feat(diff/changelog): cli: add generation of diff/changelog from a pair of Git revisions

docs/strictdoc_01_user_guide.sdoc

@@ -3947,11 +3947,23 @@ To activate the Diff/Changelog screen, add/edit the strictdoc.toml config file i
       "DIFF"
     ]
 
+With the feature enabled, the editable web server interface displays the corresponding Diff/Changelog screen, where users can select Git revisions to compare for change tracking.
+
+To use the feature with a command-line interface:
+
+.. code::
+
+    strictdoc export . --generate-diff-git="HEAD^..HEAD"
+
 .. admonition:: Robust MID-based change tracking
     :class: note
 
-    For optimal results when using the Diff/Changelog feature in a StrictDoc-based project, it is strongly recommended to enable Machine Identifiers (MIDs) for all project artifacts, such as TEXT, REQUIREMENT, etc.
-    Without MIDs, StrictDoc cannot ensure accurate change tracking. If a node lacks an MID, StrictDoc is unable to reliably detect whether it has been modified or relocated in subsequent versions of the documentation tree. For further details, refer to [LINK: SECTION-UG-Machine-identifiers-MID].
+    For optimal results when using the Diff/Changelog feature in a StrictDoc-based project, it is strongly recommended to enable Machine Identifiers (MIDs) for all project artifacts, such as TEXT, REQUIREMENT, and others. Without MIDs, StrictDoc relies on change tracking based on node UIDs, which is less reliable due to at least the following two issues:
+
+    1. The need to maintain UIDs for sections and text nodes, not only for requirements.
+    2. Possible changes to node UIDs. If a node UID changes, for example due to a change in project conventions, StrictDoc cannot reliably determine whether the node has been modified or relocated in later versions of the documentation tree.
+
+    For more details, see [LINK: SECTION-UG-Machine-identifiers-MID].
 <<<
 
 [[/SECTION]]

docs/strictdoc_04_release_notes.sdoc

@@ -52,7 +52,9 @@ TITLE: Unreleased
 [TEXT]
 MID: 12345f3b28ea4bfe9ca8afe6b21826a8
 STATEMENT: >>>
-This release includes the removal of legacy @sdoc markers, several bug fixes, and enhancements for edge cases.
+This release includes an enhancement to the Diff/Changelog feature, the removal of legacy @sdoc markers, several bug fixes, and improvements for edge cases.
+
+The Diff/Changelog feature has been extended to support the new --generate-diff-git option which allows generating the Diff/Changelog screens for a given pair of Git revisions.
 
 The legacy ``@sdoc`` marker has been removed from the codebase. From now on, only the ``@relation`` markers are recognized when linking requirements with source code files.
 

strictdoc/cli/cli_arg_parser.py

@@ -1,6 +1,6 @@
 import argparse
 import os
-from typing import Any, List, Optional
+from typing import Any, List, Optional, Tuple
 
 from strictdoc.cli.command_parser_builder import (
     CommandParserBuilder,
@@ -127,6 +127,7 @@ def validate(self) -> None:
 class ExportCommandConfig:
     def __init__(
         self,
+        *,
         input_paths: List[str],
         output_dir: Optional[str],
         config_path: Optional[str],
@@ -142,6 +143,8 @@ def __init__(
         reqif_multiline_is_xhtml: bool,
         reqif_enable_mid: bool,
         view: Optional[str],
+        generate_diff_git: Optional[str],
+        generate_diff_dirs: Optional[Tuple[str, str]],
         chromedriver: Optional[str],
     ):
         assert isinstance(input_paths, list), f"{input_paths}"
@@ -160,6 +163,8 @@ def __init__(
         self.reqif_multiline_is_xhtml: bool = reqif_multiline_is_xhtml
         self.reqif_enable_mid: bool = reqif_enable_mid
         self.view: Optional[str] = view
+        self.generate_diff_git: Optional[str] = generate_diff_git
+        self.generate_diff_dirs: Optional[Tuple[str, str]] = generate_diff_dirs
         self.chromedriver: Optional[str] = chromedriver
 
     def get_path_to_config(self) -> str:
@@ -197,18 +202,6 @@ def __init__(self, output_file: str):
         self.output_file: str = output_file
 
 
-class DiffCommandConfig:
-    def __init__(
-        self,
-        path_to_lhs_tree: str,
-        path_to_rhs_tree: str,
-        output_dir: Optional[str],
-    ):
-        self.path_to_lhs_tree: str = path_to_lhs_tree
-        self.path_to_rhs_tree: str = path_to_rhs_tree
-        self.output_dir: Optional[str] = output_dir
-
-
 class SDocArgsParser:
     def __init__(self, args: argparse.Namespace):
         self.args: argparse.Namespace = args
@@ -250,10 +243,6 @@ def is_dump_grammar_command(self) -> bool:
     def is_version_command(self) -> bool:
         return str(self.args.command) == "version"
 
