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#!/bin/sh
# $Id$
# Copyright 2014, 2015  Eric Hameleers, Eindhoven, NL
# All rights reserved.
#
#   Permission to use, copy, modify, and distribute this software for
#   any purpose with or without fee is hereby granted, provided that
#   the above copyright notice and this permission notice appear in all
#   copies.
#
#   THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
#   WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#   MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
#   IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
#   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
#   USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
#   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
#   OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
#   OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
#   SUCH DAMAGE.
# -----------------------------------------------------------------------------
#
# Slackware SlackBuild script 
# ===========================
# By:          Eric Hameleers <alien@slackware.com>
# For:         chromium-dev-widevine-plugin
# Descr:       Google Chrome's Pepper Widevine plugin for Chromium
# URL:         http://www.google.com/chrome
# Build needs: 
# Needs:       
# Changelog:   
# 42.0.2311.22-1:
#              09/mar/2015 by Eric Hameleers <alien@slackware.com>
#              * First release for chromium-dev.
# 43.0.2327.5-1:
#              10/mar/2015 by Eric Hameleers <alien@slackware.com>
#              * Quick update for the new 43 release.
# 44.0.2398.0-1:
#              15/may/2015 by Eric Hameleers <alien@slackware.com>
#              * Update for the new 44 release.
# 45.0.2414.0-1:
#              02/jun/2015 by Eric Hameleers <alien@slackware.com>
#              * Update for the new 45 release.
# 46.0.2478.0-1:
#              13/aug/2015 by Eric Hameleers <alien@slackware.com>
#              * Update for the new 46 release.
# 48.0.2535.0-1:
#              13/aug/2015 by Eric Hameleers <alien@slackware.com>
#              * Update for the new 48 release.
# 49.0.2593.0-1:
#              27/dec/2015 by Eric Hameleers <alien@slackware.com>
#              * Update for the new 49 release.
# 1.4.8.1008-1:
#              01/nov/2017 by Eric Hameleers <alien@slackware.com>
#              * Start using the widevine version number now that we use
#                a direct download, no longer extracting from Chrome binaries.
# 
# Run 'sh chromium-dev-widevine-plugin.SlackBuild' to build a Slackware package.
# The package (.txz) and .txt file as well as build logs are created in /tmp .
# Install it using 'installpkg'. 
#
# -----------------------------------------------------------------------------

SRCNAM="chromium"
SRCEXT="-dev"        # "" is stable, "-dev" is development
PRGNAM="${SRCNAM}${SRCEXT}-widevine-plugin"

VERSION=${VERSION:-"1.4.8.1008"}
BUILD=${BUILD:-1}
TAG=${TAG:-alien}

# Where do we look for sources?
SRCDIR=$(cd $(dirname $0); pwd)

DOCS="manifest.json LICENSE.txt"

# Place to build (TMP) package (PKG) and output (OUTPUT) the program:
TMP=${TMP:-/tmp/build}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

# Automatically determine the architecture we're building on:
MARCH=${ARCH:-$( uname -m )}
case "$MARCH" in
  x86_64)
    LIBDIRSUFFIX="64"
    export ARCH=x86_64
    ;;
  i?86)
    LIBDIRSUFFIX=""
    export ARCH=i386
    ;;
  *)
    echo "Unsupported architecture '$ARCH'"
    exit 1
    ;;
esac

# Each zip contains a CDM binary, manifest.json file, and LICENSE.txt file.
# Current version can be read online:
# https://redirector.gvt1.com/edgedl/widevine-cdm/current.txt
# This is where Mozilla gets it:
# https://github.com/mozilla/gecko-dev/blob/release/toolkit/content/gmp-sources/widevinecdm.json

SOURCE[0]="$SRCDIR/current.txt"
SRCURL[0]="https://redirector.gvt1.com/edgedl/widevine-cdm/current.txt"

if [ "$ARCH" = "x86_64" ]; then
  SOURCE[1]="$SRCDIR/${VERSION}-linux-x64.zip"
  SRCURL[1]="https://redirector.gvt1.com/edgedl/widevine-cdm/${VERSION}-linux-x64.zip"
else
  SOURCE[1]="$SRCDIR/${VERSION}-linux-ia32.zip"
  SRCURL[1]="https://redirector.gvt1.com/edgedl/widevine-cdm/${VERSION}-linux-ia32.zip"
fi

