Fix json output with invalid unicode.

build.zig

@@ -34,11 +34,6 @@ pub fn build(b: *Builder) void {
         "weather_location",
         "weather_location",
     ) orelse "";
-    if (weather_location.len == 0) {
-        weather_location = "\"\"";
-    } else if (weather_location[0] != '"') {
-        weather_location = std.fmt.allocPrint(b.allocator, "\"{}\"", .{weather_location}) catch "\"\"";
-    }
     exe.addBuildOption([]const u8, "weather_location", weather_location);
 
     //exe.strip = true;

build_runner.zig

@@ -0,0 +1,67 @@
+const root = @import("build.zig");
+const std = @import("std");
+const io = std.io;
+const fmt = std.fmt;
+const Builder = std.build.Builder;
+const Pkg = std.build.Pkg;
+const InstallArtifactStep = std.build.InstallArtifactStep;
+const LibExeObjStep = std.build.LibExeObjStep;
+const ArrayList = std.ArrayList;
+
+///! This is a modified build runner to extract information out of build.zig
+///! Modified from the std.special.build_runner
+pub fn main() !void {
+    var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
+    defer arena.deinit();
+
+    const allocator = &arena.allocator;
+
+    const builder = try Builder.create(allocator, "", "", "");
+    defer builder.destroy();
+
+    try runBuild(builder);
+
+    const stdout_stream = io.getStdOut().outStream();
+
+    // TODO: We currently add packages from every LibExeObj step that the install step depends on.
+    //       Should we error out or keep one step or something similar?
+    // We also flatten them, we should probably keep the nested structure.
+    for (builder.top_level_steps.items) |tls| {
+        for (tls.step.dependencies.items) |step| {
+            try processStep(stdout_stream, step);
+        }
+    }
+}
+
+fn processStep(stdout_stream: anytype, step: *std.build.Step) anyerror!void {
+    if (step.cast(InstallArtifactStep)) |install_exe| {
+        for (install_exe.artifact.packages.items) |pkg| {
+            try processPackage(stdout_stream, pkg);
+        }
+    } else if (step.cast(LibExeObjStep)) |exe| {
+        for (exe.packages.items) |pkg| {
+            try processPackage(stdout_stream, pkg);
+        }
+    } else {
+        for (step.dependencies.items) |unknown_step| {
+            try processStep(stdout_stream, unknown_step);
+        }
+    }
+}
+
+fn processPackage(out_stream: anytype, pkg: Pkg) anyerror!void {
+    try out_stream.print("{}\x00{}\n", .{ pkg.name, pkg.path });
+    if (pkg.dependencies) |dependencies| {
+        for (dependencies) |dep| {
+            try processPackage(out_stream, dep);
+        }
+    }
+}
+
+fn runBuild(builder: *Builder) anyerror!void {
+    switch (@typeInfo(@TypeOf(root.build).ReturnType)) {
+        .Void => root.build(builder),
+        .ErrorUnion => try root.build(builder),
+        else => @compileError("expected return type of build to be 'void' or '!void'"),
+    }
+}

src/bar/bar.zig

@@ -7,6 +7,7 @@ const log = std.log;
 const terminal_version = @import("build_options").terminal_version;
 const debug_allocator = @import("build_options").debug_allocator;
 const disable_terminal_mouse = @import("build_options").disable_terminal_mouse;
+const json = @import("json.zig");
 
 fn readFromSignalFd(signal_fd: std.os.fd_t) !void {
     var buf: [@sizeOf(os.linux.signalfd_siginfo)]u8 align(8) = undefined;
@@ -14,31 +15,6 @@ fn readFromSignalFd(signal_fd: std.os.fd_t) !void {
     return error.Shutdown;
 }
 
