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

piptools/scripts/compile.py

@@ -179,6 +179,12 @@
     type=click.Path(file_okay=False, writable=True),
 )
 @click.option("--pip-args", help="Arguments to pass directly to the pip command.")
+@click.option(
+    "--emit-options/--no-emit-options",
+    is_flag=True,
+    default=True,
+    help="Add options to generated file",
+)
 def cli(
     ctx,
     verbose,
@@ -207,6 +213,7 @@ def cli(
     emit_find_links,
     cache_dir,
     pip_args,
+    emit_options,
 ):
     """Compiles requirements.txt from requirements.in specs."""
     log.verbosity = verbose - quiet
@@ -421,6 +428,7 @@ 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

@@ -67,6 +67,7 @@ def __init__(
         allow_unsafe,
         find_links,
         emit_find_links,
+        emit_options,
     ):
         self.src_files = src_files
         self.dst_file = dst_file
@@ -84,6 +85,7 @@ 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):
         return (not ireq.editable, str(ireq.req).lower())
@@ -125,6 +127,9 @@ def write_find_links(self):
                 yield "--find-links {}".format(find_link)
 
     def write_flags(self):
+        if not self.emit_options:
+            return
+
         emitted = False
         for line in chain(
             self.write_index_options(),

tests/test_utils.py

@@ -249,8 +249,10 @@ def test_force_text(value, expected_text):
         (["--no-index"], "pip-compile --no-index"),
         (["--no-emit-trusted-host"], "pip-compile --no-emit-trusted-host"),
         (["--no-annotate"], "pip-compile --no-annotate"),
+        (["--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"),
         (["--index"], "pip-compile"),
         (["--max-rounds=10"], "pip-compile"),

tests/test_writer.py

@@ -42,6 +42,7 @@ def writer(tmpdir_cwd):
             allow_unsafe=False,
             find_links=[],
             emit_find_links=True,
+            emit_options=True,
         )
         yield writer
 
@@ -224,6 +225,40 @@ def test_write_header_no_emit_header(writer):
         next(writer.write_header())
 
 
+def test_write_flags_emit_options(writer):
+    """
+    There should be options if emit_options is True
+    """
+    writer.emit_options = True
+    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()) == (
+        "--index-url https://index-server",
+        "--find-links links",
+        "--trusted-host index-server",
+        "--no-binary flask",
+        "--only-binary django",
+        "",
+    )
+
+
+def test_write_flags_no_emit_options(writer):
+    """
+    There should not be options if emit_options is False
+    """
+    writer.emit_options = False
+    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"])
+
+    with raises(StopIteration):
+        next(writer.write_flags())
+
+
 def test_write_format_controls(writer):
     """
     Tests --no-binary/--only-binary options.