##
## --- with a little luck, you won't have to edit below this point --- ##
##

# Exit the script on errors:
set -e
trap 'echo "$0 FAILED at line ${LINENO}" | tee $OUTPUT/error-${PRGNAM}.log' ERR
# Catch unitialized variables:
set -u
P1=${1:-1}

# Save old umask and set to 0022:
_UMASK_=$(umask)
umask 0022

# Create working directories:
mkdir -p $OUTPUT          # place for the package to be saved
mkdir -p $TMP/tmp-$PRGNAM # location to build the source
mkdir -p $PKG             # place for the package to be built
rm -rf $PKG/*             # always erase old package's contents
rm -rf $TMP/tmp-$PRGNAM/* # remove the remnants of previous build
rm -rf $OUTPUT/{configure,make,install,error,makepkg,patch}-$PRGNAM.log
                          # remove old log files

# Source file availability:
for (( i = 0; i < ${#SOURCE[*]}; i++ )) ; do
  if ! [ -f ${SOURCE[$i]} ]; then
    echo "Source '$(basename ${SOURCE[$i]})' not available yet..."
    # Check if the $SRCDIR is writable at all - if not, download to $OUTPUT
    [ -w "$SRCDIR" ] || SOURCE[$i]="$OUTPUT/$(basename ${SOURCE[$i]})"
    if [ -f ${SOURCE[$i]} ]; then echo "Ah, found it!"; continue; fi
    if ! [ "x${SRCURL[$i]}" == "x" ]; then
      echo "Will download file to $(dirname $SOURCE[$i])"
      curl -L -s -k -o "${SOURCE[$i]}" "${SRCURL[$i]}" || true
      if [ $? -ne 0 -o ! -s "${SOURCE[$i]}" ]; then
        echo "Fail to download '$(basename ${SOURCE[$i]})'. Aborting the build."
        mv -f "${SOURCE[$i]}" "${SOURCE[$i]}".FAIL
        exit 1
      fi
    else
      echo "File '$(basename ${SOURCE[$i]})' not available. Aborting the build."
      exit 1
    fi
  fi
done

if [ "$P1" == "--download" ]; then
  echo "Download complete."
  echo "Check that the following match your expectations:"
  echo ">> Current online version; $(curl -L -s -k -o - ${SRCURL[0]})"
  echo ">> Widevine version as reported by downloaded files: $(unzip -p ${SOURCE[1]} manifest.json |grep '\"version\":' |cut -d\" -f4)"
  echo ">> Widevine package version: $VERSION"
  exit 0
fi

# --- PACKAGE BUILDING ---

cd $TMP/tmp-$PRGNAM
echo "Extracting the source archive(s) for $PRGNAM..."
unzip ${SOURCE[1]}
chmod -R u+w,go+r-w,a+X-s .

# Move the extracted files over to the package location:
install -d  $PKG/usr/lib${LIBDIRSUFFIX}/$SRCNAM$SRCEXT
install -m0755 libwidevine* \
  $PKG/usr/lib${LIBDIRSUFFIX}/$SRCNAM$SRCEXT/

# Add documentation:
mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a $DOCS $PKG/usr/doc/$PRGNAM-$VERSION || true
cat $SRCDIR/$(basename $0) > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
chown -R root:root $PKG/usr/doc/$PRGNAM-$VERSION
find $PKG/usr/doc -type f -exec chmod 644 {} \;

# Add a package description:
mkdir -p $PKG/install
cat $SRCDIR/slack-desc > $PKG/install/slack-desc
cat $SRCDIR/slack-required > $PKG/install/slack-required
cat $SRCDIR/doinst.sh \
  | sed -e "s/@PRGNAM@/${PRGNAM}/g" -e "s/@CHROMIUM@/${SRCNAM}${SRCEXT}/g" \
  > $PKG/install/doinst.sh

# Build the package:
cd $PKG
makepkg --linkadd y --chown n $OUTPUT/${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.${PKGTYPE:-txz} 2>&1 | tee $OUTPUT/makepkg-${PRGNAM}.log
cd $OUTPUT
md5sum ${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.${PKGTYPE:-txz} > ${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.${PKGTYPE:-txz}.md5
cd -
cat $PKG/install/slack-desc | grep "^${PRGNAM}" > $OUTPUT/${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.txt
cat $PKG/install/slack-required > $OUTPUT/${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.dep

# Restore the original umask:
umask ${_UMASK_}