-pub fn utf8ValidateSlice(s: []const u8) bool {
-    var i: usize = 0;
-    while (i < s.len) {
-        if (std.unicode.utf8ByteSequenceLength(s[i])) |cp_len| {
-            if (i + cp_len > s.len) {
-                log.err(.uni, "oh nos: {} {} {}\n", .{i + cp_len, i, s.len});
-                log.err(.uni, "oh no: {}\n", .{s[i .. i + cp_len]});
-                return false;
-            }
-
-            if (std.unicode.utf8Decode(s[i .. i + cp_len])) |_| {} else |_| {
-                log.err(.uni, "oh no: {}\n", .{s[i .. i + cp_len]});
-                return false;
-            }
-            i += cp_len;
-        } else |err| {
-                log.err(.uni, "oh noz: {} {} {} {} \"{}\" \n", .{s[i], s.len, i, err, s[0..i+1]});
-
-            return false;
-        }
-    }
-    return true;
-}
-
-
 fn sigemptyset(set: *std.os.sigset_t) void {
     for (set) |*val| {
         val.* = 0;
@@ -103,7 +79,7 @@ pub const Bar = struct {
         // Serialize all bar items and put on stdout.
         try self.out_file.writer().writeAll("[");
         for (self.infos.items) |info, i| {
-            try std.json.stringify(info, .{}, self.out_file.writer());
+            try json.stringify(info, .{}, self.out_file.writer());
 
             if (i < self.infos.items.len - 1) {
                 try self.out_file.writer().writeAll(",");
@@ -239,9 +215,9 @@ pub const Bar = struct {
                 // instead of looping and getting it, maybe then it would make more sense?
                 // Anyway this just strips off the prefix of ',' so I can parse the json.
                 if (line[0] == ',') line = line[1..line.len];
-                const parseOptions = std.json.ParseOptions{ .allocator = self.allocator };
-                const data = try std.json.parse(MouseEvent, &std.json.TokenStream.init(line), parseOptions);
-                defer std.json.parseFree(MouseEvent, data, parseOptions);
+                const parseOptions = json.ParseOptions{ .allocator = self.allocator };
+                const data = try json.parse(MouseEvent, &json.TokenStream.init(line), parseOptions);
+                defer json.parseFree(MouseEvent, data, parseOptions);
 
                 self.dispatch_click_event(data.name, data) catch {};
                 // If mouse_event needs to store the event for after the call is finished,
@@ -316,9 +292,6 @@ pub const Bar = struct {
                 }
                 // If we reach here then it changed.
                 try self.free_info(infoItem);
-if (!utf8ValidateSlice(info.full_text)) {
-std.log.err(.barerr, "Oh No: {}\n", .{info.full_text});
-}
                 self.infos.items[index] = try self.dupe_info(info);
                 try self.print_infos(false);
             }
@@ -332,7 +305,7 @@ pub fn initBar(allocator: *std.mem.Allocator) Bar {
         .widgets = undefined,
         .running = false,
         .infos = std.ArrayList(Info).init(allocator),
-        .items_mutex = std.Mutex.init(),
+        .items_mutex = std.Mutex{},
         .out_file = std.io.getStdOut(),
     };
 }

