From f0dde62f9cf5db4d9b8ab296d477e8ef52f30ec2 Mon Sep 17 00:00:00 2001
From: Albert Tugushev <albert@tugushev.ru>
Date: Tue, 22 Nov 2022 19:18:28 +0100
Subject: [PATCH] Add `--no-index` flag to `pip-compile`

---
 piptools/scripts/compile.py | 19 +++++++++++++++----
 tests/test_cli_compile.py   | 10 ++++++++++
 2 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/piptools/scripts/compile.py b/piptools/scripts/compile.py
index 8438e7f55..82334bcb3 100755
--- a/piptools/scripts/compile.py
+++ b/piptools/scripts/compile.py
@@ -126,6 +126,11 @@ def _determine_linesep(
         index_url=redact_auth_from_url(_get_default_option("index_url"))
     ),
 )
+@click.option(
+    "--no-index",
+    is_flag=True,
+    help="Ignore package index (only looking at --find-links URLs instead).",
+)
 @click.option(
     "--extra-index-url",
     multiple=True,
@@ -302,6 +307,7 @@ def cli(
     all_extras: bool,
     find_links: tuple[str, ...],
     index_url: str,
+    no_index: bool,
     extra_index_url: tuple[str, ...],
     cert: str | None,
     client_cert: str | None,
@@ -392,6 +398,8 @@ def cli(
         pip_args.extend(["-f", link])
     if index_url:
         pip_args.extend(["-i", index_url])
+    if no_index:
+        pip_args.extend(["--no-index"])
     for extra_index in extra_index_url:
         pip_args.extend(["--extra-index-url", extra_index])
     if cert:
@@ -526,10 +534,13 @@ def cli(
     for req in constraints:
         drop_extras(req)
 
-    log.debug("Using indexes:")
-    with log.indentation():
-        for index_url in dedup(repository.finder.index_urls):
-            log.debug(redact_auth_from_url(index_url))
+    if repository.finder.index_urls:
+        log.debug("Using indexes:")
+        with log.indentation():
+            for index_url in dedup(repository.finder.index_urls):
+                log.debug(redact_auth_from_url(index_url))
+    else:
+        log.debug("Ignoring indexes.")
 
     if repository.finder.find_links:
         log.debug("")
diff --git a/tests/test_cli_compile.py b/tests/test_cli_compile.py
index 69185354b..e5dfcd171 100644
--- a/tests/test_cli_compile.py
+++ b/tests/test_cli_compile.py
@@ -220,6 +220,16 @@ def test_setuptools_preserves_environment_markers(
     assert out.stdout == 'foo==1.0 ; python_version >= "1"\n'
 
 
+def test_no_index_option(runner, tmp_path):
+    req_in = tmp_path / "requirements.in"
+    req_in.touch()
+
+    out = runner.invoke(cli, [req_in.as_posix(), "--no-index", "--verbose"])
+
+    assert out.exit_code == 0
+    assert "Ignoring indexes." in out.stderr
+
+
 def test_find_links_option(runner):
     with open("requirements.in", "w") as req_in:
         req_in.write("-f ./libs3")