install_sdp_perl.sh #1

#!/bin/bash

#==============================================================================
# Copyright and license info is available in the LICENSE file included with
# the Server Deployment Package (SDP), and also available online:
# https://swarm.workshop.perforce.com/projects/perforce-software-sdp/view/main/LICENSE
#------------------------------------------------------------------------------

#==============================================================================
# Declarations and Environment

# Allow override of P4U_HOME, which is set only when testing P4U scripts.
export P4CBIN=${P4CBIN:-/p4/common/bin}
export P4U_HOME=${P4U_HOME:-/p4/common/bin}
export P4U_LIB=${P4U_LIB:-/p4/common/lib}
export P4U_ENV=$P4U_LIB/p4u_env.sh
export P4U_LOG="/tmp/install_sdp_perl.sh.$(date +'%Y%m%d-%H%M%S').log"
export VERBOSITY=${VERBOSITY:-3}

# Environment isolation.  For stability and security reasons, prepend
# PATH to include dirs where known-good scripts exist.
# known/tested PATH and, by implication, executables on the PATH.
export PATH=$P4U_HOME:$PATH:~/bin:/usr/local/bin:$PATH
export P4CONFIG=${P4CONFIG:-.p4config}

[[ -r "$P4U_ENV" ]] || {
   echo -e "\nError: Cannot load environment from: $P4U_ENV\n\n"
   exit 1
}

declare BASH_LIBS="$P4U_ENV $P4U_LIB/libcore.sh $P4U_LIB/libp4u.sh"

for bash_lib in $BASH_LIBS; do
   source $bash_lib
done

declare Version=1.7.1
declare -i SilentMode=0

#==============================================================================
# Local Functions

#------------------------------------------------------------------------------
# Function: terminate
function terminate
{
   # Disable signal trapping.
   trap - EXIT SIGINT SIGTERM

   # Don't litter.
   cleanTrash

   vvmsg "$THISSCRIPT: EXITCODE: $OverallReturnStatus"

   # Stop logging.
   [[ "${P4U_LOG}" == off ]] || stoplog

   # With the trap removed, exit.
   exit $OverallReturnStatus
}

#------------------------------------------------------------------------------
# Function: usage (required function)
#
# Input:
# $1 - style, either -h (for short form) or -man (for man-page like format).
#------------------------------------------------------------------------------
function usage
{
   declare style=${1:--h}

   echo "USAGE for $THISSCRIPT v$Version:

$THISSCRIPT [-f] [-L <log>] [-si] [-v<n>] [-n] [-D]

or

$THISSCRIPT [-h|-man|-V]
"
   if [[ $style == -man ]]; then
      echo -e "
DESCRIPTION:
	This builds installs ActivePerl, the Perforce API, and
	P4Perl to the standard SDP location.

PLATFORM SUPPORT:
	This works on Red Hat Linux and CentOS platforms.  It works on
	CentOS 6.4 thru 6.8 and likely on other Linux derivatives
	with no modification.

	It supports the bin.linux26_64 (Linux) and bin.darwin90x86_64
	(Mac OSX/Darwin) architectures.

REQUIREMENTS:
	The Perforce Server Deployment Packge (Rev SDP/Unix/2014.3+)
	must be installed and configured.  In particular the SDP
	Environment file [$SDPEnvFile] must define
	a value for OSUSER.

	Development utilities such as 'make' and the 'gcc' compiler
	must be installed and available in the PATH.

	The 'wget' utility must be installed and available in the
	PATH.  (Note that 'wget' is not installed with OSX by
	default, at least not os of OSX 10.9/Mavericks.  However,
	it can be acquired and compiled using XCode).

OPTIONS:

 -f 	Specify -f (force) to re-install the SDP Perl if it is
	already installed.  By default, in will be installed only
	if the Perl root dir, $PerlRoot, does not exist.

 -v<n>	Set verbosity 1-5 (-v1 = quiet, -v5 = highest).

 -L <log>
	Specify the path to a log file, or the special value 'off' to disable
	logging.  By default, all output (stdout and stderr) goes to:
	$(dirname ${P4U_LOG}).

	NOTE: This script is self-logging.  That is, output displayed on the screen
	is simultaneously captured in the log file.  Do not run this script with
	redirection operators like '> log' or '2>&1', and do not use 'tee.'

