add build_on_save_step config option

This allows selecting which step should be executed when running
build-on-save like `zig build install`, `zig build test`, etc.

README.md

@@ -60,6 +60,7 @@ The following options are currently available.
 | `enable_argument_placeholders` | `bool` | `true` | Whether to enable function argument placeholder completions |
 | `enable_ast_check_diagnostics` | `bool` | `true` | Whether to enable ast-check diagnostics |
 | `enable_build_on_save` | `bool` | `false` | Whether to enable build-on-save diagnostics |
+| `build_on_save_step` | `[]const u8` | `"install"` | Select which step should be executed on build-on-save |
 | `enable_autofix` | `bool` | `false` | Whether to automatically fix errors on save. Currently supports adding and removing discards. |
 | `semantic_tokens` | `enum` | `.full` | Set level of semantic tokens. Partial only includes information that requires semantic analysis. |
 | `enable_inlay_hints` | `bool` | `true` | Enables inlay hint support when the client also supports it |

schema.json

@@ -24,6 +24,11 @@
             "type": "boolean",
             "default": "false"
         },
+        "build_on_save_step": {
+            "description": "Select which step should be executed on build-on-save",
+            "type": "string",
+            "default": "\"install\""
+        },
         "enable_autofix": {
             "description": "Whether to automatically fix errors on save. Currently supports adding and removing discards.",
             "type": "boolean",

src/Config.zig

@@ -16,6 +16,9 @@ enable_ast_check_diagnostics: bool = true,
 /// Whether to enable build-on-save diagnostics
 enable_build_on_save: bool = false,
 
+/// Select which step should be executed on build-on-save
+build_on_save_step: []const u8 = "install",
+
 /// Whether to automatically fix errors on save. Currently supports adding and removing discards.
 enable_autofix: bool = false,
 

src/config_gen/config.json

@@ -24,6 +24,12 @@
             "type": "bool",
             "default": "false"
         },
+        {
+            "name": "build_on_save_step",
+            "description": "Select which step should be executed on build-on-save",
+            "type": "[]const u8",
+            "default": "\"install\""
+        },
         {
             "name": "enable_autofix",
             "description": "Whether to automatically fix errors on save. Currently supports adding and removing discards.",

src/features/diagnostics.zig

@@ -225,6 +225,7 @@ pub fn generateBuildOnSaveDiagnostics(
     const base_args = &[_][]const u8{
         server.config.zig_exe_path orelse return,
         "build",
+        server.config.build_on_save_step,
         "--zig-lib-dir",
         server.config.zig_lib_path orelse return,
         "--cache-dir",