[linter] Simplify Conan V2 migration linter

.github/workflows/linter-conan-v2.yml

@@ -22,12 +22,12 @@ jobs:
             linter/**
             .github/workflows/linter-conan-v2.yml
 
-      - name: Get Conan v1 version
-        id: parse_conan_v1_version
+      - name: Get Conan v2 version
+        id: parse_conan_v2_version
         if: steps.changed_files.outputs.any_changed == 'true'
         uses: mikefarah/yq@master
         with:
-          cmd: yq '.conan.version' '.c3i/config_v1.yml'
+          cmd: yq '.conan.version' '.c3i/config_v2.yml'
 
       - uses: actions/setup-python@v4
         if: steps.changed_files.outputs.any_changed == 'true'
@@ -37,7 +37,7 @@ jobs:
       - name: Install requirements
         if: steps.changed_files.outputs.any_changed == 'true'
         run: |
-          pip install ${{ env.REQUIREMENTS }} conan==${{ steps.parse_conan_v1_version.outputs.result }}
+          pip install ${{ env.REQUIREMENTS }} conan==${{ steps.parse_conan_v2_version.outputs.result }}
 
       - name: Execute linter over all recipes in the repository
         id: linter_recipes
@@ -68,20 +68,20 @@ jobs:
         with:
           files: |
             recipes/*/*/conanfile.py
-      - name: Get Conan v1 version
-        id: parse_conan_v1_version
+      - name: Get Conan v2 version
+        id: parse_conan_v2_version
         if: steps.changed-files.outputs.any_changed == 'true'
         uses: mikefarah/yq@master
         with:
-          cmd: yq '.conan.version' '.c3i/config_v1.yml'
+          cmd: yq '.conan.version' '.c3i/config_v2.yml'
       - uses: actions/setup-python@v4
         if: steps.changed-files.outputs.any_changed == 'true'
         with:
           python-version: ${{ env.PYVER }}
       - name: Install dependencies
         if: steps.changed-files.outputs.any_changed == 'true'
         run: |
-          pip install ${{ env.REQUIREMENTS }} conan==${{ steps.parse_conan_v1_version.outputs.result }}
+          pip install ${{ env.REQUIREMENTS }} conan==${{ steps.parse_conan_v2_version.outputs.result }}
       - name: Run linter
         if: steps.changed-files.outputs.any_changed == 'true'
         run: |
@@ -101,24 +101,24 @@ jobs:
         with:
           files: |
             recipes/*/*/test_*/conanfile.py
-      - name: Get Conan v1 version
-        id: parse_conan_v1_version
+      - name: Get Conan v2 version
+        id: parse_conan_v2_version
         if: steps.changed-files.outputs.any_changed == 'true'
         uses: mikefarah/yq@master
         with:
-          cmd: yq '.conan.version' '.c3i/config_v1.yml'
+          cmd: yq '.conan.version' '.c3i/config_v2.yml'
       - uses: actions/setup-python@v4
         if: steps.changed-files.outputs.any_changed == 'true'
         with:
           python-version: ${{ env.PYVER }}
       - name: Install dependencies
         if: steps.changed-files.outputs.any_changed == 'true'
         run: |
-          pip install ${{ env.REQUIREMENTS }} conan==${{ steps.parse_conan_v1_version.outputs.result }}
+          pip install ${{ env.REQUIREMENTS }} conan==${{ steps.parse_conan_v2_version.outputs.result }}
       - name: Run linter
         if: steps.changed-files.outputs.any_changed == 'true'
         run: |
           echo "::add-matcher::linter/recipe_linter.json"
           for file in ${{ steps.changed-files.outputs.all_changed_files }}; do
-            pylint --rcfile=linter/pylintrc_testpackage --ignore-paths="recipes/[^/]*/[^/]*/test_v1[^/]*/conanfile.py" --output-format=parseable ${file}
+            pylint --rcfile=linter/pylintrc_testpackage --ignore-paths="recipes/[^/]*/[^/]*/test_v2[^/]*/conanfile.py" --output-format=parseable ${file}
           done

