From 858872bab80ea4adb22e80f5212acf34628b1168 Mon Sep 17 00:00:00 2001
From: Christos Kontas <xakon@yahoo.com>
Date: Thu, 1 Feb 2018 10:10:24 +0100
Subject: [PATCH] Makefile: split the target from the PHONY rule

A PHONY rule is executed always.  The target of the `readme' rule is to
create the `www/data/readme.json', which depends only on `README.md'.
If we specify these dependencies separately, make(1) won't build the
`readme.json', if it's not necessary.  And yet, we can refer to this
creation by typing `make readme'.
---
 Makefile | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 05bca0e..ccbb8d6 100644
--- a/Makefile
+++ b/Makefile
@@ -28,8 +28,9 @@ release: bin bindata.go
 docs: readme
 	cd www && hugo -d ../docs
 
-readme: www/data
-	cat README.md | python -c 'import json,sys; print(json.dumps({"content": sys.stdin.read()}))' > www/data/readme.json
+readme: www/data/readme.json
 
+www/data/readme.json: www/data README.md
+	cat README.md | python -c 'import json,sys; print(json.dumps({"content": sys.stdin.read()}))' > www/data/readme.json
 www/data bin:
 	mkdir -p $@