chore(common): add test for procfile

Author: nickchecan

Makefile

@@ -1,4 +1,4 @@
-APP_DIR := test/my-app-1
+APP_DIR := test/my-app-4
 BUILD_DIR := /tmp/uv-bp-build
 CACHE_DIR := /tmp/uv-bp-cache
 ENV_DIR := /tmp/uv-bp-env
@@ -35,4 +35,5 @@ start-local:
 			echo "Could not determine a web command to run locally."; \
 			exit 1; \
 		fi; \
+		WEB_CMD=$$(printf "%s" "$$WEB_CMD" | sed "s/^python /$(PYTHON_BIN) /"); \
 		eval "$$WEB_CMD"'

bin/release

@@ -9,12 +9,8 @@ else
   PYTHON_BIN="python"
 fi
 
-# If the app provides its own Procfile, let Cloud Foundry use that.
-if [ -f "Procfile" ]; then
-  exit 0
-# Otherwise, prefer a script named after `project.name`, then fall back to `start`.
-elif [ -n "$PYTHON_BIN" ] && [ -f "pyproject.toml" ]; then
-  START_TARGET=$("$PYTHON_BIN" -c '
+resolve_script_target() {
+  "$PYTHON_BIN" -c '
 import sys
 try:
     import tomllib
@@ -29,25 +25,40 @@ project_name = project.get("name", "")
 scripts = project.get("scripts", {})
 
 print(scripts.get(project_name) or scripts.get("start", ""))
-')
-
-  if [ -n "$START_TARGET" ]; then
-    MODULE_NAME="${START_TARGET%%:*}"
-    FUNCTION_NAME="${START_TARGET##*:}"
-    DEFAULT_WEB_PROCESS="${PYTHON_BIN} -c \"from ${MODULE_NAME} import ${FUNCTION_NAME}; ${FUNCTION_NAME}()\""
-  elif [ -f "main.py" ]; then
-    DEFAULT_WEB_PROCESS="${PYTHON_BIN} main.py"
-  elif [ -f "app.py" ]; then
-    DEFAULT_WEB_PROCESS="${PYTHON_BIN} app.py"
-  else
-    DEFAULT_WEB_PROCESS="${PYTHON_BIN} -m uvicorn main:app --host 0.0.0.0 --port \${PORT:-8000}"
+'
+}
+
+build_python_entrypoint() {
+  local target="$1"
+  local module_name="${target%%:*}"
+  local function_name="${target##*:}"
+  echo "${PYTHON_BIN} -c \"from ${module_name} import ${function_name}; ${function_name}()\""
+}
+
+DEFAULT_WEB_PROCESS=""
+
+# If the app provides its own Procfile, let Cloud Foundry use that.
+if [ -f "Procfile" ]; then
+  exit 0
+fi
+
+# Prefer a script named after `project.name`, then fall back to `start`.
+if [ -f "pyproject.toml" ]; then
+  SCRIPT_TARGET="$(resolve_script_target)"
+  if [ -n "$SCRIPT_TARGET" ]; then
+    DEFAULT_WEB_PROCESS="$(build_python_entrypoint "$SCRIPT_TARGET")"
   fi
-# If pyproject.toml is missing or cannot be parsed here, fall back to common app files.
-elif [ -f "main.py" ]; then
+fi
+
+if [ -z "$DEFAULT_WEB_PROCESS" ] && [ -f "main.py" ]; then
   DEFAULT_WEB_PROCESS="${PYTHON_BIN} main.py"
-elif [ -f "app.py" ]; then
+fi
+
+if [ -z "$DEFAULT_WEB_PROCESS" ] && [ -f "app.py" ]; then
   DEFAULT_WEB_PROCESS="${PYTHON_BIN} app.py"
-else
+fi
+
+if [ -z "$DEFAULT_WEB_PROCESS" ]; then
   DEFAULT_WEB_PROCESS="${PYTHON_BIN} -m uvicorn main:app --host 0.0.0.0 --port \${PORT:-8000}"
 fi
 

test/my-app-4/.python-version

@@ -0,0 +1 @@
+3.13

test/my-app-4/Procfile

@@ -0,0 +1 @@
+web: python main.py

test/my-app-4/main.py

@@ -0,0 +1,12 @@
+from fastapi import FastAPI
+import uvicorn
+
+app = FastAPI()
+
+
+@app.get("/")
+def hello_world() -> dict[str, str]:
+    return {"message": "Hello, World!"}
+
+if __name__ == "__main__":
+    uvicorn.run(app, host="0.0.0.0", port=8000)

test/my-app-4/pyproject.toml

@@ -0,0 +1,10 @@
+[project]
+name = "my-app-4"
+version = "0.1.0"
+description = "Add your description here"
+readme = "README.md"
+requires-python = ">=3.13"
+dependencies = [
+    "fastapi>=0.135.3",
+    "uvicorn[standard]>=0.44.0",
+]