ast-check for zls!
This commit is contained in:
Auguste Rame
parent
da03c81992
commit
57a35a7bc8
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@ -9,8 +9,8 @@
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"type": "boolean",
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"default": "false"
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},
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"enable_unused_variable_warnings": {
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"description": "Enables warnings for local variables that aren't used",
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"enable_ast_check_diagnostics": {
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"description": "Whether to enable ast-check diagnostics",
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"type": "boolean",
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"default": "false"
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},
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@ -13,8 +13,8 @@ const logger = std.log.scoped(.config);
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/// Whether to enable snippet completions
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enable_snippets: bool = false,
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/// Whether to enable unused variable warnings
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enable_unused_variable_warnings: bool = false,
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/// Whether to enable ast-check diagnostics
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enable_ast_check_diagnostics: bool = false,
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/// Whether to enable import/embedFile argument completions (NOTE: these are triggered manually as updating the autotrigger characters may cause issues)
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enable_import_embedfile_argument_completions: bool = false,
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134
src/Server.zig
134
src/Server.zig
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@ -237,72 +237,82 @@ fn publishDiagnostics(server: *Server, writer: anytype, handle: DocumentStore.Ha
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});
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}
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if (server.config.enable_unused_variable_warnings) {
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scopes: for (handle.document_scope.scopes.items) |scope| {
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const scope_data = switch (scope.data) {
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.function => |f| b: {
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if (!ast.fnProtoHasBody(tree, f).?) continue :scopes;
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break :b f;
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},
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.block => |b| b,
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else => continue,
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if (server.config.enable_ast_check_diagnostics) diag: {
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if (server.config.zig_exe_path) |zig_exe_path| {
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var process = std.ChildProcess.init(&[_][]const u8{ zig_exe_path, "ast-check", "--color", "off" }, server.allocator);
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process.stdin_behavior = .Pipe;
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process.stderr_behavior = .Pipe;
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process.spawn() catch |err| {
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Logger.warn(server, writer, "Failed to spawn zig fmt process, error: {}", .{err});
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break :diag;
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};
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try process.stdin.?.writeAll(handle.document.text);
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process.stdin.?.close();
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var decl_iterator = scope.decls.iterator();
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while (decl_iterator.next()) |decl| {
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var identifier_count: usize = 0;
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process.stdin = null;
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const name_token_index = switch (decl.value_ptr.*) {
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.ast_node => |an| s: {
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const an_tag = tree.nodes.items(.tag)[an];
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switch (an_tag) {
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.simple_var_decl => {
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break :s tree.nodes.items(.main_token)[an] + 1;
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},
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else => continue,
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const stderr_bytes = try process.stderr.?.reader().readAllAlloc(server.allocator, std.math.maxInt(usize));
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defer server.allocator.free(stderr_bytes);
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switch (try process.wait()) {
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.Exited => {
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// NOTE: I believe that with color off it's one diag per line; is this correct?
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var line_iterator = std.mem.split(u8, stderr_bytes, "\n");
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while (line_iterator.next()) |line| lin: {
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var pos_and_diag_iterator = std.mem.split(u8, line, ":");
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const maybe_first = pos_and_diag_iterator.next();
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if (maybe_first) |first| {
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if (first.len <= 1) break :lin;
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} else break;
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const pos = types.Position{
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.line = (try std.fmt.parseInt(i64, pos_and_diag_iterator.next().?, 10)) - 1,
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.character = (try std.fmt.parseInt(i64, pos_and_diag_iterator.next().?, 10)) - 1,
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};
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const msg = pos_and_diag_iterator.rest()[1..];
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if (std.mem.startsWith(u8, msg, "error: ")) {
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try diagnostics.append(allocator, .{
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.range = .{ .start = pos, .end = pos },
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.severity = .Error,
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.code = "ast_check",
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.source = "zls",
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.message = try server.arena.allocator().dupe(u8, msg["error: ".len..]),
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});
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} else if (std.mem.startsWith(u8, msg, "note: ")) {
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var latestDiag = &diagnostics.items[diagnostics.items.len - 1];
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var fresh = if (latestDiag.relatedInformation.len == 0)
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try server.arena.allocator().alloc(types.DiagnosticRelatedInformation, 1)
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else
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try server.arena.allocator().realloc(@ptrCast([]types.DiagnosticRelatedInformation, latestDiag.relatedInformation), latestDiag.relatedInformation.len + 1);
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const location = types.Location{
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.uri = handle.uri(),
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.range = .{ .start = pos, .end = pos },
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};
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fresh[fresh.len - 1] = .{
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.location = location,
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.message = try server.arena.allocator().dupe(u8, msg["note: ".len..]),
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};
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latestDiag.relatedInformation = fresh;
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} else {
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try diagnostics.append(allocator, .{
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.range = .{ .start = pos, .end = pos },
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.severity = .Error,
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.code = "ast_check",
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.source = "zls",
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.message = try server.arena.allocator().dupe(u8, msg),
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});
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}
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},
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.param_decl => |param| param.name_token orelse continue,
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else => continue,
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};
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if (std.mem.eql(u8, tree.tokenSlice(name_token_index), "_"))
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continue;
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const pit_start = tree.firstToken(scope_data);
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const pit_end = ast.lastToken(tree, scope_data);
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const tags = tree.tokens.items(.tag)[pit_start..pit_end];
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for (tags) |tag, index| {
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if (tag != .identifier) continue;
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if (!std.mem.eql(u8, tree.tokenSlice(pit_start + @intCast(u32, index)), tree.tokenSlice(name_token_index))) continue;
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if (index -| 1 > 0 and tags[index - 1] == .period) continue;
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if (index +| 2 < tags.len and tags[index + 1] == .colon) switch (tags[index + 2]) {
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.l_brace,
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.keyword_inline,
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.keyword_while,
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.keyword_for,
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.keyword_switch,
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=> continue,
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else => {},
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};
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if (index -| 2 > 0 and tags[index - 1] == .colon) switch (tags[index - 2]) {
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.keyword_break,
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.keyword_continue,
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=> continue,
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else => {},
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};
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identifier_count += 1;
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}
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if (identifier_count <= 1)
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try diagnostics.append(allocator, .{
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.range = astLocationToRange(tree.tokenLocation(0, name_token_index)),
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.severity = .Error,
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.code = "unused_variable",
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.source = "zls",
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.message = "Unused variable; either remove the variable or use '_ = ' on the variable to bypass this error",
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});
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}
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},
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else => {},
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}
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}
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}
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@ -276,7 +276,7 @@ pub const Configuration = struct {
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params: struct {
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settings: struct {
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enable_snippets: ?bool,
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enable_unused_variable_warnings: ?bool,
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enable_ast_check_diagnostics: ?bool,
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enable_import_embedfile_argument_completions: ?bool,
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zig_lib_path: ?[]const u8,
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zig_exe_path: ?[]const u8,
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@ -108,12 +108,18 @@ pub const DiagnosticSeverity = enum(i64) {
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}
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};
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pub const DiagnosticRelatedInformation = struct {
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location: Location,
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message: string,
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};
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pub const Diagnostic = struct {
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range: Range,
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severity: DiagnosticSeverity,
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code: string,
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source: string,
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message: string,
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relatedInformation: []const DiagnosticRelatedInformation = &[0]DiagnosticRelatedInformation{},
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};
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pub const TextDocument = struct {
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