 -si	Operate silently.  All output (stdout and stderr) is redirected to the log
	only; no output appears on the terminal.  This cannot be used with
	'-L off'.
      
 -n	No-Op.  Prints commands instead of running them.

 -D     Set extreme debugging verbosity.

HELP OPTIONS:
 -h	Display short help message
 -man	Display man-style help message
 -V	Dispay version info for this script and its libraries.

FILES:

EXAMPLES:

SEE ALSO:
"
   fi

   exit 1
}

#==============================================================================
# Command Line Processing

declare -i shiftArgs=0
declare -i Force=0
declare -i KeepWorkingDir=1
declare PerlRoot=/p4/common/perl
declare Tmp=${P4TMP:-/tmp}
declare APIDir=
declare ApiArch=
declare RunUser=
declare RunArch=x86_64
declare PerforceRel=r16.1
declare PublicDepotPort=public.perforce.com:1666
declare PublicDepotReaderUser=sdp_reader
declare P4PerlPublicDepotPath=//p4perl/$PerforceRel/...
declare P4PerlCloneCmd=
declare SDPEnvFile=/p4/common/bin/p4_vars
declare ThisArch=
declare ThisOS=
declare WorkingDir=$Tmp/p4perl.$$.$RANDOM

set +u
while [[ $# -gt 0 ]]; do
   case $1 in
      (-f) Force=1;;
      (-h) usage -h;;
      (-man) usage -man;;
      (-V) show_versions; exit 1;;
      (-v1) export VERBOSITY=1;;
      (-v2) export VERBOSITY=2;;
      (-v3) export VERBOSITY=3;;
      (-v4) export VERBOSITY=4;;
      (-v5) export VERBOSITY=5;;
      (-L) export P4U_LOG=$2; shiftArgs=1;;
      (-si) SilentMode=1;;
      (-n) export NO_OP=1;;
      (-D) set -x;; # Debug; use 'set -x' mode.
      (*) usageError "Unknown arg ($1).";;
   esac

   # Shift (modify $#) the appropriate number of times.
   shift; while [[ $shiftArgs -gt 0 ]]; do
      [[ $# -eq 0 ]] && usageError "Bad usage."
      shiftArgs=$shiftArgs-1
      shift
   done
done
set -u

[[ $KeepWorkingDir -eq 0 ]] && GARBAGE+="$WorkingDir"

#==============================================================================
# Command Line Verification

[[ $SilentMode -eq 1 && $P4U_LOG == off ]] && \
   usageError "Cannot use '-si' with '-L off'."

#==============================================================================
# Main Program

trap terminate EXIT SIGINT SIGTERM

declare -i OverallReturnStatus=0

[[ ! -d $Tmp ]] && bail "Missing SDP tmp dir [$Tmp]. Aborting."

if [[ "${P4U_LOG}" != off ]]; then
   touch ${P4U_LOG} || bail "Couldn't touch log file [${P4U_LOG}]."

   # Redirect stdout and stderr to a log file.
   if [[ $SilentMode -eq 0 ]]; then
      exec > >(tee ${P4U_LOG})
      exec 2>&1
   else
      exec >${P4U_LOG}
      exec 2>&1
   fi

   initlog
fi

if [[ ! -r "$SDPEnvFile" ]]; then
   bail "Missing or unreadable SDP Environment File [$SDPEnvFile].  Aborting."
fi

RunUser=$(grep '^export OSUSER=' $SDPEnvFile |\
   tail -1 | cut -d '=' -f 2)
RunUser=$(echo $RunUser)

if [[ -n "$RunUser" ]]; then
   msg "The OSUSER defined in the SDP environment file is $RunUser."
else
   bail "Could not detect OSUSER in SDP environment file [$SDPEnvFile]. Aborting."
fi

if [[ $USER == $RunUser ]]; then
   msg "Verified:  Running as $USER."
else
   bail "Running as $USER.  Run this only as the OSUSER [$RunUser] defined in the SDP Environment File [$SDPEnvFile]. Aborting."
fi

msg "Starting $THISSCRIPT v$Version at $(date) with command line:\n\t$CMDLINE\n\n"

msg "Verifying dependencies."

