From d931833cc4cf22189b0c82219cc410842836339d Mon Sep 17 00:00:00 2001
From: q0w <43147888+q0w@users.noreply.github.com>
Date: Tue, 4 Apr 2023 18:45:56 +0300
Subject: [PATCH] Pass cache_dir to pip_args for backtracking resolver (#1827)

---
 piptools/scripts/compile.py |  2 ++
 tests/test_cli_compile.py   | 15 +++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/piptools/scripts/compile.py b/piptools/scripts/compile.py
index f578140d1..4afcc20e0 100755
--- a/piptools/scripts/compile.py
+++ b/piptools/scripts/compile.py
@@ -424,6 +424,8 @@ def cli(
         pip_args.append("--no-build-isolation")
     if resolver_name == "legacy":
         pip_args.extend(["--use-deprecated", "legacy-resolver"])
+    if resolver_name == "backtracking" and cache_dir:
+        pip_args.extend(["--cache-dir", cache_dir])
     pip_args.extend(right_args)
 
     repository: BaseRepository
diff --git a/tests/test_cli_compile.py b/tests/test_cli_compile.py
index 693cff130..4c162adbf 100644
--- a/tests/test_cli_compile.py
+++ b/tests/test_cli_compile.py
@@ -2853,3 +2853,18 @@ def test_raise_error_when_input_and_output_filenames_are_matched(
         f"Error: input and output filenames must not be matched: {req_out_path}"
     )
     assert expected_error in out.stderr.splitlines()
+
+
+@pytest.mark.network
+@backtracking_resolver_only
+def test_pass_pip_cache_to_pip_args(tmpdir, runner, current_resolver):
+    cache_dir = tmpdir.mkdir("cache_dir")
+
+    with open("requirements.in", "w") as fp:
+        fp.write("six==1.15.0")
+
+    out = runner.invoke(
+        cli, ["--cache-dir", str(cache_dir), "--resolver", current_resolver]
+    )
+    assert out.exit_code == 0
+    assert os.listdir(os.path.join(str(cache_dir), "http"))