From 1a14f588d78347860bac9d42e80375598bcf05cb Mon Sep 17 00:00:00 2001
From: Uko Kokņevičs
Date: Tue, 28 Dec 2021 22:17:19 +0200
Subject: Added logging support

---
 src/main.zig | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

(limited to 'src/main.zig')

diff --git a/src/main.zig b/src/main.zig
index 9c81776..89c72f0 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -2,14 +2,54 @@ const std = @import("std");
 
 const Allocator = std.mem.Allocator;
 const Editor = @import("Editor.zig");
+const File = std.fs.File;
 const GPA = std.heap.GeneralPurposeAllocator(.{});
 const RawMode = @import("RawMode.zig");
 
+var log_file: ?File = null;
+
+pub fn log(
+    comptime level: std.log.Level,
+    comptime scope: @TypeOf(.EnumLiteral),
+    comptime format: []const u8,
+    args: anytype,
+) void {
+    const file = if (log_file) |f| f else std.io.getStdErr();
+
+    const writer = file.writer();
+
+    const prefix = switch (scope) {
+        .default => "[" ++ level.asText() ++ "] ",
+        else => "[" ++ @tagName(scope) ++ ":" ++ level.asText() ++ "] ",
+    };
+
+    nosuspend writer.print(prefix ++ format ++ "\n", args) catch return;
+}
+
 pub fn main() !void {
     var gpa = GPA{};
     defer _ = gpa.deinit();
     const allocator = gpa.allocator();
 
+    const log_file_name = try std.fmt.allocPrint(
+        allocator,
+        "/tmp/es.{}.log",
+        .{std.os.linux.getpid()},
+    );
+    defer {
+        std.log.info("Logs in {s}", .{log_file_name});
+        allocator.free(log_file_name);
+    }
+
+    log_file = try std.fs.createFileAbsolute(
+        log_file_name,
+        .{ .exclusive = true, .truncate = true },
+    );
+    defer {
+        log_file.?.close();
+        log_file = null;
+    }
+
     const raw_mode = try RawMode.init();
     defer raw_mode.deinit();
 
-- 
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