flow/src/Project.zig
CJ van den Berg 9eb6dd3be4 fix: send sigterm to languages servers on exit
Not all language servers willingly exit if we just close stdin. Eventually
we will follow the protocol's shutdown process, but for now we just send a
sigterm.
2024-04-15 21:15:26 +02:00

780 lines
31 KiB
Zig

const std = @import("std");
const tp = @import("thespian");
const cbor = @import("cbor");
const root = @import("root");
const dizzy = @import("dizzy");
const Buffer = @import("Buffer");
const fuzzig = @import("fuzzig");
const builtin = @import("builtin");
const LSP = @import("LSP.zig");
a: std.mem.Allocator,
name: []const u8,
files: std.ArrayList(File),
open_time: i64,
language_servers: std.StringHashMap(LSP),
file_language_server: std.StringHashMap(LSP),
const Self = @This();
const File = struct {
path: []const u8,
mtime: i128,
row: usize = 0,
col: usize = 0,
visited: bool = false,
};
pub fn init(a: std.mem.Allocator, name: []const u8) error{OutOfMemory}!Self {
return .{
.a = a,
.name = try a.dupe(u8, name),
.files = std.ArrayList(File).init(a),
.open_time = std.time.milliTimestamp(),
.language_servers = std.StringHashMap(LSP).init(a),
.file_language_server = std.StringHashMap(LSP).init(a),
};
}
pub fn deinit(self: *Self) void {
var i_ = self.file_language_server.iterator();
while (i_.next()) |p| {
self.a.free(p.key_ptr.*);
}
var i = self.language_servers.iterator();
while (i.next()) |p| {
self.a.free(p.key_ptr.*);
p.value_ptr.*.term();
}
for (self.files.items) |file| self.a.free(file.path);
self.files.deinit();
self.a.free(self.name);
}
pub fn write_state(self: *Self, writer: anytype) !void {
for (self.files.items) |file| {
if (!file.visited) continue;
try cbor.writeArrayHeader(writer, 4);
try cbor.writeValue(writer, file.path);
try cbor.writeValue(writer, file.mtime);
try cbor.writeValue(writer, file.row);
try cbor.writeValue(writer, file.col);
}
}
pub fn restore_state(self: *Self, data: []const u8) !void {
var path: []const u8 = undefined;
var mtime: i128 = undefined;
var row: usize = undefined;
var col: usize = undefined;
defer self.sort_files_by_mtime();
var iter: []const u8 = data;
while (try cbor.matchValue(&iter, .{
tp.extract(&path),
tp.extract(&mtime),
tp.extract(&row),
tp.extract(&col),
})) {
try self.update_mru_internal(path, mtime, row, col);
}
}
fn get_lsp(self: *Self, language_server: []const u8) !LSP {
if (self.language_servers.get(language_server)) |lsp| return lsp;
const lsp = try LSP.open(self.a, .{ .buf = language_server });
try self.language_servers.put(try self.a.dupe(u8, language_server), lsp);
const uri = try self.make_URI(null);
defer self.a.free(uri);
const basename_begin = std.mem.lastIndexOfScalar(u8, self.name, std.fs.path.sep);
const basename = if (basename_begin) |begin| self.name[begin + 1 ..] else self.name;
const response = try self.send_lsp_init_request(lsp, self.name, basename, uri);
defer self.a.free(response.buf);
try lsp.send_notification("initialized", .{});
return lsp;
}
fn get_file_lsp(self: *Self, file_path: []const u8) !LSP {
const lsp = self.file_language_server.get(file_path) orelse return tp.exit("no language server");
if (lsp.pid.expired()) return tp.exit("no language server");
return lsp;
}
fn make_URI(self: *Self, file_path: ?[]const u8) ![]const u8 {
var buf = std.ArrayList(u8).init(self.a);
if (file_path) |path|
try buf.writer().print("file://{s}/{s}", .{ self.name, path })
