#!/bin/bash
# -*- coding: utf-8; mode: shell-script-mode; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- vim:fenc=utf-8:filetype=sh:et:sw=4:ts=4:sts=4
#
# Copyright (c) 2008-2012 The MacPorts Project
# Copyright (c) 2002-2007 Juan Manuel Palacios <jmpp@macports.org>, The MacPorts Project.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. Neither the name of The MacPorts Project nor the
#    names of its contributors may be used to endorse or promote products
#    derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS 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 COPYRIGHT OWNER OR 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.
#
# postflight

#set -x

# Script identification:
VERSION=2.10

# Abstraction variables:
PREFIX="/opt/local"
BINPATH=${PREFIX}/bin
SBINPATH=${PREFIX}/sbin
CONFIGPATH=${PREFIX}/etc/macports
MANPAGES=${PREFIX}/share/man
DSCL=/usr/bin/dscl
OS_MAJOR=$(uname -r | cut -d . -f 1)
RUNUSR=macports
TCLSH="/opt/local/libexec/macports/bin/tclsh8.6"
TCL_PACKAGE_PATH="/opt/local/libexec/macports/lib"
TIMESTAMP=$(date +"%Y-%m-%d_at_%H:%M:%S")
BACKUP_SUFFIX=macports-saved_${TIMESTAMP}
OUR_BASESTRING="MacPorts Installer addition"
OUR_STRING="${OUR_BASESTRING} on ${TIMESTAMP}"

OLD_MACPORTS_TCL_DIR=${PREFIX}/share/macports/Tcl
OLD_TCL_PACKAGE_DIR=/Library/Tcl
OLD_TCL_FILES="tcl8/8.4/http-2.7.12.tm tcl8/8.4/http-2.7.13.tm \
tcl8/8.6/http-2.9.5.tm \
tcl8/8.4/platform-1.0.12.tm tcl8/8.4/platform-1.0.13.tm \
tcl8/8.4/platform-1.0.14.tm tcl8/8.4/platform-1.0.18.tm \
tcl8/8.5/msgcat-1.5.2.tm \
tcl8/8.5/tcltest-2.3.5.tm tcl8/8.5/tcltest-2.3.8.tm \
tcl8/8.5/tcltest-2.5.3.tm tcl8/8.5/tcltest-2.5.5.tm \
tcl8/8.5/tcltest-2.5.7.tm tcl8/8.5/tcltest-2.5.8.tm \
tcl8/8.6/tdbc/sqlite3-1.1.3.tm tcl8/8.6/tdbc/sqlite3-1.1.5.tm \
tcl8/8.6/tdbc/sqlite3-1.1.7.tm tcl8/8.6/tdbc/sqlite3-1.1.9.tm \
tcl8/8.6/tdbc/sqlite3-1.1.9.uuid \
libtcl8.5.dylib libtclstub8.5.a"
OLD_VENDOR_DIRS="thread2.7.0 thread2.7.2 thread2.7.3 thread2.8.7 \
thread2.8.8 thread2.8.9 thread2.8.10 \
tcllib1.15 tcllib1.17 tcllib1.18 tcllib1.21 tclx8.4 tcl8.5 \
itcl4.2.2 itcl4.2.3 itcl4.2.4 itcl4.3.0 \
sqlite3.36.0 sqlite3.40.0 sqlite3.44.2 sqlite3.45.3 \
tdbc1.1.3 tdbcmysql1.1.3 tdbcodbc1.1.3 tdbcpostgres1.1.3 \
tdbc1.1.5 tdbcmysql1.1.5 tdbcodbc1.1.5 tdbcpostgres1.1.5 \
tdbc1.1.7 tdbcmysql1.1.7 tdbcodbc1.1.7 tdbcpostgres1.1.7 \
tdbc1.1.9 tdbcmysql1.1.9 tdbcodbc1.1.9 tdbcpostgres1.1.9"

# Create config files from defaults if not present
function setup_configs {
    for f in archive_sites.conf macports.conf pubkeys.conf sources.conf variants.conf ; do
        if [[ ! -f ${CONFIGPATH}/${f} ]]; then
            echo "Copying ${f}.default to ${f}"
            /bin/cp "${CONFIGPATH}/${f}.default" "${CONFIGPATH}/${f}"
            /bin/chmod 644 "${CONFIGPATH}/${f}"
        fi
    done
}

