testversion

#!/usr/bin/env bash

# Change to the script directory
cd "${0%/*}"

# SCRIPT VARIABLES
currdir="$PWD"
script_name=$(grep -o -e "[^\/]*$" <<< "$0")
archversion_check="check"
replace_values=0

# CONFIG VARIABLES
config='pkgupdates.conf'
[[ ! -f "$config" ]] && {
    printf '%s\n' 'Error: the config file is missing, run ./pkgupdates -c to generate a new one' >&2
    exit 1
}
source "$config"

GITREPO_URL=${GITREPO_URL:='https://github.com/ArchStrike/ArchStrike.git'}

archversion_config_test="$(sed -re 's|([^/]*$)|test\.\1|g' <<< "$ARCHVERSION_CONF")"
pkg_cache="$currdir/.archversion.cache"

# Colourscheme
[[ -t 1 ]] && {
    c_d=$'\e[1;30m' # DARK GREY
    c_r=$'\e[1;31m' # RED
    c_g=$'\e[1;32m' # GREEN
    c_y=$'\e[1;33m' # YELLOW
    c_b=$'\e[1;34m' # BLUE
    c_m=$'\e[1;35m' # VIOLET
    c_t=$'\e[1;36m' # TEAL
    c_w=$'\e[1;37m' # WHITE
    c_c=$'\e[0m'    # DISABLES COLOUR
}

function help {
    printf '\n%s\n' 'DESCRIPTION:'
    printf '%s\n\n' '  $script_name - use archversion.conf to create and run test configs'
    printf '%s\n' 'USAGE:'
    printf '%s\n\n' "  $script_name [FLAGS] [COMMAND]"
    printf '%s\n' 'FLAGS:'
    printf '%s\n' "  -d      ${c_d}|$c_c run archversion with debugging enabled"
    printf '%s\n' "  -r      ${c_d}|$c_c replace current values with ones generated by $script_name"
    printf '%s\n\n' "  -u      ${c_d}|$c_c update the package repo before running the command"
    printf '%s\n' "COMMANDS:"
    printf '%s\n' "  n|next  ${c_d}|$c_c load the next commented package into the test config"
    printf '%s\n' "  l|list  ${c_d}|$c_c generate a test config using a list of packages"
    printf '%s\n' "  c|check ${c_d}|$c_c check the loaded package in the text config"
    printf '%s\n\n' "  h|help  ${c_d}|$c_c show this help"
    exit "$1"
}

function pkgname_sanitize {
    tmp_name=${1#ruby1\.[8-9]-}
    tmp_name=${tmp_name#python[2-3]-}
    tmp_name=${tmp_name#python-}
    tmp_name=${tmp_name%-cvs}
    tmp_name=${tmp_name%-svn}
    tmp_name=${tmp_name%-hg}
    tmp_name=${tmp_name%-darcs}
    tmp_name=${tmp_name%-bzr}
    tmp_name=${tmp_name%-git}
    printf '%s' "${tmp_name/-git}"
}

function repo_init {
    # Setup/Update Repo
    printf '%s\n\n' "Updating repo @ $REPODIR..."

    if [[ -d "$REPODIR" ]]; then
        pushd "$REPODIR" > /dev/null 2>&1
        git reset --hard >/dev/null 2>&1
        git pull >/dev/null 2>&1
    else
        git clone "$GITREPO_URL" "$REPODIR" >/dev/null 2>&1
        pushd "$REPODIR" > /dev/null 2>&1
        git checkout updates >/dev/null 2>&1
    fi

    popd > /dev/null 2>&1
}

function config_init {
    # write (or write over) the config file with a template for everything above packages
    sed 's|^\s*#\s*||;/\[\s*DEFAULT\s*\]/,$!d;/^$/q' "$ARCHVERSION_CONF" \
        > "$archversion_config_test"
}

function pkg_generate {
    # reset any variables we're going to use and set the package name
    unset pkgbuild pkgdef regex pkgname _pkgname url _url
    pkg="$1"

    # configure the location of the PKGBUILD after checking that there is one
    [[ ! -f "$REPODIR/packages/$pkg/PKGBUILD" ]] && {
        printf '%s\n' "Error: no PKGBUILD for $pkg exists in $REPODIR/packages" >&2
        exit 1
    }
    pkgbuild="$REPODIR/packages/$pkg/PKGBUILD"

