shlib.sh

   1 #!/bin/sh
   2 #
   3 # This is generic shell library for all the scripts used by Girocco;
   4 # most importantly, it introduces all the $cfg_* shell variables.
   5
   6 # SHA-1 pattern
   7 octet='[0-9a-f][0-9a-f]'
   8 octet4="$octet$octet$octet$octet"
   9 octet19="$octet4$octet4$octet4$octet4$octet$octet$octet"
  10 octet20="$octet4$octet4$octet4$octet4$octet4"
  11
  12 get_girocco_config_var_list() {
  13         # Export all the variables from Girocco::Config to suitable var= lines
  14         # prefixing them with 'cfg_'. E.g. $cfg_admin is admin's mail address now
  15         # and also setting a 'defined_cfg_' prefix to 1 if they are not undef.
  16         __girocco_conf="$GIROCCO_CONF"
  17         [ -n "$__girocco_conf" ] || __girocco_conf="Girocco::Config"
  18         [ -z "$basedir" ] || __girocco_extrainc="-I$basedir"
  19         perl -I@basedir@ $__girocco_extrainc -M$__girocco_conf -le \
  20                 'foreach (sort {uc($a) cmp uc($b)} keys %Girocco::Config::) {
  21                         my $val = ${$Girocco::Config::{$_}}; defined($val) or $val="";
  22                         $val =~ s/([\\"\$\`])/\\$1/gos;
  23                         $val =~ s/(?:\r\n|\r|\n)$//os;
  24                         print "cfg_$_=\"$val\"";
  25                         print "defined_cfg_$_=",
  26                                 (defined(${$Girocco::Config::{$_}})?"1":"");
  27                 }'
  28 }
  29
  30 # If basedir has been replaced, and shlib_vars.sh exists, get the config
  31 # definitions from it rather than running Perl.
  32 if [ "@basedir@" = '@'basedir'@' ] || ! [ -r "@basedir@/shlib_vars.sh" ]; then
  33         # Import all the variables from Girocco::Config to the local environment,
  34         eval "$(get_girocco_config_var_list)"
  35 else
  36         # Import the variables from shlib_vars.sh which avoids needlessly
  37         # running another copy of Perl
  38         . "@basedir@/shlib_vars.sh"
  39 fi
  40
  41 # Make sure we have a reproducible environment by using a controlled HOME dir
  42 XDG_CONFIG_HOME="$cfg_chroot/var/empty"
  43 HOME="$cfg_chroot/etc/girocco"
  44 GIT_CONFIG_NOSYSTEM=1
  45 GIT_ATTR_NOSYSTEM=1
  46 GIT_TERMINAL_PROMPT=0
  47 GIT_ASKPASS="$cfg_basedir/bin/git-askpass-password"
  48 export XDG_CONFIG_HOME
  49 export HOME
  50 export GIT_CONFIG_NOSYSTEM
  51 export GIT_ATTR_NOSYSTEM
  52 export GIT_TERMINAL_PROMPT
  53 export GIT_ASKPASS
  54 unset GIT_USER_AGENT
  55 unset GIT_HTTP_USER_AGENT
  56 if [ -n "$defined_cfg_git_client_ua" ]; then
  57         GIT_USER_AGENT="$cfg_git_client_ua"
  58         export GIT_USER_AGENT
  59         GIT_HTTP_USER_AGENT="$cfg_git_client_ua"
  60         export GIT_HTTP_USER_AGENT
  61 fi
  62
  63 # We cannot use a git() {} or nc_openbsd() {} function to redirect git
  64 # and nc_openbsd to the desired executables because when using
  65 # "ENV_VAR=xxx func" the various /bin/sh implementations behave in various
  66 # different and unexpected ways:
  67 #   a) treat "ENV_VAR=xxx" like a separate, preceding "export ENV_VAR=xxx"
  68 #   b) treat "ENV_VAR=xxx" like a separate, prededing "ENV_VAR=xxx"
  69 #   c) treat "ENV_VAR=xxx" like a temporary setting only while running func
  70 # None of these are good.  We want a temporary "export ENV_VAR=xxx"
  71 # setting only while running func which none of the /bin/sh's do.
  72 #
  73 # Instead we'd like to use an alias that provides the desired behavior without
  74 # any of the bad (a), (b) or (c) effects.
  75 #
  76 # However, unfortunately, some of the crazy /bin/sh implementations do not
  77 # recognize alias expansions when preceded by variable assignments!
