open changelog for a package

xchangelog

#! /bin/sh
# xchangelog [-q] PKG - open changelog for a package

if [ "$1" = "-q" ]; then
    QUIET=yes
    shift
fi

# tpl_get_var TEMPLATE VAR
tpl_get_var() {
    [ -r "$1" ] || return 1
    bash -c "
	vopt_enable(){ :; }
    vopt_if(){ :; }
	vopt_conflict(){ :; }
    vopt_with(){ :; }
    source '$1' && [ -n \"\$$2\" ] && echo \$$2"
}

changelog_from_template() {
    template="$(xdistdir)/srcpkgs/$1/template"
    tpl_get_var "$template" changelog
}

changelog_from_db() {
    xbps-query -p changelog "$1" ||
        xbps-query -Rp changelog "$1"
}

changelog_from_url() {
    case "$1" in
        http*://*) echo "$1" ;;
        *) return 1 ;;
    esac
}

changelog=$(
    changelog_from_template "$1" ||
        changelog_from_db "$1" ||
        changelog_from_url "$1"
    )

if [ -z "$changelog" ]; then
	echo "changelog not available, please set changelog= in template!"
	exit 1
fi

if [ -n "$QUIET" ]; then
    echo "$changelog"
    exit 0
fi

curl_github_releases() {
    curl -sL "https://api.github.com/repos/${changelog#*github.com/}" |
        jq -r '.[] | (
            "==================================================\n" +
            "tag: "  + .tag_name + "\n" +
            "--------------------------------------------------\n" +
            .body + "\n" )'
}

curl_changelog() {
    case "$changelog" in
        http*//github.com/*/releases)
            curl_github_releases
            ;;
        *)
            curl -sL "$changelog"
            ;;
    esac
}

curl_changelog | less -iF -+e