From 9fc0112f8c6445eaf7fdf7e51b1ef2449caae5ca Mon Sep 17 00:00:00 2001
From: Tad Hardesty <tad@platymuus.com>
Date: Fri, 15 Nov 2019 22:32:26 -0800
Subject: [PATCH] Add version info to editor help menu

---
 src/editor/Cargo.toml |  4 ++++
 src/editor/build.rs   | 25 +++++++++++++++++++++++--
 src/editor/main.rs    | 14 +++++++++++---
 3 files changed, 38 insertions(+), 5 deletions(-)

diff --git a/src/editor/Cargo.toml b/src/editor/Cargo.toml
index dc0f1968..f35cee59 100644
--- a/src/editor/Cargo.toml
+++ b/src/editor/Cargo.toml
@@ -31,3 +31,7 @@ slice-of-array = "0.2.0"
 [dependencies.nfd]
 git = "https://github.com/SpaceManiac/nfd-rs"
 branch = "zenity"
+
+[build-dependencies]
+chrono = "0.4.0"
+git2 = { version = "0.10", default-features = false }
diff --git a/src/editor/build.rs b/src/editor/build.rs
index 1becf4e1..fa2ca3cf 100644
--- a/src/editor/build.rs
+++ b/src/editor/build.rs
@@ -1,8 +1,23 @@
-use std::process::Command;
+extern crate chrono;
+extern crate git2;
+
 use std::env;
-use std::path::Path;
+use std::fs::File;
+use std::io::Write;
+use std::process::Command;
+use std::path::{Path, PathBuf};
 
 fn main() {
+    // build info
+    let out_dir = PathBuf::from(env::var_os("OUT_DIR").unwrap());
+    let mut f = File::create(&out_dir.join("build-info.txt")).unwrap();
+
+    if let Ok(commit) = read_commit() {
+        writeln!(f, "commit: {}", commit).unwrap();
+    }
+    writeln!(f, "build date: {}", chrono::Utc::today()).unwrap();
+
+    // windres icon
     if cfg!(windows) {
         let out_dir = env::var("OUT_DIR").ok().expect("can't find out_dir");
 
@@ -37,3 +52,9 @@ fn main() {
         println!("cargo:rustc-link-lib=static=editor_rc");
     }
 }
+
+fn read_commit() -> Result<String, git2::Error> {
+    let repo = git2::Repository::discover(".")?;
+    let hash = repo.head()?.peel_to_commit()?.id().to_string();
+    Ok(hash)
+}
diff --git a/src/editor/main.rs b/src/editor/main.rs
index 24f016ea..e75a68d2 100644
--- a/src/editor/main.rs
+++ b/src/editor/main.rs
@@ -570,9 +570,17 @@ impl EditorScene {
                 });
             }
             ui.menu(im_str!("Help"), true, || {
-                MenuItem::new(im_str!("About SpacemanDMM"))
-                    .enabled(false)
-                    .build(ui);
+                ui.menu(im_str!("About SpacemanDMM"), true, || {
+                    ui.bullet_text(&im_str!(
+                        "{} {}  Copyright (C) 2017-2019  Tad Hardesty",
+                        env!("CARGO_PKG_NAME"),
+                        env!("CARGO_PKG_VERSION"),
+                    ));
+                    ui.bullet_text(&im_str!("{}", include_str!(concat!(env!("OUT_DIR"), "/build-info.txt"))));
+                    ui.bullet_text(im_str!("This program comes with ABSOLUTELY NO WARRANTY. This is free software,\n\
+                        and you are welcome to redistribute it under the conditions of the GNU\n\
+                        General Public License version 3."));
+                });
                 MenuItem::new(im_str!("Open-source licenses"))
                     .enabled(false)
                     .build(ui);