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Diffstat (limited to 'scripts/semver')
| -rwxr-xr-x | scripts/semver | 446 |
1 files changed, 446 insertions, 0 deletions
diff --git a/scripts/semver b/scripts/semver new file mode 100755 index 0000000..a160425 --- /dev/null +++ b/scripts/semver @@ -0,0 +1,446 @@ +#!/usr/bin/env bash +# SPDX-License-Identifier: Apache-2.0 + +set -o errexit -o nounset -o pipefail + +NAT='0|[1-9][0-9]*' +ALPHANUM='[0-9]*[A-Za-z-][0-9A-Za-z-]*' +IDENT="$NAT|$ALPHANUM" +FIELD='[0-9A-Za-z-]+' + +SEMVER_REGEX="\ +^[vV]?\ +($NAT)\\.($NAT)\\.($NAT)\ +(\\-(${IDENT})(\\.(${IDENT}))*)?\ +(\\+${FIELD}(\\.${FIELD})*)?$" + +PROG=semver +PROG_VERSION="3.4.0" + +USAGE="\ +Usage: + $PROG bump major <version> + $PROG bump minor <version> + $PROG bump patch <version> + $PROG bump prerel|prerelease [<prerel>] <version> + $PROG bump build <build> <version> + $PROG bump release <version> + $PROG get major <version> + $PROG get minor <version> + $PROG get patch <version> + $PROG get prerel|prerelease <version> + $PROG get build <version> + $PROG get release <version> + $PROG compare <version> <other_version> + $PROG diff <version> <other_version> + $PROG validate <version> + $PROG --help + $PROG --version + +Arguments: + <version> A version must match the following regular expression: + \"${SEMVER_REGEX}\" + In English: + -- The version must match X.Y.Z[-PRERELEASE][+BUILD] + where X, Y and Z are non-negative integers. + -- PRERELEASE is a dot separated sequence of non-negative integers and/or + identifiers composed of alphanumeric characters and hyphens (with + at least one non-digit). Numeric identifiers must not have leading + zeros. A hyphen (\"-\") introduces this optional part. + -- BUILD is a dot separated sequence of identifiers composed of alphanumeric + characters and hyphens. A plus (\"+\") introduces this optional part. + + <other_version> See <version> definition. + + <prerel> A string as defined by PRERELEASE above. Or, it can be a PRERELEASE + prototype string followed by a dot. + + <build> A string as defined by BUILD above. + +Options: + -v, --version Print the version of this tool. + -h, --help Print this help message. + +Commands: + bump Bump by one of major, minor, patch; zeroing or removing + subsequent parts. \"bump prerel\" (or its synonym \"bump prerelease\") + sets the PRERELEASE part and removes any BUILD part. A trailing dot + in the <prerel> argument introduces an incrementing numeric field + which is added or bumped. If no <prerel> argument is provided, an + incrementing numeric field is introduced/bumped. \"bump build\" sets + the BUILD part. \"bump release\" removes any PRERELEASE or BUILD parts. + The bumped version is written to stdout. + + get Extract given part of <version>, where part is one of major, minor, + patch, prerel (alternatively: prerelease), build, or release. + + compare Compare <version> with <other_version>, output to stdout the + following values: -1 if <other_version> is newer, 0 if equal, 1 if + older. The BUILD part is not used in comparisons. + + diff Compare <version> with <other_version>, output to stdout the + difference between two versions by the release type (MAJOR, MINOR, + PATCH, PRERELEASE, BUILD). + + validate Validate if <version> follows the SEMVER pattern (see <version> + definition). Print 'valid' to stdout if the version is valid, otherwise + print 'invalid'. + +See also: + https://semver.org -- Semantic Versioning 2.0.0" + +function error { + echo -e "$1" >&2 + exit 1 +} + +function usage_help { + error "$USAGE" +} + +function usage_version { + echo -e "${PROG}: $PROG_VERSION" + exit 0 +} + +# normalize the "part" keywords to a canonical string. At present, +# only "prerelease" is normalized to "prerel". + +function normalize_part { + if [ "$1" == "prerelease" ] + then + echo "prerel" + else + echo "$1" + fi +} + +function validate_version { + local version=$1 + if [[ "$version" =~ $SEMVER_REGEX ]]; then + # if a second argument is passed, store the result in var named by $2 + if [ "$#" -eq "2" ]; then + local major=${BASH_REMATCH[1]} + local minor=${BASH_REMATCH[2]} + local