src/bar/json/write_stream.zig

@@ -0,0 +1,250 @@
+const std = @import("../std.zig");
+const assert = std.debug.assert;
+const maxInt = std.math.maxInt;
+const State = enum {
+    Complete,
+    Value,
+    ArrayStart,
+    Array,
+    ObjectStart,
+    Object,
+};
+pub fn WriteStream(comptime OutStream: type, comptime max_depth: usize) type {
+    return struct {
+        const Self = @This();
+        pub const Stream = OutStream;
+        whitespace: std.json.StringifyOptions.Whitespace = std.json.StringifyOptions.Whitespace{
+            .indent_level = 0,
+            .indent = .{ .Space = 1 },
+        },
+        stream: OutStream,
+        state_index: usize,
+        state: [max_depth]State,
+        pub fn init(stream: OutStream) Self {
+            var self = Self{
+                .stream = stream,
+                .state_index = 1,
+                .state = undefined,
+            };
+            self.state[0] = .Complete;
+            self.state[1] = .Value;
+            return self;
+        }
+        pub fn beginArray(self: *Self) !void {
+            try self.stream.writeByte('[');
+            self.state[self.state_index] = State.ArrayStart;
+            self.whitespace.indent_level += 1;
+        }
+        pub fn beginObject(self: *Self) !void {
+            try self.stream.writeByte('{');
+            self.state[self.state_index] = State.ObjectStart;
+            self.whitespace.indent_level += 1;
+        }
+        pub fn arrayElem(self: *Self) !void {
+            const state = self.state[self.state_index];
+            switch (state) {
+                .Complete => unreachable,
+                .Value => unreachable,
+                .ObjectStart => unreachable,
+                .Object => unreachable,
+                .Array, .ArrayStart => {
+                    if (state == .Array) {
+                        try self.stream.writeByte(',');
+                    }
+                    self.state[self.state_index] = .Array;
+                    self.pushState(.Value);
+                    try self.indent();
+                },
+            }
+        }
+        pub fn objectField(self: *Self, name: []const u8) !void {
+            const state = self.state[self.state_index];
+            switch (state) {
+                .Complete => unreachable,
+                .Value => unreachable,
+                .ArrayStart => unreachable,
+                .Array => unreachable,
+                .Object, .ObjectStart => {
+                    if (state == .Object) {
+                        try self.stream.writeByte(',');
+                    }
+                    self.state[self.state_index] = .Object;
+                    self.pushState(.Value);
+                    try self.indent();
+                    try self.writeEscapedString(name);
+                    try self.stream.writeByte(':');
+                    if (self.whitespace.separator) {
+                        try self.stream.writeByte(' ');
+                    }
+                },
+            }
+        }
+        pub fn endArray(self: *Self) !void {
+            switch (self.state[self.state_index]) {
+                .Complete => unreachable,
+                .Value => unreachable,
+                .ObjectStart => unreachable,
+                .Object => unreachable,
+                .ArrayStart => {
+                    self.whitespace.indent_level -= 1;
+                    try self.stream.writeByte(']');
+                    self.popState();
+                },
+                .Array => {
+                    self.whitespace.indent_level -= 1;
+                    try self.indent();
+                    self.popState();
+                    try self.stream.writeByte(']');
+                },
+            }
+        }
+        pub fn endObject(self: *Self) !void {
+            switch (self.state[self.state_index]) {
+                .Complete => unreachable,
+                .Value => unreachable,
+                .ArrayStart => unreachable,
+                .Array => unreachable,
+                .ObjectStart => {
+                    self.whitespace.indent_level -= 1;
+                    try self.stream.writeByte('}');
+                    self.popState();
+                },
+                .Object => {
+                    self.whitespace.indent_level -= 1;
+                    try self.indent();
+                    self.popState();
+                    try self.stream.writeByte('}');
+                },
+            }
+        }
+        pub fn emitNull(self: *Self) !void {
+            assert(self.state[self.state_index] == State.Value);
+            try self.stringify(null);
+            self.popState();
+        }