  78 #
  79 # So we are left with git() {} and nc_openbsd() {} functions and in the
  80 # case of git() {} we can compensate for (b) and (c) failing to export
  81 # but not (a) and (b) persisting the values so the caller will simply
  82 # have to beware and explicitly unset any variables that should not persist
  83 # beyond the function call itself.
  84
  85 git() (
  86         [ "${GIT_DIR+set}" = "set" ] && export GIT_DIR
  87         [ "${GIT_SSL_NO_VERIFY+set}" = "set" ] && export GIT_SSL_NO_VERIFY
  88         [ "${GIT_TRACE_PACKET+set}" = "set" ] && export GIT_TRACE_PACKET
  89         [ "${GIT_USER_AGENT+set}" = "set" ] && export GIT_USER_AGENT
  90         [ "${GIT_HTTP_USER_AGENT+set}" = "set" ] && export GIT_HTTP_USER_AGENT
  91         exec "$cfg_git_bin" "$@"
  92 )
  93
  94 nc_openbsd() { "$cfg_nc_openbsd_bin" "$@"; }
  95
  96 _addrlist() {
  97         _list=
  98         for _addr in "$@"; do
  99                 [ -z "$_list" ] || _list="$_list, "
 100                 _list="$_list$_addr"
 101         done
 102         echo "$_list"
 103 }
 104
 105 _sendmail() {
 106         _mailer="${cfg_sendmail_bin:-/usr/sbin/sendmail}"
 107         if [ -n "$cfg_sender" ]; then
 108                 "$_mailer" -i -f "$cfg_sender" "$@"
 109         else
 110                 "$_mailer" -i "$@"
 111         fi
 112 }
 113
 114 mail() {
 115         _subject=
 116         if [ "$1" = "-s" ]; then
 117                 shift
 118                 _subject="$1"
 119                 shift
 120         fi
 121         {
 122                 echo "From: \"$cfg_name\" ($cfg_title) <$cfg_admin>"
 123                 echo "To: $(_addrlist "$@")"
 124                 [ -z "$_subject" ] || echo "Subject: $_subject"
 125                 echo "MIME-Version: 1.0"
 126                 echo "Content-Type: text/plain; charset=utf-8"
 127                 echo "Content-Transfer-Encoding: 8bit"
 128                 echo "Auto-Submitted: auto-generated"
 129                 echo ""
 130                 cat
 131         } | _sendmail "$@"
 132 }
 133
 134 # bang CMD... will execute the command with well-defined failure mode;
 135 # set bang_action to string of the failed action ('clone', 'update', ...);
 136 # pre-set bang_once=1 to make sure jobs banging on a repo repeatedly will
 137 # not spam the owner; re-define the bang_trap() function to do custom
 138 # cleanup before bailing out
 139 bang() {
 140         if [ -n "$show_progress" ]; then
 141                 exec 3>&1
 142                 errcode=
 143                 read -r errcode <<-EOT || :
 144                 $(
 145                         exec 4>&3 3>&1 1>&4 4>&-
 146                         { "$@" 3>&- || echo $? >&3; } 2>&1 | tee -a "$bang_log"
 147                 )
 148                 EOT
 149                 exec 3>&-
 150                 if [ -z "$errcode" ]; then
 151                         # All right. Cool.
 152                         return;
 153                 fi
 154         else
 155                 if "$@" >>"$bang_log" 2>&1; then
 156                         # All right. Cool.
 157                         return;
 158                 else
 159                         errcode="$?"
 160                 fi
 161         fi
 162         if ! [ -e .banged ] || [ -e .bangagain ]; then
 163                 rm -f .bangagain
 164                 bangmailok=true
 165                 ! [ -f HEAD -a -f config -a -d objects ] ||
 166                 bangmailok="$(GIT_DIR=. git config --bool gitweb.statusupdates 2>/dev/null || echo true)"
 167                 bangaddrs=''
 168                 [ "$bangmailok" = "false" -o -z "$mail" ] || bangaddrs="$mail"
 169                 [ -z "$cfg_admincc" -o "$cfg_admincc" = "0" -o -z "$cfg_admin" ] ||
 170                 if [ -z "$bangaddrs" ]; then bangaddrs="$cfg_admin"; else bangaddrs="$bangaddrs,$cfg_admin"; fi
 171                 [ -z "$bangaddrs" ] ||
 172                 {
 173                         echo "$* failed with error code $errcode"
 174                         echo ""
 175                         [ ! -n "$bang_once" ] || echo "you will not receive any more notifications until recovery"
 176                         echo "this status message may be disabled on the project admin page"
 177                         echo ""
 178                         echo "Log follows:"
 179                         echo ""
 180                         cat "$bang_log"
 181                 } | mail -s "[$cfg_name] $proj $bang_action failed" "$bangaddrs"
 182         fi
 183         touch .banged
 184         cat "$bang_log" > .banglog
 185         bang_trap
 186         exit 1
 187 }
 188
 189 # bang_eval CMD... will evaluate the command with well-defined failure mode;
 190 # Identical to bang CMD... except the command is eval'd instead of executed.
