Add build script

Add requests optional dependency in requirements.

Author: wszdexdrf

.github/workflows/main.yml

@@ -43,8 +43,6 @@ jobs:
       with:
         python-version: '3.9'
         cache: 'pip'
-    - name: Install python dependencies
-      run: pip install -r requirements.txt
     - name: Set default toolchain
       run: rustup default ${{ matrix.rust.version }}
     - name: Set profile

build.rs

@@ -0,0 +1,7 @@
+use std::process::Command;
+fn main() {
+    Command::new("pip")
+        .args(vec!["install", "-r", "requirements.txt"])
+        .output()
+        .expect("failed to install library requirements");
+}

requirements.txt

@@ -1,2 +1,3 @@
 hwi>=2.1.1,<3
 protobuf==3.20.1
+requests>=2.27.1