Bug fix for legacy libs using .pde examples.

[Chris--A]

The newer build system does not work correctly with .pde files. The .ino extension is hard coded and avrdude results in an error: "cannot find file".

This fix will prompt the user to allow the IDE to auto update the extensions.
This only checks legacy libraries.

These are the errors that appear when trying to upload an example using .pde

Reading | ################################################## | 100% 0.01s

avrdude: Device signature = 0x1e9801
avrdude: reading input file "C:\Users\Chris\AppData\Local\Temp\build9273366a9a263951d3a7df5914e80d49.tmp/NewPingExample.ino.hex"
avrdude: can't open input file C:\Users\Chris\AppData\Local\Temp\build9273366a9a263951d3a7df5914e80d49.tmp/NewPingExample.ino.hex: No such file or directory
avrdude: read from file 'C:\Users\Chris\AppData\Local\Temp\build9273366a9a263951d3a7df5914e80d49.tmp/NewPingExample.ino.hex' failed

avrdude done.  Thank you.

If you want me to change the text, or make it force the update (only Ok, not Yes/No) let me know and I'll amend my commit.

Cheers.

[matthijskooijman]

@ffissore, was support for .pde files intentionally dropped? They used to still work before arduino-builder AFAIK?

[Chris--A]

Yeah, .pde's did work. Since arduino-builder it appears the .ino extension is hard coded. It must blindly copy the sketch source.

[ffissore]

Confirm. Working on it

[ffissore]

Fixed. Fix will be available with next hourly build http://www.arduino.cc/en/Main/Software#hourly