upgrade to zig 0.12.0

.github/workflows/zig-build.yaml

@@ -14,6 +14,8 @@ jobs:
         with:
           version: 0.12.0
       - uses: Hanaasagi/zig-action-cache@v1.1.5
+      - name: Install fontconfig
+        run: apt update && apt install libfontconfig1 && ln -s /usr/lib/x86_64-linux-gnu/libfontconfig.so.1 /usr/local/lib/libfontconfig.so
       - name: Build project
         run: zig build --summary all
       - name: Run tests

Dockerfile

@@ -6,7 +6,7 @@ RUN apt-get update \
          ca-certificates \
          curl \
          xz-utils \
-    && curl https://ziglang.org/download/0.11.0/zig-linux-x86_64-0.11.0.tar.xz | tar -C /usr/local/ -xJ \
+    && curl https://ziglang.org/download/0.12.0/zig-linux-x86_64-0.12.0.tar.xz | tar -C /usr/local/ -xJ \
     && apt-get -y remove curl xz-utils  \
     && ln -s /usr/local/zig*/zig /usr/local/bin \
     && rm -rf /var/lib/apt/lists/*

README.md

@@ -19,8 +19,9 @@ Building
 
 This is not fully `zig build` friendly, since it links to system libraries.
 Specifically, you need to have [fontconfig](https://www.freedesktop.org/wiki/Software/fontconfig/)
-and dependencies installed. I initially went down that rabbit hole, but it's
-kind of a mess that I don't need for what is really a personal project.
+and dependencies installed. The include files are pulled from fontconfig 2.14.1,
+which is the version in debian bullseye, but he system library still needs to
+linked.
 
 To help with the build, a Dockerfile exists in this repository that can be used
 to create a docker image with the appropriate zig version and system libraries.

build.zig

@@ -24,7 +24,9 @@ pub fn build(b: *std.Build) void {
         .optimize = optimize,
     });
 
-    configure(exe);
+    const fontconfig = b.dependency("fontconfig", .{});
+
+    configure(b, fontconfig, exe);
 
     // This declares intent for the executable to be installed into the
     // standard location when the user invokes the "install" step (the default
@@ -62,7 +64,7 @@ pub fn build(b: *std.Build) void {
         .optimize = optimize,
     });
 
-    configure(unit_tests);
+    configure(b, fontconfig, unit_tests);
 
     const run_unit_tests = b.addRunArtifact(unit_tests);
 
@@ -73,14 +75,17 @@ pub fn build(b: *std.Build) void {
     test_step.dependOn(&run_unit_tests.step);
 }
 
-fn configure(object: anytype) void {
+fn configure(b: *std.Build, fontconfig: *std.Build.Dependency, object: anytype) void {
     // object.linkage = .static;
     object.linkLibC();
 
     // Fontconfig must be installed. Docker can also be used (see Dockerfile)
-    object.addSystemIncludePath("/usr/include");
+    object.addSystemIncludePath(fontconfig.path(""));
     object.linkSystemLibrary("fontconfig");
     // object.linkSystemLibrary("expat"); // fontconfig dependency - needed for static builds
-    object.addLibraryPath("/usr/lib");
-    object.addCSourceFile("src/fontconfig.c", &[_][]const u8{"-std=c99"});
+    object.addLibraryPath(.{ .cwd_relative = "/usr/lib" });
+    object.addCSourceFile(.{
+        .file = b.path("src/fontconfig.c"),
+        .flags = &[_][]const u8{"-std=c99"},
+    });
 }

build.zig.zon

@@ -0,0 +1,36 @@
+.{
+    .name = "fontfinder",
+    // This is a [Semantic Version](https://semver.org/).
+    // In a future version of Zig it will be used for package deduplication.
+    .version = "0.0.0",
+
+    // This field is optional.
+    // This is currently advisory only; Zig does not yet do anything
+    // with this value.
+    //.minimum_zig_version = "0.11.0",
+
+    // This field is optional.
+    // Each dependency must either provide a `url` and `hash`, or a `path`.
+    // `zig build --fetch` can be used to fetch all dependencies of a package, recursively.
+    // Once all dependencies are fetched, `zig build` no longer requires
+    // internet connectivity.
+    .dependencies = .{
+        .fontconfig = .{
+            .url = "https://gitlab.freedesktop.org/fontconfig/fontconfig/-/archive/2.14.1/fontconfig-2.14.1.tar.gz",
+            .hash = "1220a54d89babad491b562dad3f2c73414c95ea2f46a4e7206f1e36be4632654458e",
+        },
+    },
+    .paths = .{
+        // This makes *all* files, recursively, included in this package. It is generally
+        // better to explicitly list the files and directories instead, to insure that
+        // fetching from tarballs, file system paths, and version control all result
+        // in the same contents hash.
+        "",
+        // For example...
+        //"build.zig",
+        //"build.zig.zon",
+        //"src",
+        //"LICENSE",
+        //"README.md",
+    },
+}