 191 bang_eval() {
 192         bang eval "$*"
 193 }
 194
 195 # Default bang settings:
 196 bang_setup() {
 197         bang_action="lame_programmer"
 198         bang_once=
 199         bang_trap() { :; }
 200         bang_log="$(mktemp -t repomgr-XXXXXX)"
 201         trap 'rm -f "$bang_log"' EXIT
 202         trap 'exit 130' INT
 203         trap 'exit 143' TERM
 204 }
 205
 206 # Remove banged status
 207 bang_reset() {
 208         rm -f .banged .bangagain .banglog
 209 }
 210
 211 # Check to see if banged status
 212 is_banged() {
 213         [ -e .banged ]
 214 }
 215
 216
 217 # Progress report - if show_progress is set, shows the given message.
 218 progress() {
 219         [ ! -n "$show_progress" ] || echo "$@"
 220 }
 221
 222
 223 # Project config accessors; must be run in project directory
 224 config_get() {
 225         git config "gitweb.$1"
 226 }
 227
 228 config_set() {
 229         git config "gitweb.$1" "$2" && chgrp repo config && chmod g+w config
 230 }
 231
 232 config_set_raw() {
 233         git config "$1" "$2"        && chgrp repo config && chmod g+w config
 234 }
 235
 236 config_get_date_seconds() {
 237         _dt="$(config_get "$1" || :)"
 238         [ -n "$_dt" ] || return 1
 239         _ds="$(perl -I@basedir@ -MGirocco::Util -e "print parse_rfc2822_date('$_dt')")"
 240         [ -n "$_ds" ] || return 1
 241         echo "$_ds"
 242 }
 243
 244 # Tool for checking whether given number of seconds has not passed yet
 245 check_interval() {
 246         os="$(config_get_date_seconds "$1")" || return 1
 247         ns="$(date +%s)"
 248         [ $ns -lt $(($os+$2)) ]
 249 }
 250
 251
 252 # List all Git repositories, with given prefix if specified, one-per-line
 253 get_repo_list() {
 254         if [ -n "$1" ]; then
 255                 cut -d : -f 1,3 "$cfg_chroot"/etc/group | grep "^$1"
 256         else
 257                 cut -d : -f 1,3 "$cfg_chroot"/etc/group
 258         fi | while IFS=: read name id; do
 259                 [ $id -lt 65536 ] || echo "$name"
 260         done
 261 }
 262
 263 # returns empty string for non-mirrors, otherwise one of:
 264 #   m  =>  normal Git mirror
 265 #   s  =>  mirror from svn source
 266 #   d  =>  mirror from darcs source
 267 #   b  =>  mirror from bzr source
 268 #   h  =>  mirror from hg source
 269 # the optional passed in git dir defaults to "."
 270 # will fail if the directory does not have .nofetch and gitweb.baseurl
 271 # comes back empty
 272 get_mirror_type() {
 273         _gitdir="${1:-.}"
 274         # always return empty for non-mirrors
 275         [ ! -e "$_gitdir/.nofetch" ] || return 0
 276         _url="$(GIT_DIR="$_gitdir" config_get baseurl 2>/dev/null || :)"
 277         _url="${_url##* }"
 278         case "$_url" in
 279                 "")
 280                         return 1
 281                         ;;
 282                 svn://* | svn+http://* | svn+https://*)
 283                         echo 's'
 284                         ;;
 285                 darcs://*)
 286                         echo 'd'
 287                         ;;
 288                 bzr://*)
 289                         echo 'b'
 290                         ;;
 291                 hg+http://* | hg+https://*)
 292                         echo 'h'
 293                         ;;
 294                 *)
 295                         echo 'm'
 296                         ;;
 297         esac
 298         return 0
 299 }
 300
 301 # returns true if the passed in git dir (defaults to ".") is a mirror using git fast-import
 302 is_gfi_mirror() {
 303         case "$(get_mirror_type "$1" 2>/dev/null || :)" in
 304                 d|b|h)
 305                         # darcs, bzr and hg mirrors use git fast-import
 306                         return 0
 307                         ;;
 308                 *)
 309                         # Don't think git-svn currently uses git fast-import
 310                         # And Git mirrors certainly do not
 311                         return 1
 312                         ;;
 313         esac
 314         # assume it does not use git fast-import
 315         return 1
 316 }
 317
 318 # returns true if the passed in git dir (defaults to ".") is a mirror using git-svn
 319 is_svn_mirror() {
 320         [ "$(get_mirror_type "$1" 2>/dev/null || :)" = "s" ]
 321 }
 322
 323 # A well-known UTF-8 locale is required for some of the fast-import providers
 324 # in order to avoid mangling characters.  Ideally we could use "POSIX.UTF-8"
 325 # but that is not reliably UTF-8 but rather usually US-ASCII.
