From f27eeaa2e84de306266dac1332638bc0ae452073 Mon Sep 17 00:00:00 2001
From: Todd Gamblin <tgamblin@llnl.gov>
Date: Sun, 24 Jul 2022 17:27:21 -0700
Subject: [PATCH] black: add .git-blame-ignore-revs toignore black reformatting
 in blame

- [x] add `.git-blame-ignore-revs` to ignore black reformatting
- [x] make `spack blame` respect `.git-blame-ignore-revs`
      (even if the user hasn't configured git to do so)
---
 .git-blame-ignore-revs       |  3 +++
 lib/spack/spack/cmd/blame.py | 14 ++++++++++++--
 2 files changed, 15 insertions(+), 2 deletions(-)
 create mode 100644 .git-blame-ignore-revs

diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
new file mode 100644
index 0000000000..a40816eb34
--- /dev/null
+++ b/.git-blame-ignore-revs
@@ -0,0 +1,3 @@
+# .git-blame-ignore-revs
+# Formatted entire codebase with black
+0e7b83453cc0115e19c87b6150b4f91eb3d824f3
diff --git a/lib/spack/spack/cmd/blame.py b/lib/spack/spack/cmd/blame.py
index 23ac147580..aeedbe72d4 100644
--- a/lib/spack/spack/cmd/blame.py
+++ b/lib/spack/spack/cmd/blame.py
@@ -131,11 +131,21 @@ def blame(parser, args):
 
     # get git blame for the package
     with working_dir(spack.paths.prefix):
+        # ignore the great black reformatting of 2022
+        ignore_file = os.path.join(spack.paths.prefix, ".git-blame-ignore-revs")
+
         if args.view == "git":
-            git("blame", blame_file)
+            git("blame", "--ignore-revs-file", ignore_file, blame_file)
             return
         else:
-            output = git("blame", "--line-porcelain", blame_file, output=str)
+            output = git(
+                "blame",
+                "--line-porcelain",
+                "--ignore-revs-file",
+                ignore_file,
+                blame_file,
+                output=str,
+            )
             lines = output.split("\n")
 
     # Histogram authors