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#!/bin/bash
###### Set some default variables or get them from the setup script ######
TITLE="Flexible Installer Framework for Arch linux"
LOG="/dev/tty7"
###### Miscalleaneous functions ######
usage ()
{
#NOTE: you can't use dia mode here yet because lib-ui isn't sourced yet. But cli is ok for this anyway.
msg="$0 <procedurename>\n
If the procedurename starts with 'http://' it will be wget'ed. Otherwise it's assumed to be a procedure in the VFS tree
If the procedurename is prefixed with '<modulename>/' it will be loaded from user module <modulename>. See README\n
Available procedures on the filesystem:
`find /home/arch/fifa/core/procedures -type f`\n
`find /home/arch/fifa/user/*/procedures -type f 2>/dev/null`"
echo -e "$msg"
}
##### TMP functions that we need during early bootstrap but will be overidden with decent functions by libraries ######
notify ()
{
echo -e "$@"
}
log ()
{
echo -e "[LOG] `date +"%Y-%m-%d %H:%M:%S"` $@"
echo -e "[LOG] `date +"%Y-%m-%d %H:%M:%S"` $@" >$LOG
}
debug ()
{
[ "$DEBUG" = "1" ] && echo -e "[DEBUG] $@"
[ "$DEBUG" = "1" ] && echo -e "[DEBUG] $@" >$LOG
}
###### Core functions ######
# $1 module name
load_module ()
{
[ -z "$1" ] && die_error "load_module needs a module argument"
log "Loading module $1 ..."
path=/home/arch/fifa/user/"$1"
[ "$1" = core ] && path=/home/arch/fifa/core
for submodule in lib #procedure don't load procedures automatically!
do
if [ ! -d "$path/${submodule}s" ]
then
# ignore this problem for not-core modules
[ "$1" = core ] && die_error "$path/${submodule}s does not exist. something is horribly wrong with this installation"
else
shopt -s nullglob
for i in "$path/${submodule}s"/*
do
load_${submodule} "$1" "`basename "$i"`"
done
fi
done
}
# $1 module name
# $2 procedure name
load_procedure()
{
[ -z "$1" ] && die_error "load_procedure needs a module as \$1 and procedure as \$2"
[ -z "$2" ] && die_error "load_procedure needs a procedure as \$2"
if [ "$1" = 'http:' ]
then
log "Loading procedure $2 ..."
procedure=/home/arch/fifa/runtime/procedure-downloaded-`basename $2`
wget "$2" -q -O $procedure >/dev/null || die_error "Could not download procedure $2"
else
log "Loading procedure $1/procedures/$2 ..."
procedure=/home/arch/fifa/user/"$1"/procedures/"$2"
[ "$1" = core ] && procedure=/home/arch/fifa/core/procedures/"$2"
fi
[ -f "$procedure" ] && source "$procedure" || die_error "Something went wrong while sourcing procedure $procedure"
}
# $1 module name
# $2 library name
load_lib ()
{
[ -z "$1" ] && die_error "load_library needs a module als \$1 and library as \$2"
[ -z "$2" ] && die_error "load_library needs a library as \$2"
log "Loading library $1/libs/$2 ..."
lib=/home/arch/fifa/user/"$1"/libs/"$2"
[ "$1" = core ] && lib=/home/arch/fifa/core/libs/"$2"
source $lib || die_error "Something went wrong while sourcing library $lib"
}
execute ()
{
[ -z "$1" -o -z "$2" ] && die_error "Use the execute function like this: execute <type> <name> with type=phase/worker"
[ "$1" != phase -a "$1" != worker ] && die_error "execute's first argument must be a valid type (phase/worker)"
PWD_BACKUP=`pwd`
object=$1_$2
if [ "$1" = worker ]
then
log "*** Executing worker $2"
if type -t $object | grep -q function
then
shift 2
$object "$@"
ret=$?
exit_var=exit_$object
read $exit_var <<< $ret # maintain exit status of each worker
else
die_error "$object is not defined!"
fi
elif [ "$1" = phase ]
then
log "******* Executing phase $2"
exit_var=exit_$object
read $exit_var <<< 0
debug "\$1: $1, \$2: $2, \$object: $object, \$exit_$object: $exit_var"
debug "declare: `declare | grep -e "^${object}=" | cut -d"=" -f 2-`"
# props to jedinerd at #bash for this hack.
eval phase=$(declare | grep -e "^${object}=" | cut -d"=" -f 2-)
# worker_str contains the name of the worker and optionally any arguments
for worker_str in "${phase[@]}"
do
execute worker $worker_str || read $exit_var <<< $? # assign last failing exit code to exit_phase_<phasename>, if any.
done
ret=${!exit_var}
fi
cd $PWD_BACKUP
return $ret
}
depend_module ()
{
load_module "$1"
}
depend_procedure ()
{
load_procedure "$1" "$2"
}
start_process ()
{
execute phase preparation
execute phase basics
execute phase system
execute phase finish
}
show_report () #TODO: abstract UI method (cli/dia)
{
echo "Execution Report:"
echo "-----------------"
for phase in preparation basics system finish
do
object=phase_$phase
exit_var=exit_$object
ret=${!exit_var}
echo -n "Phase $phase: "
[ "$ret" = "0" ] && echo "Success" || echo "Failed"
eval phase_array=$(declare | grep -e "^${object}=" | cut -d"=" -f 2-)
for worker_str in "${phase_array[@]}"
do
worker=${worker_str%% *}
exit_var=exit_worker_$worker
ret=${!exit_var}
echo -n " > Worker $worker: "
[ "$ret" = "0" ] && echo "Success" || echo "Failed"
done
done
}
# use this function to stop the installation procedure.
# $1 exit code (optional)
stop_installer ()
{
log "-------------- STOPPING INSTALLATION ----------"
exit $1
}
###### perform actual logic ######
echo "Welcome to $TITLE"
log "################## START OF INSTALLATION ##################"
[ -z "$1" ] && usage && exit 1
mount -o remount,rw / &>/dev/null
# note that we allow procedures like http://foo/bar. module -> http:, procedure -> http://foo/bar.
if [[ $1 =~ ^http:// ]]
then
module=http
procedure="$1"
elif grep -q '\/' <<< "$1"
then
#user specified module/procedure
module=`dirname "$1"`
procedure=`basename "$1"`
else
module=core
procedure="$1"
fi
load_module core
[ "$module" != core -a "$module" != http ] && load_module "$module"
load_procedure "$module" "$procedure"
# Set pacman vars. allow procedures to have set $var_TARGET_DIR (TODO: look up how delayed variable substitution works. then we can put this at the top again)
# flags like --noconfirm should not be specified here. it's up to the procedure to decide the interactivity
PACMAN=pacman
PACMAN_TARGET="pacman --root $var_TARGET_DIR --config /tmp/pacman.conf"
start_process
exit 0
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