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280 lines
6.7 KiB
Bash
280 lines
6.7 KiB
Bash
#!/bin/bash
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shopt -s extglob
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array_build() {
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local dest=$1 src=$2 i keys values
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# it's an error to try to copy a value which doesn't exist.
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declare -p "$2" &>/dev/null || return 1
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# Build an array of the indicies of the source array.
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eval "keys=(\"\${!$2[@]}\")"
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# Clear the destination array
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eval "$dest=()"
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# Read values indirectly via their index. This approach gives us support
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# for associative arrays, sparse arrays, and empty strings as elements.
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for i in "${keys[@]}"; do
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values+=("printf -v '$dest[$i]' %s \"\${$src[$i]}\";")
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done
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eval "${values[*]}"
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}
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funcgrep() {
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{ declare -f "$1" || declare -f package; } 2>/dev/null | grep -E "$2"
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}
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# extract_global_var function compatible with bash 4.2
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extract_global_var() {
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# $1: variable name
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# $2: multivalued
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# $3: name of output var
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local attr=$1 isarray=$2 outputvar=$3 ref
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if (( isarray )); then
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array_build ref "$attr"
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[[ ${ref[@]} ]] && array_build "$outputvar" "$attr"
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else
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[[ ${!attr} ]] && printf -v "$outputvar" %s "${!attr}"
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fi
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}
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# extract global_var function compatible with bash 4.3+
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old_extract_global_var() {
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# $1: variable name
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# $2: multivalued
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# $3: name of output var
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local attr=$1 isarray=$2 outputvar=$3
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if (( isarray )); then
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declare -n ref=$attr
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# Still need to use array_build here because we can't handle the scoping
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# semantics that would be included with the use of 'declare -n'.
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[[ ${ref[@]} ]] && array_build "$outputvar" "$attr"
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else
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[[ ${!attr} ]] && printf -v "$outputvar" %s "${!attr}"
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fi
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}
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extract_function_var() {
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# $1: function name
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# $2: variable name
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# $3: multivalued
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# $4: name of output var
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local funcname=$1 attr=$2 isarray=$3 outputvar=$4 attr_regex= decl= r=1
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if (( isarray )); then
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printf -v attr_regex '^[[:space:]]* %s\+?=\(' "$2"
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else
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printf -v attr_regex '^[[:space:]]* %s\+?=[^(]' "$2"
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fi
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while read -r; do
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# strip leading whitespace and any usage of declare
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decl=${REPLY##*([[:space:]])}
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eval "${decl/#$attr/$outputvar}"
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# entering this loop at all means we found a match, so notify the caller.
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r=0
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done < <(funcgrep "$funcname" "$attr_regex")
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return $r
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}
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pkgbuild_get_attribute() {
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# $1: package name
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# $2: attribute name
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# $3: multivalued
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# $4: name of output var
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local pkgname=$1 attrname=$2 isarray=$3 outputvar=$4
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printf -v "$outputvar" %s ''
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if [[ $pkgname ]]; then
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extract_global_var "$attrname" "$isarray" "$outputvar"
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extract_function_var "package_$pkgname" "$attrname" "$isarray" "$outputvar"
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else
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extract_global_var "$attrname" "$isarray" "$outputvar"
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fi
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}
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srcinfo_open_section() {
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printf '%s = %s\n' "$1" "$2"
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}
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srcinfo_close_section() {
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echo
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}
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srcinfo_write_attr() {
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# $1: attr name
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# $2: attr values
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local attrname=$1 attrvalues=("${@:2}")
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# normalize whitespace, strip leading and trailing
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attrvalues=("${attrvalues[@]//+([[:space:]])/ }")
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attrvalues=("${attrvalues[@]#[[:space:]]}")
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attrvalues=("${attrvalues[@]%[[:space:]]}")
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printf "\t$attrname = %s\n" "${attrvalues[@]}"
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}
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pkgbuild_extract_to_srcinfo() {
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# $1: pkgname
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# $2: attr name
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# $3: multivalued
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local pkgname=$1 attrname=$2 isarray=$3 outvalue=
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if pkgbuild_get_attribute "$pkgname" "$attrname" "$isarray" 'outvalue'; then
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srcinfo_write_attr "$attrname" "${outvalue[@]}"
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fi
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}
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srcinfo_write_section_details() {
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local attr package_arch a
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local multivalued_arch_attrs=(source provides conflicts depends replaces
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optdepends makedepends checkdepends
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{md5,sha{1,224,256,384,512}}sums)
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for attr in "${singlevalued[@]}"; do
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pkgbuild_extract_to_srcinfo "$1" "$attr" 0
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done
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for attr in "${multivalued[@]}"; do
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pkgbuild_extract_to_srcinfo "$1" "$attr" 1
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done
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pkgbuild_get_attribute "$1" 'arch' 1 'package_arch'
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for a in "${package_arch[@]}"; do
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# 'any' is special. there's no support for, e.g. depends_any.
