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#!/bin/bash
usage ()
{
msg="aif -p <procedurename> Select a procedure # If given, this *must* be the first option
-i <dia/cli> Override interface type (optional)
-d Explicitly enable debugging (/var/log/aif/debug.log) (optional)
-l Explicitly enable logging to file (/var/log/aif/aif.log) (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>.\n
For more info, see the README which you can find in /usr/share/aif/docs\n
Available procedures:
==core==
`find $LIB_CORE/procedures -type f | sed \"s#$LIB_CORE/procedures/##\" | sort`
==user==
`find $LIB_USER/*/procedures -type f 2>/dev/null | sed \"s#$LIB_USER/\(.*\)/procedures/#\1/#\" | sort`"
[ -n "$procedure" ] && msg="$msg\nProcedure ($procedure) specific options:\n$var_ARGS_USAGE"
echo -e "$msg"
}
# $1 module name
load_module ()
{
[ -z "$1" ] && die_error "load_module needs a module argument"
log "Loading module $1 ..."
local path=$LIB_USER/"$1"
[ "$1" = core ] && path=$LIB_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/${submodule}s does not exist. something is horribly wrong with this installation"
else
shopt -s nullglob
local module
for module in "$path/${submodule}s"/*
do
# I have the habit of editing files while testing, don't source my backup files!
[[ "$module" == *~ ]] && continue
module=$(basename "$module")
load_${submodule} "$1" "$module"
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 $2 ..."
local procedure=$RUNTIME_DIR/aif-procedure-downloaded-`basename $2`
wget "$2" -q -O $procedure >/dev/null || die_error "Could not download procedure $2"
else
log "Loading procedure $1/procedures/$2 ..."
local procedure=$LIB_USER/"$1"/procedures/"$2"
[ "$1" = core ] && procedure=$LIB_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/$2 ..."
local lib=$LIB_USER/"$1"/libs/"$2"
[ "$1" = core ] && lib=$LIB_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" ] && debug 'MAIN' "execute $@" && die_error "Use the execute function like this: execute <type> <name> with type=phase/worker"
[ "$1" != phase -a "$1" != worker ] && debug 'MAIN' "execute $@" && 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
$object "$@"
local 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 'MAIN' "\$1: $1, \$2: $2, \$object: $object, \$exit_$object: $exit_object"
# debug 'MAIN' "declare: `declare | grep -e "^${object}=" | cut -d"=" -f 2-`"
# props to jedinerd at #bash for this hack.
# eval phase=$(declare | grep -e "^${object}=" | cut -d"=" -f 2-)
#debug 'MAIN' "\$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 'MAIN' "Loop iteration. \$worker_str: $worker_str"
execute worker $worker_str || read $exit_var <<< $? # assign last failing exit code to exit_phase_<phasename>, if any.
done
local ret=${!exit_var}
fi
debug 'MAIN' "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 'MAIN' "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_$object
local ret=${!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
}
start_installer ()
{
log "################## START OF INSTALLATION ##################"
}
# use this function to stop the installation procedure.
# $1 exit code (optional)
stop_installer ()
{
log "-------------- STOPPING INSTALLATION ----------"
cleanup_runtime
[ "$var_UI_TYPE" = dia ] && clear
exit $1
}
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