From 2bd0d2797604629472278801e49c9daeebc372a1 Mon Sep 17 00:00:00 2001
From: Simon Michael <simon@joyful.com>
Date: Tue, 5 Feb 2019 11:54:10 -0800
Subject: [PATCH] shake: be GNU sed compatible, fixing defs.m4 updating

[ci skip]
---
 Shake.hs | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/Shake.hs b/Shake.hs
index b2020d803..0156691ab 100755
--- a/Shake.hs
+++ b/Shake.hs
@@ -86,7 +86,13 @@ usage = unlines
 groff    = "groff"
 makeinfo = "makeinfo"
 pandoc   = "pandoc"
-sed      = "sed -E"  -- assume only the features of BSD sed
+
+-- Must support both BSD sed and GNU sed. Tips:
+-- BSD:
+-- use [a-z] [0-9] instead of \w \d etc.
+-- GNU:
+-- backslash-escape {
+sed      = "sed -E"
 
 -- The kind of markdown used in our doc source files.
 fromsrcmd = "-f markdown-smart-tex_math_dollars"
@@ -515,7 +521,7 @@ main = do
       let versionfile = takeDirectory out </> ".version"
       need [versionfile]
       version <- ((head . words) <$>) $ liftIO $ readFile versionfile
-      cmd_ Shell sed "-i -e" ("'s/(_version_}}, *){{[^}]+/\\1{{"++version++"/'") out
+      cmd_ Shell sed "-i -e" ("'s/(_version_}}, *)\{\{[^}]+/\\1{{"++version++"/'") out
 
     -- PKG/package.yaml <- PKG/.version
     "hledger*/package.yaml" %> \out -> do