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 $cfg_* shell variables.
   5
   6 # hash patterns
   7 hexdig='[0-9a-f]'
   8 octet="$hexdig$hexdig"
   9 octet4="$octet$octet$octet$octet"
  10 octet19="$octet4$octet4$octet4$octet4$octet$octet$octet"
  11 octet20="$octet4$octet4$octet4$octet4$octet4"
  12 # tab (single \t between single quotes)
  13 tab='   '
  14
  15 # set a sane umask that never excludes any user or group permissions
  16 umask $(printf '0%03o' $(( $(umask) & ~0770 )) )
  17
  18 # set the variable named by the first argument
  19 # to the number of additional arguments
  20 v_cnt() {
  21         eval "$1="'$(( $# - 1 ))'
  22 }
  23
  24 vcmp() {
  25         # Compare $1 to $2 each of which must match \d+(\.\d+)*
  26         # An empty string ('') for $1 or $2 is treated like 0
  27         # Outputs:
  28         #  -1 if $1 < $2
  29         #   0 if $1 = $2
  30         #   1 if $1 > $2
  31         # Note that `vcmp 1.8 1.8.0.0.0.0` correctly outputs 0.
  32         while
  33                 _a="${1%%.*}"
  34                 _b="${2%%.*}"
  35                 [ -n "$_a" ] || [ -n "$_b" ]
  36         do
  37                 if [ "${_a:-0}" -lt "${_b:-0}" ]; then
  38                         echo -1
  39                         return
  40                 elif [ "${_a:-0}" -gt "${_b:-0}" ]; then
  41                         echo 1
  42                         return
  43                 fi
  44                 _a2="${1#$_a}"
  45                 _b2="${2#$_b}"
  46                 set -- "${_a2#.}" "${_b2#.}"
  47         done
  48         echo 0
  49 }
  50
  51 unset orig_path
  52 get_girocco_config_pm_var_list() (
  53         # Export all the variables from Girocco::Config to suitable var= lines
  54         # prefixing them with 'cfg_'. E.g. $cfg_admin is admin's mail address now
  55         # and also setting a 'defined_cfg_' prefix to 1 if they are not undef.
  56         __girocco_conf="$GIROCCO_CONF"
  57         [ -n "$__girocco_conf" ] || __girocco_conf="Girocco::Config"
  58         [ -z "$basedir" ] || __girocco_extrainc="-I$basedir"
  59         inc_basedir=@basedir@
  60         [ "@basedir@" != '@'basedir'@' ] || inc_basedir="$PWD"
  61         [ -z "$orig_path" ] || { PATH="$orig_path" && export PATH; }
  62         perl -I"$inc_basedir" $__girocco_extrainc -M$__girocco_conf -le \
  63                 'foreach (sort {uc($a) cmp uc($b)} keys %Girocco::Config::) {
  64                         my $val = ${$Girocco::Config::{$_}}; defined($val) or $val="";
  65                         $val =~ s/([\\"\$\`])/\\$1/gos;
  66                         $val =~ s/(?:\r\n|\r|\n)$//os;
  67                         print "cfg_$_=\"$val\"";
  68                         print "defined_cfg_$_=",
  69                                 (defined(${$Girocco::Config::{$_}})?"1":"");
  70                 }'
  71 )
  72
  73 # Returns full command path for "$1" if it's a valid command otherwise returns "$1"
  74 _fcp() {
  75         if _fp="$(command -v "$1" 2>/dev/null)"; then
  76                 printf '%s\n' "$_fp"
  77         else