patch=${BASH_REMATCH[3]} + local prere=${BASH_REMATCH[4]} + local build=${BASH_REMATCH[8]} + eval "$2=(\"$major\" \"$minor\" \"$patch\" \"$prere\" \"$build\")" + else + echo "$version" + fi + else + error "version $version does not match the semver scheme 'X.Y.Z(-PRERELEASE)(+BUILD)'. See help for more information." + fi +} + +function is_nat { + [[ "$1" =~ ^($NAT)$ ]] +} + +function is_null { + [ -z "$1" ] +} + +function order_nat { + [ "$1" -lt "$2" ] && { echo -1 ; return ; } + [ "$1" -gt "$2" ] && { echo 1 ; return ; } + echo 0 +} + +function order_string { + [[ $1 < $2 ]] && { echo -1 ; return ; } + [[ $1 > $2 ]] && { echo 1 ; return ; } + echo 0 +} + +# given two (named) arrays containing NAT and/or ALPHANUM fields, compare them +# one by one according to semver 2.0.0 spec. Return -1, 0, 1 if left array ($1) +# is less-than, equal, or greater-than the right array ($2). The longer array +# is considered greater-than the shorter if the shorter is a prefix of the longer. +# +function compare_fields { + local l="$1[@]" + local r="$2[@]" + local leftfield=( "${!l}" ) + local rightfield=( "${!r}" ) + local left + local right + + local i=$(( -1 )) + local order=$(( 0 )) + + while true + do + [ $order -ne 0 ] && { echo $order ; return ; } + + : $(( i++ )) + left="${leftfield[$i]}" + right="${rightfield[$i]}" + + is_null "$left" && is_null "$right" && { echo 0 ; return ; } + is_null "$left" && { echo -1 ; return ; } + is_null "$right" && { echo 1 ; return ; } + + is_nat "$left" && is_nat "$right" && { order=$(order_nat "$left" "$right") ; continue ; } + is_nat "$left" && { echo -1 ; return ; } + is_nat "$right" && { echo 1 ; return ; } + { order=$(order_string "$left" "$right") ; continue ; } + done +} + +# shellcheck disable=SC2206 # checked by "validate"; ok to expand prerel id's into array +function compare_version { + local order + validate_version "$1" V + validate_version "$2" V_ + + # compare major, minor, patch + + local left=( "${V[0]}" "${V[1]}" "${V[2]}" ) + local right=( "${V_[0]}" "${V_[1]}" "${V_[2]}" ) + + order=$(compare_fields left right) + [ "$order" -ne 0 ] && { echo "$order" ; return ; } + + # compare pre-release ids when M.m.p are equal + + local prerel="${V[3]:1}" + local prerel_="${V_[3]:1}" + local left=( ${prerel//./ } ) + local right=( ${prerel_//./ } ) + + # if left and right have no pre-release part, then left equals right + # if only one of left/right has pre-release part, that one is less than simple M.m.p + + [ -z "$prerel" ] && [ -z "$prerel_" ] && { echo 0 ; return ; } + [ -z "$prerel" ] && { echo 1 ; return ; } + [ -z "$prerel_" ] && { echo -1 ; return ; } + + # otherwise, compare the pre-release id's + + compare_fields left right +} + +# render_prerel -- return a prerel field with a trailing numeric string +# usage: render_prerel numeric [prefix-string] +# +function render_prerel { + if [ -z "$2" ] + then + echo "${1}" + else + echo "${2}${1}" + fi +} + +# extract_prerel -- extract prefix and trailing numeric portions of a pre-release part +# usage: extract_prerel prerel prerel_parts +# The prefix and trailing numeric parts are returned in "prerel_parts". +# +PREFIX_ALPHANUM='[.0-9A-Za-z-]*[.A-Za-z-]' +DIGITS='[0-9][0-9]*' +EXTRACT_REGEX="^(${PREFIX_ALPHANUM})*(${DIGITS})$" + +function extract_prerel { + local prefix; local numeric; + + if [[ "$1" =~ $EXTRACT_REGEX ]] + then # found prefix and trailing numeric parts + prefix="${BASH_REMATCH[1]}" + numeric="${BASH_REMATCH[2]}" + else # no numeric part + prefix="${1}" + numeric= + fi + + eval "$2=(\"$prefix\" \"$numeric\")" +} + +# bump_prerel -- return the new pre-release part based on previous pre-release part +# and prototype for bump +# usage: bump_prerel proto previous +# +function bump_prerel { + local proto; local prev_prefix; local prev_numeric; + + # case one: no trailing dot in prototype => simply replace previous with proto + if [[ ! ( "$1" =~ \.$ ) ]] + then + echo "$1" + return + fi + + proto="${1%.