From e1fc5c4dae82acd2eb6618724599aca368c200b7 Mon Sep 17 00:00:00 2001
From: Jason Gross
Date: Sun, 4 Dec 2016 14:09:24 -0500
Subject: Add .dir-locals.el and _CoqProject files for emacs stdlib editing

These set up PG to use the local coqtop, and the local coqlib, when
editing files in the stdlib.  As per
https://github.com/coq/coq/pull/386#issuecomment-279012238, we can use
`_CoqProject` for `theories/Init`, and this allows CoqIDE to edit those
files.  However, we cannot use it for `theories/`, because a
`_CoqProject` file will override a `.dir-locals.el` in the same
directory, and there is no way to get PG to pick up a valid `-coqlib`
from `_CoqProject` (because it'll take the path relative to the current
directory, not relative to the directory of `_CoqProject`).
---
 theories/.dir-locals.el   | 4 ++++
 theories/Init/_CoqProject | 2 ++
 2 files changed, 6 insertions(+)
 create mode 100644 theories/.dir-locals.el
 create mode 100644 theories/Init/_CoqProject

diff --git a/theories/.dir-locals.el b/theories/.dir-locals.el
new file mode 100644
index 0000000000..4e8830f6c1
--- /dev/null
+++ b/theories/.dir-locals.el
@@ -0,0 +1,4 @@
+((coq-mode . ((eval . (let ((default-directory (locate-dominating-file
+						buffer-file-name ".dir-locals.el")))
+			(setq-local coq-prog-args `("-coqlib" ,(expand-file-name "..") "-R" ,(expand-file-name ".") "Coq"))
+			(setq-local coq-prog-name (expand-file-name "../bin/coqtop")))))))
diff --git a/theories/Init/_CoqProject b/theories/Init/_CoqProject
new file mode 100644
index 0000000000..bff79d34bf
--- /dev/null
+++ b/theories/Init/_CoqProject
@@ -0,0 +1,2 @@
+-R .. Coq
+-arg -noinit
-- 
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