*mason.nvim*
Minimum version of neovim: 0.10.0
Author: William Boman
*mason-help-guide*
Type |gO| to see the table of contents.
Press |K| on a helptag to jump to it: |mason-help-guide|
==============================================================================
INTRODUCTION *mason-introduction*
`mason.nvim` is a Neovim plugin that allows you to easily manage external
editor tooling such as LSP servers, DAP servers, linters, and formatters
through a single interface. It runs everywhere Neovim runs (across Linux,
macOS, Windows, etc.), with only a small set of external requirements needed.
Packages are installed in Neovim's data directory (`:h standard-path`) by
default. Executables are linked to a single `bin/` directory, which
`mason.nvim` will add to Neovim's PATH during setup, allowing seamless access
from Neovim builtins (shell, terminal, etc.) as well as other 3rd party
plugins.
==============================================================================
REQUIREMENTS *mason-requirements*
`mason.nvim` relaxes the minimum requirements by attempting multiple different
utilities (for example, `wget`, `curl`, and `Invoke-WebRequest` are all
perfect substitutes). The _minimum_ recommended requirements are:
- neovim `>= 0.10.0`
- For Unix systems: `git(1)`, `curl(1)` or `wget(1)`, `unzip(1)`, `tar(1)`,
`gzip(1)`
- For Windows systems: pwsh or powershell, git, tar, and 7zip or peazip or
archiver or winzip or WinRAR
Note that Mason will regularly shell out to external package managers,
such as `cargo` and `npm`. Depending on your personal usage, some of these
will also need to be installed. Refer to `:checkhealth mason` for a full list.
==============================================================================
QUICK START *mason-quickstart*
-----------------
SETTING UP MASON.NVIM
First you'll need to set up Mason. This is done by calling the `setup()`
function:
>lua
require("mason").setup()
<
Mason will do the following during setup:
1) add Mason's `bin/` directory to the Neovim session's PATH
2) register commands (|mason-commands|)
Refer to |mason-settings| for all available settings.
-----------------
INSTALLING PACKAGES
Install a package via |:MasonInstall|, for example:
>vim
:MasonInstall stylua
<
You may also install multiple packages at a time:
>vim
:MasonInstall stylua lua-language-server
<
To install a specific version of a package, you may provide it as part of the
package name, like so:
>vim
:MasonInstall rust-analyzer@nightly
<
Please refer to each package's own release pages to find which versions are
available.
You may also install packages in headless mode. This will run the command in
blocking mode and the command won't yield back until all packages have
finished installing:
>sh
$ nvim --headless -c "MasonInstall lua-language-server rust-analyzer" -c qall
<
Note: ~
You may also use Mason's Lua API to programmatically manage package
installations. Through this interface you will also gain access to more
features to allow further customization.
-----------------
THE MASON WINDOW
To view the UI for mason, run: >vim
:Mason
<
Through this UI you may explore which packages that are available, see which
installed packages have new versions available, install, uninstall, or update
packages, expand package information, and more. The UI comes with a set of
keybinds which you may find in the help view by pressing `g?` when the Mason
window is open.
==============================================================================
REGISTRIES *mason-registries*
`mason.nvim` sources package definitions from the registries it has been
configured with (see |mason-settings|). `mason.nvim` uses the core registry,
governed by `mason.nvim`, by default. This may be extended, or even entirely
overridden, through additional registries, like so:
>lua
require("mason").setup {
registries = {
"lua:my-registry",
"github:mason-org/mason-registry",
},
}
<
Packages are loaded from registries in the order they've been configured,
with registries appearing first in the list having precedence.
==============================================================================
HOW TO INSTALL PACKAGES *mason-how-to-install-packages*
You may install packages either via the command interface or via Mason's Lua
APIs. See |:MasonInstall| for more details.