  78                 printf '%s\n' "$1"
  79         fi
  80 }
  81
  82 get_girocco_config_var_list() (
  83         # Same as get_girocco_config_pm_var_list except that
  84         # the following variables (all starting with var_) are added:
  85         # var_group             cfg_owning_group if defined otherwise `id -gn`
  86         # var_group_gid         group id number of $var_group
  87         # var_mirror_uid        user id number of $cfg_mirror_user
  88         # var_cgi_uid           user id number of $cfg_cgi_user
  89         # var_git_ver           The version number part from `git version`
  90         # var_git_exec_path     The result of $cfg_git_bin --exec-dir
  91         # var_sh_bin            Full path to the posix sh interpreter to use
  92         # var_perl_bin          Full path to the perl interpreter to use
  93         # var_gzip_bin          Full path to the gzip executable to use
  94         # var_nc_openbsd_bin    Full path to the netcat (nc) with -U support
  95         # var_have_git_171      Set to 1 if git version >= 1.7.1 otherwise ''
  96         # var_have_git_172      Set to 1 if git version >= 1.7.2 otherwise ''
  97         # var_have_git_173      Set to 1 if git version >= 1.7.3 otherwise ''
  98         # var_have_git_1710     Set to 1 if git version >= 1.7.10 otherwise ''
  99         # var_have_git_185      Set to 1 if git version >= 1.8.5 otherwise ''
 100         # var_have_git_210      Set to 1 if git version >= 2.1.0 otherwise ''
 101         # var_have_git_235      Set to 1 if git version >= 2.3.5 otherwise ''
 102         # var_have_git_260      Set to 1 if git version >= 2.6.0 otherwise ''
 103         # var_have_git_2101     Set to 1 if git version >= 2.10.1 otherwise ''
 104         # var_window_memory     Value to use for repack --window-memory=
 105         # var_big_file_threshold Value to use for core.bigFileThreshold
 106         # var_redelta_threshold Recompute deltas if no more than this many objs
 107         # var_upload_window     If not "", pack.window to use for upload-pack
 108         # var_log_window_size   Value to use for git-svn --log-window-size=
 109         # var_utf8_locale       Value to use for a UTF-8 locale if available
 110         # var_xargs_r           A "-r" if xargs needs it to behave correctly
 111         # var_du_exclude        Option to exclude PATTERN from du if available
 112         # var_du_follow         Option to follow command line sym links if available
 113         # var_xfsz_err          Shell error code when child dies from SIGXFSZ
 114         _cfg_vars="$(get_girocco_config_pm_var_list)"
 115         eval "$_cfg_vars"
 116         printf '%s\n' "$_cfg_vars"
 117         printf 'var_group=%s\n' "${cfg_owning_group:-$(id -gn)}"
 118         perl - "$var_group" "$cfg_mirror_user" "$cfg_cgi_user" <<-'PERLPROG'
 119                 no warnings;
 120                 my $gid = getgrnam($ARGV[0]);
 121                 my $mid = getpwnam($ARGV[1]);
 122                 my $cid = getpwnam($ARGV[2]);
 123                 defined($gid) && $gid ne '' and print "var_group_gid=$gid\n";
