mozconfigwrapper

Mozconfigwrapper is a Python + shell tool to manager your mozconfigs. Mozconfigwrapper hides all your mozconfigs away in a configurable directory (defaults to ~/.mozconfigs) and allows you to easily create, switch, delete and edit them. Mozconfigs remain active across shell sessions.

Installation

Mozconfigwrapper is on PyPi as the mozconfigwrapper pacakge. The recommended method to install it is via uv:

uv tool install mozconfigwrapper

Then open your ~/.bashrc file (or equivalent) and add the line:

source $(which mozconfigwrapper.sh)

Finally run:

source ~/.bashrc

Usage

You can create, remove, switch, list and edit mozconfigs.

To build with (activate) a mozconfig named foo, run:

buildwith foo

To create a mozconfig named foo, run:

mkmozconfig foo

To delete a mozconfig named foo, run:

rmmozconfig foo

To see the currently active mozconfig, run:

mozconfig

To list all mozconfigs, run:

mozconfig -l

To edit the currently active mozconfig, run (the $EDITOR variable must be set):

mozconfig -e

Configuration

mozconfig location

By default mozconfigs are stored in the ~/.mozconfigs directory, but you can override this by setting the $BUILDWITH_HOME environment variable. e.g, add:

export BUILDWITH_HOME=~/my/custom/mozconfig/path

to your ~/.bashrc file (or equivalent).

buildwith command

When running the buildwith command, export MOZCONFIG=<path to mozconfig> is run by default. You can use any other command by overriding the BUILDWITH_COMMAND environment variable. For example, if you put this in your ~/.bashrc file (or equivalent):

export BUILDWITH_COMMAND="export MOZCONFIG=#1 && launchctl setenv MOZCONFIG #1"

buildwith will also set the MOZCONFIG environment variable in launchctl (useful when running Android Studio). All occurences of #1 will be replaced by the path to the mozconfig file.

prompt prefix

Similar to Python virtualenvs, you can display the active mozconfig name as a prefix in your shell prompt. This prefix only appears when you are inside a gecko repository. To enable this feature, add to your ~/.bashrc file (or equivalent):

export BUILDWITH_SHOW_PROMPT=1

The default format is (mozconfig_name) but you can customize it with:

export BUILDWITH_PROMPT_FORMAT="[%s] "

The %s will be replaced with the mozconfig name. For example, if you activate a config named "debug" while inside a gecko repository, your prompt will show (debug) or [debug] depending on your format setting.

The prompt automatically appears when you cd into a gecko repository and disappears when you leave it. Gecko repositories are detected by the presence of mach or moz.configure files.

mozconfig template

When you make a new mozconfig, it will be populated with some basic build commands and the name of the mozconfig will be appended to the end of the OBJDIR instruction. You can modify what gets populated by default by editing the ~/.mozconfigs/.template file. For example, if I wanted my default configuration to store object directories in a folder called objdirs and enable debugging and tests, I'd edit the ~/.mozconfigs/.template file to look like:

mk_add_options MOZ_OBJDIR=@TOPSRCDIR@/objdirs/
ac_add_options --enable-application=browser
ac_add_options --enable-debug
ac_add_options --enable-tests

Now if I ran the command 'mkmozconfig foo', foo would be populated with the above and have the word 'foo' appended to the first line.