else
try buf.writer().print("file://{s}", .{self.name});
return buf.toOwnedSlice();
}
pub fn add_file(self: *Self, path: []const u8, mtime: i128) error{OutOfMemory}!void {
(try self.files.addOne()).* = .{ .path = try self.a.dupe(u8, path), .mtime = mtime };
}
pub fn sort_files_by_mtime(self: *Self) void {
const less_fn = struct {
fn less_fn(_: void, lhs: File, rhs: File) bool {
return lhs.mtime > rhs.mtime;
}
}.less_fn;
std.mem.sort(File, self.files.items, {}, less_fn);
}
pub fn request_recent_files(self: *Self, from: tp.pid_ref, max: usize) error{ OutOfMemory, Exit }!void {
defer from.send(.{ "PRJ", "recent_done", "" }) catch {};
for (self.files.items, 0..) |file, i| {
try from.send(.{ "PRJ", "recent", file.path });
if (i >= max) return;
}
}
fn simple_query_recent_files(self: *Self, from: tp.pid_ref, max: usize, query: []const u8) error{ OutOfMemory, Exit }!usize {
var i: usize = 0;
defer from.send(.{ "PRJ", "recent_done", query }) catch {};
for (self.files.items) |file| {
if (file.path.len < query.len) continue;
if (std.mem.indexOf(u8, file.path, query)) |idx| {
switch (query.len) {
1 => try from.send(.{ "PRJ", "recent", file.path, .{idx} }),
2 => try from.send(.{ "PRJ", "recent", file.path, .{ idx, idx + 1 } }),
else => try from.send(.{ "PRJ", "recent", file.path }),
}
i += 1;
if (i >= max) return i;
}
}
return i;
}
pub fn query_recent_files(self: *Self, from: tp.pid_ref, max: usize, query: []const u8) error{ OutOfMemory, Exit }!usize {
if (query.len < 3)
return self.simple_query_recent_files(from, max, query);
defer from.send(.{ "PRJ", "recent_done", query }) catch {};
var searcher = try fuzzig.Ascii.init(
self.a,
std.fs.max_path_bytes, // haystack max size
std.fs.max_path_bytes, // needle max size
.{ .case_sensitive = false },
);
defer searcher.deinit();
const Match = struct {
path: []const u8,
score: i32,
matches: []const usize,
};
var matches = std.ArrayList(Match).init(self.a);
for (self.files.items) |file| {
const match = searcher.scoreMatches(file.path, query);
if (match.score) |score| {
(try matches.addOne()).* = .{
.path = file.path,
.score = score,
.matches = try self.a.dupe(usize, match.matches),
};
}
}
if (matches.items.len == 0) return 0;
const less_fn = struct {
fn less_fn(_: void, lhs: Match, rhs: Match) bool {
return lhs.score > rhs.score;
}
}.less_fn;
std.mem.sort(Match, matches.items, {}, less_fn);
for (matches.items[0..@min(max, matches.items.len)]) |match|
try from.send(.{ "PRJ", "recent", match.path, match.matches });
return @min(max, matches.items.len);
}
pub fn update_mru(self: *Self, file_path: []const u8, row: usize, col: usize) !void {
defer self.sort_files_by_mtime();
try self.update_mru_internal(file_path, std.time.nanoTimestamp(), row, col);
}
fn update_mru_internal(self: *Self, file_path: []const u8, mtime: i128, row: usize, col: usize) !void {
defer self.sort_files_by_mtime();
for (self.files.items) |*file| {
if (!std.mem.eql(u8, file.path, file_path)) continue;
file.mtime = mtime;
if (row != 0) {
file.row = row;
file.col = col;
file.visited = true;
}
return;
}
return self.add_file(file_path, std.time.nanoTimestamp());
}
pub fn get_mru_position(self: *Self, from: tp.pid_ref, file_path: []const u8) !void {
for (self.files.items) |*file| {
if (!std.mem.eql(u8, file.path, file_path)) continue;
if (file.row != 0)
try from.send(.{ "cmd", "goto", .{ file.row + 1, file.col + 1 } });
return;
}
}
