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https://github.com/termux/termux-packages
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a93aeedba0
The termux_pkg_is_update_needed() function (exposed in the command-line tool ./scripts/bin/apt-compare-versions) currently calls into python to use the pkg_resources.parse_version() function. This does not handle version numbers as apt/dpkg does - see https://www.debian.org/doc/debian-policy/ch-controlfields.html#version, so use dpkg --compare-versions for the version number comparison. For instance, correct apt/dpkg behaviour is: - '1-0' and '1' are the same version (the 'debian_revision' field) - '1~rc1' is considered an earlier version than '1' (useful for being able to use release candidates) - '1:1' is considered a later version than '2' (the epoch field, useful when upstream version numbering scheme changes). This also exits with an error if a version cannot be parsed, and fixes deprecation warnings when runing on later python versions (as pkg_resources.parse_version() is going to be removed).
62 lines
2.2 KiB
Bash
Executable File
62 lines
2.2 KiB
Bash
Executable File
#!/bin/bash
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termux_pkg_is_update_needed() {
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# USAGE: termux_pkg_is_update_needed <current-version> <latest-version>
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if [[ -z "$1" ]] || [[ -z "$2" ]]; then
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termux_error_exit "${BASH_SOURCE[0]}: at least 2 arguments expected"
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fi
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local CURRENT_VERSION="$1"
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local LATEST_VERSION="$2"
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# Compare versions.
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# shellcheck disable=SC2091
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dpkg --compare-versions "${CURRENT_VERSION}" lt "${LATEST_VERSION}"
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DPKG_EXIT_CODE=$?
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if [ "$DPKG_EXIT_CODE" = 0 ]; then
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return 0 # true. Update needed.
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elif [ "$DPKG_EXIT_CODE" = 1 ]; then
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return 1 # false. Update not needed.
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fi
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termux_error_exit "Bad 'dpkg --compare-versions' exit code: $DPKG_EXIT_CODE - bad version numbers?"
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}
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# Make it also usable as command line tool. `scripts/bin/apt-compare-versions` is symlinked to this file.
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if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
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declare -f termux_error_exit >/dev/null ||
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. "$(dirname "$(realpath "${BASH_SOURCE[0]}")")/termux_error_exit.sh" # realpath is used to resolve symlinks.
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if [[ "${1}" == "--help" ]]; then
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cat <<-EOF
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Usage: $(basename "${BASH_SOURCE[0]}") [--help] <first-version> <second-version>] [version-regex]
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--help - show this help message and exit
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<first-version> - first version to compare
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<second-version> - second version to compare
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[version-regex] - optional regular expression to filter version numbers from given versions
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EOF
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fi
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# Print in human readable format.
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first_version="$1"
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second_version="$2"
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version_regexp="${3:-}"
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if [[ -n "${version_regexp}" ]]; then
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first_version="$(grep -oP "${version_regexp}" <<<"${first_version}")"
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second_version="$(grep -oP "${version_regexp}" <<<"${second_version}")"
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if [[ -z "${first_version}" ]] || [[ -z "${second_version}" ]]; then
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termux_error_exit "ERROR: Unable to parse version numbers using regexp '${version_regexp}'"
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fi
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fi
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if [[ "${first_version}" == "${second_version}" ]]; then
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echo "${first_version} = ${second_version}"
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else
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if termux_pkg_is_update_needed "${first_version}" "${second_version}"; then
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echo "${first_version} < ${second_version}"
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elif termux_pkg_is_update_needed "${second_version}" "${first_version}"; then
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echo "${first_version} > ${second_version}"
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else
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echo "${first_version} = ${second_version}"
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fi
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fi
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fi
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