src/fontconfig.zig

@@ -35,7 +35,7 @@ pub const FontList = struct {
 
     const Self = @This();
     pub fn initCapacity(allocator: std.mem.Allocator, num: usize, pattern: *c.FcPattern, fontset: *c.FcFontSet) std.mem.Allocator.Error!Self {
-        var al = try std.ArrayList(Font).initCapacity(allocator, num);
+        const al = try std.ArrayList(Font).initCapacity(allocator, num);
         return Self{
             .allocator = allocator,
             .list = al,
@@ -192,7 +192,7 @@ pub const FontQuery = struct {
         var rc = std.ArrayList(RangeFont).init(self.allocator);
         defer rc.deinit();
 
-        var previously_supported = blk: {
+        const previously_supported = blk: {
             if (!exclude_previous) break :blk null;
             var al = try std.ArrayList(bool).initCapacity(self.allocator, ending_codepoint - starting_codepoint);
             defer al.deinit();
@@ -267,7 +267,7 @@ test "Get fonts" {
     var fl = try fq.fontList(":regular:normal:spacing=100:slant=0");
     defer fl.deinit();
     try std.testing.expect(fl.list.items.len > 0);
-    var matched = blk: {
+    const matched = blk: {
         for (fl.list.items) |item| {
             log.debug("full_name: '{s}'", .{item.full_name});
             if (std.mem.eql(u8, "DejaVu Sans Mono", item.full_name))

src/main.zig

@@ -52,7 +52,7 @@ pub fn main() !u8 {
     if (options.list_fonts) {
         var fq = fontconfig.FontQuery.init(allocator);
         defer fq.deinit();
-        var fl = try fq.fontList(options.pattern);
+        const fl = try fq.fontList(options.pattern);
         var longest_family_name = @as(usize, 0);
         var longest_style_name = @as(usize, 0);
         for (fl.list.items) |f| {
@@ -81,7 +81,7 @@ pub fn main() !u8 {
         var si = std.mem.splitScalar(u8, fo, ',');
         var fq = fontconfig.FontQuery.init(allocator);
         defer fq.deinit();
-        var fl = try fq.fontList(options.pattern);
+        const fl = try fq.fontList(options.pattern);
         // This messes with data after, and we don't need to deinit anyway
         // defer fl.deinit();
         var al = try std.ArrayList(fontconfig.Font).initCapacity(allocator, std.mem.count(u8, fo, ",") + 2);
@@ -184,7 +184,7 @@ fn outputRange(
 ) !void {
     var fq = fontconfig.FontQuery.init(allocator);
     defer fq.deinit();
-    var range_fonts = try fq.fontsForRange(starting_codepoint, ending_codepoint, fonts, exclude_previous); // do we want hard limits around this?
+    const range_fonts = try fq.fontsForRange(starting_codepoint, ending_codepoint, fonts, exclude_previous); // do we want hard limits around this?
     defer allocator.free(range_fonts);
 
     std.log.debug("Got {d} range fonts back from query", .{range_fonts.len});
@@ -323,7 +323,7 @@ test "command line parses with long name no equals" {
     try std.testing.expectEqualStrings("Latin-1", options.groups.?);
 }
 test "command line parses with long name equals" {
-    var log_level = std.testing.log_level;
+    const log_level = std.testing.log_level;
     defer std.testing.log_level = log_level;
     // std.testing.log_level = .debug;
     var it = try std.process.ArgIteratorGeneral(.{}).init(std.testing.allocator, "--groups=Latin-1");
@@ -339,7 +339,7 @@ test "Get ranges" {
     var fl = try fq.fontList(":regular:normal:spacing=100:slant=0");
     defer fl.deinit();
     try std.testing.expect(fl.list.items.len > 0);
-    var matched = blk: {
+    const matched = blk: {
         for (fl.list.items) |item| {
             std.log.debug("full_name: '{s}'", .{item.full_name});
             if (std.mem.eql(u8, "DejaVu Sans Mono", item.full_name))
@@ -352,7 +352,7 @@ test "Get ranges" {
     var al = std.ArrayList(u8).init(std.testing.allocator);
     defer al.deinit();
     const range_name = "Basic Latin";
-    var matched_range = try blk: {
+    const matched_range = try blk: {
         var unicode_ranges = unicode.all_ranges();
         while (unicode_ranges.next()) |range| {
             var it = std.mem.splitScalar(u8, range_name, ',');
@@ -364,7 +364,7 @@ test "Get ranges" {
         }
         break :blk error.RangeNotFound;
     };
-    var log_level = std.testing.log_level;
+    const log_level = std.testing.log_level;
     std.testing.log_level = .debug;
     defer std.testing.log_level = log_level;
     try outputRange(