development/flow: Added (A static type checker for JavaScript).

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

development/flow/README

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+The goal of Flow is to find errors in JavaScript code with little programmer effort.
+Flow relies heavily on type inference to find type errors even when the program has not been annotated
+It precisely tracks the types of variables as they flow through the program.
+
+At the same time, Flow is a gradual type system.
+Any parts of your program that are dynamic in nature can easily bypass the type checker
+so you can mix statically typed code with dynamic code.
+
+Flow also supports a highly expressive type language.
+Flow types can express much more fine-grained distinctions than traditional type systems.
+For example, Flow helps you catch errors involving null, unlike most type systems.

development/flow/flow.SlackBuild

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+#!/bin/sh
+
+# Slackware build script for flow
+
+# Ryan P.C. McQuen | Everett, WA | ryan.q@linux.com
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version, with the following exception:
+# the text of the GPL license may be omitted.
+
+# This program is distributed in the hope that it will be useful, but
+# without any warranty; without even the implied warranty of
+# merchantability or fitness for a particular purpose. Compiling,
+# interpreting, executing or merely reading the text of the program
+# may result in lapses of consciousness and/or very being, up to and
+# including the end of all existence and the Universe as we know it.
+# See the GNU General Public License for more details.
+
+# You may have received a copy of the GNU General Public License along
+# with this program (most likely, a file named COPYING).  If not, see
+# <https://www.gnu.org/licenses/>.
+
+PRGNAM=flow
+VERSION=${VERSION:-0.20.1}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i486 ;;
+    arm*) ARCH=arm ;;
+       *) ARCH=$( uname -m ) ;;
+  esac
+fi
+
+CWD=$(pwd)
+TMP=${TMP:-/tmp/SBo}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+if [ "$ARCH" = "i486" ]; then
+  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "i686" ]; then
+  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "x86_64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  LIBDIRSUFFIX="64"
+else
+  SLKCFLAGS="-O2"
+  LIBDIRSUFFIX=""
+fi
+
+set -e
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $PRGNAM-$VERSION
+if [ -e $CWD/v$VERSION.tar.gz ]; then
+  tar xvf $CWD/v$VERSION.tar.gz
+else
+  tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
+fi
+cd $PRGNAM-$VERSION
+chown -R root:root .
+find -L . \
+ \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
+  -o -perm 511 \) -exec chmod 755 {} \; -o \
+ \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
+  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
+
+# Need to remove this for Slackware 14.2
+sed -i "s|EXTRA_INCLUDE_PATHS=|EXTRA_INCLUDE_PATHS=/usr/include/libelf|" Makefile
+
+CFLAGS="$SLKCFLAGS" \
+CXXFLAGS="$SLKCFLAGS" \
+  make
+
+mkdir -p $PKG/opt/$PRGNAM/ $PKG/usr/bin/
+mv bin/ $PKG/opt/$PRGNAM/
+(
+  cd $PKG/usr/bin
+  ln -sf /opt/$PRGNAM/bin/$PRGNAM $PRGNAM
+)
+
+find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
+  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp -a Changelog.md CONTRIBUTING.md LICENSE PATENTS README.md $PKG/usr/doc/$PRGNAM-$VERSION
+cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}

development/flow/flow.info

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+PRGNAM="flow"
+VERSION="0.20.1"
+HOMEPAGE="http://flowtype.org/"
+DOWNLOAD="https://github.com/facebook/flow/archive/v0.20.1.tar.gz"
+MD5SUM="3a5c5752a0e402c23aaa9730ea70b7be"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+REQUIRES="ocaml"
+MAINTAINER="Ryan P.C. McQuen"
+EMAIL="ryan.q@linux.com"

development/flow/slack-desc

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+# 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 ':' except on otherwise blank lines.
+
+    |-----handy-ruler------------------------------------------------------|
+flow: flow (A static type checker for JavaScript)
+flow:
+flow: Adds static typing to JavaScript to improve developer productivity
+flow: and code quality.
+flow:
+flow:
+flow:
+flow:
+flow:
+flow: http://flowtype.org/
+flow: