create-links.sh

#!/bin/sh

# The script assumes $CWD=='$DOCROOT/pub' as basis for links.
# Prep the environment with:
#   $DOCROOT/pub/kickstart -> /var/satellite/rhn/kickstart
#   $DOCROOT/pub/channels -> /var/cache/rhn/repodata
#
# 'ks-' denotes kickstart (aka static) repository
#
# Example REPO file:
#
#[ks-rhel-x86_64-server-5.9]
#name=RHEL5.9 - Server (x86_64)
#baseurl=file:///var/satellite/rhn/kickstart/ks-rhel-x86_64-server-5-5.9/Server/
#   http://<satellite>/ks/dist/ks-rhel-x86_64-server-5-5.9/Server/
#   http://<satellite>/pub/kickstart/ks-rhel-x86_64-server-5-5.9/Server/
#enabled=0
#gpgkey=http://<satellite>/pub/RPM-GPG-KEY-redhat-release
#
#[rhel-x86_64-server-6]
#name=RHEL6.x - Server (x86_64)
#baseurl=file:///var/cache/rhn/repodata/rhel-x86_64-server-6/
#   http://<satellite>/pub/channels/rhel-x86_64-server-6/
#enabled=0
#gpgkey=http://<satellite>/pub/RPM-GPG-KEY-redhat-release



# where Satellite keeps imported RPMs
: ${SATDIR:=/var/satellite/redhat}

# must be fully-qualified path
: ${REPOFILE:=/var/www/html/pub/satellite.repo}

# 'getPackage' path is hardcoded into repo metadata like so:
# http://<satellite>/ks/dist/<channel>/.../getPackage/<rpm>
PKGDIR=getPackage

pkg_cache=/tmp/create-links.dat

if [ -f $pkg_cache ]; then
    test $pkg_cache -nt `ls -td /var/cache/rhn/reposync/* | head -1` || \
    rm $pkg_cache
else
    rm -f $pkg_cache 2>/dev/null
fi

# scan once to create list
echo "creating package cache ..."
test -s $pkg_cache || {
    t=`mktemp`
    trap "/bin/rm $t 2>/dev/null" INT KILL TERM EXIT
    find $SATDIR -type f > $t
    mv $t $pkg_cache
  }

declare -A repos
eval repos=(`awk '/^\[.*\]$/ { printf "%s=", $0; } /^baseurl=file:/ { sub(/.+:\/\//, "", $0); print $0; }' $REPOFILE`)

for ch in ${!repos[@]}; do
  chp=${repos[$ch]}

  echo "processing '$ch' ..."
  if [ "${chp:0:1}" != "/" ]; then
    echo "  ERROR: couldn't parse file-based 'baseurl'"
    continue
  fi
  if [ ! -d $chp -o ! -s $chp/repomd.xml ]; then
    echo "  ERROR: baseurl path '$chp' is not invalid"
    continue
  fi

  ( cd $chp
    [ -e .CREATE_SKIP -o -e .CREATE_DONE ] && continue

    if [ ! -d repodata ]; then
    echo "  INFO: creating missing 'repodata' directory"
    ln -s . repodata
    fi
    if [ ! -d $PKGDIR ]; then
    echo "  INFO: creating package target directory '$PKGDIR'"
    mkdir $PKGDIR
    fi

    for rpm in `repoquery -c $REPOFILE --tempcache --repoid=$ch \
            --qf='%{name}-%{version}-%{release}.%{arch}.rpm' \
            --all --show-dupes 2>/dev/null`; do

    link=`grep -m 1 "${rpm}$" $pkg_cache`
    if [ -z "$link" ]; then     # was 'reposync' run?
        echo "  ERROR: package '$rpm' not found in repository"
        continue
    fi

    if [ -e "$PKGDIR/$rpm" ]; then
        if [ ! -h "$PKGDIR/$rpm" ]; then
        # remove non-symlink (eg. dedup populated repository)
        echo "  WARN: removing non-symlink '$rpm'"
        rm -f $PKGDIR/$rpm
        elif ! stat -L $PKGDIR/$rpm &>/dev/null ; then
        echo "  WARN: removing broken symlink '$rpm'"
        rm -f $PKGDIR/$rpm
        fi
    fi

    if [ ! -e "$PKGDIR/$rpm" ]; then
        ln -s "$link" "$PKGDIR/$rpm" || \
        echo "  ERROR: create link to '$rpm' failed"
    fi
    done
    [ "ks-" = "${ch:0:3}" ] && touch .CREATE_DONE
  )
done