Break dev scripts into modules

.gitignore

@@ -21,3 +21,4 @@ Cargo.lock
 *.pdb
 
 /.python_venv
+__pycache__

dev.py

@@ -1,84 +1,25 @@
 import argparse
 import os
 import subprocess
-import shutil
 import sys
-import time
 
 root_dir = sys.path[0]
 
 
 def devupdate(args):
-    subprocess.check_call(
-        [
-            sys.executable,
-            '-m',
-            'pip',
-            'install',
-            '-r',
-            os.path.join(root_dir, 'dev-python-requirements.txt'),
-        ]
-    )
+    with subprocess.Popen(
+            [sys.executable, '-m', 'pip', 'install', '-r',
+             os.path.join(root_dir, 'dev-python-requirements.txt'), ],
+            stdout=subprocess.PIPE, stderr=subprocess.STDOUT, bufsize=1,
+            universal_newlines=True) as pip:
+        for line in pip.stdout:
+            print(line, end='', flush=True)
 
 
 def run(args):
-    import docker
-
-    POSTGRES_USER = 'locality'
-    POSTGRES_PASSWORD = 'wkyhjofg2837f'
-    POSTGRES_DB = 'locality'
-
-    postgres_env = {
-        'POSTGRES_USER': POSTGRES_USER,
-        'POSTGRES_PASSWORD': POSTGRES_PASSWORD,
-        'POSTGRES_DB': POSTGRES_DB,
-    }
-
-    locality_env = {
-        'LOCALITY_DATABASE_URL': 'postgres://{}:{}@localhost/{}'.format(
-            POSTGRES_USER,
-            POSTGRES_PASSWORD,
-            POSTGRES_DB),
-        'LOCALITY_STATIC_FILE_PATH': os.path.join(
-            root_dir,
-            'static'),
-        'LOCALITY_HMAC_SECRET': 'iknf4390-8guvmr3'
-    }
-
-    docker_client = docker.from_env()
-    postgres_container = docker_client.containers.run(
-        'postgres:14.11',
-        environment=postgres_env,
-        detach=True,
-        ports={'5432/tcp': ('127.0.0.1', 5432)},
-    )
-    try:
-        docker_stream = postgres_container.attach(stream=True)
-        for line_binary in docker_stream:
-            line = line_binary.decode('utf-8')
-            print(line)
-            if 'listening on IPv4 address "0.0.0.0", port 5432' in line:
-                break
-        for line_binary in docker_stream:
-            line = line_binary.decode('utf-8')
-            print(line)
-            if 'database system is ready to accept connections' in line:
-                break
-
-        cargo_bin = shutil.which('cargo')
-        locality_process = subprocess.Popen(
-            [cargo_bin, 'run'], env=locality_env, cwd=root_dir
-        )
-
-        try:
-            while locality_process.poll() is None:
-                time.sleep(0.5)
-        finally:
-            if locality_process.poll() is None:
-                locality_process.terminate()
-    finally:
-        postgres_container.stop()
-        postgres_container.remove()
+    import scripts.run
+    scripts.run.ROOT_DIR = root_dir  # TODO: FIXME
+    scripts.run.run(args)
 
 
 parser = argparse.ArgumentParser()

scripts/postgres_container.py

@@ -0,0 +1,48 @@
+import docker
+import os
+
+
+class PostgresContainer():
+    def __init__(self):
+        self.postgres_user = 'locality'
+        self.postgres_password = 'wkyhjofg2837f'
+        self.postgres_db = 'locality'
+
+    def get_url(self):
+        return 'postgres://{}:{}@localhost/{}'.format(
+            self.postgres_user,
+            self.postgres_password,
+            self.postgres_db)
+
+    def __enter__(self):
+        postgres_env = {
+            'POSTGRES_USER': self.postgres_user,
+            'POSTGRES_PASSWORD': self.postgres_password,
+            'POSTGRES_DB': self.postgres_db,
+        }
+
+        self.docker_client = docker.from_env()
+        self.postgres_container = self.docker_client.containers.run(
+            'postgres:14.11',
+            environment=postgres_env,
+            detach=True,
+            ports={'5432/tcp': ('127.0.0.1', 5432)},
+        )
+
+        self.docker_stream = self.postgres_container.attach(stream=True)
+        for line_binary in self.docker_stream:
+            line = line_binary.decode('utf-8')
+            print(line)
+            if 'listening on IPv4 address "0.0.0.0", port 5432' in line:
+                break
+        for line_binary in self.docker_stream:
+            line = line_binary.decode('utf-8')
+            print(line)
+            if 'database system is ready to accept connections' in line:
+                break
+
+        return self
+
+    def __exit__(self, type, value, traceback):
+        self.postgres_container.stop()
+        self.postgres_container.remove()

scripts/run.py

@@ -0,0 +1,32 @@
+import os
+import shutil
+import subprocess
+import time
+
+from .postgres_container import PostgresContainer
+
+ROOT_DIR = None
+
+
+def run(args):
+    global ROOT_DIR
+    with PostgresContainer() as postgres:
+        locality_env = {
+            'LOCALITY_DATABASE_URL': postgres.get_url(),
+            'LOCALITY_STATIC_FILE_PATH': os.path.join(
+                ROOT_DIR,
+                'static'),
+            'LOCALITY_HMAC_SECRET': 'iknf4390-8guvmr3'
+        }
+
+        cargo_bin = shutil.which('cargo')
+        locality_process = subprocess.Popen(
+            [cargo_bin, 'run'], env=locality_env, cwd=ROOT_DIR
+        )
+
+        try:
+            while locality_process.poll() is None:
+                time.sleep(0.5)
+        finally:
+            if locality_process.poll() is None:
+                locality_process.terminate()