+        pub fn emitBool(self: *Self, value: bool) !void {
+            assert(self.state[self.state_index] == State.Value);
+            try self.stringify(value);
+            self.popState();
+        }
+        pub fn emitNumber(
+            self: *Self,
+            value: anytype,
+        ) !void {
+            assert(self.state[self.state_index] == State.Value);
+            switch (@typeInfo(@TypeOf(value))) {
+                .Int => |info| {
+                    if (info.bits < 53) {
+                        try self.stream.print("{}", .{value});
+                        self.popState();
+                        return;
+                    }
+                    if (value < 4503599627370496 and (!info.is_signed or value > -4503599627370496)) {
+                        try self.stream.print("{}", .{value});
+                        self.popState();
+                        return;
+                    }
+                },
+                .ComptimeInt => {
+                    return self.emitNumber(@as(std.math.IntFittingRange(value, value), value));
+                },
+                .Float, .ComptimeFloat => if (@floatCast(f64, value) == value) {
+                    try self.stream.print("{}", .{@floatCast(f64, value)});
+                    self.popState();
+                    return;
+                },
+                else => {},
+            }
+            try self.stream.print("\"{}\"", .{value});
+            self.popState();
+        }
+        pub fn emitString(self: *Self, string: []const u8) !void {
+            assert(self.state[self.state_index] == State.Value);
+            try self.writeEscapedString(string);
+            self.popState();
+        }
+        fn writeEscapedString(self: *Self, string: []const u8) !void {
+            assert(std.unicode.utf8ValidateSlice(string));
+            try self.stringify(string);
+        }
+        pub fn emitJson(self: *Self, json: std.json.Value) Stream.Error!void {
+            assert(self.state[self.state_index] == State.Value);
+            try self.stringify(json);
+            self.popState();
+        }
+        fn indent(self: *Self) !void {
+            assert(self.state_index >= 1);
+            try self.stream.writeByte('\n');
+            try self.whitespace.outputIndent(self.stream);
+        }
+        fn pushState(self: *Self, state: State) void {
+            self.state_index += 1;
+            self.state[self.state_index] = state;
+        }
+        fn popState(self: *Self) void {
+            self.state_index -= 1;
+        }
+        fn stringify(self: *Self, value: anytype) !void {
+            try std.json.stringify(value, std.json.StringifyOptions{
+                .whitespace = self.whitespace,
+            }, self.stream);
+        }
+    };
+}
+pub fn writeStream(
+    out_stream: anytype,
+    comptime max_depth: usize,
+) WriteStream(@TypeOf(out_stream), max_depth) {
+    return WriteStream(@TypeOf(out_stream), max_depth).init(out_stream);
+}
+test "json write stream" {
+    var out_buf: [1024]u8 = undefined;
+    var slice_stream = std.io.fixedBufferStream(&out_buf);
+    const out = slice_stream.outStream();
+    var arena_allocator = std.heap.ArenaAllocator.init(std.testing.allocator);
+    defer arena_allocator.deinit();
+    var w = std.json.writeStream(out, 10);
+    try w.beginObject();
+    try w.objectField("object");
+    try w.emitJson(try getJsonObject(&arena_allocator.allocator));
+    try w.objectField("string");
+    try w.emitString("This is a string");
+    try w.objectField("array");
+    try w.beginArray();
+    try w.arrayElem();
+    try w.emitString("Another string");
+    try w.arrayElem();
+    try w.emitNumber(@as(i32, 1));
+    try w.arrayElem();
+    try w.emitNumber(@as(f32, 3.5));
+    try w.endArray();
+    try w.objectField("int");
+    try w.emitNumber(@as(i32, 10));
+    try w.objectField("float");
+    try w.emitNumber(@as(f32, 3.5));
+    try w.endObject();
+    const result = slice_stream.getWritten();
+    const expected =
+        \\{
+        \\ "object": {
+        \\  "one": 1,
+        \\  "two": 2.0e+00
+        \\ },
+        \\ "string": "This is a string",
+        \\ "array": [
+        \\  "Another string",
+        \\  1,
+        \\  3.5e+00
+        \\ ],
+        \\ "int": 10,
+        \\ "float": 3.5e+00
+        \\}
+    ;
+    std.testing.expect(std.mem.eql(u8, expected, result));
+}
+fn getJsonObject(allocator: *std.mem.Allocator) !std.json.Value {
+    var value = std.json.Value{ .Object = std.json.ObjectMap.init(allocator) };
+    _ = try value.Object.put("one", std.json.Value{ .Integer = @intCast(i64, 1) });
+    _ = try value.Object.put("two", std.json.Value{ .Float = 2.0 });
+    return value;
+}

