From a2c2a6d6d32d00590430a2fb5be1384bd9c3a467 Mon Sep 17 00:00:00 2001
From: Casper Meijn <casper@meijn.net>
Date: Thu, 19 Dec 2024 14:15:39 +0100
Subject: [PATCH] build: Make MSRV explicit

Add `rust-version` to `Cargo.toml`. Verify this MSRV by adding a CI check that builds using that rust compiler version.

The current MSRV is 1.61. Trying to build with 1.60 results in:
```
error: package `syn v2.0.90` cannot be built because it requires rustc 1.61 or newer, while the currently active rustc version is 1.60.0
```
---
 .github/workflows/ci.yml | 9 +++++++++
 Cargo.toml               | 1 +
 2 files changed, 10 insertions(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e502937..043a08f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -41,3 +41,12 @@ jobs:
         run: taplo lint
       - name: taplo fmt
         run: taplo fmt --check --diff
+
+  msrv:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: taiki-e/install-action@cargo-hack
+      - uses: Swatinem/rust-cache@v2
+      - name: check with all-features
+        run: cargo hack --rust-version --no-private --no-dev-deps check --all-features
diff --git a/Cargo.toml b/Cargo.toml
index bdff566..f0ac947 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,6 +13,7 @@ documentation = "https://docs.rs/graphql-parser"
 version = "0.4.1"
 authors = ["Paul Colomiets <paul@colomiets.name>"]
 edition = "2018"
+rust-version = "1.61"
 
 [dependencies]
 combine = "4.6.6"