##################################################################
#(in case it is of use to anyone) for my own use i cooked up a way
#to easily invoke yum or smart, with any of several repo sets,
#for CentOS or fedora, keeping all repo defs in a single repo file.
#limitation:  smart doesn't use mirrorlists
#(by all means let me know if a better way exists):
#
#examples:
#   yu -y update                    #yum update using dist repos only
#   yud -y install smart            #use yum to install smart from dag repo
#   sma                             #smart shell with all extra repos
#      update                          #don't confuse smart update with yum update
#      query --show-channels alsa-dr*  #nice feature smart has that yum doesn't
#
#warning:  when exiting smart and it saves its cache, it gobbles lots of memory esp with many repos; running "sma" (below, all fedora repos) it thrashed for hours trying to use 878mb virtual with "only" 471mb resident in my 512mb

#which dist am i running?
if [ -s /etc/redhat-release ];then
  redrel=$(</etc/redhat-release)
  redrel=${redrel%.*}
  redrel=${redrel% (*}
  if [ "${redrel::1}" = F ];then
     redrel=f${redrel:$((-1))}         #fedora
  else
     redrel=e${redrel:$((-1))}         #centos
  fi
fi

#define commands to match distro
if [ "$redrel" = e3 ]||[ "$redrel" = e4 ];then
  alias  yu=ye         #centos
  alias  sm=se
  alias yup=yep
  alias smp=sep
  alias yud=yepd
  alias smd=sepd
  alias yua=yea
  alias sma=sea
else
  alias  yu=yf         #fedora
  alias  sm=sf
  alias yup=yfp
  alias smp=sfp
  alias yud=yfpd
  alias smd=sfpd
  alias yua=yfa
  alias sma=sfa
fi

#define commands to use various repo sets
alias ye='  yumr           ${yeb[@]}'   #yum w/centos main repos
alias se='  chan           ${yeb[@]}'      #ditto smart
alias yf='  yumr           ${yfb[@]}'      #ditto fedora
alias sf='  chan           ${yfb[@]}'
alias yep=' ye   ${yep[@]} ${ygp[@]}'   #plus some more repos
alias sep=' se   ${yep[@]} ${ygp[@]}'
alias yfp=' yf   ${yfp[@]} ${ygp[@]}'
alias sfp=' sf   ${yfp[@]} ${ygp[@]}'
alias yepd='yep  ${yed[@]} ${ygd[@]}'   #plus dag et al
alias sepd='sep  ${yed[@]} ${ygd[@]}'
alias yfpd='yfp  ${yfd[@]} ${ygd[@]}'
alias sfpd='sfp  ${yfd[@]} ${ygd[@]}'
alias yea=' yepd ${yea[@]} ${yga[@]}'   #all repos for this dist
alias sea=' sepd ${yea[@]} ${yga[@]}'
alias yfa=' yfpd ${yfa[@]} ${yga[@]}'
alias sfa=' sfpd ${yfa[@]} ${yga[@]}'
alias yaa=' yea  ${yfa[@]} ${yfb[@]}'   #plus repos for the other dist
alias saa=' sea  ${yfa[@]} ${yfb[@]}'

#for yum just give --enablerepo for desired repos
function yumr(){ LC_ALL=C yum "${@/\//--enablerepo=}";}
#for smart build channelfile with disabled=yes or no, also resolve $releasever and $basearch and add type=rpm-md
function chan(){ awk   'BEGIN{print"#WARNING, AUTOMATICALLY reGENERATED"}
			/^\[/{p=2;dis="yes"}
		    /^.main]/{p=0}
 '$(echo "$@ "|sed -e s.\ .]/{dis='"no"'}.g)'
			     {sub(".releasever","'${redrel:1}'")}
			     {sub(".basearch","'${unami=$(uname -i)}'")}
			    p{print}
			 p==2{print"disabled="dis"\ntype=rpm-md";p=1}' /etc/yum.repos.d/g.repo >| /etc/smart/channels/yumconf.channel &&
             yes|smart config --set remove-packages=false &&
        LC_ALL=C smart --shell;}

#bash arrays define repo sets, / parsed by awk/sed above:
  #centos main repos
yeb=(
  /CentOS_base
  /CentOS_update
  /CentOS_addons
  /CentOS_extras
  /CentOS_contrib
  /gnucash-e
  /trixbox
)
  #plus jpackage
yep=(
  /CentOS_plus
  /trixboxbeta
  /jpackage16-e-free
)
  #plus dag & kderh
yed=(
  /dag-e
  /kderh-e-stable
)
  #the rest
yea=(
  /dries-e
  /kderh-e-testing
  /kderh-e-unstable
  /at-sci-release
  /at-sci-updates
  /at-e-base
  /at-e-good
  /at-e-stable
  /at-e-testing
  /at-e-bleeding
  /at-e-obsoleted
  /at-e-release
  /at-e-updates
  /at-e-other
  /jpackage16-e-nonfree
  /jpackage16-e-devel
)
  #disable temporarily
yey=(
)
  #disable indefinitely
yex=(
  /pyvault-e
  /wb_base
  /wb_updates-released
  /wb_Extras
  /wb_Debuginfo
  /Lineox_base
  /Lineox_update
)
  #fedora main repos
yfb=(
  /f-core
  /f-extras
  /f-updates
) 
  #plus jpackage
yfp=(
  /jpackage16-f-free
) 
  #plus at & kderh
yfd=(
  /kderh-f-stable
  /at-f-stable
) 
  #the rest
yfa=(
  /f-devel
  /f-extras-devel
  /f-updates-testing
  /dries-f
  /kderh-f-testing
  /kderh-f-unstable
  /at-f-base
  /at-f-good
  /at-f-other
  /at-f-testing
  /at-f-bleeding
  /at-f-obsoleted
  /freshrpms
  /freshr-core
  /jpackage16-f-nonfree
  /jpackage16-f-devel
) 
  #disable temporarily
yfy=(
  /f-core-source
  /f-core-debuginfo
  /f-extras-source
  /f-extras-debuginfo
  /f-updates-source
  /f-updates-debuginfo
  /f-devel-source
  /f-devel-debuginfo
  /f-extras-devel-source
  /f-extras-devel-debuginfo
  /f-updates-testing-source
  /f-updates-testing-debuginfo
)
  #disable indefinitely
yfx=(
  /dag-f
  /dag-f3
  /dag-f5
  /dries-f3
  /dries-f5
  /freshr-updates
  /newrpms
  /nrpms-production
  /nrpms-testing
  /nrpms-debug
  /nrpms-experimental
  /nrpms-graveyard
  /pyvault-f
)
  #"plus", either centos or fedora
ygp=(
  /jpackage16-g-free
  /jpackage16-g-nonfree
)
ygd=(
  /kderh-a-stable
)
yga=(
  /kderh-a-testing
  /kderh-a-unstable
  /jpackage16-g-devel
)
ygy=(
)
ygx=(
  /egroupware
)