[[ -z "$(which gcc 2>/dev/null)" || -z "$(which g++ 2>/dev/null)" ]] && \
   bail "No gcc found in the path.  You may need to install it.  Please\n check that the gcc.x86_64 and gcc-c++.x86_64 packages are\n installed, e.g. with:\n\tyum install -y gcc.x86_64 gcc-c++.x86_64\n\n"

[[ -z "$(which wget 2>/dev/null)" ]] && \
   bail "No wget found in the path.  You may need to install it.  Please check that the wget.x86_64 packages is installed, e.g. with:\n\tyum install -y wget.x86_64\n\n"

ThisArch=$(uname -m)

if [[ $ThisArch == $RunArch ]]; then
   msg "Verified:  Running on a supported architecture [$ThisArch]."
   ThisOS=$(uname -s)
   ApiArch=UNDEFINED_API_ARCH
   case $ThisOS in
      (Darwin) ApiArch="darwin90x86_64";;
      (Linux) ApiArch="linux26x86_64";;
      (*) bail "Unsupported value returned by 'uname -m': $ThisOS. Aborting.";;
   esac
else
   bail "Running on architecture $ThisArch.  Run this only on hosts with '$RunArch' architecture. Aborting."
fi

if [[ -d $PerlRoot ]]; then
   if [[ $Force -eq 0 ]]; then
      bail "The SDP Perl root directory exists: [$PerlRoot]. Aborting."
   else
      run "/bin/rm -rf $PerlRoot" || bail "Could not remove SDP Perl root dir [$PerlRoot]. Aborting."
   fi
fi

if [[ ! -d $WorkingDir ]]; then
   run "/bin/mkdir -p $WorkingDir" || bail "Could not create working dir [$WorkingDir]."
fi

cd "$WorkingDir" || bail "Could not cd to [$WorkingDir]."

if [[ -d ws/.p4root ]]; then
   if [[ $Force -eq 0 ]]; then
      msg "Skipping clone of existing p4perl cloned workspace."

      export P4CONFIG=.p4config.p4perl.local
      export P4ENVIRO=/dev/null/.p4enviro
      msg "Fetching latest updates from Workshop in cloned p4perl workspace in $PWD."
      run "p4 -d $PWD/ws fetch" || bail "Failed to update p4perl cloned workspace."
   else
      msg "Removing existing p4perl clone workspace."
      run "/bin/rm -rf $PWD/ws" || bail "Could not remove p4perl workspace dir [$PWD/ws]. Aborting."
      unset P4CONFIG P4ENVIRO
   fi
fi

if [[ ! -d $PWD/ws/.p4root ]]; then
   run "mkdir ws" "Creating base dir for cloning P4Perl, $PWD/ws." ||\
      bail "Failed to create dir [$PWD/ws] for cloning P4Perl."

   export P4ENVIRO=/dev/null/.p4enviro
   export P4CONFIG=.p4config.p4perl.local
   run "p4 -u $PublicDepotReaderUser -d $PWD/ws clone -p $PublicDepotPort -f $P4PerlPublicDepotPath" ||\
      bail "Failed to clone P4Perl from The Workshop [P4PORT=$PublicDepotPort]."
   unset P4CONFIG P4ENVIRO
fi

cd "$WorkingDir/ws" || bail "Could not cd to [$WorkingDir/ws]."

run "./install_p4perl.sh -r $PerlRoot -b $PerforceRel" \
   "Calling install_p4perl.sh from P4Perl package to build/install Perl/P4Perl $PerforceRel." ||\
   bail "Failed to build and install P4Perl."

export PATH=$PerlRoot/site/bin:$PerlRoot/bin:$PATH

msg "Add this to your PATH:  $PerlRoot/site/bin:$PerlRoot/bin"
msg "Add this to your MANPATH:  $PerlRoot/site/man:$PerlRoot/man"

if [[ $OverallReturnStatus -eq 0 ]]; then
   msg "${H}\nSuccess.  P4Perl is ready.\n"
else
   msg "${H}\nProcessing completed, but with errors.  Scan above output carefully.\n" 
fi

# Illustrate using $SECONDS to display runtime of a script.
msg "That took about $(($SECONDS/3600)) hours $(($SECONDS%3600/60)) minutes $(($SECONDS%60)) seconds.\n"

# See the terminate() function, which is really where this script exits.
exit $OverallReturnStatus