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[[ $a = any ]] && continue
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for attr in "${multivalued_arch_attrs[@]}"; do
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pkgbuild_extract_to_srcinfo "$1" "${attr}_$a" 1
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done
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done
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}
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srcinfo_write_global() {
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local singlevalued=(pkgdesc pkgver pkgrel epoch url install changelog)
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local multivalued=(arch groups license checkdepends makedepends
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depends optdepends provides conflicts replaces
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noextract options backup
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source {md5,sha{1,224,256,384,512}}sums)
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srcinfo_open_section 'pkgbase' "${pkgbase:-$pkgname}"
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srcinfo_write_section_details ''
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srcinfo_close_section
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}
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srcinfo_write_package() {
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local singlevalued=(pkgdesc url install changelog)
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local multivalued=(arch groups license checkdepends depends optdepends
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provides conflicts replaces options backup)
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srcinfo_open_section 'pkgname' "$1"
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srcinfo_write_section_details "$1"
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srcinfo_close_section
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}
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srcinfo_write() {
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local pkg
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srcinfo_write_global
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for pkg in "${pkgname[@]}"; do
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srcinfo_write_package "$pkg"
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done
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}
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clear_environment() {
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local environ
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mapfile -t environ < <(compgen -A variable |
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grep -xvF "$(printf '%s\n' "$@")")
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# expect that some variables marked read only will complain here
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unset -v "${environ[@]}" 2>/dev/null
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}
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srcinfo_write_from_pkgbuild() {(
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clear_environment PATH
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shopt -u extglob
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. "$1" || exit 1
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shopt -s extglob
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srcinfo_write
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)}
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usage() {
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printf '%s\n' \
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'mksrcinfo v8' \
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'' \
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'mksrcinfo reads the target PKGBUILD and writes an equivalent .SRCINFO.' \
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'Without passing any arguments, mksrcinfo will read from $PWD/PKGBUILD' \
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'and write to $PWD/.SRCINFO.' \
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'' \
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'Usage: mksrcinfo [/path/to/pkgbuild]' \
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' -h display this help message and exit' \
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' -o <file> write output to <file>'
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}
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error() {
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printf "==> ERROR: $1\n" "${@:2}" >&2
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}
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die() {
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error "$@"
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exit 1
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}
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write_srcinfo_header() {
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local timefmt='%a %b %e %H:%M:%S %Z %Y'
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# fiddle with the environment to ensure we get the a consistent language and
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# timezone.
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TZ=UTC LC_TIME=C \
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printf "# Generated by mksrcinfo %s\n# %($timefmt)T\n" 'v8' -1
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}
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srcinfo_dest=$PWD/.SRCINFO
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while getopts ':o:h' flag; do
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case $flag in
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o)
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srcinfo_dest=$OPTARG
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;;
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:)
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die "option '-%s' requires an argument" "$OPTARG"
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;;
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h)
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usage
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exit 0
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;;
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\?)
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die "invalid option -- '-%s' (use -h for help)" "$OPTARG"
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;;
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esac
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done
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shift $(( OPTIND - 1 ))
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[[ -f PKGBUILD ]] || die 'PKGBUILD not found in current directory'
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# TODO: replace this with 'makepkg --printsrcinfo' once makepkg>=4.3 is released.
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{
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write_srcinfo_header
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srcinfo_write_from_pkgbuild "${1:-$PWD/PKGBUILD}"
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} >"$srcinfo_dest"
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# vim: set et ts=2 sw=2:
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