# Command to update the MacPorts installation through "selfupdate":
function update_macports {
    SCRIPT_DIR=$(dirname "$0")
    # Add [default] tag to the central MacPorts repository, if it isn't already
    echo "Adding [default] tag to sources.conf if needed..."
    "${TCLSH}" "${SCRIPT_DIR}/upgrade_sources_conf_default.tcl" "${PREFIX}"
    # Convert image directories (and direct mode installs) to image archives
    echo "Updating port image format..."
    "${TCLSH}" "${SCRIPT_DIR}/images_to_archives.tcl"
    "${TCLSH}" "${SCRIPT_DIR}/dedup_portfiles.tcl"
    "${TCLSH}" "${SCRIPT_DIR}/cxx_stdlib_overridden.tcl"

    echo "Please run 'sudo port sync' to update ports sources."
    echo "Successful!"
}

# Through this command we write an environment variable to an appropriate shell configuration file,
# backing up the original only if it exists and if it doesn't contain the ${OUR_STRING} identification string,
# which hints that we've already tweaked it and therefore already backed it up.
function write_setting () {
    if [[ -f "${HOME}/.${CONF_FILE}" ]] && ! grep "${OUR_BASESTRING}" "${HOME}/.${CONF_FILE}" > /dev/null; then
        echo "Backing up your ${HOME}/.${CONF_FILE} shell configuration file as ${HOME}/.${CONF_FILE}.${BACKUP_SUFFIX} before adapting it for MacPorts."
        /bin/cp -fp "${HOME}/.${CONF_FILE}" "${HOME}/.${CONF_FILE}.${BACKUP_SUFFIX}" || {
            echo "An attempt to backup your original configuration file failed! Please set your MacPorts compatible environment manually."
            update_macports
            exit 1
        }
        echo -e "\n##\n# Your previous ${HOME}/.${CONF_FILE} file was backed up as ${HOME}/.${CONF_FILE}.${BACKUP_SUFFIX}\n##" >> "${HOME}/.${CONF_FILE}"
    fi
    {
        echo -e "\n# ${OUR_STRING}: adding an appropriate ${1} variable for use with MacPorts."
        echo "${ENV_COMMAND} ${1}${ASSIGN}${2}"
        echo -e "# Finished adapting your ${1} environment variable for use with MacPorts.\n"
    } >> "${HOME}/.${CONF_FILE}"
    chown "${USER}" "${HOME}/.${CONF_FILE}" || echo "Warning: unable to adapt permissions on your ${HOME}/.${CONF_FILE} shell configuration file!"
    echo "An appropriate ${1} variable has been added to your shell environment by the MacPorts installer."
}

function cleanup_man () {
    # Remove old non-compressed man pages
    echo -e "\nRemoving old man pages..."
    MAN1="port.1"
    MAN5="macports.conf.5"
    MAN7="portfile.7 portstyle.7 porthier.7 portgroup.7"
    for m in ${MAN1}; do rm -vf "${MANPAGES}/man1/$m" ; done
    for m in ${MAN5}; do rm -vf "${MANPAGES}/man5/$m" ; done
    for m in ${MAN7}; do rm -vf "${MANPAGES}/man7/$m" ; done
    echo -e "Done.\n"
}

# delete macports1.0 link from old tcl package dir
function delete_old_tcl_package_link {
    # delete old link if present
    if [[ -e "${OLD_TCL_PACKAGE_DIR}/macports1.0" ]]; then
        rm -vrf "${OLD_TCL_PACKAGE_DIR}/macports1.0"
    fi

    # delete old macports1.0 link from new tcl package dir if present
    if [[ -L "${TCL_PACKAGE_PATH}/macports1.0" ]]; then
        rm -vrf "${TCL_PACKAGE_PATH}/macports1.0"
    fi
}