pub fn did_open(self: *Self, file_path: []const u8, file_type: []const u8, language_server: []const u8, version: usize, text: []const u8) tp.result {
self.update_mru(file_path, 0, 0) catch {};
const lsp = self.get_lsp(language_server) catch |e| return tp.exit_error(e);
if (!self.file_language_server.contains(file_path)) {
const key = self.a.dupe(u8, file_path) catch |e| return tp.exit_error(e);
self.file_language_server.put(key, lsp) catch |e| return tp.exit_error(e);
}
const uri = self.make_URI(file_path) catch |e| return tp.exit_error(e);
defer self.a.free(uri);
try lsp.send_notification("textDocument/didOpen", .{
.textDocument = .{ .uri = uri, .languageId = file_type, .version = version, .text = text },
});
}
pub fn did_change(self: *Self, file_path: []const u8, version: usize, root_dst_addr: usize, root_src_addr: usize) !void {
const lsp = try self.get_file_lsp(file_path);
const uri = self.make_URI(file_path) catch |e| return tp.exit_error(e);
defer self.a.free(uri);
const root_dst: Buffer.Root = if (root_dst_addr == 0) return else @ptrFromInt(root_dst_addr);
const root_src: Buffer.Root = if (root_src_addr == 0) return else @ptrFromInt(root_src_addr);
var dizzy_edits = std.ArrayListUnmanaged(dizzy.Edit){};
var dst = std.ArrayList(u8).init(self.a);
var src = std.ArrayList(u8).init(self.a);
var scratch = std.ArrayListUnmanaged(u32){};
var edits_cb = std.ArrayList(u8).init(self.a);
const writer = edits_cb.writer();
defer {
edits_cb.deinit();
dst.deinit();
src.deinit();
scratch.deinit(self.a);
dizzy_edits.deinit(self.a);
}
try root_dst.store(dst.writer());
try root_src.store(src.writer());
const scratch_len = 4 * (dst.items.len + src.items.len) + 2;
try scratch.ensureTotalCapacity(self.a, scratch_len);
scratch.items.len = scratch_len;
try dizzy.PrimitiveSliceDiffer(u8).diff(self.a, &dizzy_edits, src.items, dst.items, scratch.items);
var lines_dst: usize = 0;
var pos_src: usize = 0;
var pos_dst: usize = 0;
var last_offset: usize = 0;
var edits_count: usize = 0;
for (dizzy_edits.items) |dizzy_edit| {
switch (dizzy_edit.kind) {
.equal => {
const dist = dizzy_edit.range.end - dizzy_edit.range.start;
pos_src += dist;
pos_dst += dist;
scan_char(src.items[dizzy_edit.range.start..dizzy_edit.range.end], &lines_dst, '\n', &last_offset);
},
.insert => {
const dist = dizzy_edit.range.end - dizzy_edit.range.start;
pos_src += 0;
pos_dst += dist;
const line_start_dst: usize = lines_dst;
scan_char(dst.items[dizzy_edit.range.start..dizzy_edit.range.end], &lines_dst, '\n', null);
try cbor.writeValue(writer, .{
.range = .{
.start = .{ .line = line_start_dst, .character = last_offset },
.end = .{ .line = line_start_dst, .character = last_offset },
},
.text = dst.items[dizzy_edit.range.start..dizzy_edit.range.end],
});
edits_count += 1;
},
.delete => {
const dist = dizzy_edit.range.end - dizzy_edit.range.start;
pos_src += dist;
pos_dst += 0;
var line_end_dst: usize = lines_dst;
var offset_end_dst: usize = last_offset;
scan_char(src.items[dizzy_edit.range.start..dizzy_edit.range.end], &line_end_dst, '\n', &offset_end_dst);
if (lines_dst == line_end_dst) offset_end_dst = last_offset + dist;
try cbor.writeValue(writer, .{
.range = .{
.start = .{ .line = lines_dst, .character = last_offset },
.end = .{ .line = line_end_dst, .character = offset_end_dst },
},
.text = "",
});
edits_count += 1;
},
}
}
var msg = std.ArrayList(u8).init(self.a);
defer msg.deinit();
const msg_writer = msg.writer();
try cbor.writeMapHeader(msg_writer, 2);
try cbor.writeValue(msg_writer, "textDocument");
try cbor.writeValue(msg_writer, .{ .uri = uri, .version = version });
try cbor.writeValue(msg_writer, "contentChanges");
try cbor.writeArrayHeader(msg_writer, edits_count);
_ = try msg_writer.write(edits_cb.items);
try lsp.send_notification_raw("textDocument/didChange", msg.items);
}
fn scan_char(chars: []const u8, lines: *usize, char: u8, last_offset: ?*usize) void {
var pos = chars;
while (pos.len > 0) {
if (pos[0] == char) {
if (last_offset) |off| off.* = pos.len - 1;
lines.* += 1;
}
pos = pos[1..];
}
}
pub fn did_save(self: *Self, file_path: []const u8) tp.result {
const lsp = try self.get_file_lsp(file_path);
const uri = self.make_URI(file_path) catch |e| return tp.exit_error(e);
defer self.a.free(uri);
try lsp.send_notification("textDocument/didSave", .{
.textDocument = .{ .uri = uri },
});
}
pub fn did_close(self: *Self, file_path: []const u8) tp.result {
const lsp = try self.get_file_lsp(file_path);
const uri = self.make_URI(file_path) catch |e| return tp.exit_error(e);
defer self.a.free(uri);
try lsp.send_notification("textDocument/didClose", .{
.textDocument = .{ .uri = uri },
});
}
pub fn goto_definition(self: *Self, from: tp.pid_ref, file_path: []const u8, row: usize, col: usize) !void {
const lsp = try self.get_file_lsp(file_path);
const uri = self.make_URI(file_path) catch |e| return tp.exit_error(e);
defer self.a.free(uri);
const response = try lsp.send_request(self.a, "textDocument/definition", .{
.textDocument = .{ .uri = uri },
.position = .{ .line = row, .character = col },
});
defer self.a.free(response.buf);
var link: []const u8 = undefined;
if (try response.match(.{ "child", tp.string, "result", tp.array })) {
if (try response.match(.{ tp.any, tp.any, tp.any, .{ tp.extract_cbor(&link), tp.more } })) {
try self.navigate_to_location_link(from, link);
} else if (try response.match(.{ tp.any, tp.any, tp.any, .{tp.extract_cbor(&link)} })) {
try self.navigate_to_location_link(from, link);
}
} else if (try response.match(.{ "child", tp.string, "result", tp.null_ })) {
return;
} else if (try response.match(.{ "child", tp.string, "result", tp.extract_cbor(&link) })) {
try self.navigate_to_location_link(from, link);
}
}
fn navigate_to_location_link(self: *Self, from: tp.pid_ref, location_link: []const u8) !void {
var iter = location_link;
var targetUri: ?[]const u8 = null;
var targetRange: ?Range = null;
var targetSelectionRange: ?Range = null;
var len = try cbor.decodeMapHeader(&iter);
while (len > 0) : (len -= 1) {
var field_name: []const u8 = undefined;
if (!(try cbor.matchString(&iter, &field_name))) return error.InvalidMessage;
if (std.mem.eql(u8, field_name, "targetUri") or std.mem.eql(u8, field_name, "uri")) {
var value: []const u8 = undefined;
if (!(try cbor.matchValue(&iter, cbor.extract(&value)))) return error.InvalidMessageField;
targetUri = value;
} else if (std.mem.eql(u8, field_name, "targetRange") or std.mem.eql(u8, field_name, "range")) {
var range: []const u8 = undefined;
if (!(try cbor.matchValue(&iter, cbor.extract_cbor(&range)))) return error.InvalidMessageField;
targetRange = try read_range(range);
} else if (std.mem.eql(u8, field_name, "targetSelectionRange")) {
var range: []const u8 = undefined;
if (!(try cbor.matchValue(&iter, cbor.extract_cbor(&range)))) return error.InvalidMessageField;