src/main.zig

@@ -18,7 +18,7 @@ const Info = @import("types/info.zig");
 const debug_allocator = @import("build_options").debug_allocator;
 
 // Set the log level to warning
-//pub const log_level: std.log.Level = .warn;
+pub const log_level: std.log.Level = .warn;
 // Define root.log to override the std implementation
 pub fn log(
     comptime level: std.log.Level,
@@ -63,7 +63,6 @@ pub fn main() !void {
         if (!debug_allocator) arena.deinit();
     }
 
-
     var bar = barImpl.initBar(allocator);
     var br = Bar.init(&bar);
 
@@ -78,8 +77,8 @@ pub fn main() !void {
     bar.widgets = widgets[0..];
     try br.start();
     if (debug_allocator) {
-        std.log.debug(.main, "Finished cleanup, last allocation info.\n", .{});
-        std.log.debug(.main, "\n{}\n", .{dbgAlloc.info});
+        std.debug.print("Finished cleanup, last allocation info.\n", .{});
+        std.debug.print("\n{}\n", .{dbgAlloc.info});
         dbgAlloc.printRemainingStackTraces();
         dbgAlloc.deinit();
     }

src/widgets/memory/memory.zig

@@ -129,6 +129,19 @@ pub const MemoryWidget = struct {
         self.update_bar() catch {};
     }
 
+    pub fn clear_cache(self: *MemoryWidget) !void {
+        var buffer: [512 * 512]u8 = undefined;
+        var fba = std.heap.FixedBufferAllocator.init(&buffer);
+        var allocator = &fba.allocator;
+        var proc = try std.ChildProcess.init(&[_][]const u8{ "bash", "/home/kitteh/Scripts/drop-cache.sh" }, allocator);
+        proc.stdout_behavior = .Close;
+        proc.stdin_behavior = .Close;
+        proc.stderr_behavior = .Close;
+        try proc.spawn();
+        _ = try proc.kill();
+        proc.deinit();
+    }
+
     fn update_bar(self: *MemoryWidget) !void {
         var buffer: [512]u8 = undefined;
         var fba = std.heap.FixedBufferAllocator.init(&buffer);
@@ -191,6 +204,11 @@ pub const MemoryWidget = struct {
             .full_text = text,
             .markup = "pango",
         });
+        if (kibibytesToMegabytes(memInfo.cached) > 1000) {
+            self.clear_cache() catch |err| {
+                std.log.err(.memory, "Can't clear cache {}.\n", .{err});
+            };
+        }
     }
 
     pub fn start(self: *MemoryWidget) anyerror!void {

src/widgets/network/network.zig

@@ -64,7 +64,7 @@ pub const NetworkWidget = struct {
     network_infos: std.ArrayList(NetworkInfo),
     num_interfaces: u8 = 0,
     current_interface: u8 = 0,
-    update_mutex: std.Mutex = std.Mutex.init(),
+    update_mutex: std.Mutex = std.Mutex{},
 
     pub fn name(self: *NetworkWidget) []const u8 {
         return "network";
@@ -94,12 +94,16 @@ pub const NetworkWidget = struct {
     pub fn update_network_infos(self: *NetworkWidget) anyerror!void {
         const lock = self.update_mutex.acquire();
         defer lock.release();
+        std.log.debug(.network, "Updating network info.\n", .{});
         for (self.network_infos.items) |info| {
             freeString(self.allocator, info.network_info);
         }
         self.num_interfaces = 0;
         var proc = try std.ChildProcess.init(&[_][]const u8{ "nmcli", "-f", "common", "-c", "no", "d" }, self.allocator);
-        defer { _ = proc.kill() catch {}; proc.deinit(); }
+        defer {
+            _ = proc.kill() catch {};
+            proc.deinit();
+        }
         proc.stdout_behavior = .Pipe;
         try proc.spawn();
         var i: u8 = 0;