Feat/add uv as pypi source

README.md

@@ -252,6 +252,10 @@ local DEFAULT_SETTINGS = {
         -- Whether to upgrade pip to the latest version in the virtual environment before installing packages.
         upgrade_pip = false,
 
+        ---@since 1.8.0
+        -- Whether to use uv to install packages instead of pip
+        use_uv      = 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.

doc/mason.txt

@@ -314,6 +314,10 @@ Example:
             -- Whether to upgrade pip to the latest version in the virtual environment before installing packages.
             upgrade_pip = false,
 
+            ---@since 1.8.0
+            -- Whether to use uv to install packages instead of pip
+            use_uv      = 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.

lua/mason-core/installer/managers/pypi.lua

@@ -9,11 +9,18 @@ local pep440 = require "mason-core.pep440"
 local platform = require "mason-core.platform"
 local providers = require "mason-core.providers"
 local semver = require "mason-core.semver"
+local settings = require "mason.settings"
 local spawn = require "mason-core.spawn"
 
 local M = {}
 
-local VENV_DIR = "venv"
+local use_uv = settings.current.pip.use_uv
+local VENV_DIR
+if use_uv then
+    VENV_DIR = ".venv"
+else
+    VENV_DIR = "venv"
+end
 
 ---@async
 ---@param candidates string[]
@@ -22,11 +29,20 @@ local function resolve_python3(candidates)
     a.scheduler()
     local available_candidates = _.filter(is_executable, candidates)
     for __, candidate in ipairs(available_candidates) do
-        ---@type string
-        local version_output = spawn[candidate]({ "--version" }):map(_.prop "stdout"):get_or_else ""
-        local ok, version = pcall(semver.new, version_output:match "Python (3%.%d+.%d+)")
-        if ok then
-            return { executable = candidate, version = version }
+        if use_uv and candidate == "uv" then
+            ---@type string
+            local version_output = spawn[candidate]({ "--version" }):map(_.prop "stdout"):get_or_else ""
+            local ok, version = pcall(semver.new, version_output:match "uv (%d+.%d+.%d+).*")
+            if ok then
+                return { executable = candidate, version = version }
+            end
+        elseif not use_uv then
+            ---@type string
+            local version_output = spawn[candidate]({ "--version" }):map(_.prop "stdout"):get_or_else ""
+            local ok, version = pcall(semver.new, version_output:match "Python (3%.%d+.%d+)")
+            if ok then
+                return { executable = candidate, version = version }
+            end
         end
     end
     return nil
@@ -76,14 +92,14 @@ local function create_venv(pkg)
     local supported_python_versions = providers.pypi.get_supported_python_versions(pkg.name, pkg.version):get_or_nil()
 
     -- 1. Resolve stock python3 installation.
-    local stock_candidates = platform.is.win and { "python", "python3" } or { "python3", "python" }
+    local stock_candidates = platform.is.win and { "python", "python3", "uv" } or { "python3", "python", "uv" }
     local stock_target = resolve_python3(stock_candidates)
     if stock_target then
         log.fmt_debug("Resolved stock python3 installation version %s", stock_target.version)
     end
 
     -- 2. Resolve suitable versioned python3 installation (python3.12, python3.11, etc.).
-    local versioned_candidates = {}
+    local versioned_candidates = { "uv" }
     if supported_python_versions ~= nil then
         if stock_target and not pep440_check_version(tostring(stock_target.version), supported_python_versions) then
             log.fmt_debug("Finding versioned candidates for %s", supported_python_versions)
@@ -103,7 +119,8 @@ local function create_venv(pkg)
     -- 3. If a versioned python3 installation was not found, warn the user if the stock python3 installation is outside
     -- the supported version range.
     if
-        target == stock_target
+        use_uv == false
+        and target == stock_target
         and supported_python_versions ~= nil
         and not pep440_check_version(tostring(target.version), supported_python_versions)
     then
@@ -125,9 +142,14 @@ local function create_venv(pkg)
         end
     end
 
