lib/aur-pkglist

   1 #!/bin/bash
   2 # aur-pkglist - print the AUR package list
   3 [[ -v AUR_DEBUG ]] && set -o xtrace
   4 argv0=pkglist
   5 XDG_CACHE_HOME=${XDG_CACHE_HOME:-$HOME/.cache}
   6 AUR_LOCATION=${AUR_LOCATION:-'https://aur.archlinux.org'}
   7 AUR_METADEST=${AUR_METADEST:-$XDG_CACHE_HOME/aurutils/$argv0}
   8 PS4='+(${BASH_SOURCE}:${LINENO}): ${FUNCNAME[0]:+${FUNCNAME[0]}(): }'
   9
  10 # default options
  11 ttl=300 pkglist=packages update=0 verify=0 use_system_time=0
  12
  13 args_csv() {
  14     # shellcheck disable=SC2155
  15     local str=$(printf '%s,' "$@")
  16     printf '%s' "${str%,}"
  17 }
  18
  19 http_last_modified() {
  20     awk -F', ' '/^[Ll]ast-[Mm]odified:/ {print $2}' "$1"
  21 }
  22
  23 list_fetch() {
  24     curl -A aurutils -f "$1" "${@:2}" --remote-name
  25 }
  26
  27 list_headers() {
  28     curl -A aurutils -f "$1" --head -Ss
  29 }
  30
  31 usage() {
  32     printf >&2 'usage: %s [-bqsiv] [-t ttl] [-FP pattern]\n' "$argv0"
  33     exit 1
  34 }
  35
  36 opt_short='t:bqsivFPu'
  37 opt_long=('pkgbase' 'search' 'info' 'fixed-strings' 'perl-regexp' 'plain'
  38           'ttl:' 'users' 'verify' 'quiet' 'systime')
  39 opt_hidden=('dump-options' 'time:')
  40
  41 if opts=$(getopt -o "$opt_short" -l "$(args_csv "${opt_long[@]}" "${opt_hidden[@]}")" -n "$argv0" -- "$@"); then
  42     eval set -- "$opts"
  43 else
  44     usage
  45 fi
  46
  47 unset mode
  48 while true; do
  49     case "$1" in
  50         -b|--pkgbase)
  51             pkglist=pkgbase ;;
  52         -s|--search)
  53             pkglist=packages-meta-v1.json ;;
  54         -i|--info)
  55             pkglist=packages-meta-ext-v1.json ;;
  56         --users)
  57             pkglist=users ;;
  58         -F|--fixed-strings)
  59             mode=fixed ;;
  60         -P|--perl-regexp)
  61             mode=regex ;;
  62         --plain)
  63             mode=plain ;;
  64         -q|--quiet)
  65             mode=none ;;
  66         -t|--time|--ttl)
  67             shift; ttl=$1 ;;
  68         -v|--verify)
  69             verify=1 ;;
  70         --systime)
  71             use_system_time=1 ;;
  72         # Deprecated options
  73         -u) printf >&2 'deprecation notice: %s -u is an alias for --quiet\n' "$argv0"
  74             mode=none ;;
  75         --dump-options)
  76             printf -- '--%s\n' "${opt_long[@]}" ${AUR_DEBUG+"${opt_hidden[@]}"}
  77             printf -- '%s' "${opt_short}" | sed 's/.:\?/-&\n/g'
  78             exit ;;
  79         --) shift; break ;;
  80     esac
  81     shift
  82 done
  83
  84 # default to regex if >0 arguments specified
  85 if [[ ! -v mode ]] && (( $# > 0 )); then
  86     mode=regex
  87 elif [[ ! -v mode ]]; then
  88     mode=plain
  89 fi
  90
  91 if ! [[ $ttl =~ [0-9]+ ]]; then
  92     printf >&2 "%s: --ttl requires an integer ('%s' provided)\n" "$argv0" "$ttl"
  93     exit 1
  94 fi
  95
  96 # packages.gz cache
  97 mkdir -p -- "$AUR_METADEST"
  98
  99 if [[ ! -s $AUR_METADEST/headers_$pkglist || ! -s $AUR_METADEST/$pkglist ]]; then
 100     update=1
 101
 102 elif [[ -s $AUR_METADEST/$pkglist ]]; then
 103     sec_l=$(http_last_modified "$AUR_METADEST/headers_$pkglist" | date -f - '+%s')
 104
 105     if (( use_system_time )); then
 106         sec_d=$(date '+%s')
 107     else
 108         sec_d=$(http_last_modified <(list_headers "$AUR_LOCATION/$pkglist.gz") | date -f - '+%s')
 109     fi
 110
 111     if (( sec_d - sec_l > ttl )); then
 112         update=1
 113     fi
 114 fi
 115
 116 if (( update )); then
 117     list_fetch "$AUR_LOCATION/$pkglist.gz" --dump-header "$AUR_METADEST/headers_$pkglist" -o "$AUR_METADEST/$pkglist.gz"
 118
 119     if (( verify )); then
 120         list_fetch "$AUR_LOCATION/$pkglist.gz.sha256" -o "$AUR_METADEST/$pkglist.gz.sha256"
 121         sha256sum --check --strict --quiet "$AUR_METADEST/$pkglist.gz.sha256" || exit
 122     fi
 123
 124     if [[ $pkglist == *.json ]]; then
 125         # Remove newlines separating partial objects, i.e.
 126         #   [\n{...},\n{...},...\n]  =>  [{...}{...},...]\n
 127         { gunzip -c "$AUR_METADEST/$pkglist.gz" | tr -d '\n'
 128           printf '\n'
 129         } > "$AUR_METADEST/$pkglist"
 130     else
 131         gunzip -f "$AUR_METADEST/$pkglist.gz"
 132     fi
 133 fi >&2
 134
 135 # pattern match
 136 case $mode in
 137     plain)
 138         cat "$AUR_METADEST/$pkglist" ;;
 139     fixed)
 140         grep -F "$1" "$AUR_METADEST/$pkglist" ;;
 141     regex)
 142         grep -P "$1" "$AUR_METADEST/$pkglist" ;;
 143     none)
 144         printf '%s\n' "$AUR_METADEST/$pkglist" ;;
 145 esac
 146
 147 # vim: set et sw=4 sts=4 ft=sh: