#!/bin/bash

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# dist.sh

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# Author: Tom "spot" Callaway <tcallawa@redhat.com>

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# License: GPL

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# This is a script to output the value for the %{dist}

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# tag. The dist tag takes the following format: .$type$num

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# Where $type is one of: el, fc, rh

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# (for RHEL, Fedora Core, and RHL, respectively)

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# And $num is the version number of the distribution.

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# NOTE: We can't detect Rawhide or Fedora Test builds properly.

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# If we successfully detect the version number, we output the

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# dist tag. Otherwise, we exit with no output.

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RELEASEFILE=/etc/redhat-release

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function check_num {

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MAINVER=`cut -d "(" -f 1 < $RELEASEFILE | \

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sed -e "s/[^0-9.]//g" -e "s/$//g" | cut -d "." -f 1`

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echo $MAINVER | grep -q '[0-9]' && echo $MAINVER

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}

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function check_rhl {

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grep -q "Red Hat Linux" $RELEASEFILE && ! grep -q "Advanced" $RELEASEFILE && echo $DISTNUM

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}

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function check_rhel {

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egrep -q "(Enterprise|Advanced|CloudLinux)" $RELEASEFILE && echo $DISTNUM

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}

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function check_fedora {

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grep -q Fedora $RELEASEFILE && echo $DISTNUM

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}

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DISTNUM=`check_num`

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DISTFC=`check_fedora`

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DISTRHL=`check_rhl`

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DISTRHEL=`check_rhel`

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if [ -n "$DISTNUM" ]; then

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if [ -n "$DISTFC" ]; then

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DISTTYPE=fc

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elif [ -n "$DISTRHEL" ]; then

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DISTTYPE=el

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elif [ -n "$DISTRHL" ]; then

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DISTTYPE=rhl

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fi

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fi

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[ -n "$DISTTYPE" -a -n "$DISTNUM" ] && DISTTAG=".${DISTTYPE}${DISTNUM}"

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case "$1" in

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--el) echo -n "$DISTRHEL" ;;

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--fc) echo -n "$DISTFC" ;;

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--rhl) echo -n "$DISTRHL" ;;

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--distnum) echo -n "$DISTNUM" ;;

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--disttype) echo -n "$DISTTYPE" ;;

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--help)

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printf "Usage: $0 [OPTIONS]\n"

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printf " Default mode is --dist. Possible options:\n"

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printf " --el\t\tfor RHEL version (if RHEL)\n"

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printf " --fc\t\tfor Fedora version (if Fedora)\n"

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printf " --rhl\t\tfor RHL version (if RHL)\n"

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printf " --dist\t\tfor distribution tag\n"

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printf " --distnum\tfor distribution number (major)\n"

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printf " --disttype\tfor distribution type\n" ;;

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*) echo -n "$DISTTAG" ;;

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esac

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