[filter-repo PATCH] filter-repo: help with local install

[Michael J Gruber <git@grubix.eu>]

The Makefile suggests a local install and works almost as is, except for
the python path. Make it work automatically for this typical use case,
and give a corresponding hint in INSTALL.md.

Signed-off-by: Michael J Gruber <git@grubix.eu>
---
 INSTALL.md | 5 +++--
 Makefile   | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/INSTALL.md b/INSTALL.md
index 00aabb7..d479681 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -75,8 +75,9 @@ filter-repo only consists of a few files that need to be installed:
     You can create this symlink to (or copy of) git-filter-repo named
     git_filter-repo.py and place it in your python site packages; `python
     -c "import site; print(site.getsitepackages())"` may help you find the
-    appropriate location for your system.  Alternatively, you can place
-    this file anywhere within $PYTHONPATH.
+    appropriate location for your system, `python -c "import site;
+    print(site.getusersitepackages())"` for a local install. Alternatively,
+    you can place this file anywhere within $PYTHONPATH.
 
   * git-filter-repo.1
 
diff --git a/Makefile b/Makefile
index 31f5e3a..c97d1f6 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@ bindir = $(prefix)/libexec/git-core
 localedir = $(prefix)/share/locale
 mandir = $(prefix)/share/man
 htmldir = $(prefix)/share/doc/git-doc
-pythondir = $(prefix)/lib64/python3.6/site-packages
+pythondir = $(shell python -c "import site; print(site.getusersitepackages())")
 
 default: build
 
-- 
2.32.0.375.gf4d99f6c19