Added yarn

d/yarn/yarn.SlackBuild

@@ -0,0 +1,54 @@
+#!/bin/sh
+
+CWD=$(pwd)
+PRGNAM=$(basename $CWD)
+TMP=${TMP:-/tmp/$TAG}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+ARCH="noarch"
+VERSION=${VERSION:-$(curl -s https://api.github.com/repos/yarnpkg/yarn/releases/latest | grep tag_name | grep -o "v[0-9.]*" | tr -d v)}
+BUILD=${BUILD:-1}
+TAG=${TAG:-cyco}
+
+rm -rf $PKG
+mkdir -p $PKG/opt $PKG/usr/bin $OUTPUT
+cd $PKG/opt/
+
+wget -c https://github.com/yarnpkg/yarn/releases/download/v${VERSION}/yarn-v${VERSION}.tar.gz -O yarn.tar.gz
+tar xvf yarn.tar.gz
+rm yarn.tar.gz
+mv $PKG/opt/dist $PKG/opt/$PRGNAM
+rm $PKG/opt/$PRGNAM/bin/*.cmd
+
+ln -s /opt/$PRGNAM/bin/yarn $PKG/usr/bin/yarn
+ln -s /opt/$PRGNAM/bin/yarnpkg $PKG/usr/bin/yarnpkg
+
+# Make sure top-level perms are correct:
+chmod 0755 $PKG/usr/bin/yarn*
+
+mkdir -p $PKG/install
+cat <<EOF > $PKG/install/slack-desc
+           # HOW TO EDIT THIS FILE:
+           # The "handy ruler" below makes it easier to edit a package description.  Line
+           # up the first '|' above the ':' following the base package name, and the '|'
+           # on the right side marks the last column you can put a character in.  You must
+           # make exactly 11 lines for the formatting to be correct.  It's also
+           # customary to leave one space after the ':'.
+
+       |-----handy-ruler----------------------------------------------------|
+$PRGNAM: $PRGNAM (package management for JS)
+$PRGNAM:
+$PRGNAM: Fast, reliable, and secure dependency management for Javascript.
+$PRGNAM:
+$PRGNAM:
+$PRGNAM:
+$PRGNAM:
+$PRGNAM:
+$PRGNAM:
+$PRGNAM: Homepage:  https://yarnpkg.com/
+$PRGNAM:
+EOF
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.txz