feat: version command

Author: 0byte-coding

build.zig

@@ -26,6 +26,13 @@ pub fn build(b: *std.Build) void {
         .root_source_file = b.path("asset/root.zig"),
     });
 
+    // Build options module (version info)
+    const build_options = b.addOptions();
+    // Read version from build.zig.zon
+    const build_zon = @import("build.zig.zon");
+    build_options.addOption([]const u8, "version", build_zon.version);
+    const build_options_mod = build_options.createModule();
+
     if (cross_compile) {
         // Build for all targets
         for (cross_targets) |t| {
@@ -44,6 +51,7 @@ pub fn build(b: *std.Build) void {
                     .imports = &.{
                         .{ .name = "argzon", .module = argzon_mod },
                         .{ .name = "asset", .module = asset_mod },
+                        .{ .name = "build_options", .module = build_options_mod },
                     },
                 }),
             });
@@ -78,6 +86,7 @@ pub fn build(b: *std.Build) void {
                 .imports = &.{
                     .{ .name = "argzon", .module = argzon_mod },
                     .{ .name = "asset", .module = asset_mod },
+                    .{ .name = "build_options", .module = build_options_mod },
                 },
             }),
         });

build.zig.zon

@@ -9,7 +9,7 @@
     .name = .shgit,
     // 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",
+    .version = "0.1.4",
     // 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

src/args.zon

@@ -97,5 +97,9 @@
             .name = "init",
             .description = "Initialize shgit in an existing directory structure",
         },
+        .{
+            .name = "version",
+            .description = "Show shgit version",
+        },
     },
 }

src/commands/version.zig

@@ -0,0 +1,26 @@
+const std = @import("std");
+const build_options = @import("build_options");
+
+const log = std.log.scoped(.version);
+
+pub fn execute(allocator: std.mem.Allocator, verbose: bool) !void {
+    _ = allocator;
+    _ = verbose;
+
+    // Get version from build.zig.zon
+    const version = try std.SemanticVersion.parse(build_options.version);
+
+    var stdout_buf: [10 * build_options.version.len]u8 = undefined;
+    var stdout_buffered = std.fs.File.stdout().writer(&stdout_buf);
+    const stdout = &stdout_buffered.interface;
+
+    try stdout.print("shgit v{}.{}.{}", .{ version.major, version.minor, version.patch });
+    if (version.pre) |pre| {
+        try stdout.print("-{s}", .{pre});
+    }
+    if (version.build) |build| {
+        try stdout.print("+{s}", .{build});
+    }
+    try stdout.print("\n", .{});
+    try stdout.flush();
+}

src/main.zig

@@ -7,6 +7,7 @@ const link = @import("commands/link.zig");
 const worktree = @import("commands/worktree.zig");
 const sync = @import("commands/sync.zig");
 const init_cmd = @import("commands/init.zig");
+const version = @import("commands/version.zig");
 
 const log = std.log.scoped(.shgit);
 
@@ -43,6 +44,7 @@ pub fn main() !void {
             .worktree => |wt_args| try worktree.execute(gpa, wt_args, verbose),
             .sync => try sync.execute(gpa, verbose),
             .init => try init_cmd.execute(gpa, verbose),
+            .version => try version.execute(gpa, verbose),
         }
     } else {
         var stdout_buf: [argzon.MAX_BUF_SIZE]u8 = undefined;