}" # discard trailing dot marker from prototype + + extract_prerel "${2#-}" prerel_parts # extract parts of previous pre-release +# shellcheck disable=SC2154 + prev_prefix="${prerel_parts[0]}" + prev_numeric="${prerel_parts[1]}" + + # case two: bump or append numeric to previous pre-release part + if [ "$proto" == "+" ] # dummy "+" indicates no prototype argument provided + then + if [ -n "$prev_numeric" ] + then + : $(( ++prev_numeric )) # previous pre-release is already numbered, bump it + render_prerel "$prev_numeric" "$prev_prefix" + else + render_prerel 1 "$prev_prefix" # append starting number + fi + return + fi + + # case three: set, bump, or append using prototype prefix + if [ "$prev_prefix" != "$proto" ] + then + render_prerel 1 "$proto" # proto not same pre-release; set and start at '1' + elif [ -n "$prev_numeric" ] + then + : $(( ++prev_numeric )) # pre-release is numbered; bump it + render_prerel "$prev_numeric" "$prev_prefix" + else + render_prerel 1 "$prev_prefix" # start pre-release at number '1' + fi +} + +function command_bump { + local new; local version; local sub_version; local command; + + command="$(normalize_part "$1")" + + case $# in + 2) case "$command" in + major|minor|patch|prerel|release) sub_version="+."; version=$2;; + *) usage_help;; + esac ;; + 3) case "$command" in + prerel|build) sub_version=$2 version=$3 ;; + *) usage_help;; + esac ;; + *) usage_help;; + esac + + validate_version "$version" parts + # shellcheck disable=SC2154 + local major="${parts[0]}" + local minor="${parts[1]}" + local patch="${parts[2]}" + local prere="${parts[3]}" + local build="${parts[4]}" + + case "$command" in + major) new="$((major + 1)).0.0";; + minor) new="${major}.$((minor + 1)).0";; + patch) new="${major}.${minor}.$((patch + 1))";; + release) new="${major}.${minor}.${patch}";; + prerel) new=$(validate_version "${major}.${minor}.${patch}-$(bump_prerel "$sub_version" "$prere")");; + build) new=$(validate_version "${major}.${minor}.${patch}${prere}+${sub_version}");; + *) usage_help ;; + esac + + echo "$new" + exit 0 +} + +function command_compare { + local v; local v_; + + case $# in + 2) v=$(validate_version "$1"); v_=$(validate_version "$2") ;; + *) usage_help ;; + esac + + set +u # need unset array element to evaluate to null + compare_version "$v" "$v_" + exit 0 +} + +function command_diff { + validate_version "$1" v1_parts + # shellcheck disable=SC2154 + local v1_major="${v1_parts[0]}" + local v1_minor="${v1_parts[1]}" + local v1_patch="${v1_parts[2]}" + local v1_prere="${v1_parts[3]}" + local v1_build="${v1_parts[4]}" + + validate_version "$2" v2_parts + # shellcheck disable=SC2154 + local v2_major="${v2_parts[0]}" + local v2_minor="${v2_parts[1]}" + local v2_patch="${v2_parts[2]}" + local v2_prere="${v2_parts[3]}" + local v2_build="${v2_parts[4]}" + + if [ "${v1_major}" != "${v2_major}" ]; then + echo "major" + elif [ "${v1_minor}" != "${v2_minor}" ]; then + echo "minor" + elif [ "${v1_patch}" != "${v2_patch}" ]; then + echo "patch" + elif [ "${v1_prere}" != "${v2_prere}" ]; then + echo "prerelease" + elif [ "${v1_build}" != "${v2_build}" ]; then + echo "build" + fi +} + +# shellcheck disable=SC2034 +function command_get { + local part version + + if [[ "$#" -ne "2" ]] || [[ -z "$1" ]] || [[ -z "$2" ]]; then + usage_help + exit 0 + fi + + part="$1" + version="$2" + + validate_version "$version" parts + local major="${parts[0]}" + local minor="${parts[1]}" + local patch="${parts[2]}" + local prerel="${parts[3]:1}" + local build="${parts[4]:1}" + local release="${major}.${minor}.${patch}" + + part="$(normalize_part "$part")" + + case "$part" in + major|minor|patch|release|prerel|build) echo "${!part}" ;; + *) usage_help ;; + esac + + exit 0 +} + +function command_validate { + if [[ "$#" -ne "1" ]]; then + usage_help + fi + + if [[ "$1" =~ $SEMVER_REGEX ]]; then + echo "valid" + else + echo "invalid" + fi + + exit 0 +} + +case $# in + 0) echo "Unknown command: $*"; usage_help;; +esac + +case $1 in + --help|-h) echo -e "$USAGE"; exit 0;; + --version|-v) usage_version ;; + bump) shift; command_bump "$@";; + get) shift; command_get "$@";; + compare) shift; command_compare "$@";; + diff) shift; command_diff "$@";; + validate) shift; command_validate "$@";; + *) echo "Unknown arguments: $*"; usage_help;; +esac |