 124                 defined($mid) && $mid ne '' and print "var_mirror_uid=$mid\n";
 125                 defined($cid) && $cid ne '' and print "var_cgi_uid=$cid\n";
 126         PERLPROG
 127         _gver="$("$cfg_git_bin" version 2>/dev/null |
 128                 LC_ALL=C sed -ne 's/^[^0-9]*\([0-9][0-9]*\(\.[0-9][0-9]*\)*\).*$/\1/p')"
 129         printf 'var_git_ver=%s\n' "$_gver"
 130         printf 'var_git_exec_path="%s"\n' "$("$cfg_git_bin" --exec-path 2>/dev/null)"
 131         printf 'var_sh_bin="%s"\n' "$(_fcp "${cfg_posix_sh_bin:-/bin/sh}")"
 132         printf 'var_perl_bin="%s"\n' "$(_fcp "${cfg_perl_bin:-$(unset -f perl; command -v perl)}")"
 133         printf 'var_gzip_bin="%s"\n' "$(_fcp "${cfg_gzip_bin:-$(unset -f gzip; command -v gzip)}")"
 134         printf 'var_nc_openbsd_bin="%s"\n' "$(_fcp "${cfg_nc_openbsd_bin:-$(unset -f nc; command -v nc)}")"
 135         printf 'var_have_git_171=%s\n' "$([ $(vcmp "$_gver" 1.7.1) -ge 0 ] && echo 1)"
 136         printf 'var_have_git_172=%s\n' "$([ $(vcmp "$_gver" 1.7.2) -ge 0 ] && echo 1)"
 137         printf 'var_have_git_173=%s\n' "$([ $(vcmp "$_gver" 1.7.3) -ge 0 ] && echo 1)"
 138         printf 'var_have_git_1710=%s\n' "$([ $(vcmp "$_gver" 1.7.10) -ge 0 ] && echo 1)"
 139         printf 'var_have_git_185=%s\n' "$([ $(vcmp "$_gver" 1.8.5) -ge 0 ] && echo 1)"
 140         printf 'var_have_git_210=%s\n' "$([ $(vcmp "$_gver" 2.1.0) -ge 0 ] && echo 1)"
 141         printf 'var_have_git_235=%s\n' "$([ $(vcmp "$_gver" 2.3.5) -ge 0 ] && echo 1)"
 142         printf 'var_have_git_260=%s\n' "$([ $(vcmp "$_gver" 2.6.0) -ge 0 ] && echo 1)"
 143         printf 'var_have_git_2101=%s\n' "$([ $(vcmp "$_gver" 2.10.1) -ge 0 ] && echo 1)"
 144         __girocco_conf="$GIROCCO_CONF"
 145         [ -n "$__girocco_conf" ] || __girocco_conf="Girocco::Config"
 146         [ -z "$basedir" ] || __girocco_extrainc="-I$basedir"
 147         inc_basedir=@basedir@
 148         [ "@basedir@" != '@'basedir'@' ] || inc_basedir="$PWD"
 149         printf "var_window_memory=%s\n" \
 150                 "$(perl -I"$inc_basedir" $__girocco_extrainc -M$__girocco_conf \
 151                 -MGirocco::Util -e 'print calc_windowmemory')"
 152         printf "var_big_file_threshold=%s\n" \
 153                 "$(perl -I"$inc_basedir" $__girocco_extrainc -M$__girocco_conf \
 154                 -MGirocco::Util -e 'print calc_bigfilethreshold')"
 155         printf "var_redelta_threshold=%s\n" \
 156                 "$(perl -I"$inc_basedir" $__girocco_extrainc -M$__girocco_conf \
 157                 -MGirocco::Util -e 'print calc_redeltathreshold')"
 158         if [ -n "$cfg_upload_pack_window" ] && [ "$cfg_upload_pack_window" -ge 2 ] &&
 159            [ "$cfg_upload_pack_window" -le 50 ]; then
 160                 printf "var_upload_window=%s\n" "$cfg_upload_pack_window"
 161         else
 162                 printf "var_upload_window=%s\n" ""
 163         fi
 164         printf 'var_log_window_size=%s\n' "${cfg_svn_log_window_size:-250}"
 165         # We parse the output of `locale -a` and select a suitable UTF-8 locale.
