fix(pypi): allow access to system site packages by default (#1584)

Co-authored-by: William Boman <[email protected]>

Author: BlueDrink9

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

@@ -125,7 +125,7 @@ local function create_venv(pkg)
 
     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", VENV_DIR }
+    return ctx.spawn[target.executable] { "-m", "venv", "--system-site-packages", VENV_DIR }
 end
 
 ---@param ctx InstallContext
@@ -165,6 +165,7 @@ local function pip_install(pkgs, extra_args)
         "pip",
         "--disable-pip-version-check",
         "install",
+        "--ignore-installed",
         "-U",
         extra_args or vim.NIL,
         pkgs,

tests/mason-core/installer/managers/pypi_spec.lua

@@ -38,6 +38,7 @@ describe("pypi manager", function()
         assert.spy(ctx.spawn.python3).was_called_with {
             "-m",
             "venv",
+            "--system-site-packages",
             "venv",
         }
     end)
@@ -62,6 +63,7 @@ describe("pypi manager", function()
         assert.spy(ctx.spawn.python3).was_called_with {
             "-m",
             "venv",
+            "--system-site-packages",
             "venv",
         }
         assert.spy(ctx.spawn[venv_py(ctx)]).was_called(1)
@@ -70,6 +72,7 @@ describe("pypi manager", function()
             "pip",
             "--disable-pip-version-check",
             "install",
+            "--ignore-installed",
             "-U",
             { "--proxy", "http://localhost" },
             { "pip" },
@@ -188,6 +191,7 @@ describe("pypi manager", function()
             "pip",
             "--disable-pip-version-check",
             "install",
+            "--ignore-installed",
             "-U",
             vim.NIL, -- install_extra_args
             {
@@ -227,6 +231,7 @@ describe("pypi manager", function()
             "pip",
             "--disable-pip-version-check",
             "install",
+            "--ignore-installed",
             "-U",
             vim.NIL, -- install_extra_args
             {
@@ -253,6 +258,7 @@ describe("pypi manager", function()
             "pip",
             "--disable-pip-version-check",
             "install",
+            "--ignore-installed",
             "-U",
             { "--proxy", "http://localhost:9000" },
             {