# delete the old tcl package location in share/macports/Tcl
function delete_old_tcl_packages {
    if [[ -d "${OLD_MACPORTS_TCL_DIR}" ]]; then
        rm -vrf "${OLD_MACPORTS_TCL_DIR}"
    fi
    for f in ${OLD_TCL_FILES}; do
        if [[ -f "${TCL_PACKAGE_PATH}/${f}" ]]; then
            rm -vf "${TCL_PACKAGE_PATH}/${f}"
        fi
    done
    for d in ${OLD_VENDOR_DIRS}; do
        if [[ -d "${TCL_PACKAGE_PATH}/${d}" ]]; then
            rm -vrf "${TCL_PACKAGE_PATH}/${d}"
        fi
    done
    oldtclsh="$(dirname "${TCLSH}")/tclsh8.5"
    if [[ -f "${oldtclsh}" ]]; then
        rm -vf "${oldtclsh}"
    fi
}

# create the user to use for privilege dropping
function create_run_user {
    DSEDITGROUP=/usr/sbin/dseditgroup
    if ! ${DSCL} -q . -read "/Groups/${RUNUSR}" > /dev/null 2>&1 ; then
        echo "Creating group \"${RUNUSR}\""
        ${DSEDITGROUP} -q -o create "${RUNUSR}"
    fi
    if ! ${DSCL} -q . -list "/Users/${RUNUSR}" > /dev/null 2>&1 ; then
        echo "Creating user \"${RUNUSR}\""
        NEXTUID=501
        while [[ -n "$(${DSCL} -q /Search -search /Users UniqueID $NEXTUID)" ]]; do
            NEXTUID=$((NEXTUID+1))
        done
        ${DSCL} -q . -create "/Users/${RUNUSR}" UniqueID $NEXTUID

        # These are implicitly added on Mac OS X Lion.  AuthenticationAuthority
        # causes the user to be visible in the Users & Groups Preference Pane,
        # and the others are just noise, so delete them.
        # https://trac.macports.org/ticket/30168
        ${DSCL} -q . -delete "/Users/${RUNUSR}" AuthenticationAuthority
        ${DSCL} -q . -delete "/Users/${RUNUSR}" PasswordPolicyOptions
        ${DSCL} -q . -delete "/Users/${RUNUSR}" dsAttrTypeNative:KerberosKeys
        ${DSCL} -q . -delete "/Users/${RUNUSR}" dsAttrTypeNative:ShadowHashData

        ${DSCL} -q . -create "/Users/${RUNUSR}" RealName MacPorts
        ${DSCL} -q . -create "/Users/${RUNUSR}" Password "*"
        ${DSCL} -q . -create "/Users/${RUNUSR}" PrimaryGroupID "$(${DSCL} -q . -read "/Groups/${RUNUSR}" PrimaryGroupID | /usr/bin/awk '{print $2}')"
        ${DSCL} -q . -create "/Users/${RUNUSR}" NFSHomeDirectory "${PREFIX}/var/macports/home"
        ${DSCL} -q . -create "/Users/${RUNUSR}" UserShell /usr/bin/false
    fi
    RUNUSR_UID=$(${DSCL} -q . -read "/Users/${RUNUSR}" UniqueID | /usr/bin/awk '{print $2}')
    RUNUSR_NAME=$(${DSCL} -q . -read "/Users/${RUNUSR}" RealName | /usr/bin/awk '{print $2}')
    RUNUSR_SHELL=$(${DSCL} -q . -read "/Users/${RUNUSR}" UserShell | /usr/bin/awk '{print $2}')
    if test "$RUNUSR_UID" -gt 500 -a "$RUNUSR_SHELL" = "/usr/bin/false" -a "$RUNUSR_NAME" = "MacPorts"; then
        if [[ "$(${DSCL} -q . -read "/Users/${RUNUSR}" NFSHomeDirectory)" != "NFSHomeDirectory: ${PREFIX}/var/macports/home" ]]; then
            echo "Updating home directory location for user \"${RUNUSR}\""
            if ! ${DSCL} -q . -create "/Users/${RUNUSR}" NFSHomeDirectory "${PREFIX}/var/macports/home" ; then
                echo "Failed to update home directory!"
                echo "Please ask the system administrator to manually run:"
                echo "    ${DSCL} -q . -create \"/Users/${RUNUSR}\" NFSHomeDirectory \"${PREFIX}/var/macports/home\""
            fi
        fi
    else
        echo "Warning: '${RUNUSR}' user has unexpected atrributes:"
        if test "$RUNUSR_UID" -le 500; then
            echo "UniqueID: $RUNUSR_UID (expected > 500)"
        fi
        if test "$RUNUSR_NAME" != "MacPorts"; then
            echo "RealName: $RUNUSR_NAME (expected 'MacPorts')"
        fi
        if test "$RUNUSR_SHELL" != "/usr/bin/false"; then
            echo "UserShell: $RUNUSR_SHELL (expected '/usr/bin/false')"
        fi
    fi
}

echo "The MacPorts Project, postflight script version ${VERSION}: checking the shell environment for user \"${USER}\"."

