feat: start git client module

src/git.zig

@@ -0,0 +1,21 @@
+const std = @import("std");
+const tp = @import("thespian");
+const shell = @import("shell");
+
+const git_binary = "git";
+
+pub fn get_current_branch(allocator: std.mem.Allocator) !void {
+    const git_current_branch_cmd = tp.message.fmt(.{ git_binary, "rev-parse", "--abbrev-ref", "HEAD" });
+    const handlers = struct {
+        fn out(_: usize, parent: tp.pid_ref, _: []const u8, output: []const u8) void {
+            var it = std.mem.splitScalar(u8, output, '\n');
+            while (it.next()) |line| if (line.len > 0)
+                parent.send(.{ "git", "current_branch", line }) catch {};
+        }
+    };
+    try shell.execute(allocator, git_current_branch_cmd, .{
+        .out = handlers.out,
+        .err = shell.log_err_handler,
+        .exit = shell.log_exit_err_handler,
+    });
+}