From c5e0b6fa03e2a9a824383dd03c940ff093279035 Mon Sep 17 00:00:00 2001
From: rabite <rabite@posteo.de>
Date: Sun, 30 Jun 2019 11:41:32 +0200
Subject: [PATCH] check for nightly compiler in build.rs

---
 Cargo.lock | 25 +++++++++++++++++++++++++
 Cargo.toml |  4 ++++
 build.rs   | 26 ++++++++++++++++++++++++--
 3 files changed, 53 insertions(+), 2 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 040fb91..6ae7afd 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -463,6 +463,7 @@ dependencies = [
  "parse-ansi 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "pathbuftools 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rayon 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "signal-notify 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "systemstat 0.1.4 (git+https://github.com/myfreeweb/systemstat?tag=v0.1.4)",
  "termion 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1118,6 +1119,14 @@ name = "rustc-demangle"
 version = "0.1.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "rustc_version"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "same-file"
 version = "1.0.4"
@@ -1136,6 +1145,19 @@ name = "scopeguard"
 version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "semver"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "semver-parser"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "signal-notify"
 version = "0.1.3"
@@ -1499,9 +1521,12 @@ dependencies = [
 "checksum regex 1.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "0b2f0808e7d7e4fb1cb07feb6ff2f4bc827938f24f8c2e6a3beb7370af544bdd"
 "checksum regex-syntax 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)" = "9d76410686f9e3a17f06128962e0ecc5755870bb890c34820c7af7f1db2e1d48"
 "checksum rustc-demangle 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)" = "a7f4dccf6f4891ebcc0c39f9b6eb1a83b9bf5d747cb439ec6fba4f3b977038af"
+"checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
 "checksum same-file 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8f20c4be53a8a1ff4c1f1b2bd14570d2f634628709752f0702ecdd2b3f9a5267"
 "checksum scoped_threadpool 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "1d51f5df5af43ab3f1360b429fa5e0152ac5ce8c0bd6485cae490332e96846a8"
 "checksum scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "94258f53601af11e6a49f722422f6e3425c52b06245a5cf9bc09908b174f5e27"
+"checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
+"checksum semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 "checksum signal-notify 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "847fbedad7c2e6fbb6077befa1fa61a6336658eaae2d9fe66cb94a0024742f4e"
 "checksum siphasher 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "0b8de496cf83d4ed58b6be86c3a275b8602f6ffe98d3024a869e124147a9a3ac"
 "checksum slab 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c111b5bd5695e56cffe5129854aa230b39c93a305372fdbb2668ca2394eea9f8"
diff --git a/Cargo.toml b/Cargo.toml
index 4a146b5..da390ce 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -40,6 +40,10 @@ pathbuftools = "0.1"
 clap = "2.33"
 mime = "0.3.13"
 
+[build-dependencies]
+termion = "1.5.1"
+rustc_version = "0.2.3"
+
 [features]
 default = ["video"]
 video = []
diff --git a/build.rs b/build.rs
index 07f1acb..6134a9c 100644
--- a/build.rs
+++ b/build.rs
@@ -1,6 +1,26 @@
+extern crate termion;
+extern crate rustc_version;
+
+use rustc_version::{version_meta, Channel};
+
 use std::process::Command;
 
-fn main() {
+
+fn main() -> Result<(),()> {
+    // Bail out if compiler isn't a nightly
+    if let Ok(false) = version_meta().map(|m| m.channel == Channel::Nightly) {
+        eprint!("{}", termion::color::Fg(termion::color::Red));
+        eprint!("{}", termion::style::Bold);
+        eprint!("{}", termion::style::Underline);
+        eprintln!("NIHGTLY COMPILER required");
+        eprintln!("Please install a nighlty compiler to proceed: https://rustup.rs/");
+        eprint!("{}", termion::style::Reset);
+        eprintln!("rustup toolchain install nightly");
+        eprintln!("source ~/.cargo/env");
+
+        return Err(());
+    }
+
     // rename so we can just extract this into config dir later
     Command::new("cp")
         .args("-a extra hunter".split(" "))
@@ -15,5 +35,7 @@ fn main() {
 
     // delete directory we just compressed
     std::fs::remove_dir_all("hunter")
-        .expect("Couldn't delete temporary config directory \"hunter\"")
+        .expect("Couldn't delete temporary config directory \"hunter\"");
+
+    return Ok(());
 }