Some cleanup to build zon.

Minor start on threaded extraction

build.zig

@@ -20,7 +20,7 @@ pub fn build(b: *std.Build) !void {
         mod.linkSystemLibrary("zstd", .{});
 
     const unsquashfs_options = b.addOptions();
-    unsquashfs_options.addOption(std.SemanticVersion, "version_string", try std.SemanticVersion.parse(version_string_option orelse "0.0.0-testing"));
+    unsquashfs_options.addOption(std.SemanticVersion, "version", try std.SemanticVersion.parse(version_string_option orelse "0.0.0-testing"));
 
     var exe_mod = b.createModule(.{
         .root_source_file = b.path("src/bin/unsquashfs.zig"),

build.zig.zon

@@ -1,30 +1,7 @@
 .{
-    // This is the default name used by packages depending on this one. For
-    // example, when a user runs `zig fetch --save <url>`, this field is used
-    // as the key in the `dependencies` table. Although the user can choose a
-    // different name, most users will stick with this provided value.
-    //
-    // It is redundant to include "zig" in this name because it is already
-    // within the Zig package namespace.
-    .name = .zig_squashfs,
-    // 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",
-    // Together with name, this represents a globally unique package
-    // identifier. This field is generated by the Zig toolchain when the
-    // package is first created, and then *never changes*. This allows
-    // unambiguous detection of one package being an updated version of
-    // another.
-    //
-    // When forking a Zig project, this id should be regenerated (delete the
-    // field and run `zig build`) if the upstream project is still maintained.
-    // Otherwise, the fork is *hostile*, attempting to take control over the
-    // original project's identity. Thus it is recommended to leave the comment
-    // on the following line intact, so that it shows up in code reviews that
-    // modify the field.
-    .fingerprint = 0x527960c74dddb509, // Changing this has security and trust implications.
-    // Tracks the earliest Zig version that the package considers to be a
-    // supported use case.
+    .name = .squashfs,
+    .version = "0.0.1",
+    .fingerprint = 0x37ba29474b87f145, // Changing this has security and trust implications.
     .minimum_zig_version = "0.15.2",
     // This field is optional.
     // Each dependency must either provide a `url` and `hash`, or a `path`.
@@ -62,20 +39,12 @@
         //    .lazy = false,
         //},
     },
-    // Specifies the set of files and directories that are included in this package.
-    // Only files and directories listed here are included in the `hash` that
-    // is computed for this package. Only files listed here will remain on disk
-    // when using the zig package manager. As a rule of thumb, one should list
-    // files required for compilation plus any license(s).
-    // Paths are relative to the build root. Use the empty string (`""`) to refer to
-    // the build root itself.
-    // A directory listed here means that all files within, recursively, are included.
     .paths = .{
         "build.zig",
         "build.zig.zon",
         "src",
-        // For example...
-        //"LICENSE",
-        //"README.md",
+
+        "LICENSE",
+        "README.md",
     },
 }

src/bin/unsquashfs.zig

@@ -1,5 +1,6 @@
 const std = @import("std");
 const Writer = std.Io.Writer;
+const builtin = @import("builtin");
 
 const config = @import("config");
 const squashfs = @import("zig_squashfs");
@@ -64,9 +65,9 @@ fn handleArgs(alloc: std.mem.Allocator, out: *Writer) !void {
             extLoc = nxt.?;
             continue;
         } else if (std.mem.eql(u8, arg, "--version")) {
-            _ = try out.write("v");
-            try config.version_string.format(out);
-            _ = try out.write("\n");
+            _ = try out.write("unsquashfs version");
+            try config.version.format(out);
+            try out.print("\nBuilt using Zig {s} with {} backend in {} mode.\n", .{ builtin.zig_version_string, builtin.zig_backend, builtin.mode });
             std.process.cleanExit();
             return;
         }

src/file.zig

@@ -198,8 +198,7 @@ pub fn extract(self: *SfsFile, path: []const u8, options: ExtractionOptions) !vo
         }
     }
     defer if (ext_path.len > path.len) alloc.free(ext_path);
-    //TODO: switch to threaded version.
-    return self.inode.extractTo(self.archive, path, options);
+    return self.inode.extractToThreaded(self.archive, path, options, self.archive.thread_count);
 }
 
 /// Utility function.

src/inode.zig

@@ -133,6 +133,7 @@ fn entriesFromData(archive: *Archive, data: anytype) ![]DirEntry {
     return DirEntry.readDir(alloc, &meta.interface, data.size);
 }
 
+/// Extract the inode to the given path. Single threaded.
 pub fn extractTo(self: Inode, archive: *Archive, path: []const u8, options: ExtractionOptions) !void {
     switch (self.hdr.inode_type) {
         .dir, .ext_dir => {
@@ -175,20 +176,30 @@ const Perms = struct {
     mod_time: u32,
 };
 
-pub fn extractToThreaded(inode: Inode, archive: *Archive, path: []const u8, options: ExtractionOptions, threads: usize) !void {
-    _ = archive;
-    _ = path;
-    _ = options;
-    _ = threads;
-    switch (inode.hdr.inode_type) {}
+/// Extract the inode to the given path. Multi-threaded.
+/// Functions identically to extractTo on all but regular files and directories.
+///
+/// If threads <= 1, then this just calls extractTo.
+pub fn extractToThreaded(self: Inode, archive: *Archive, path: []const u8, options: ExtractionOptions, threads: usize) !void {
+    if (threads <= 1) return self.extractTo(archive, path, options);
+    std.debug.print("{}\n", .{threads});
+    @constCast(&threads).* = try std.Thread.getCpuCount();
+    std.debug.print("{}\n", .{threads});
+    switch (self.hdr.inode_type) {
+        .dir, .ext_dir => {},
+        .file, .ext_file => {},
+        .symlink, .ext_symlink => try self.extractSymlink(path),
+        else => try self.extractDevice(archive, path, options),
+    }
+    return error.TODO;
 }
 
 /// Extract threadedly the inode to the path.
-fn extractThread(inode: Inode, archive: *Archive, path: []const u8, options: ExtractionOptions, wg: *WaitGroup, pool: *Pool, perms: ?*std.ArrayList(Perms)) !void {
+fn extractThread(self: Inode, archive: *Archive, path: []const u8, options: ExtractionOptions, wg: *WaitGroup, pool: *Pool, perms: ?*std.ArrayList(Perms)) !void {
     _ = pool;
     _ = perms;
     _ = archive;
-    switch (inode.hdr.inode_type) {
+    switch (self.hdr.inode_type) {
         .dir, .ext_dir => {
             //TOOD
             return error.TODO;
@@ -199,11 +210,11 @@ fn extractThread(inode: Inode, archive: *Archive, path: []const u8, options: Ext
         },
         .symlink, .ext_symlink => {
             defer wg.finish();
-            try inode.extractSymlink(path);
+            try self.extractSymlink(path);
         },
         else => {
             defer wg.finish();
-            try inode.extractDevice(path, options.ignore_permissions);
+            try self.extractDevice(path, options.ignore_permissions);
         },
     }
 }