Add --emit-options/--no-emit-options flag (#1123)

* Add --emit-options/--no-emit-options flag

* Use parametrization

piptools/scripts/compile.py

@@ -221,6 +221,12 @@ def _get_default_option(option_name: str) -> Any:
     default=True,
     help="Add index URL to generated file",
 )
+@click.option(
+    "--emit-options/--no-emit-options",
+    is_flag=True,
+    default=True,
+    help="Add options to generated file",
+)
 def cli(
     ctx: click.Context,
     verbose: int,
@@ -252,6 +258,7 @@ def cli(
     cache_dir: str,
     pip_args_str: Optional[str],
     emit_index_url: bool,
+    emit_options: bool,
 ) -> None:
     """Compiles requirements.txt from requirements.in specs."""
     log.verbosity = verbose - quiet
@@ -473,6 +480,7 @@ def cli(
         allow_unsafe=allow_unsafe,
         find_links=repository.finder.find_links,
         emit_find_links=emit_find_links,
+        emit_options=emit_options,
     )
     writer.write(
         results=results,

piptools/writer.py

@@ -70,6 +70,7 @@ def __init__(
         allow_unsafe: bool,
         find_links: List[str],
         emit_find_links: bool,
+        emit_options: bool,
     ) -> None:
         self.dst_file = dst_file
         self.click_ctx = click_ctx
@@ -87,6 +88,7 @@ def __init__(
         self.allow_unsafe = allow_unsafe
         self.find_links = find_links
         self.emit_find_links = emit_find_links
+        self.emit_options = emit_options
 
     def _sort_key(self, ireq: InstallRequirement) -> Tuple[bool, str]:
         return (not ireq.editable, key_from_ireq(ireq))
@@ -131,6 +133,8 @@ def write_find_links(self) -> Iterator[str]:
                 yield f"--find-links {find_link}"
 
     def write_flags(self) -> Iterator[str]:
+        if not self.emit_options:
+            return
         emitted = False
         for line in chain(
             self.write_index_options(),

tests/test_utils.py

@@ -238,8 +238,10 @@ def test_is_url_requirement_filename(caplog, from_line, line):
         (["--no-emit-trusted-host"], "pip-compile --no-emit-trusted-host"),
         (["--no-annotate"], "pip-compile --no-annotate"),
         (["--no-allow-unsafe"], "pip-compile"),
+        (["--no-emit-options"], "pip-compile --no-emit-options"),
         # Check that default values will be removed from the command
         (["--emit-trusted-host"], "pip-compile"),
+        (["--emit-options"], "pip-compile"),
         (["--annotate"], "pip-compile"),
         (["--emit-index-url"], "pip-compile"),
         (["--max-rounds=10"], "pip-compile"),

tests/test_writer.py

@@ -45,6 +45,7 @@ def writer(tmpdir_cwd):
             find_links=[],
             emit_find_links=True,
             strip_extras=False,
+            emit_options=True,
         )
         yield writer
 
@@ -227,6 +228,37 @@ def test_write_header_no_emit_header(writer):
         next(writer.write_header())
 
 
+@pytest.mark.parametrize(
+    ("emit_options", "expected_flags"),
+    (
+        pytest.param(
+            True,
+            (
+                "--index-url https://index-server",
+                "--find-links links",
+                "--trusted-host index-server",
+                "--no-binary flask",
+                "--only-binary django",
+                "",
+            ),
+            id="on",
+        ),
+        pytest.param(False, (), id="off"),
+    ),
+)
+def test_write_flags_emit_options(writer, emit_options, expected_flags):
+    """
+    There should be options if emit_options is True
+    """
+    writer.emit_options = emit_options
+    writer.index_urls = ["https://index-server"]
+    writer.find_links = ["links"]
+    writer.trusted_hosts = ["index-server"]
+    writer.format_control = FormatControl(no_binary=["flask"], only_binary=["django"])
+
+    assert tuple(writer.write_flags()) == expected_flags
+
+
 def test_write_format_controls(writer):
     """
     Tests --no-binary/--only-binary options.