==============================================================================
HOW TO USE PACKAGES *mason-how-to-use-packages*
Although many packages are perfectly usable out of the box through Neovim
builtins, it is recommended to use other 3rd party plugins to further
integrate these.
See also ~
Execute external commands: |:!cmd|.
Launch an embedded terminal: |terminal|.
Launch background jobs: |jobstart| & |uv.spawn()| (via |vim.loop|)
==============================================================================
COMMANDS *mason-commands*
------------------------------------------------------------------------------
OPEN THE MASON WINDOW *:Mason*
:Mason
Opens the graphical status window.
Through this UI you may explore which packages that are available, see which
installed packages have new versions available, install, uninstall, or update
packages, expand package information, and more. The UI comes with a set of
keybinds which you may find in the help view by pressing `g?` when the Mason
window is open.
------------------------------------------------------------------------------
UPDATE REGISTRIES *:MasonUpdate*
>vim
:MasonUpdate
<
Updates all managed registries.
------------------------------------------------------------------------------
INSTALLING PACKAGES *:MasonInstall*
>vim
:MasonInstall <package> ...
<
Installs the provided packages. Packages may include a version specifier,
like so:
>vim
:MasonInstall lua-language-server@v3.0.0
<
Runs in blocking fashion if there are no UIs attached (i.e. running in
headless mode):
>sh
$ nvim --headless -c "MasonInstall stylua" -c "qall"
<
------------------------------------------------------------------------------
UNINSTALLING PACKAGES *:MasonUninstall*
>vim
:MasonUninstall <package> ...
<
Uninstalls the provided packages.
------------------------------------------------------------------------------
UNINSTALLING ALL PACKAGES *:MasonUninstallAll*
>vim
:MasonUninstallAll
<
Uninstalls all installed packages.
------------------------------------------------------------------------------
VIEW THE MASON LOG *:MasonLog*
>vim
:MasonLog
<
Opens the log file in a new tab window.
==============================================================================
SETTINGS *mason-settings*
You can configure certain behavior of mason when calling the `.setup()`
function.
Refer to the |mason-default-settings| for all available settings.
Example:
>lua
require("mason").setup({
ui = {
icons = {
package_installed = "✓",
package_pending = "➜",
package_uninstalled = "✗"
}
}
})
<
*mason-default-settings*
>lua
---@class MasonSettings
local DEFAULT_SETTINGS = {
---@since 1.0.0
-- The directory in which to install packages.
install_root_dir = path.concat { vim.fn.stdpath "data", "mason" },
---@since 1.0.0
-- Where Mason should put its bin location in your PATH. Can be one of:
-- - "prepend" (default, Mason's bin location is put first in PATH)
-- - "append" (Mason's bin location is put at the end of PATH)
-- - "skip" (doesn't modify PATH)
---@type '"prepend"' | '"append"' | '"skip"'
PATH = "prepend",
---@since 1.0.0
-- Controls to which degree logs are written to the log file. It's useful to set this to vim.log.levels.DEBUG when
-- debugging issues with package installations.
log_level = vim.log.levels.INFO,
---@since 1.0.0
-- Limit for the maximum amount of packages to be installed at the same time. Once this limit is reached, any further
-- packages that are requested to be installed will be put in a queue.
max_concurrent_installers = 4,
---@since 1.0.0
-- [Advanced setting]
-- The registries to source packages from. Accepts multiple entries. Should a package with the same name exist in
-- multiple registries, the registry listed first will be used.
registries = {
"github:mason-org/mason-registry",
},
---@since 1.0.0
-- The provider implementations to use for resolving supplementary package metadata (e.g., all available versions).
-- Accepts multiple entries, where later entries will be used as fallback should prior providers fail.
-- Builtin providers are:
-- - mason.providers.registry-api - uses the https://api.mason-registry.dev API
-- - mason.providers.client - uses only client-side tooling to resolve metadata
providers = {
"mason.providers.registry-api",
"mason.providers.client",
},
github = {
---@since 1.0.0
-- The template URL to use when downloading assets from GitHub.
