Adding "Open Anaconda Prompt here" to context menu (Windows) - windows

Question

I'd like to add an option on my context menu (Windows 7 and 10) to open an Anaconda Prompt into the file location when I right-click the folder, but I can't figure out the right registry key.
Here's what I know how to do:
Add an item to the context menu that opens a normal command window at the folder location
Open an Anaconda prompt from cmd (run their "activate.bat" file)
What I can't figure out is how to combine these steps into a single registry key so I can open an Anaconda Prompt and then cd in that prompt to the current folder. But maybe I'm approaching this the wrong way.
Help from internet gurus is appreciated.

Answer 1

Run Registry Editor (regedit.exe)
Go to HKEY_CLASSES_ROOT > Directory > Background > shell
Add a key named AnacondaPrompt and set its value to Anaconda Prompt Here
Add a key under this key called command, and set its value to cmd.exe /K C:\Users\user\Anaconda3\Scripts\activate.bat change the location to wherever your Anaconda installation is located.

Answer 2

In recent Anaconda versions (I'm at conda 4.5.5) they have changed the behaviour and the shortcut to Anaconda Prompt, so the new procedure is in fact a bit simpler than described by bdforbes.
The new way to launch Anaconda Prompt in a folder is
cmd.exe /K %%USERPROFILE%%\AppData\Local\Continuum\Anaconda3\Scripts\activate.bat
pushd is to change the current directory, %V is the current directory, and /K is to run a command.
So the modified cwp2.py is not needed anymore. Put the following contents in a .bat-file and run as administrator to add the needed keys to the registry (a modified version of the gist posted by Thibaud Ruelle in the comments to the other answer)
REG ADD HKCR\Directory\Background\shell\Anaconda\ /ve /f /d "Anaconda Prompt Here"
REG ADD HKCR\Directory\Background\shell\Anaconda\ /v Icon /f /t REG_EXPAND_SZ /d %%USERPROFILE%%\\Anaconda3\\Menu\\Iconleak-Atrous-Console.ico
REG ADD HKCR\Directory\Background\shell\Anaconda\command /f /ve /t REG_EXPAND_SZ /d "%windir%\System32\cmd.exe pushd "%V" "/K" %%USERPROFILE%%\Anaconda3\Scripts\activate.bat %%USERPROFILE%%\Anaconda3"
REG ADD HKCR\Directory\shell\Anaconda\ /ve /f /d "Anaconda Prompt Here"
REG ADD HKCR\Directory\shell\Anaconda\ /v Icon /f /t REG_EXPAND_SZ /d %%USERPROFILE%%\\Anaconda3\\Menu\\Iconleak-Atrous-Console.ico
REG ADD HKCR\Directory\shell\Anaconda\command /f /ve /t REG_EXPAND_SZ /d "%windir%\System32\cmd.exe pushd "%V" "/K" %%USERPROFILE%%\Anaconda3\Scripts\activate.bat %%USERPROFILE%%\Anaconda3"

Answer 3

UPDATE: The answer by Filip S. might work better on more recent versions of Anaconda.
ANOTHER UPDATE: I fixed an issue with using this launcher in the drive root (e.g. C:\ or D:\). It's very minor: some whitespace has been added to the registry entry (relevant part: "%V ") so that the trailing backslash does not confuse Windows.
Original post
I also wanted this functionality, so I made it.
The key steps are outlined below, with the explanation further down.
Solution
Warning: Do not proceed unless you are comfortable editing the registry and are using a non-production system. And obviously don't run everything I tell you to, check that it's not doing anything nefarious. You don't know me!
1. Modify the Anaconda script that sets the working directory
Find the Anaconda script cwp.py (mine was in C:\Users\bdforbes\Anaconda3\) and copy it to cwp2.py in the same directory.
Modify cwp2.py to accept a target path as the second argument and change to that directory:
prefix = sys.argv[1]
cwd = sys.argv[2]
args = sys.argv[3:]
... (PATH setting code)
(REMOVE OLD LOGIC THAT CALLED os.chdir)
os.chdir(cwd)
sys.exit(subprocess.call(args, env=env))
Full code here: https://gist.github.com/bdforbes/9ef59cd01c22acefc20c5c92bd9550ae
2. Add the registry keys
In the registry, go to HKEY_CLASSES_ROOT\Directory\Background\shell\ and add a key Anaconda with default value "Open Anaconda Prompt Here", with a sub-key command with the following default value:
C:\Users\bdforbes\Anaconda3\pythonw.exe C:\Users\bdforbes\Anaconda3\cwp2.py C:\Users\bdforbes\Anaconda3 "%V " cmd.exe "/K" C:\Users\bdforbes\Anaconda3\Scripts\activate.bat C:\Users\bdforbes\Anaconda3
Add the same entries to HKEY_CLASSES_ROOT\Directory\shell\.
I've put a .reg file here, you just need to search replace bdforbes and replace it with your Windows account name. Don't run a .reg file without checking it first!
3. Use your fancy new context menu item
Right click on a folder. You should see the new entry there which will let you open a new Anaconda prompt.