From 7431db7744ca858e8b6787b571c66c5140582918 Mon Sep 17 00:00:00 2001
From: Timothy Crosley <timothy.crosley@gmail.com>
Date: Wed, 9 Sep 2020 20:52:20 -0700
Subject: [PATCH] Fixed #1469: --diff option is ignored when input is from
 stdin. Release hot fix release 5.5.2

---
 CHANGELOG.md            |  3 +++
 isort/_version.py       |  2 +-
 isort/main.py           |  1 +
 pyproject.toml          |  2 +-
 tests/unit/test_main.py | 17 +++++++++++++++++
 5 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3c504a2fb..f6a0ce5a1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,9 @@ Changelog
 NOTE: isort follows the [semver](https://semver.org/) versioning standard.
 Find out more about isort's release policy [here](https://pycqa.github.io/isort/docs/major_releases/release_policy/).
 
+### 5.5.2 [Hotfix] September 9, 2020
+  - Fixed #1469: --diff option is ignored when input is from stdin.
+
 ### 5.5.1 September 4, 2020
   - Fixed #1454: Ensure indented import sections with import heading and a preceding comment don't cause import sorting loops.
   - Fixed #1453: isort error when float to top on almost empty file.
diff --git a/isort/_version.py b/isort/_version.py
index f680f9ffe..9fe27eebf 100644
--- a/isort/_version.py
+++ b/isort/_version.py
@@ -1 +1 @@
-__version__ = "5.5.1"
+__version__ = "5.5.2"
diff --git a/isort/main.py b/isort/main.py
index e7dc61ad5..5dc2ef188 100644
--- a/isort/main.py
+++ b/isort/main.py
@@ -836,6 +836,7 @@ def main(argv: Optional[Sequence[str]] = None, stdin: Optional[TextIOWrapper] =
             input_stream=sys.stdin if stdin is None else stdin,
             output_stream=sys.stdout,
             config=config,
+            show_diff=show_diff,
         )
     else:
         skipped: List[str] = []
diff --git a/pyproject.toml b/pyproject.toml
index 3aff16105..31e126565 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ line-length = 100
 
 [tool.poetry]
 name = "isort"
-version = "5.5.1"
+version = "5.5.2"
 description = "A Python utility / library to sort Python imports."
 authors = ["Timothy Crosley <timothy.crosley@gmail.com>"]
 license = "MIT"
diff --git a/tests/unit/test_main.py b/tests/unit/test_main.py
index ae63fd607..2457f2cb1 100644
--- a/tests/unit/test_main.py
+++ b/tests/unit/test_main.py
@@ -165,6 +165,23 @@ def test_main(capsys, tmpdir):
 """
     )
 
+    # Should be able to stream diff
+    input_content = TextIOWrapper(
+        BytesIO(
+            b"""
+import b
+import a
+"""
+        )
+    )
+    main.main(config_args + ["-", "--diff"], stdin=input_content)
+    out, error = capsys.readouterr()
+    assert not error
+    assert "+" in out
+    assert "-" in out
+    assert "import a" in out
+    assert "import b" in out
+
     # Should be able to run with just a file
     python_file = tmpdir.join("has_imports.py")
     python_file.write(