chore: Add Justfile

Signed-off-by: Awiteb <a@4rs.nl>

Justfile

@@ -0,0 +1,30 @@
+# This justfile is for the contrbutors of this project, not for the end user.
+#
+# Requirements for this justfile:
+# - Linux distribution
+# - just (Of course) <https://github.com/casey/just>
+# - cargo (For the build and tests) <https://doc.rust-lang.org/cargo/getting-started/installation.html>
+
+set shell := ["/usr/bin/bash", "-c"]
+
+JUST_EXECUTABLE := "just -u -f " + justfile()
+header := "Available tasks:\n"
+# Get the MSRV from the Cargo.toml
+msrv := `cat Cargo.toml | grep "rust-version" | sed 's/.*"\(.*\)".*/\1/'`
+
+
+_default:
+    @{{JUST_EXECUTABLE}} --list-heading "{{header}}" --list
+
+# Run the CI
+@ci: && msrv
+    cargo build -q
+    cargo fmt -- --check
+    cargo clippy -- -D warnings
+
+# Check that the current MSRV is correct
+@msrv:
+    rustup toolchain install {{msrv}}
+    echo "Checking MSRV ({{msrv}})"
+    cargo +{{msrv}} check -q
+    echo "MSRV is correct"