From ddb3fae72826c0da3ba449be4ebc72e44c1ace16 Mon Sep 17 00:00:00 2001
From: Emilio Jesus Gallego Arias
Date: Wed, 19 Sep 2018 02:50:29 +0200
Subject: [dune] [doc] Support for building the reference manual with Dune.

This is a reduced version of #8503 as to provide a way to build the
reference manual with Dune.

Dune 1.6 supports (experimentally) directories as targets, thus we
introduce a rule that will call `sphinx` to build the manual.

This only provides build, however generation of `.install` rules is
not done, it will be hopefully addressed in #8503.

Note that we set `expire: 1 month` for all the artifacts we build with
Dune. IMHO this makes most sense as not to abuse Gitlab's hosting,
however of course we could consider a different deployment strategy if
wanted.
---
 doc/tools/coqrst/coqdoc/main.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'doc/tools')

diff --git a/doc/tools/coqrst/coqdoc/main.py b/doc/tools/coqrst/coqdoc/main.py
index 57adcb287c..1de9890992 100644
--- a/doc/tools/coqrst/coqdoc/main.py
+++ b/doc/tools/coqrst/coqdoc/main.py
@@ -35,7 +35,7 @@ COQDOC_HEADER = "".join("(** remove printing {} *)".format(s) for s in COQDOC_SY
 
 def coqdoc(coq_code, coqdoc_bin=None):
     """Get the output of coqdoc on coq_code."""
-    coqdoc_bin = coqdoc_bin or os.path.join(os.getenv("COQBIN"), "coqdoc")
+    coqdoc_bin = coqdoc_bin or os.path.join(os.getenv("COQBIN", ""), "coqdoc")
     fd, filename = mkstemp(prefix="coqdoc-", suffix=".v")
     if platform.system().startswith("CYGWIN"):
         # coqdoc currently doesn't accept cygwin style paths in the form "/cygdrive/c/..."
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