# create macports user
create_run_user
# Set up config files
setup_configs

# Remove old stuff
cleanup_man
delete_old_tcl_package_link
delete_old_tcl_packages

# Move ping cache to new location
if [[ -f "${PREFIX}/var/macports/pingtimes" ]]; then
    mv "${PREFIX}/var/macports/pingtimes" "${PREFIX}/var/macports/cache/pingtimes"
fi

# Determine the user's shell, in order to choose an appropriate configuration file we'll be tweaking.
# Exit nicely if the shell is any other than bash or tcsh, as that's considered non-standard.
USHELL=$(${DSCL} . -read "/Users/${USER}" UserShell) || {
    echo "An attempt to determine your shell name failed! Please set your MacPorts compatible environment manually."
    update_macports
    exit 1
}
# leave full path to shell
USHELL=${USHELL#*shell: }

case "${USHELL}" in
    */tcsh)
        echo "Detected the tcsh shell."
        ENV_COMMAND="setenv"
        ASSIGN=" "
        if [[ -f "${HOME}/.tcshrc" ]]; then
            CONF_FILE=tcshrc
        elif [[ -f "${HOME}/.cshrc" ]]; then
            CONF_FILE=cshrc
        else
            CONF_FILE=tcshrc
        fi
        ;;
    */bash)
        echo "Detected the bash shell."
        ENV_COMMAND="export"
        ASSIGN="="
        if [[ -f "${HOME}/.bash_profile" ]]; then
            CONF_FILE=bash_profile
        elif [[ -f "${HOME}/.bash_login" ]]; then
            CONF_FILE=bash_login
        else
            CONF_FILE=profile
        fi
        ;;
    */zsh)
        echo "Detected the zsh shell."
        ENV_COMMAND="export"
        ASSIGN="="
        CONF_FILE="zprofile"
        ;;
    *)
        echo "Unknown shell ($USHELL)! Please set your MacPorts compatible environment manually."
        update_macports
        exit 0
        ;;
esac

# Adding our setting to the PATH variable if not already there:
# Run as the $USER: /usr/bin/su $USER -l
# Run a command in the shell: -c "/usr/bin/printenv PATH"
# Only process the last line output (profile may print info): tail -n 1
# Output each path on its own line: tr ":" "\n"
# Look for exactly the BINPATH: grep "^${BINPATH}$"
if /usr/bin/su "${USER}" -l -c "/usr/bin/printenv PATH" | tail -n 1 | tr ":" "\n" | grep "^${BINPATH}$" > /dev/null; then
    echo "Your shell already has the right PATH environment variable for use with MacPorts!"
else
    write_setting PATH "\"${BINPATH}:${SBINPATH}:\$PATH\""
fi

# Adding our setting to the MANPATH variable only if it exists:
if /usr/bin/su "${USER}" -l -c "/usr/bin/printenv MANPATH" > /dev/null; then
    # check for MANPAGES already in MANPATH
    if /usr/bin/su "${USER}" -l -c "/usr/bin/printenv MANPATH" | tail -n 1 | tr ":" "\n" | grep "^${MANPAGES}$" >/dev/null; then
        echo "Your shell already has the right MANPATH environment variable for use with MacPorts!"
    else
        write_setting MANPATH "\"${MANPAGES}:\$MANPATH\""
    fi
fi

# Postflight script is done with its job, update MacPorts and exit gracefully!
update_macports
echo "You have successfully installed the MacPorts system. Launch a terminal and try it out!"
echo "Read the port(1) manual page and https://guide.macports.org/ for help."
echo "See https://www.macports.org/contact.php if you need to get in touch with The MacPorts Project."
exit 0