-- The placeholders are the following (in order):
-- 1. The repository (e.g. "rust-lang/rust-analyzer")
-- 2. The release version (e.g. "v0.3.0")
-- 3. The asset name (e.g. "rust-analyzer-v0.3.0-x86_64-unknown-linux-gnu.tar.gz")
download_url_template = "https://github.com/%s/releases/download/%s/%s",
},
pip = {
---@since 1.0.0
-- Whether to upgrade pip to the latest version in the virtual environment before installing packages.
upgrade_pip = false,
---@since 1.0.0
-- These args will be added to `pip install` calls. Note that setting extra args might impact intended behavior
-- and is not recommended.
--
-- Example: { "--proxy", "https://proxyserver" }
install_args = {},
},
ui = {
---@since 1.0.0
-- Whether to automatically check for new versions when opening the :Mason window.
check_outdated_packages_on_open = true,
---@since 1.0.0
-- The border to use for the UI window. Accepts same border values as |nvim_open_win()|.
-- Defaults to `:h 'winborder'` if nil.
border = nil,
---@since 1.11.0
-- The backdrop opacity. 0 is fully opaque, 100 is fully transparent.
backdrop = 60,
---@since 1.0.0
-- Width of the window. Accepts:
-- - Integer greater than 1 for fixed width.
-- - Float in the range of 0-1 for a percentage of screen width.
width = 0.8,
---@since 1.0.0
-- Height of the window. Accepts:
-- - Integer greater than 1 for fixed height.
-- - Float in the range of 0-1 for a percentage of screen height.
height = 0.9,
icons = {
---@since 1.0.0
-- The list icon to use for installed packages.
package_installed = "◍",
---@since 1.0.0
-- The list icon to use for packages that are installing, or queued for installation.
package_pending = "◍",
---@since 1.0.0
-- The list icon to use for packages that are not installed.
package_uninstalled = "◍",
},
keymaps = {
---@since 1.0.0
-- Keymap to expand a package
toggle_package_expand = "<CR>",
---@since 1.0.0
-- Keymap to install the package under the current cursor position
install_package = "i",
---@since 1.0.0
-- Keymap to reinstall/update the package under the current cursor position
update_package = "u",
---@since 1.0.0
-- Keymap to check for new version for the package under the current cursor position
check_package_version = "c",
---@since 1.0.0
-- Keymap to update all installed packages
update_all_packages = "U",
---@since 1.0.0
-- Keymap to check which installed packages are outdated
check_outdated_packages = "C",
---@since 1.0.0
-- Keymap to uninstall a package
uninstall_package = "X",
---@since 1.0.0
-- Keymap to cancel a package installation
cancel_installation = "<C-c>",
---@since 1.0.0
-- Keymap to apply language filter
apply_language_filter = "<C-f>",
---@since 1.1.0
-- Keymap to toggle viewing package installation log
toggle_package_install_log = "<CR>",
---@since 1.8.0
-- Keymap to toggle the help view
toggle_help = "g?",
},
},
}
<
==============================================================================
DOWNLOAD MIRRORS *mason-download-mirrors*
------------------------------------------------------------------------------
GITHUB MIRROR *mason-download-mirror-github*
It's possible to customize the download URL used when downloading assets
from GitHub releases by setting the `github.download_url_template`
settings during setup, like so:
>lua
require("mason").setup {
github = {
-- The template URL to use when downloading assets from GitHub.
