#! /bin/sh own_dir="$(cd "$(dirname "$0")"; pwd)" CURRENT_URL= url () { CURRENT_URL="$1" } version_unpack () { sed -re ' s/[.]/ /g; s@/@ / @g s/-(rc|pre)/ -1 \1 /g; s/-(gamma)/ -2 \1 /g; s/-(beta)/ -3 \1 /g; s/-(alpha)/ -4 \1 /g; s/[-]/ - /g; ' } version_repack () { sed -re ' s/ - /-/g; s/ -[0-9]+ ([a-z]+) /-\1/g; s@ / @/@g s/ /./g; ' } version_sort () { version_unpack | sort -t ' ' -n $(for i in $(seq 30); do echo " -k${i}n" ; done) | tac | version_repack } position_choice () { head -n "${1:-1}" | tail -n "${2:-1}" } matching_links () { "$own_dir"/urls-from-page.sh "$CURRENT_URL" | grep -E "$1" } link () { CURRENT_URL="$(matching_links "$1" | position_choice "$2" "$3")" echo "Linked by: $*" echo "URL: $CURRENT_URL" >&2 } version_link () { CURRENT_URL="$(matching_links "$1" | version_sort | position_choice "$2" "$3")" echo "Linked version by: $*" echo "URL: $CURRENT_URL" >&2 } redirect () { CURRENT_URL="$(curl -I -L --max-redirs "${1:-99}" "$CURRENT_URL" | grep -E '^Location: ' | position_choice "${2:-999999}" "$3" | sed -e 's/^Location: //; s/\r//')" echo "Redirected: $*" echo "URL: $CURRENT_URL" >&2 } replace () { sed -re "s $1 $2 g" } process () { CURRENT_URL="$(echo "$CURRENT_URL" | replace "$1" "$2")" echo "Processed: $*" echo "URL: $CURRENT_URL" >&2 } version () { CURRENT_VERSION="$(echo "$CURRENT_URL" | replace "$1" "$2")" echo "Version: $CURRENT_VERSION" >&2 } ensure_version () { [ -z "$CURRENT_VERSION" ] && version '.*-([0-9.]+)[-._].*' '\1' } ensure_target () { [ -z "$CURRENT_TARGET" ] && target default.nix } hash () { CURRENT_HASH="$(nix-prefetch-url "$CURRENT_URL")" } name () { CURRENT_NAME="$1" } retrieve_version () { PACKAGED_VERSION="$(nix-instantiate --eval-only '' -A "$CURRENT_NAME".meta.version | xargs)" } directory_of () { cd "$(dirname "$1")"; pwd } full_path () { echo "$(directory_of "$1")/$(basename "$1")" } target () { CURRENT_TARGET="$1" test -e "$CURRENT_TARGET" || { [ "$CURRENT_TARGET" = "${CURRENT_TARGET#/}" ] && CURRENT_TARGET="$CONFIG_DIR/$CURRENT_TARGET"; } echo "Target set to: $CURRENT_TARGET" } marker () { BEGIN_EXPRESSION="$1" } update_found () { echo "Compare: $CURRENT_VERSION vs $PACKAGED_VERSION" [ "$CURRENT_VERSION" != "$PACKAGED_VERSION" ] } do_write_expression () { echo "${1}rec {" echo "${1} baseName=\"$CURRENT_NAME\";" echo "${1} version=\"$CURRENT_VERSION\";" echo "${1} name=\"$CURRENT_NAME-$CURRENT_VERSION\";" echo "${1} hash=\"$CURRENT_HASH\";" echo "${1} url=\"$CURRENT_URL\";" echo "${1} sha256=\"$CURRENT_HASH\";" echo "$2" } line_position () { file="$1" regexp="$2" count="${3:-1}" grep -E "$regexp" -m "$count" -B 999999 "$file" | wc -l } replace_once () { file="$1" regexp="$2" replacement="$3" instance="${4:-1}" position="$(line_position "$file" "$regexp" "$instance")" sed -re "${position}s $regexp $replacement " -i "$file" } set_var_value () { var="${1}" value="${2}" instance="${3:-1}" file="${4:-$CURRENT_TARGET}" no_quotes="${5:-0}" quote='"' let "$no_quotes" && quote="" replace_once "$file" "${var} *= *.*" "${var} = ${quote}${value}${quote};" } do_regenerate () { BEFORE="$(cat "$1" | grep -F "$BEGIN_EXPRESSION" -B 999999;)" AFTER_EXPANDED="$(cat "$1" | grep -F "$BEGIN_EXPRESSION" -A 999999 | grep -E '^ *[}] *; *$' -A 999999;)" AFTER="$(echo "$AFTER_EXPANDED" | tail -n +2)" CLOSE_BRACE="$(echo "$AFTER_EXPANDED" | head -n 1)" SPACING="$(echo "$CLOSE_BRACE" | sed -re 's/[^ ].*//')" echo "$BEFORE" do_write_expression "$SPACING" "$CLOSE_BRACE" echo "$AFTER" } do_overwrite () { hash do_regenerate "$1" > "$1.new.tmp" mv "$1.new.tmp" "$1" } process_config () { CONFIG_DIR="$(directory_of "$1")" source "$CONFIG_DIR/$(basename "$1")" BEGIN_EXPRESSION='# Generated upstream information'; retrieve_version ensure_version ensure_target update_found && do_overwrite "$CURRENT_TARGET" } source "$own_dir/update-walker-service-specific.sh" process_config "$1"