    # create an initial $pkgdef, using the archversion.conf entry one exists
    if egrep -q "\[\s*$pkg\s*\]" "$ARCHVERSION_CONF"; then
        pkgdef=$(sed 's|^\s*#\s*||;/\[\s*'"$pkg"'\s*\]/,$!d;/^$/q' "$ARCHVERSION_CONF")
    else
        pkgdef="[$pkg]"
    fi

    # remove values after the title if $replace_values is set to 1
    [[ "$replace_values" = 1 ]] \
        && pkgdef=$(head -n 1 <<< "$pkgdef")

    # source the information we want from the PKGBUILD
    eval "$(egrep '^_pkgname\s*=|^pkgname\s*=|^url\s*=' "$pkgbuild" | egrep -v '^\s*#')"

    # if this is a python package, use pipy as the upstream url if the page exists
    if egrep -q '^python[2-3]|^python-' <<< "$pkg"; then
        _url='https://pypi.python.org/pypi/'"$(pkgname_sanitize "$pkg")"
        [[ ! $(curl --write-out %{http_code} --silent --output /dev/null "$_url") = 404 ]] \
            && url=$_url
        unset _url
    fi

    # add a url after the package name if one doesn't exist
    egrep -q '^\s*url\s*=' <<< "$pkgdef" \
        || pkgdef=$(sed -re 's|^(\s*\[.*\]\s*)$|\1\nurl = '"$url"'|' <<< "$pkgdef")

    # add a regex after if one doesn't exist
    if egrep -q '^\s*regex\s*=' <<< "$pkgdef"; then
        regex=$(egrep '^\s*regex\s*=\s*' <<< "$pkgdef" | sed 's|^.*= *||')
    elif ! egrep -q "^\s*\[\s*$pkg\s*\]" "$ARCHVERSION_CONF"; then
        regex="$(pkgname_sanitize "$pkg")"'-([0-9][0-9]*\\\.[0-9][0-9]*)'
        pkgdef=$(sed -re 's|^(\s*url\s*=.*)$|\1\nregex = '"$regex"'|' <<< "$pkgdef")
    fi

    # add the definition to the package
    printf '%s\n\n' "$pkgdef" >> "$archversion_config_test"

    # display the starting values
    printf '%s\n\n' "$pkgdef"
}

function pkg_list {
    [[ -z "$1" ]] && {
        printf '%s\n' 'Error: you must supply at least one package to use' >&2
        exit 1
    }
    config_init

    # extract each package, uncomment if necessary, then add to the config
    for pkg in "$@"; do
        pkg_generate "$pkg"
    done

    printf '%s\n' "Created: $archversion_config_test"
    printf '%s\n\n' "Running: archversion $archversion_check..."
    pkg_check
}

function pkg_next {
    config_init

    # find the first commented package
    pkg=$(grep -v '[DEFAULT]' "$ARCHVERSION_CONF" \
        | sed '/^\ *#\ *\[/,$!d;/^$/q;s|^\ *#\ *||' \
        | grep -e '^\s*\[[^]]*\]' \
        | grep -o -e '[^][]*')
    pkg_generate "$pkg"
    printf '%s\n' "Created: $archversion_config_test"
    printf '%s\n\n' "Running: archversion $archversion_check..."
    pkg_check
}

function pkg_check {
    # Create the cache file if it's missing
    [[ ! -f "$pkg_cache" ]] \
        && printf '%s\n' '{"downstream": {}, "compare": {}}' > "$pkg_cache"

    CONFIG_PACKAGES="$archversion_config_test" \
    CACHE_PACKAGES="$pkg_cache" \
        archversion $archversion_check
}

function handle_args {
    # Otherwise, do what he user asks for
    case "$1" in
        n|next)
            pkg_next
            ;;
        l|list)
            shift
            pkg_list "$@"
            ;;
        c|check)
            printf '%s\n' "Running archversion check for $archversion_config_test"
            pkg_check
            ;;
        h|help)
            help 0
            ;;
        -d)
            archversion_check="--debug $archversion_check"
            shift; handle_args "$@"
            ;;
        -r)
            replace_values="1"
            shift; handle_args "$@"
            ;;
        -u)
            repo_init
            shift; handle_args "$@"
            ;;
        *)
            printf '%s\n' "Invalid command: $1"
            help 1
            ;;
    esac
}

# if the user enters nothing, show the help
[[ -z "$1" ]] \
    && help 0

handle_args "$@"