 326 # We parse the output of `locale -a` and select a suitable UTF-8 locale.
 327 # If we cannot find one in the `locale -a` output then we just use a well-known
 328 # UTF-8 locale and hope for the best.  We set LC_ALL to our choice and export
 329 # it.  We only set this temporarily when running the fast-import providers.
 330 set_utf8_locale() {
 331         _guess_locale="$(locale -a | grep -viE '^(posix|c)(\..*)?$' | \
 332                 grep -iE '\.utf-?8$' | sed -e 's/\.[Uu][Tt][Ff]-*8$//' | \
 333                 sed -e '/en_US/ s/^/0 /; /en_US/ !s/^/1 /' | LC_ALL=C sort | \
 334                 head -n 1 | cut -d ' ' -f 2)"
 335         LC_ALL="${_guess_locale:-en_US}.UTF-8"
 336         export LC_ALL
 337 }
 338
 339 # hg-fast-export | git fast-import with error handling in current directory GIT_DIR
 340 git_hg_fetch() (
 341         set_utf8_locale
 342         _python="${PYTHON:-python}"
 343         _err1=
 344         _err2=
 345         exec 3>&1
 346         { read -r _err1 || :; read -r _err2 || :; } <<-EOT
 347         $(
 348                 exec 4>&3 3>&1 1>&4 4>&-
 349                 {
 350                         _e1=0
 351                         [ -f hg2git-marks ] || touch hg2git-marks
 352                         _af="$(git config hg.authorsfile || :)"
 353                         _cmd='GIT_DIR="$(pwd)" "$_python" "$cfg_basedir/bin/hg-fast-export.py" \
 354                                 --repo    "$(pwd)/repo.hg" \
 355                                 --marks   "$(pwd)/hg2git-marks" \
 356                                 --mapping "$(pwd)/hg2git-mapping" \
 357                                 --heads   "$(pwd)/hg2git-heads" \
 358                                 --status  "$(pwd)/hg2git-state" \
 359                                 -U unknown --force --flatten --hg-hash'
 360                         [ -z "$_af" ] || _cmd="$_cmd"' --authors "$_af"'
 361                         eval "$_cmd" 3>&- || _e1=$?
 362                         echo $_e1 >&3
 363                 } | \
 364                 {
 365                         _e2=0
 366                         rm -f hg2git-marks.new
 367                         git fast-import \
 368                                 --export-marks="$(pwd)/hg2git-marks.new" \
 369                                 --export-pack-edges="$(pwd)/gfi-packs" \
 370                                 --force 3>&- || _e2=$?
 371                         echo $_e2 >&3
 372                 }
 373         )
 374         EOT
 375         exec 3>&-
 376         [ "$_err1" = 0 -a "$_err2" = 0 ] || return 1
 377         if [ -f hg2git-marks ]; then
 378                 rm -f hg2git-marks.old
 379                 mv hg2git-marks hg2git-marks.old
 380         else
 381                 touch hg2git-marks.old
 382         fi
 383         cat hg2git-marks.old hg2git-marks.new | \
 384                 LC_ALL=C sort -t : -k2,2n -u | \
 385                 sed -ne "/^:[1-9][0-9]* $octet20\$/p" > hg2git-marks
 386         rm hg2git-marks.old hg2git-marks.new
 387         rm -f hg2git-heads
 388         git branch --no-color | \
 389         while IFS= read -r _head; do
 390                 echo ":${_head#??} $(git rev-parse "refs/heads/${_head#??}")"
 391         done > hg2git-heads
 392 )