Merge pull request #1656 from CyberShadow/pull-20170517-192405

Add OpenGraph meta tags to the front page

Author: MartinNowak

images/dlogo_2015.svg

@@ -434,6 +434,7 @@ Macros:
     FRONTPAGE_ORG=$(DIVC frontpage-orgs-cell dont-highlight-link donthyphenate, $(LINK2 $2, $(FRONTPAGE_ORG_IMG $3)) $(H3 $1) $(P $(I $4 )))
     _= Single word inline CSS needs to be escaped _=
     C_A=$1:$2;
+    META_DESCRIPTION=D is a systems programming language with C-like syntax and static typing.
     EXTRA_HEADERS=$(T style,
         .why-d-icon {
             padding-right: 0.2em;
@@ -467,3 +468,10 @@ Macros:
             margin-bottom: -0.5em;
         }
     )
+    $(COMMENT index.html only for now, until we can figure out
+              how to generate a URL to the current page for og:url)
+    <meta property="og:title" content="$(FULL_TITLE)" />
+    <meta property="og:type" content="website" />
+    <meta property="og:url" content="https://dlang.org/" />
+    <meta property="og:image" content="https://dlang.org/images/dlogo_opengraph.png" />
+    <meta property="og:description" content="$(META_DESCRIPTION)" />

images/dlogo_opengraph.png

@@ -118,6 +118,7 @@ IMAGES=favicon.ico $(ORGS_USING_D) $(addprefix images/, \
 	$(addsuffix .png, archlinux_logo apple_logo centos_logo chocolatey_logo \
 		d3 debian_logo dlogo fedora_logo freebsd_logo gentoo_logo homebrew_logo \
 		opensuse_logo ubuntu_logo windows_logo pattern github-ribbon \
+		dlogo_opengraph \
 		$(addprefix ddox/, alias class enum enummember function \
 			inherited interface module package private property protected \
 			struct template variable)) \