.gitconfig is now autogenerated

.gitignore

@@ -130,3 +130,7 @@ examples/.last_checked
 
 # symlinks to fastai
 nbs/dl1/fastai
+
+# .gitconfig is now autogenerated
+.gitconfig
+

tools/trust-origin-git-config

@@ -42,10 +42,57 @@ def validate_script():
         print(f"Can't execute {filepath}")
         if result.stderr: print(f"Error: {result.stderr.decode('utf-8')}")
 
+def write_config():
+    is_windows = hasattr(sys, 'getwindowsversion')
+    cmd = "tools/fastai-nbstripout" if not is_windows else r"python tools\\\\fastai-nbstripout"
+    with open(".gitconfig", 'w') as f:
+        f.write(f"""# You need to enable this configuration once after checking out the repo
+# for the first time (assuming you checked it out into the course-v3/ dir):
+#
+# cd fastai
+# git config --local include.path ../.gitconfig
+#
+# If you need to disable this instrumentation do:
+#
+# git config --local --unset include.path
+#
+# You can always check .git/config to see whether a ../.gitconfig
+# [include] entry is there or not.
+#
+# If tools/fastai-nbstripout is modified to produce a different output,
+# manually rerun all the notebooks under git:
+#
+# {cmd} -d nbs/*/*ipynb
+#
+# # disable the strip out filter to get git to see changes
+# git config --local --unset include.path
+# git commit -a
+# git push
+# # restore the filter
+# git config --local include.path ../.gitconfig
+#
+
+# code notebooks strip out
+[filter "fastai-nbstripout-code"]
+        clean = {cmd}
+        smudge = cat
+        required = true
+[diff "ipynb-code"]
+        textconv = {cmd} -t
+
+# docs notebooks strip out
+[filter "fastai-nbstripout-docs"]
+        clean = {cmd} -d
+        smudge = cat
+        required = true
+[diff "ipynb-docs"]
+        textconv = {cmd} -dt
+""")
 
 def trust_enable():
     #validate_script()
 
+    write_config()
     cmd = "git config --local include.path ../.gitconfig"
     print(f"Executing: {cmd}")
     result = subprocess.run(cmd.split(), shell=False, check=False, stderr=subprocess.PIPE)