Adds justfile to build everything

justfile

@@ -0,0 +1,20 @@
+release := ""
+cargo_flags := if release != "" { "--release" } else { "" }
+
+default: run
+
+build_user_prog prog:
+    cd {{ "user" / prog }} && \
+    RUSTFLAGS="-C relocation-model=pic" cargo b {{ cargo_flags }}
+    riscv64-elf-objcopy -O binary {{ "target/riscv64/debug" / prog }} {{ "user" / prog / prog + ".mem" }}
+
+build: (map_dir "user" "build_user_prog")
+    cargo b {{ cargo_flags }}
+
+run: build
+    cargo r {{ cargo_flags }} --bin kernel-rust
+
+map_dir dir recipe:
+    @for file in `ls {{ dir }}`; do \
+        just cargo_flags={{ cargo_flags }} {{ recipe }} $file ; \
+    done