-    @property
-    def is_diff_command(self) -> bool:
-        return str(self.args.command) == "diff"
-
     @property
     def is_manage_autouid_command(self) -> bool:
         return (
@@ -265,22 +254,24 @@ def get_export_config(self) -> ExportCommandConfig:
         project_title: Optional[str] = self.args.project_title
 
         return ExportCommandConfig(
-            self.args.input_paths,
-            self.args.output_dir,
-            self.args.config,
-            project_title,
-            self.args.formats,
-            self.args.fields,
-            self.args.generate_bundle_document,
-            self.args.no_parallelization,
-            self.args.enable_mathjax,
-            self.args.included_documents,
-            self.args.filter_nodes,
-            self.args.reqif_profile,
-            self.args.reqif_multiline_is_xhtml,
-            self.args.reqif_enable_mid,
-            self.args.view,
-            self.args.chromedriver,
+            input_paths=self.args.input_paths,
+            output_dir=self.args.output_dir,
+            config_path=self.args.config,
+            project_title=project_title,
+            formats=self.args.formats,
+            fields=self.args.fields,
+            generate_bundle_document=self.args.generate_bundle_document,
+            no_parallelization=self.args.no_parallelization,
+            enable_mathjax=self.args.enable_mathjax,
+            included_documents=self.args.included_documents,
+            filter_nodes=self.args.filter_nodes,
+            reqif_profile=self.args.reqif_profile,
+            reqif_multiline_is_xhtml=self.args.reqif_multiline_is_xhtml,
+            reqif_enable_mid=self.args.reqif_enable_mid,
+            view=self.args.view,
+            generate_diff_git=self.args.generate_diff_git,
+            generate_diff_dirs=self.args.generate_diff_dirs,
+            chromedriver=self.args.chromedriver,
         )
 
     def get_import_config_reqif(self, _: Any) -> ImportReqIFCommandConfig:
@@ -317,13 +308,6 @@ def get_server_config(self) -> ServerCommandConfig:
     def get_dump_grammar_config(self) -> DumpGrammarCommandConfig:
         return DumpGrammarCommandConfig(output_file=self.args.output_file)
 
-    def get_diff_config(self) -> DiffCommandConfig:
-        return DiffCommandConfig(
-            path_to_lhs_tree=self.args.path_to_lhs_tree,
-            path_to_rhs_tree=self.args.path_to_rhs_tree,
-            output_dir=self.args.output_dir,
-        )
-
 
 def create_sdoc_args_parser(
     testing_args: Optional[argparse.Namespace] = None,

strictdoc/cli/command_parser_builder.py

@@ -58,6 +58,17 @@ def _check_reqif_import_markup(markup: Optional[str]) -> str:
     return markup
 
 
+def _check_git_revisions(git_revisions: str) -> str:
+    if ".." not in git_revisions:
+        message = (
+            "Invalid Git revision pair. "
+            'The expected format is: "<Git revision>..<Git revision>". '
+            'Example: "HEAD^..HEAD".'
+        )
+        raise argparse.ArgumentTypeError(message)
+    return git_revisions
+
+
 def _parse_fields(fields: str) -> List[str]:
     fields_array = fields.split(",")
     return fields_array
@@ -125,7 +136,6 @@ def build(self) -> SDocArgumentParser:
         self.add_import_command(command_subparsers)
         self.add_version_command(command_subparsers)
         self.add_dump_command(command_subparsers)
-        self.add_diff_command(command_subparsers)
 
         return main_parser
 
@@ -250,6 +260,24 @@ def add_export_command(
             type=str,
             help="Choose which view will be exported.",
         )
+        command_parser_export.add_argument(
+            "--generate-diff-git",
+            type=_check_git_revisions,
+            help=(
+                "Generate Diff/Changelog for a given pair of Git revisions. "
+                'Example: --generate-diff-git "HEAD^..HEAD"'
+            ),
+        )
+        command_parser_export.add_argument(
+            "--generate-diff-dirs",
+            "--generate-diff-dirs",
+            metavar=("OLD_PATH", "NEW_PATH"),
+            nargs=2,
+            help=(
+                "Generate Diff/Changelog for a given pair of local directories. "
+                'Example: --generate-diff-dirs "./old_path" "./new_path"'
+            ),
+        )
         command_parser_export.add_argument(
             "--chromedriver",
             type=str,
@@ -458,28 +486,3 @@ def add_manage_command(
             ),
         )
         add_config_argument(command_parser_auto_uid)
-
-    @staticmethod
-    def add_diff_command(
-        command_subparsers: "argparse._SubParsersAction[SDocArgumentParser]",
-    ) -> None:
-        diff_command_parser = command_subparsers.add_parser(
-            "diff",
-            help="Generate Diff between two SDoc project trees.",
-            formatter_class=formatter,
-        )
-        diff_command_parser.add_argument(
-            "path_to_lhs_tree",
-            type=str,
-            help="Path to the left-hand side project tree.",
-        )
-        diff_command_parser.add_argument(
-            "path_to_rhs_tree",
-            type=str,
-            help="Path to the right-hand side project tree.",
-        )
-        diff_command_parser.add_argument(
-            "--output-dir",
-            type=str,
-            help="A directory where to output the files to.",
-        )

strictdoc/cli/main.py

@@ -17,7 +17,6 @@
 from strictdoc import environment
 from strictdoc.cli.cli_arg_parser import (
     CLIValidationError,
-    DiffCommandConfig,
     DumpGrammarCommandConfig,
     ExportCommandConfig,
     ImportExcelCommandConfig,
@@ -27,7 +26,6 @@
     create_sdoc_args_parser,
 )
 from strictdoc.commands.about_command import AboutCommand
-from strictdoc.commands.diff_command import DiffCommand
 from strictdoc.commands.dump_grammar_command import DumpGrammarCommand
 from strictdoc.commands.manage_autouid_command import ManageAutoUIDCommand
 from strictdoc.commands.version_command import VersionCommand
@@ -139,15 +137,6 @@ def _main(parallelizer: Parallelizer, parser: SDocArgsParser) -> None:
     elif parser.is_about_command:
         AboutCommand.execute()
 
-    elif parser.is_diff_command:
-        diff_config: DiffCommandConfig = parser.get_diff_config()
-        project_config = ProjectConfigLoader.load_from_path_or_get_default(
-            path_to_config=os.getcwd(),
-        )
-        DiffCommand.execute(
-            project_config=project_config, diff_config=diff_config
-        )
-
     else:
         raise NotImplementedError