feat: bench validate-dependencies command (frappe#1534)

This validates all `frappe-dependencies` and exits with 1 if any of
specifications fail.

This will be internal feature for FC for now. If this works well we can
make the validation fail during install-app itself without requiring any
additional command/steps.

bench/app.py

@@ -308,7 +308,7 @@ def get_pyproject(self) -> Optional[dict]:
 		self.pyproject = get_pyproject(pyproject_path)
 		return self.pyproject
 
-	def validate_app_dependencies(self) -> None:
+	def validate_app_dependencies(self, throw=False) -> None:
 		pyproject = self.get_pyproject() or {}
 		deps: Optional[dict] = (
 			pyproject.get("tool", {}).get("bench", {}).get("frappe-dependencies")
@@ -317,7 +317,7 @@ def validate_app_dependencies(self) -> None:
 			return
 
 		for dep, version in deps.items():
-			validate_dependency(self, dep, version)
+			validate_dependency(self, dep, version, throw=throw)
 
 	"""
 	Get App Cache
@@ -489,16 +489,13 @@ def can_frappe_use_cached(app: App) -> bool:
 		return False
 
 
-def validate_dependency(app: App, dep: str, req_version: str) -> None:
+def validate_dependency(app: App, dep: str, req_version: str, throw=False) -> None:
 	dep_path = Path(app.bench.name) / "apps" / dep
 	if not dep_path.is_dir():
-		click.secho(
-			f"Required frappe-dependency '{dep}' not found. "
-			f"Aborting '{app.name}' installation. "
-			f"Please install '{dep}' first and retry",
-			fg="red",
-		)
-		sys.exit(1)
+		click.secho(f"Required frappe-dependency '{dep}' not found.", fg="yellow")
+		if throw:
+			sys.exit(1)
+		return
 
 	dep_version = get_dep_version(dep, dep_path)
 	if not dep_version:
@@ -508,9 +505,12 @@ def validate_dependency(app: App, dep: str, req_version: str) -> None:
 		click.secho(
 			f"Installed frappe-dependency '{dep}' version '{dep_version}' "
 			f"does not satisfy required version '{req_version}'. "
-			f"App '{app.name}' might not work as expected",
+			f"App '{app.name}' might not work as expected.",
 			fg="yellow",
 		)
+		if throw:
+			click.secho(f"Please install '{dep}{req_version}' first and retry", fg="red")
+			sys.exit(1)
 
 
 def get_dep_version(dep: str, dep_path: Path) -> Optional[str]:

bench/commands/__init__.py

@@ -46,6 +46,7 @@ def bench_command(bench_path="."):
 	new_app,
 	pip,
 	remove_app,
+	validate_dependencies,
 )
 
 bench_command.add_command(init)
@@ -56,6 +57,7 @@ def bench_command(bench_path="."):
 bench_command.add_command(exclude_app_for_update)
 bench_command.add_command(include_app_for_update)
 bench_command.add_command(pip)
+bench_command.add_command(validate_dependencies)
 
 
 from bench.commands.update import (

bench/commands/make.py

@@ -253,3 +253,20 @@ def pip(ctx, args):
 
 	env_py = get_env_cmd("python")
 	os.execv(env_py, (env_py, "-m", "pip") + args)
+
+
+@click.command(
+	"validate-dependencies",
+	help="Validates that all requirements specified in frappe-dependencies are met curently.",
+)
+@click.pass_context
+def validate_dependencies(ctx):
+	"Validate all specified frappe-dependencies."
+	from bench.bench import Bench
+	from bench.app import App
+
+	bench = Bench(".")
+
+	for app_name in bench.apps:
+		app = App(app_name, bench=bench)
+		app.validate_app_dependencies(throw=True)