs.python.org/using/windows.html#excursus-setting-environment-variables>`_ to setting environment
@@ -117,8 +114,6 @@ in your favorite editor and add the line::
     print "Hello, world!"
 
 near the top of the file. Now run the command :command:`calibredb`. The very first line of output should be ``Hello, world!``.
-Note that if you make changes to any .ui files (these files define the |app| Graphical User Interface), you have to re-run the
-``calibre-debug --develop-from src`` command, which  will compile the .ui files, so that your changes show up. 
 
 OS X development environment
 ------------------------------
@@ -128,11 +123,8 @@ the previously checked out calibre code directory, for example::
 
     cd /Users/kovid/work/calibre
 
-calibre is the directory that contains the src and resources sub directories. Then, run the following command::
+calibre is the directory that contains the src and resources sub directories. Ensure you have installed the |app| commandline tools via Preferences->Advanced in the |app| GUI.
 
-    calibre-debug --develop-from src
-
-This assumes that you have installed the |app| command line tools. This can be done via Preferences->Advanced in the |app| GUI. 
 The next step is to set the environment variable ``CALIBRE_DEVELOP_FROM`` to the absolute path to the src directory.
 So, following the example above, it would be ``/Users/kovid/work/calibre/src``. Apple 
 `documentation <http://developer.apple.com/mac/library/documentation/MacOSX/Conceptual/BPRuntimeConfig/Articles/EnvironmentVars.html#//apple_ref/doc/uid/20002093-BCIJIJBH>`_
@@ -151,8 +143,6 @@ in your favorite editor and add the line::
     print "Hello, world!"
 
 near the top of the file. Now run the command :command:`calibredb`. The very first line of output should be ``Hello, world!``.
-Note that if you make changes to any .ui files (these files define the |app| Graphical User Interface), you have to re-run the
-``calibre-debug --develop-from src`` command, which  will compile the .ui files, so that your changes show up. 
 
 Linux development environment
 ------------------------------
@@ -166,9 +156,7 @@ Install the |app| using the binary installer. The opena  terminal and change to
 
     cd /home/kovid/work/calibre
 
-calibre is the directory that contains the src and resources sub directories. Then, run the following command::
+calibre is the directory that contains the src and resources sub directories. 
-
-    calibre-debug --develop-from src
 
 The next step is to set the environment variable ``CALIBRE_DEVELOP_FROM`` to the absolute path to the src directory.
 So, following the example above, it would be ``/home/kovid/work/calibre/src``. How to set environment variables depends on
@@ -187,7 +175,4 @@ in your favorite editor and add the line::
     print "Hello, world!"
 
 near the top of the file. Now run the command :command:`calibredb`. The very first line of output should be ``Hello, world!``.
-Note that if you make changes to any .ui files (these files define the |app| Graphical User Interface), you have to re-run the
-``calibre-debug --develop-from src`` command, which will compile the .ui files, so that your changes show up. 
-