[Feat]: Add lint-requirements command

.github/workflows/test.yaml

@@ -101,6 +101,7 @@ jobs:
           - extra_metadata
           - elfdeps
           - prebuilt_wheel_hook
+          - lint_requirements
         os:
           - ubuntu-latest
           - macos-latest

.mergify.yml

@@ -48,6 +48,7 @@ pull_request_rules:
           - check-success=e2e (3.11, 1.75, prebuilt_wheels_alt_server, ubuntu-latest)
           - check-success=e2e (3.11, 1.75, report_missing_dependency, ubuntu-latest)
           - check-success=e2e (3.11, 1.75, rust_vendor, ubuntu-latest)
+          - check-success=e2e (3.11, 1.75, lint_requirements, ubuntu-latest)
           - check-success=e2e (3.12, 1.75, bootstrap, macos-latest)
           - check-success=e2e (3.12, 1.75, bootstrap, ubuntu-latest)
           - check-success=e2e (3.12, 1.75, bootstrap_build_tags, macos-latest)
@@ -92,6 +93,8 @@ pull_request_rules:
           - check-success=e2e (3.12, 1.75, report_missing_dependency, ubuntu-latest)
           - check-success=e2e (3.12, 1.75, rust_vendor, macos-latest)
           - check-success=e2e (3.12, 1.75, rust_vendor, ubuntu-latest)
+          - check-success=e2e (3.12, 1.75, lint_requirements, macos-latest)
+          - check-success=e2e (3.12, 1.75, lint_requirements, ubuntu-latest)
           - "-draft"
 
           # At least 1 reviewer

e2e/test_lint_requirements.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+# -*- indent-tabs-mode: nil; tab-width: 2; sh-indentation: 2; -*-
+
+# This script acts as an e2e test for lint_requirements command of fromager
+
+SCRIPTDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+source "$SCRIPTDIR/common.sh"
+
+pass=true
+
+# Test to demonstrate that command works as expected when input files are valid
+
+if ! fromager lint-requirements "$SCRIPTDIR/validate_inputs/constraints.txt" "$SCRIPTDIR/validate_inputs/requirements.txt"; then
+    echo "the input files should have been recognized as correctly formatted" 1>&2
+    pass=false
+fi;
+
+# Test to demonstrate failing of command due to missing input args
+
+if fromager lint-requirements; then
+    echo "missing input files should have been recognized by the command" 1>&2
+    pass=false
+fi;
+
+# Test to demonstrate that command reports error for invalid / bad input files
+
+if fromager lint-requirements "$SCRIPTDIR/validate_inputs/constraints.txt" "$SCRIPTDIR/validate_inputs/invalid-requirements.txt"; then
+    echo "invalid input files should have been recognized by the command" 1>&2
+    pass=false
+fi;
+
+$pass

e2e/validate_inputs/constraints.txt

@@ -0,0 +1,5 @@
+# This requirements.txt is used for testing lint_requirements
+# command of fromager and contains examples of packages
+
+gast==0.5.5
+torch==2.3.1

e2e/validate_inputs/invalid-requirements.txt

@@ -0,0 +1,5 @@
+# This requirements file is invalid on purpose to test the lint-requirements 
+# command of fromager. Do not attempt to fix this file
+
+foo==
+bar<=

e2e/validate_inputs/requirements.txt

@@ -0,0 +1,5 @@
+# This requirements.txt is used for testing lint_requirements
+# command of fromager and contains examples of packages
+stevedore==5.2.0
+kfp==2.11.0
+

src/fromager/commands/__init__.py

@@ -6,6 +6,7 @@
     download_sequence,
     graph,
     lint,
+    lint_requirements,
     list_overrides,
     migrate_config,
     server,
@@ -26,4 +27,5 @@
     download_sequence.download_sequence,
     server.wheel_server,
     migrate_config.migrate_config,
+    lint_requirements.lint_requirements,
 ]

src/fromager/commands/lint_requirements.py

@@ -0,0 +1,39 @@
+import logging
+import sys
+
+import click
+from packaging.requirements import InvalidRequirement, Requirement
+
+from fromager import requirements_file
+
+logger = logging.getLogger(__name__)
+
+
+@click.command()
+@click.argument(
+    "input_files_path", nargs=-1, required=True, type=click.Path(exists=False)
+)
+def lint_requirements(input_files_path: list[click.Path]) -> None:
+    """
+    Command to lint the constraints.txt and requirements.txt files
+    This command takes a single wildcard path string for constraints.txt and requirements.txt.
+    It checks the formatting of these files and reports issues if found.
+    """
+
+    if len(input_files_path) == 0:
+        logger.error("no constraints.txt or requirements.txt found in given paths")
+        sys.exit(1)
+
+    flag = True
+
+    for path in input_files_path:
+        parsed_lines = requirements_file.parse_requirements_file(str(path))
+        for line in parsed_lines:
+            try:
+                Requirement(line)
+            except InvalidRequirement as err:
+                logger.error(f"{path}: {line}: {err}")
+                flag = False
+
+    if not flag:
+        sys.exit(1)