feat: install dependencies with custom cert behind https proxy (#9)

installer.py

@@ -0,0 +1,62 @@
+import os
+import logging
+import subprocess
+import sys
+
+logger = logging.getLogger()
+handler = logging.StreamHandler(sys.stdout)
+logger.setLevel(logging.INFO)
+logger.addHandler(handler)
+
+proxy_url = os.environ.get("ALL_PROXY")
+if proxy_url is not None:
+    # Just try to check if proxy is http or https
+    # This does not validate the full url format
+    scheme = proxy_url.split(":")[0]
+
+    if scheme == "https":
+        logger.info("Creating certificate bundle with proxy root CA, and installing 'boto3', 'awsiotsdk' and 'urllib3>=1.26.7'")
+        try:
+            import certifi
+
+        except ImportError:
+            try:
+                from pip._vendor import certifi
+            except Exception:
+                logger.exception(
+                    "Error creating certificate bundle with proxy root CA. Python certifi module is not available on the device")
+                sys.exit(1)
+        try:
+            with open(certifi.where(), 'r') as certify_root_ca, open(os.environ.get("GG_ROOT_CA_PATH"), 'r') as gg_root_ca, open('./ca-bundle.crt', 'w') as custom_cert_bundle:
+                custom_cert_bundle.write(certify_root_ca.read())
+                custom_cert_bundle.write(gg_root_ca.read())
+        except Exception:
+            logger.exception("Error creating certificate bundle with proxy root CA")
+            sys.exit(1)
+        try:
+            subprocess.check_call(
+                [sys.executable, '-m', 'pip', 'install', '--cert', './ca-bundle.crt', 'boto3', 'awsiotsdk', 'urllib3>=1.26.7', '--user'])
+            sys.exit(0)
+        except Exception:
+            logger.exception(
+                "Error installing dependencies. Please set 'UseInstaller' to 'False' and pre-install 'boto3', 'awsiotsdk' and 'urllib3>=1.26.7'")
+            sys.exit(1)
+
+    if scheme == "http":
+        logger.info("Installing 'boto3', 'awsiotsdk' and 'urllib3>=1.26.7'")
+        try:
+            subprocess.check_call(
+                [sys.executable, '-m', 'pip', 'install', 'boto3', 'awsiotsdk', 'urllib3>=1.26.7', '--user'])
+            sys.exit(0)
+        except Exception:
+            logger.exception(
+                "Error installing dependencies. Please set 'UseInstaller' to 'False' and pre-install 'boto3', 'awsiotsdk' and 'urllib3>=1.26.7'")
+            sys.exit(1)
+
+logger.info("Installing 'boto3' and 'awsiotsdk'")
+try:
+    subprocess.check_call([sys.executable, '-m', 'pip', 'install', 'boto3', 'awsiotsdk', '--user'])
+except Exception:
+    logger.exception(
+        "Error installing dependencies. Please set 'UseInstaller' to 'False' and pre-install 'boto3' and 'awsiotsdk'")
+    sys.exit(1)