targetSelectionRange = try read_range(range);
} else {
try cbor.skipValue(&iter);
}
}
if (targetUri == null or targetRange == null) return error.InvalidMessageField;
if (!std.mem.eql(u8, targetUri.?[0..7], "file://")) return error.InvalidTargetURI;
const file_path = try std.Uri.unescapeString(self.a, targetUri.?[7..]);
defer self.a.free(file_path);
if (targetSelectionRange) |sel| {
try from.send(.{ "cmd", "navigate", .{
.file = file_path,
.goto = .{
targetRange.?.start.line + 1,
targetRange.?.start.character + 1,
sel.start.line,
sel.start.character,
sel.end.line,
sel.end.character,
},
} });
} else {
try from.send(.{ "cmd", "navigate", .{
.file = file_path,
.goto = .{
targetRange.?.start.line + 1,
targetRange.?.start.character + 1,
},
} });
}
}
const Range = struct { start: Position, end: Position };
fn read_range(range: []const u8) !Range {
var iter = range;
var start: ?Position = null;
var end: ?Position = null;
var len = try cbor.decodeMapHeader(&iter);
while (len > 0) : (len -= 1) {
var field_name: []const u8 = undefined;
if (!(try cbor.matchString(&iter, &field_name))) return error.InvalidMessage;
if (std.mem.eql(u8, field_name, "start")) {
var position: []const u8 = undefined;
if (!(try cbor.matchValue(&iter, cbor.extract_cbor(&position)))) return error.InvalidMessageField;
start = try read_position(position);
} else if (std.mem.eql(u8, field_name, "end")) {
var position: []const u8 = undefined;
if (!(try cbor.matchValue(&iter, cbor.extract_cbor(&position)))) return error.InvalidMessageField;
end = try read_position(position);
} else {
try cbor.skipValue(&iter);
}
}
if (start == null or end == null) return error.InvalidMessageField;
return .{ .start = start.?, .end = end.? };
}
const Position = struct { line: usize, character: usize };
fn read_position(position: []const u8) !Position {
var iter = position;
var line: ?usize = 0;
var character: ?usize = 0;
var len = try cbor.decodeMapHeader(&iter);
while (len > 0) : (len -= 1) {
var field_name: []const u8 = undefined;
if (!(try cbor.matchString(&iter, &field_name))) return error.InvalidMessage;
if (std.mem.eql(u8, field_name, "line")) {
if (!(try cbor.matchValue(&iter, cbor.extract(&line)))) return error.InvalidMessageField;
} else if (std.mem.eql(u8, field_name, "character")) {
if (!(try cbor.matchValue(&iter, cbor.extract(&character)))) return error.InvalidMessageField;
} else {
try cbor.skipValue(&iter);
}
}
if (line == null or character == null) return error.InvalidMessageField;
return .{ .line = line.?, .character = character.? };
}
fn send_lsp_init_request(self: *Self, lsp: LSP, project_path: []const u8, project_basename: []const u8, project_uri: []const u8) error{Exit}!tp.message {
return lsp.send_request(self.a, "initialize", .{
.processId = if (builtin.os.tag == .linux) std.os.linux.getpid() else null,
.rootPath = project_path,
.rootUri = project_uri,
.workspaceFolders = .{
.{
.uri = project_uri,
.name = project_basename,
},
},
.trace = "verbose",
.locale = "en-us",
.clientInfo = .{
.name = root.application_name,
.version = "0.0.1",
},
.capabilities = .{
.workspace = .{
.applyEdit = true,
.workspaceEdit = .{
.documentChanges = true,
.resourceOperations = .{
"create",
"rename",
"delete",
},
.failureHandling = "textOnlyTransactional",
.normalizesLineEndings = true,
.changeAnnotationSupport = .{ .groupsOnLabel = true },
},
// .configuration = true,
