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#!/bin/bash
###### Set some default variables or get them from the setup script ######
TITLE="Arch Linux Installation Framework"
LOG="/dev/tty7"
LOGFILE=/home/arch/aif/runtime/aif.log
###### 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="aif -p <procedurename> Select a procedure
-i <dia/cli> Override interface type (optional)
-d Explicitly enable debugging (optional)
-l Explicitly enable logging to file (optional)
-h Help: show usage (optional)\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/aif/core/procedures -type f`\n
`find /home/arch/aif/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 ()
{
str="[LOG] `date +"%Y-%m-%d %H:%M:%S"` $@"
echo -e "$str"
echo -e "$str" > $LOG
echo -e "$str" >> $LOGFILE
}
debug ()
{
str="[DEBUG] $@"
if [ "$DEBUG" = "1" ]
then
echo -e "$str"
echo -e "$str" > $LOG
echo -e "$str" >> $LOGFILE
fi
}
###### Core functions ######
# $1 module name
load_module ()
{
[ -z "$1" ] && die_error "load_module needs a module argument"
log "Loading module $1 ..."
path=/home/arch/aif/user/"$1"
[ "$1" = core ] && path=/home/arch/aif/core
for submodule in lib #procedure don't load procedures automatically!
do
if [ ! -d "$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/aif/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/aif/user/"$1"/procedures/"$2"
[ "$1" = core ] && procedure=/home/arch/aif/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/aif/user/"$1"/libs/"$2"
[ "$1" = core ] && lib=/home/arch/aif/core/libs/"$2"
source $lib || die_error "Something went wrong while sourcing library $lib"
}
# $1 phase/worker
# $2 phase/worker name
# $3... extra args for phase/worker (optional)
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
# TODO: for some reason the hack below does not work (tested in virtualbox), even though it really should. Someday I must get indirect array variables working and clean this up...
# debug "\$1: $1, \$2: $2, \$object: $object, \$exit_$object: $exit_object"
# debug "declare: `declare | grep -e "^${object}=" | cut -d"=" -f 2-`"
# props to jedinerd at #bash for this hack.
# eval phase=$(declare | grep -e "^${object}=" | cut -d"=" -f 2-)
#debug "\$phase: $phase - ${phase[@]}"
unset phase
[ "$2" = preparation ] && phase=( "${phase_preparation[@]}" )
[ "$2" = basics ] && phase=( "${phase_basics[@]}" )
[ "$2" = system ] && phase=( "${phase_system[@]}" )
[ "$2" = finish ] && phase=( "${phase_finish[@]}" )
# worker_str contains the name of the worker and optionally any arguments
for worker_str in "${phase[@]}"
do
debug "Loop iteration. \$worker_str: $worker_str"
execute worker $worker_str || read $exit_var <<< $? # assign last failing exit code to exit_phase_<phasename>, if any.
done
ret=${!exit_var}
fi
debug "Execute(): $object exit state was $ret"
cd $PWD_BACKUP
return $ret
}
# check if a phase/worker executed sucessfully
# returns 0 if ok, the phase/workers' exit state otherwise (and returns 1 if not executed yet)
# $1 phase/worker
# $2 phase/worker name
ended_ok ()
{
[ -z "$1" -o -z "$2" ] && die_error "Use the ended_ok function like this: ended_ok <type> <name> with type=phase/worker"
[ "$1" != phase -a "$1" != worker ] && die_error "ended_ok's first argument must be a valid type (phase/worker)"
object=$1_$2
exit_var=exit_$object
debug "Ended_ok? -> Exit state of $object was: ${!exit_var} (if empty. it's not executed yet)"
[ "${!exit_var}" = '0' ] && return 0
[ "${!exit_var}" = '' ] && return 1
return ${!exit_var}
}
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
}
process_args ()
{
true
}
# 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
### Set configuration values ###
# note : you're free to use or ignore these in your procedure. probably you want to use these variables to override defaults in your configure worker
var_OPTS_STRING=":i:dlp:" # you can override this variable in your procedure.
while getopts $var_OPTS_STRING OPTION
do
case $OPTION in
i)
[ -z "$OPTARG" ] && usage && exit 1 #TODO: check if it's necessary to do this. the ':' in $var_OPTS_STRING might be enough
[ "$OPTARG" != cli -a "$OPTARG" = !dia ] && die_error "-i must be dia or cli"
arg_ui_type=$OPTARG
;;
d)
export DEBUG=1
;;
l)
LOG_TO_FILE=1 #TODO: implement using this variable
;;
p)
[ -z "$OPTARG" ] && usage && exit 1
# note that we allow procedures like http://foo/bar. module -> http:, procedure -> http://foo/bar.
if [[ $OPTARG =~ ^http:// ]]
then
module=http
procedure="$OPTARG"
elif grep -q '\/' <<< "$OPTARG"
then
#user specified module/procedure
module=`dirname "$OPTARG"`
procedure=`basename "$OPTARG"`
else
module=core
procedure="$OPTARG"
fi
;;
h)
usage
stop_installer
;;
?)
usage
stop_installer 5
;;
esac
process_args $OPTION $OPTARG # you can override this function in your profile to parse additional arguments and/or override the behavior above
done
[ -z "$procedure" ] && usage && stop_installer 5
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
stop_installer
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