image: create new module from {image,boot,fastboot,flash}.py

image/fastboot.py

@@ -0,0 +1,37 @@
+import logging
+import subprocess
+
+
+def fastboot_erase_dtbo():
+    logging.info("Fastboot: Erasing DTBO")
+    subprocess.run(
+        [
+            'fastboot',
+            'erase',
+            'dtbo',
+        ],
+        capture_output=True,
+    )
+
+
+def fastboot_flash(partition, file):
+    logging.info(f"Fastboot: Flashing {file} to {partition}")
+    result = subprocess.run([
+        'fastboot',
+        'flash',
+        partition,
+        file,
+    ])
+    if result.returncode != 0:
+        raise Exception(f'Failed to flash {file}')
+
+
+def fastboot_boot(file):
+    logging.info(f"Fastboot: booting {file}")
+    result = subprocess.run([
+        'fastboot',
+        'boot',
+        file,
+    ])
+    if result.returncode != 0:
+        raise Exception(f'Failed to boot {file} using fastboot')