 166         _guess_locale="$(locale -a | LC_ALL=C grep -viE '^(posix|c)(\..*)?$' |
 167                 LC_ALL=C grep -iE '\.utf-?8$' | LC_ALL=C sed -e 's/\.[Uu][Tt][Ff]-*8$//' |
 168                 LC_ALL=C sed -e '/en_US/ s/^/0 /; /en_US/ !s/^/1 /' | LC_ALL=C sort |
 169                 head -n 1 | LC_ALL=C cut -d ' ' -f 2)"
 170         [ -z "$_guess_locale" ] || printf 'var_utf8_locale=%s.UTF-8\n' "$_guess_locale"
 171         # On some broken platforms running xargs without -r and empty input runs the command
 172         printf 'var_xargs_r=%s\n' "$(</dev/null command xargs printf %s -r)"
 173         # The disk usage report produces better numbers if du has an exclude option
 174         _x0="${0##*/}"
 175         _x0="${_x0%?}?*"
 176         for _duopt in --exclude -I; do
 177                 if _test="$(du $_duopt 's?lib.s*' $_duopt "$_x0" "$0" 2>/dev/null)" && [ -z "$_test" ]; then
 178                         printf 'var_du_exclude=%s\n' "$_duopt"
 179                         break
 180                 fi
 181         done
 182         if _test="$(du -H "$0" 2>/dev/null)" && [ -n "$_test" ]; then
 183                 printf 'var_du_follow=%s\n' "-H"
 184                 break
 185         fi
 186         ul512bin="$inc_basedir/bin/ulimit512"
 187         if [ ! -x "$ul512bin" ] && [ -x "$inc_basedir/src/ulimit512" ]; then
 188                 ul512bin="$inc_basedir/src/ulimit512"
 189         fi
 190         ebin="/bin/echo"
 191         if [ ! -x "$ebin" ] && [ -x "/usr/bin/echo" ]; then
 192                 ebin="/usr/bin/echo"
 193         fi
 194         if [ -x "$ul512bin" ]; then
 195                 tmpfile="$(mktemp /tmp/ul512-$$-XXXXXX)"
 196                 ec=999
 197                 { "$ul512bin" -f 0 "$ebin" test >"$tmpfile" || ec=$?; } >/dev/null 2>&1
 198                 rm -f "$tmpfile"
 199                 if [ "$ec" != 999 ] && [ "$ec" -gt 0 ]; then
 200                         printf 'var_xfsz_err=%s\n' "$ec"
 201                 fi
 202         fi
 203 )
 204
 205 # If basedir has been replaced, and shlib_vars.sh exists, get the config
 206 # definitions from it rather than running Perl.
 207 if [ "@basedir@" = '@'basedir'@' ] || ! [ -r "@basedir@/shlib_vars.sh" ]; then
 208         # Import all the variables from Girocco::Config to the local environment,
 209         eval "$(get_girocco_config_var_list)"
 210 else
 211         # Import the variables from shlib_vars.sh which avoids needlessly
 212         # running another copy of Perl
 213         . "@basedir@/shlib_vars.sh"
 214 fi
 215
 216 # git_add_config "some.var=value"
 217 # every ' in value must be replaced with the 4-character sequence '\'' before
 218 # calling this function or Git will barf.  Will not be effective unless running
 219 # Git version 1.7.3 or later.
 220 git_add_config() {
 221         GIT_CONFIG_PARAMETERS="${GIT_CONFIG_PARAMETERS:+$GIT_CONFIG_PARAMETERS }'$1'"
 222         export GIT_CONFIG_PARAMETERS
 223 }
 224
 225 # file of empty lines
 226 mtlinesfile="$cfg_basedir/mtlinesfile"
 227 # created by installer, but if not exists, set to /dev/null
 228 [ -e "$mtlinesfile" ] && [ -f "$mtlinesfile" ] && [ -r "$mtlinesfile" ] ||
 229         mtlinesfile='/dev/null'
 230
 231 # Make sure we have a reproducible environment by using a controlled HOME dir
 232 XDG_CONFIG_HOME="$cfg_chroot/var/empty"
 233 HOME="$cfg_chroot/etc/girocco"
 234 TMPDIR="/tmp"
 235 GIT_CONFIG_NOSYSTEM=1
 236 GIT_ATTR_NOSYSTEM=1
 237 GIT_NO_REPLACE_OBJECTS=1
 238 GIT_TERMINAL_PROMPT=0
 239 GIT_PAGER="cat"
 240 PAGER="cat"
 241 GIT_ASKPASS="$cfg_basedir/bin/git-askpass-password"
 242 GIT_SVN_NOTTY=1
 243 GIROCCO_SUPPRESS_AUTO_GC_UPDATE=1
 244 GIT_SSH="$cfg_basedir/bin/git-ssh"
 245 SVN_SSH="$cfg_basedir/bin/git-ssh"
 246 export XDG_CONFIG_HOME
 247 export HOME
 248 export TMPDIR
 249 export GIT_CONFIG_NOSYSTEM
 250 export GIT_ATTR_NOSYSTEM
 251 export GIT_NO_REPLACE_OBJECTS
 252 export GIT_TERMINAL_PROMPT
 253 export GIT_PAGER
 254 export PAGER
 255 export GIT_ASKPASS
 256 export GIT_SVN_NOTTY
 257 export GIROCCO_SUPPRESS_AUTO_GC_UPDATE
 258 export GIT_SSH
 259 export SVN_SSH
 260 unset GIT_USER_AGENT
 261 unset GIT_HTTP_USER_AGENT
 262 if [ -n "$defined_cfg_git_client_ua" ]; then
 263         GIT_USER_AGENT="$cfg_git_client_ua"
 264         export GIT_USER_AGENT
 265 fi
 266 unset GIT_CONFIG_PARAMETERS
 267 unset GIROCCO_DIVERT_GIT_SVN_AUTO_GC
 268
 269 #
 270 ## IMPORTANT!
