src/main.zig

@@ -1,12 +1,35 @@
-const stdout = std.io.getStdOut().writer();
+pub fn main() !void {
+    clear();
 
-fn clear() !void {
-    try stdout.print("\u{001b}[H\u{001b}[J", .{});
+    var gpa = std.heap.GeneralPurposeAllocator(.{}).init;
+    defer _ = gpa.deinit();
+
+    const allocator = gpa.allocator();
+
+    var ln = Linenoise.init(allocator);
+    defer ln.deinit();
+
+    const p = try getPrompt(allocator);
+    defer allocator.free(p);
+
+    while (try ln.linenoise(p)) |input| {
+        defer allocator.free(input);
+        if (input.len > 0) {
+            try ln.history.add(input);
+            const command = try tokenizeCommand(input, allocator);
+            defer allocator.free(command);
+            _ = runCommand(command, allocator) catch |err| switch (err) {
+                error.FileNotFound => print("mash: {s}: command not found\n", .{command[0]}),
+                error.AccessDenied => print("mash: {s}: Permission denied\n", .{command[0]}),
+                else => print("Unkown error: {}\n", .{err}),
+            };
+        }
+    }
 }
 
 fn getPrompt(allocator: Allocator) ![]const u8 {
     const script = @embedFile("./get_prompt.bash");
-    const result = try std.process.Child.run(.{
+    const result = try process.Child.run(.{
         .allocator = allocator,
         .argv = &[_][]const u8{ "bash", "-i", "-c", script },
     });
@@ -15,7 +38,7 @@ fn getPrompt(allocator: Allocator) ![]const u8 {
 }
 
 fn runCommand(command: [][]const u8, allocator: Allocator) !u8 {
-    var child = std.process.Child.init(command, allocator);
+    var child = process.Child.init(command, allocator);
     const result = try child.spawnAndWait();
     return result.Exited;
 }
@@ -31,34 +54,18 @@ fn tokenizeCommand(command: []const u8, allocator: Allocator) ![][]const u8 {
     return argv_array_list.toOwnedSlice();
 }
 
-pub fn main() !void {
-    try clear();
-
-    var gpa = std.heap.GeneralPurposeAllocator(.{}).init;
-    defer _ = gpa.deinit();
-
-    const allocator = gpa.allocator();
-
-    var ln = Linenoise.init(allocator);
-    defer ln.deinit();
-
-    const p = try getPrompt(allocator);
-    defer allocator.free(p);
-
-    while (try ln.linenoise(p)) |input| {
-        defer allocator.free(input);
-        try ln.history.add(input);
-        const command = try tokenizeCommand(input, allocator);
-        defer allocator.free(command);
-        _ = runCommand(command, allocator) catch |err| switch (err) {
-            error.FileNotFound => stdout.print("mash: {s}: command not found", .{command[0]}) catch unreachable,
-            else => std.log.debug("Unkown error: {}", .{err}),
-        };
+fn clear() void {
+    print("\u{001b}[H\u{001b}[J", .{});
 }
+
+fn print(comptime fmt: []const u8, args: anytype) void {
+    stdout.print(fmt, args) catch unreachable;
 }
 
 const std = @import("std");
+const stdout = std.io.getStdOut().writer();
 const tokenizeAny = std.mem.tokenizeAny;
+const process = std.process;
 const Allocator = std.mem.Allocator;
 const ArrayList = std.ArrayList;
 const Linenoise = @import("linenoise").Linenoise;