2022-03-26 08:19:11 +01:00
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#!/bin/bash
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#
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# NOTE: This function returns true even when CURRENT_VERSION = "1.0" and LATEST_VERSION = "1.0-1".
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# This is logically correct, but repology sometimes returns "1.0-1" as the latest version even
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# if "1.0" is latest. This happens when any of the repositories tracked by repology has specified
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# "1.0-1" as the latest.
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#
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# For example:
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# latest lua:lpeg version (as of 2021-11-20T12:21:31) is "1.0.2" but MacPorts specifies as "1.0.2-1".
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# Hence repology returns "1.0.2-1" as the latest.
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#
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# But hopefully, all this can be avoided if TERMUX_PKG_AUTO_UPDATE_TAG_REGEXP is set.
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#
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termux_pkg_is_update_needed() {
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if [[ "$#" -lt 2 ]] || [[ "$#" -gt 3 ]]; then
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termux_error_exit <<-EndOfUsage
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Usage: ${FUNCNAME[0]} <current-version> <latest-version> [version-regexp]
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Returns: 0 if update is needed, 1 if not.
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EndOfUsage
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fi
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local CURRENT_VERSION="$1"
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local LATEST_VERSION="$2"
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local VERSION_REGEX="${3:-}"
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# If needed, filter version numbers from tag by using regexp.
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if [[ -n "${VERSION_REGEX}" ]]; then
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LATEST_VERSION="$(grep -oP "${VERSION_REGEX}" <<<"${LATEST_VERSION}" || true)"
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2022-03-27 20:08:57 +02:00
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if [[ -z "${LATEST_VERSION}" ]]; then
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termux_error_exit <<-EndOfError
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ERROR: failed to check latest version. Ensure whether the version regex '${VERSION_REGEX}'
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works correctly with latest release tag.
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EndOfError
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fi
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2022-03-26 08:19:11 +01:00
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fi
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# Translate "_" into ".": some packages use underscores to seperate
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# version numbers, but we require them to be separated by dots.
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LATEST_VERSION="${LATEST_VERSION//_/.}"
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# Compare versions.
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# shellcheck disable=SC2091
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if $(
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cat <<-EOF | python3 -
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import sys
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from pkg_resources import parse_version
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if parse_version("${CURRENT_VERSION}") < parse_version("${LATEST_VERSION}"):
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sys.exit(0)
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else:
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sys.exit(1)
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EOF
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); then
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return 0 # true. Update needed.
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fi
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return 1 # false. Update not needed.
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}
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# Make script sourceable as well as executable.
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if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
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declare -f termux_error_exit >/dev/null || . "$(dirname "${BASH_SOURCE[0]}")/termux_error_exit.sh"
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termux_pkg_is_update_needed "$@"
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fi
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