shellfu/include/yummy.sh

#!/bin/bash

ffoo import core


guess_pkgnames() {
    #
    # Guess interesting names from a folder of RPMs
    #
    ls "$1" \
      | grep rpm\$ \
      | sed -e 's/-[0-9].*$//' \
      | sort \
      | uniq
}


guess_rtag() {
    #
    # Guess release tag from uname
    #
    uname -r | sed -e 's/^[.0-9-]*//; s/\..*$//'
}


guess_rtag_word() {
    #
    # Guess "word" part of release tag from uname
    #
    # Use guess_rtag and parse out the "word" part,
    # e.g. el from el6 or fc from fc18
    #
    echo $(guess_rtag) | sed -e 's/[0-9]*$//'
}


guess_rtag_num() {
    #
    # Guess "numeric" part of release tag from uname
    #
    # Use guess_rtag and parse out the "numeric" part,
    # e.g. 6 from el6 or 18 from fc18
    #
    echo $(guess_rtag) | sed -e 's/^[a-z]*//'
}


installed_versions() {
    #
    # For every prefix, print installed versions
    #
    cat - \
        | while read name;
          do rpm -qa "$name*";
          done \
            | sort \
            | uniq
}


nvc_parse() {
    #
    # Parse NVC and print element they asked for
    #
    local what="$1"
    local nvc="$2"
    test -n "$nvc" || what=USAGE    # just provoke the * case
    local arch="${nvc##*.}"
    local rest="${nvc%%.$arch}"
    local release="${rest##*-}"
    local rest="${rest%%-$release}"
    local version="${rest##*-}"
    local name="${rest%-*}"
    case $what in
        arch)
            echo $arch
            ;;
        release)
            echo $release
            ;;
        version)
            echo $version
            ;;
        name)
            echo $name
            ;;
        *)
            usage_is "arch|release|version|name NVC"
            return 1
    esac
}


save_repo_for() {
    #
    # Fetch a repo for given target/release
    #
    # Find out release, take target and from repo_uris.ini,
    # choose correct repo URI, finally saving the repo file
    # to /etc/yum.repos.d
    #
    local target=$1
    local rtag_word=$(guess_rtag_word)
    local uri=$(iniread -s $rtag_word -k $target repo_uris.ini)
    think "adding repo for $target"
    debug -v target rtag_word uri
    case "$uri" in
        INCLUDED)
            ;;
        NONE)
            warn "no repo available for $target"
            return 1
            ;;
        *)
            pushd /etc/yum.repos.d/ >/dev/null
            wget -q "$uri"
            popd >/dev/null
            ;;
    esac
}


yum_preerase() {
    #
    # Read package names from stdin and pre-erase them
    #
    local pkg
    for pkg in "$@";
    do
        if rpm -q "$pkg" &> /dev/null;
        then
            think "pre-erasing $pkg"
            yum -q -y erase "$pkg"
        fi
    done
}


yum_install() {
    #
    # Mindlessly and silently install anything
    #
    yum -q -y install "$@" 2>&1 | mute_known yum
}


yum_install_if_needed() {
    #
    # yum_install unless it's already installed
    #
    local pkgs="$(select_args word $@)"
    local opts="$(select_args opt $@)"
    local pkg
    debug -v pkgs opts
    for pkg in $pkgs;
    do
        rpm -q $pkg >& /dev/null || yum_install $opts $pkg;
    done
}


yum_update() {
    #
    # Mindlessly and silently update anything
    #
    yum -q -y update "$@" 2>&1 | mute_known yum
}