.didChangeWatchedFiles = .{
.dynamicRegistration = true,
.relativePatternSupport = true,
},
.symbol = .{
.dynamicRegistration = true,
.symbolKind = .{
.valueSet = .{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26 },
},
.tagSupport = .{ .valueSet = .{1} },
.resolveSupport = .{ .properties = .{"location.range"} },
},
.codeLens = .{ .refreshSupport = true },
.executeCommand = .{ .dynamicRegistration = true },
// .didChangeConfiguration = .{ .dynamicRegistration = true },
.workspaceFolders = true,
.semanticTokens = .{ .refreshSupport = true },
.fileOperations = .{
.dynamicRegistration = true,
.didCreate = true,
.didRename = true,
.didDelete = true,
.willCreate = true,
.willRename = true,
.willDelete = true,
},
.inlineValue = .{ .refreshSupport = true },
.inlayHint = .{ .refreshSupport = true },
.diagnostics = .{ .refreshSupport = true },
},
.textDocument = .{
.publishDiagnostics = .{
.relatedInformation = true,
.versionSupport = false,
.tagSupport = .{ .valueSet = .{ 1, 2 } },
.codeDescriptionSupport = true,
.dataSupport = true,
},
.synchronization = .{
.dynamicRegistration = true,
.willSave = true,
.willSaveWaitUntil = true,
.didSave = true,
},
.completion = .{
.dynamicRegistration = true,
.contextSupport = true,
.completionItem = .{
.snippetSupport = true,
.commitCharactersSupport = true,
.documentationFormat = .{
"markdown",
"plaintext",
},
.deprecatedSupport = true,
.preselectSupport = true,
.tagSupport = .{ .valueSet = .{1} },
.insertReplaceSupport = true,
.resolveSupport = .{ .properties = .{
"documentation",
"detail",
"additionalTextEdits",
} },
.insertTextModeSupport = .{ .valueSet = .{ 1, 2 } },
.labelDetailsSupport = true,
},
.insertTextMode = 2,
.completionItemKind = .{
.valueSet = .{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 },
},
.completionList = .{ .itemDefaults = .{
"commitCharacters",
"editRange",
"insertTextFormat",
"insertTextMode",
} },
},
.hover = .{
.dynamicRegistration = true,
.contentFormat = .{ "markdown", "plaintext" },
},
.signatureHelp = .{
.dynamicRegistration = true,
.signatureInformation = .{
.documentationFormat = .{ "markdown", "plaintext" },
.parameterInformation = .{ .labelOffsetSupport = true },
.activeParameterSupport = true,
},
.contextSupport = true,
},
.definition = .{
.dynamicRegistration = true,
.linkSupport = true,
},
.references = .{ .dynamicRegistration = true },
.documentHighlight = .{ .dynamicRegistration = true },
.documentSymbol = .{
.dynamicRegistration = true,
.symbolKind = .{
.valueSet = .{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26 },
},
.hierarchicalDocumentSymbolSupport = true,
.tagSupport = .{ .valueSet = .{1} },
.labelSupport = true,
},
.codeAction = .{
.dynamicRegistration = true,
.isPreferredSupport = true,
.disabledSupport = true,
.dataSupport = true,
.resolveSupport = .{ .properties = .{"edit"} },
.codeActionLiteralSupport = .{
.codeActionKind = .{
.valueSet = .{
"",
"quickfix",
"refactor",
"refactor.extract",
"refactor.inline",
"refactor.rewrite",
"source",
"source.organizeImports",
},
},
},
.honorsChangeAnnotations = false,
},
.codeLens = .{ .dynamicRegistration = true },
.formatting = .{ .dynamicRegistration = true },
.rangeFormatting = .{ .dynamicRegistration = true },
.onTypeFormatting = .{ .dynamicRegistration = true },
.rename = .{
.dynamicRegistration = true,
.prepareSupport = true,
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