 271 ##
 272 ## Keep gitweb/gitweb_config.perl in sync with these git_add_config calls
 273 ## Keep bin/git-shell-verify in sync with these git_add_config calls
 274 #
 275 git_add_config "core.ignoreCase=false"
 276 git_add_config "core.pager=cat"
 277 if [ -n "$cfg_git_no_mmap" ]; then
 278         # Just like compiling with NO_MMAP
 279         git_add_config "core.packedGitWindowSize=1m"
 280 else
 281         # Always use the 32-bit default (32m) even on 64-bit to avoid memory blowout
 282         git_add_config "core.packedGitWindowSize=32m"
 283 fi
 284 # Always use the 32-bit default (256m) even on 64-bit to avoid memory blowout
 285 git_add_config "core.packedGitLimit=256m"
 286 [ -z "$var_big_file_threshold" ] ||
 287         git_add_config "core.bigFileThreshold=$var_big_file_threshold"
 288 git_add_config "gc.auto=0"
 289 git_add_config "gc.autodetach=false"
 290
 291 # Make sure any sendmail.pl config is always available
 292 unset SENDMAIL_PL_HOST
 293 unset SENDMAIL_PL_PORT
 294 unset SENDMAIL_PL_NCBIN
 295 unset SENDMAIL_PL_NCOPT
 296 [ -z "$cfg_sendmail_pl_host"  ] || { SENDMAIL_PL_HOST="$cfg_sendmail_pl_host"   && export SENDMAIL_PL_HOST; }
 297 [ -z "$cfg_sendmail_pl_port"  ] || { SENDMAIL_PL_PORT="$cfg_sendmail_pl_port"   && export SENDMAIL_PL_PORT; }
 298 [ -z "$cfg_sendmail_pl_ncbin" ] || { SENDMAIL_PL_NCBIN="$cfg_sendmail_pl_ncbin" && export SENDMAIL_PL_NCBIN; }
 299 [ -z "$cfg_sendmail_pl_ncopt" ] || { SENDMAIL_PL_NCOPT="$cfg_sendmail_pl_ncopt" && export SENDMAIL_PL_NCOPT; }
 300
 301 # Set PATH and PYTHON to the values set by Config.pm, if any
 302 unset PYTHON
 303 [ -z "$cfg_python" ] || { PYTHON="$cfg_python" && export PYTHON; }
 304 [ -z "$cfg_path" ] || { orig_path="$PATH" && PATH="$cfg_path" && export PATH; }
 305
 306 # Extra GIT variables that generally ought to be cleared, but whose clearing
 307 # could potentially interfere with the correct operation of hook scripts so
 308 # they are segregated into a separate function for use as appropriate
 309 clean_git_env() {
 310         unset GIT_ALTERNATE_OBJECT_DIRECTORIES
 311         unset GIT_CONFIG
 312         unset GIT_DIR
 313         unset GIT_GRAFT_FILE
 314         unset GIT_INDEX_FILE
 315         unset GIT_OBJECT_DIRECTORY
 316         unset GIT_NAMESPACE
 317 }
 318
 319 # We cannot use a git() {} or nc_openbsd() {} function to redirect git
 320 # and nc_openbsd to the desired executables because when using
 321 # "ENV_VAR=xxx func" the various /bin/sh implementations behave in various
 322 # different and unexpected ways:
 323 #   a) treat "ENV_VAR=xxx" like a separate, preceding "export ENV_VAR=xxx"
 324 #   b) treat "ENV_VAR=xxx" like a separate, prededing "ENV_VAR=xxx"
 325 #   c) treat "ENV_VAR=xxx" like a temporary setting only while running func
 326 # None of these are good.  We want a temporary "export ENV_VAR=xxx"
 327 # setting only while running func which none of the /bin/sh's do.