-    log.fmt_debug("Found python3 installation version=%s, executable=%s", target.version, target.executable)
     ctx.stdio_sink.stdout "Creating virtual environment…\n"
-    return ctx.spawn[target.executable] { "-m", "venv", "--system-site-packages", VENV_DIR }
+    if use_uv then
+        log.fmt_debug("Found uv installation version=%s, executable=%s", target.version, target.executable)
+        return ctx.spawn[target.executable] { "venv", VENV_DIR }
+    else
+        log.fmt_debug("Found python3 installation version=%s, executable=%s", target.version, target.executable)
+        return ctx.spawn[target.executable] { "-m", "venv", "--system-site-packages", VENV_DIR }
+    end
 end
 
 ---@param ctx InstallContext
@@ -153,6 +175,9 @@ end
 ---@param args SpawnArgs
 local function venv_python(args)
     local ctx = installer.context()
+    if use_uv then
+        return ctx.spawn[{ "uv", "venv" }](args)
+    end
     return find_venv_executable(ctx, "python"):and_then(function(python_path)
         return ctx.spawn[path.concat { ctx.cwd:get(), python_path }](args)
     end)
@@ -162,16 +187,29 @@ end
 ---@param pkgs string[]
 ---@param extra_args? string[]
 local function pip_install(pkgs, extra_args)
-    return venv_python {
-        "-m",
-        "pip",
-        "--disable-pip-version-check",
-        "install",
-        "--ignore-installed",
-        "-U",
-        extra_args or vim.NIL,
-        pkgs,
-    }
+    if use_uv then
+        local ctx = installer.context()
+
+        local task = ctx.spawn["uv"] {
+            "pip",
+            "install",
+            "-U",
+            extra_args or vim.NIL,
+            pkgs,
+        }
+        return task
+    else
+        return venv_python {
+            "-m",
+            "pip",
+            "--disable-pip-version-check",
+            "install",
+            "--ignore-installed",
+            "-U",
+            extra_args or vim.NIL,
+            pkgs,
+        }
+    end
 end
 
 ---@async
@@ -185,7 +223,7 @@ function M.init(opts)
         ctx:promote_cwd()
         try(create_venv(opts.package))
 
-        if opts.upgrade_pip then
+        if opts.upgrade_pip and not use_uv then
             ctx.stdio_sink.stdout "Upgrading pip inside the virtual environment…\n"
             try(pip_install({ "pip" }, opts.install_extra_args))
         end

lua/mason-core/installer/registry/providers/pypi.lua

@@ -27,6 +27,7 @@ function M.parse(source, purl)
             pip = {
                 upgrade = settings.current.pip.upgrade_pip,
                 extra_args = settings.current.pip.install_args,
+                use_uv = settings.current.pip.use_uv,
             },
         }
 
@@ -48,11 +49,13 @@ function M.install(ctx, source)
             },
             upgrade_pip = source.pip.upgrade,
             install_extra_args = source.pip.extra_args,
+            use_uv = source.pip.use_uv,
         })
         try(pypi.install(source.package, source.version, {
             extra = source.extra,
             extra_packages = source.extra_packages,
             install_extra_args = source.pip.extra_args,
+            use_uv = source.pip.use_uv,
         }))
     end)
 end

lua/mason/settings.lua

@@ -60,6 +60,10 @@ local DEFAULT_SETTINGS = {
         -- Whether to upgrade pip to the latest version in the virtual environment before installing packages.
         upgrade_pip = false,
 
+        ---@since 1.8.0
+        -- Whether to use uv to install packages instead of pip
+        use_uv = 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.

tests/mason-core/installer/registry/providers/pypi_spec.lua

@@ -31,6 +31,7 @@ describe("pypi provider :: parsing", function()
                 pip = {
                     upgrade = true,
                     extra_args = { "--proxy", "http://localghost" },
+                    use_uv = false,
                 },
             },
             pypi.parse({ extra_packages = { "extra" } }, purl())