-- The placeholders are the following (in order):
-- 1. The repository (e.g. "rust-lang/rust-analyzer")
-- 2. The release version (e.g. "v0.3.0")
-- 3. The asset name (e.g. "rust-analyzer-v0.3.0-x86_64-unknown-linux-gnu.tar.gz")
download_url_template = "https://my.mirror.com/%s/releases/download/%s/%s",
},
}
<
==============================================================================
INSTALLATION ERRORS *mason-errors*
*mason-provider-errors*
By default, Mason uses the api.mason-registry.dev API to resolve package
metadata. Calling this service may result in network errors on some networks
(e.g., SSL issues on corporate VPNs). If resolving the SSL error is not an
option, you will have to change the provider implementation. Mason provides a
client provider which calls underlying 3rd party service APIs directly, which
you can enable like so:
>lua
require("mason").setup {
providers = {
"mason.providers.client",
"mason.providers.registry-api",
}
}
<
Note: ~
The client provider have less overall coverage and may come with
additional performance penalties (spawning slow commands, network &
parsing overheads, etc.).
==============================================================================
DEBUGGING *mason-debugging*
To help with debugging issues with installing/uninstalling packages, please
make sure to set mason's log level to DEBUG or TRACE, like so:
>lua
require("mason").setup {
log_level = vim.log.levels.DEBUG
}
<
You may find the logs by entering the command `:MasonLog`. Providing the
contents of this file when reporting an issue will help tremendously. Remember
to redo whatever is failing after changing the log level in order to capture
new log entries.
==============================================================================
Lua module: "mason"
>lua
require("mason")
<
*mason.setup()*
setup({config})
Sets up mason with the provided {config} (see |mason-settings|).
==============================================================================
Lua module: "mason-registry"
>lua
require("mason-registry")
<
*mason-registry.is_installed()*
is_installed({package_name})
Checks whether the provided package name is installed. In many situations,
this is a more efficient option than the Package:is_installed() method due
to a smaller amount of modules required to load.
Parameters:
{package_name} - string
Returns:
boolean
*mason-registry.get_package()*
get_package({package_name})
Returns an instance of the Package class if the provided package name
exists.
This function errors if a package cannot be found.
Parameters:
{package_name} - string
Returns:
Package
*mason-registry.has_package()*
has_package({package_name})
Returns true if the provided package_name can be found in the registry.
Parameters:
{package_name} - string
Returns:
boolean
*mason-registry.get_installed_packages()*
get_installed_packages()
Returns all installed package instances. This is a slower function that
loads more modules.
Returns:
Package[]
*mason-registry.get_installed_package_names()*
get_installed_package_names()
Returns all installed package names. This is a fast function that doesn't
load any extra modules.
Returns:
string[]
*mason-registry.get_all_packages()*
get_all_packages()
Returns all package instances. This is a slower function that loads more
modules.
Returns:
Package[]
*mason-registry.get_all_package_names()*
get_all_package_names()
Returns all package names. This is a faster function than
|mason-registry.get_all_packages()| because it loads fewer modules.
Returns:
string[]
*mason-registry.get_all_package_specs()*
get_all_package_specs()
Returns all package specifications. This is a faster function than
|mason-registry.get_all_packages()| because it loads fewer modules.
Returns:
RegistryPackageSpec[]
*mason-registry.update()*
update({callback})
Updates all managed registries.
Parameters:
{callback} - Callback of the signature `fun(success: boolean, updated_registries: RegistrySource[])`
*mason-registry.refresh()*
refresh({callback?})
Refreshes all registries if needed. This is a convenience wrapper around
|mason-registry.update()| that only updates registries if:
1) registries haven't been updated in a while
2) or, one or more registries are not installed
Runs in a blocking fashion if no {callback} is provided. Note that when
running in blocking fashion the entire editor is frozen, so prefer the
asynchronous variant unless absolutely needed.
Parameters:
{callback?} (optional) - Invoked when the registry has been refreshed.
Example:
>lua
local registry = require("mason-registry")
-- 1. synchronous
registry.refresh()
local packages = registry.get_all_packages()
...
-- 2. asynchronous
registry.refresh(function ()
local packages = registry.get_all_packages()
...
end)
<
vim:tw=78:ft=help:norl:expandtab:sw=4
