dev-libs/mathjax: Bump to 2.7.7, fix USE=doc

Thanks to Arfrever Frehtes Taifersar Arahesis for reporting.

Closes: https://bugs.gentoo.org/show_bug.cgi?id=526128
Package-Manager: Portage-2.3.84, Repoman-2.3.20
Signed-off-by: Mark Wright <gienah@gentoo.org>

dev-libs/mathjax/Manifest

@@ -1,2 +1,3 @@
 DIST mathjax-2.7.0.tar.gz 24594403 BLAKE2B 7cadfe7565a7ebba3569fb298a097f07081926b843a06c3c32447757eb0a5d463d654f20c42821010c81c59819bb14fdc5e84a39e87106bb6808bd6c9ca52bb7 SHA512 2a7c2b4a4991485c18f78dda4115da05a31c1a2d952c403726e99d22fd26f166298199238ad482e53b63b5414be687f325b586f5ebe4e2d552447c929415b350
 DIST mathjax-2.7.4.tar.gz 25355532 BLAKE2B 0bed5224356757c64989de8b9355f5c2505f1fa951456c52caf1cc0a9b5a864633ce5299cc9b67b1e5c743e39bcb6aee787a76d6871fc998b614d62e12499f6f SHA512 cddc4c64c188620307f0ede3b0bc7ba071f78702ba6315426d8c83129543a6b81a3a9a115f88017e23b5094b7aefd934c39aeec9688419830e33f9fd0fb1de7e
+DIST mathjax-2.7.7.tar.gz 25347766 BLAKE2B c1f11bc854c95888d7f04ee627094a2e297e7554b0380dab30c08e2c4405495df611b440da0efd1e6456150513e07fa4ef90808d2332f9fb83785c118228de18 SHA512 471bd22475827a13d79de7d335f3e51ace06dfc04f575e8829b4505f428949f1dbe58798635cb434ed02ae0cd3fd8d1d577196b4961365fbcb399cc075d3284f

dev-libs/mathjax/mathjax-2.7.7.ebuild

@@ -0,0 +1,64 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit vcs-clean
+
+DESCRIPTION="JavaScript display engine for LaTeX, MathML and AsciiMath"
+HOMEPAGE="http://www.mathjax.org/"
+SRC_URI="https://github.com/mathjax/MathJax/archive/${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="~amd64 ~arm ~arm64 ~ppc ~ppc64 ~x86 ~amd64-linux ~x86-linux"
+IUSE="doc examples"
+
+RDEPEND="doc? ( app-doc/mathjax-docs:${SLOT} )"
+
+RESTRICT="binchecks strip"
+
+S=${WORKDIR}/MathJax-${PV}
+
+make_webconf() {
+	# web server config file - should we really do this?
+	cat > $1 <<-EOF
+		Alias /MathJax/ ${EPREFIX}${webinstalldir}/
+		Alias /mathjax/ ${EPREFIX}${webinstalldir}/
+
+		<Directory ${EPREFIX}${webinstalldir}>
+			Options None
+			AllowOverride None
+			Order allow,deny
+			Allow from all
+		</Directory>
+	EOF
+}
+
+src_prepare() {
+	default
+	egit_clean
+}
+
+src_install() {
+	local DOCS=( README.md )
+	if use doc; then
+		dodir /usr/share/doc/${P}
+		dosym ../${PN}-docs-${SLOT}/html /usr/share/doc/${P}/html
+	fi
+
+	default
+	if use examples; then
+		insinto /usr/share/${PN}/examples
+		doins -r test/*
+	fi
+	rm -r test docs LICENSE README.md || die
+
+	webinstalldir=/usr/share/${PN}
+	insinto ${webinstalldir}
+	doins -r *
+
+	make_webconf MathJax.conf
+	insinto /etc/httpd/conf.d
+	doins MathJax.conf
+}