docs/linters.md

@@ -16,13 +16,8 @@ to configure plugins, warnings and errors which should be enabled or disabled.
   * [Running the linters locally](#running-the-linters-locally)
   * [Pylint configuration files](#pylint-configuration-files)
   * [Linter Warning and Errors](#linter-warning-and-errors)
-    * [E9006 - conan-import-conanfile: ConanFile should be imported from conan](#e9006---conan-import-conanfile-conanfile-should-be-imported-from-conan)
     * [E9005 - conan-missing-name: Every conan recipe must contain the attribute name](#e9005---conan-missing-name-every-conan-recipe-must-contain-the-attribute-name)
-    * [E9004 - conan-package-name: Conan package names must be lower-case](#e9004---conan-package-name-conan-package-names-must-be-lower-case)
     * [E9007 - conan-test-no-name: Do not add name attribute in test package recipes](#e9007---conan-test-no-name-do-not-add-name-attribute-in-test-package-recipes)
-    * [E9008 - conan-import-errors: Deprecated imports should be replaced by new imports](#e9008---conan-import-errors-deprecated-imports-should-be-replaced-by-new-imports)
-    * [E9009 - conan-import-error-conanexception: conans.errors is deprecated and conan.errors should be used instead](#e9009---conan-import-error-conanexception-conanserrors-is-deprecated-and-conanerrors-should-be-used-instead)
-    * [E9010 - conan-import-error-conaninvalidconfiguration: conans.errors is deprecated and conan.errors should be used instead](#e9010---conan-import-error-conaninvalidconfiguration-conanserrors-is-deprecated-and-conanerrors-should-be-used-instead)
     * [E9011 - conan-import-tools: Importing conan.tools or conan.tools.xxx.zzz.yyy should be considered as private](#e9011---conan-import-tools-importing-conantools-or-conantoolsxxxzzzyyy-should-be-considered-as-private)
     * [E9012 - conan-attr-version: Recipe should not contain version attribute](#e9012---conan-attr-version-recipe-should-not-contain-version-attribute)<!-- endToc -->
 
@@ -47,18 +42,6 @@ Check the [Developing Recipes](developing_recipes_locally.md) for more informati
 
 Here is the list of current warning and errors provided by pylint, when using CCI configuration.
 
-### E9006 - conan-import-conanfile: ConanFile should be imported from conan
-
-```python
-from conans import ConanFile
-```
-
-Should be replaced by:
-
-```python
-from conan import Conanfile
-```
-
 ### E9005 - conan-missing-name: Every conan recipe must contain the attribute name
 
 The attribute `name` is always expected. On the other hand, `version` should not be listed.
@@ -68,15 +51,6 @@ def BazConanfile(ConanFile):
     name = "baz"
 ```
 
-### E9004 - conan-package-name: Conan package names must be lower-case
-
-The package name is always lower-case, even when the upstream uses another format
-
-```python
-def FoobarConanfile(ConanFile):
-    name = "foobar"
-```
-
 ### E9007 - conan-test-no-name: Do not add name attribute in test package recipes
 
 The test package is not a recipe, thus, it should not have a name
@@ -86,55 +60,6 @@ def TestPackageConanFile(ConanFile):
     name = "test_package" # Wrong!
 ```
 
-### E9008 - conan-import-errors: Deprecated imports should be replaced by new imports
-
-Read [v2_linter](v2_linter.md) for a list of mappings of v1 to v2.
-Regular imports from `conans.tools` are now updated:
-
-```python
-from conans import tools
-...
-
-tools.rmdir(os.path.join(self.package_folder, "shared"))
-```
-
-Should be replaced by specialized tools, prepared for Conan 2.0
-
-```python
-from conan.tools.files import rmdir
-...
-
-rmdir(self, os.path.join(self.package_folder, "shared"))
-```
-
-### E9009 - conan-import-error-conanexception: conans.errors is deprecated and conan.errors should be used instead
-
-```python
-from conans.errors import ConanException
-```
-
-Should be replaced by:
-
-```python
-from conan.errors import ConanException
-```
-
-Only the namespace `conans` has been replaced by `conan`.
-
-### E9010 - conan-import-error-conaninvalidconfiguration: conans.errors is deprecated and conan.errors should be used instead
-
-```python
-from conans.errors import ConanInvalidConfiguration
-```
-
-Should be replaced by:
-
-```python
-from conan.errors import ConanInvalidConfiguration
-```
-
-Only the namespace `conans` has been replaced by `conan`.
-
 ### E9011 - conan-import-tools: Importing conan.tools or conan.tools.xxx.zzz.yyy should be considered as private
 
 Documented on [conanfile.tools](https://docs.conan.io/1/reference/conanfile/tools.html):

docs/v2_migration.md

@@ -3,8 +3,8 @@
 This is expected for recipes to be updates in each pull request.
 
 - Updated helpers are expected, this is enforced by the [v2_linter](v2_linter.md)
-- Once a recipe publishes v2 packages, it must pass the v2 pipeline
-- The v2 pipeline with **shortly be required** for changes to be merged.
+- Once a recipe publishes v2 packages, it must pass the v2 pipeline always.
+- The v2 pipeline with **is required** for changes to be merged.
 
 <!-- toc -->
 ## Contents
@@ -127,7 +127,7 @@ generators using the ``set_property(property_name, value)`` method.
 Both of these two models **will live together in recipes** to make
 recipes compatible for both 1.x and 2.0 users. Deprecated feilds are not to be removed at this time.
 
-To understand the impact of these and the relation between different generates, refer to the 
+To understand the impact of these and the relation between different generates, refer to the
 [migrating properties](https://docs.conan.io/1/migrating_to_2.0/properties.html) documentation.
 
 ### Translating .names information to cmake_target_name, cmake_module_target_name and cmake_file_name

linter/check_package_name.py

@@ -13,11 +13,6 @@ class PackageName(BaseChecker):
 
     name = "conan-package-name"
     msgs = {
-        "E9004": (
-            "Reference name should be all lowercase",
-            "conan-bad-name",
-            "Use only lower-case on the package name: `name = 'foobar'`."
-        ),
         "E9005": (
             "Missing name attribute",
             "conan-missing-name",
@@ -44,9 +39,6 @@ def visit_classdef(self, node: nodes) -> None:
                     if is_test:
                         self.add_message("conan-test-no-name", node=attr, line=attr.lineno)
                         return
-                    value = children[1].as_string()
-                    if value.lower() != value:
-                        self.add_message("conan-bad-name", node=attr, line=attr.lineno)
                     return
             if not is_test:
                 self.add_message("conan-missing-name", node=node)

linter/conanv2_transition.py

@@ -6,19 +6,13 @@
 
 from pylint.lint import PyLinter
 from linter.check_package_name import PackageName
-from linter.check_import_conanfile import ImportConanFile
-from linter.check_import_errors import ImportErrorsConanException, ImportErrorsConanInvalidConfiguration, ImportErrors
 from linter.check_import_tools import ImportTools
 from linter.check_layout_src_folder import LayoutSrcFolder
 from linter.check_version_attribute import VersionAttribute
 
 
 def register(linter: PyLinter) -> None:
     linter.register_checker(PackageName(linter))
-    linter.register_checker(ImportConanFile(linter))
-    linter.register_checker(ImportErrors(linter))
-    linter.register_checker(ImportErrorsConanException(linter))
-    linter.register_checker(ImportErrorsConanInvalidConfiguration(linter))
     linter.register_checker(ImportTools(linter))
     linter.register_checker(LayoutSrcFolder(linter))
     linter.register_checker(VersionAttribute(linter))