 328 #
 329 # Instead we'd like to use an alias that provides the desired behavior without
 330 # any of the bad (a), (b) or (c) effects.
 331 #
 332 # However, unfortunately, some of the crazy /bin/sh implementations do not
 333 # recognize alias expansions when preceded by variable assignments!
 334 #
 335 # So we are left with git() {} and nc_openbsd() {} functions and in the
 336 # case of git() {} we can compensate for (b) and (c) failing to export
 337 # but not (a) and (b) persisting the values so the caller will simply
 338 # have to beware and explicitly unset any variables that should not persist
 339 # beyond the function call itself.
 340
 341 _setexport_gitvars() {
 342         [ z"${GIT_DIR+set}" != z"set" ]                 || export GIT_DIR
 343         [ z"${GIT_SSL_NO_VERIFY+set}" != z"set" ]       || export GIT_SSL_NO_VERIFY
 344         [ z"${GIT_TRACE_PACKET+set}" != z"set" ]        || export GIT_TRACE_PACKET
 345         [ z"${GIT_USER_AGENT+set}" != z"set" ]          || export GIT_USER_AGENT
 346         [ z"${GIT_HTTP_USER_AGENT+set}" != z"set" ]     || export GIT_HTTP_USER_AGENT
 347 }
 348
 349 git() (
 350         _setexport_gitvars
 351         exec "$cfg_git_bin" "$@"
 352 )
 353
 354 # git_ulimit behaves the same as git except that it runs git using ulimit512
 355 # with the value of $cfg_max_file_size512 if that is set and greater than 0
 356
 357 git_ulimit() (
 358         _setexport_gitvars
 359         if [ "${cfg_max_file_size512:-0}" = "0" ]; then
 360                 exec "$cfg_git_bin" "$@"
 361         else
 362                 exec "$cfg_basedir/bin/ulimit512" -i -f "$cfg_max_file_size512" -- "$cfg_git_bin" "$@"
 363         fi
 364 )
 365
 366 # Since we do not yet require at least Git 1.8.5 this is a compatibility function
 367 # that allows us to use git update-ref --stdin where supported and the slow shell
 368 # script where not, but only the "delete" operation is currently supported.
 369 git_updateref_stdin() {
 370         if [ -n "$var_have_git_185" ]; then
 371                 git update-ref --stdin
 372         else
 373                 while read -r _op _ref; do
 374                         case "$_op" in
 375                                 delete)
 376                                         git update-ref -d "$_ref"
 377                                         ;;
 378                                 *)
 379                                         echo "bad git_updateref_stdin op: $_op" >&2
 380                                         exit 1
 381                                         ;;
 382                         esac
 383                 done
 384         fi
 385 }
 386
 387 # see comments for git() -- callers must explicitly export all variables
 388 # intended for the commands these functions run before calling them
 389 perl() { command "${var_perl_bin:-perl}" "$@"; }
 390 gzip() { command "${var_gzip_bin:-gzip}" "$@"; }
 391
 392 nc_openbsd() { command "$var_nc_openbsd_bin" "$@"; }
 393
 394 list_packs() { command "$cfg_basedir/bin/list_packs" "$@"; }
 395
 396 readlink() { command "$cfg_basedir/bin/readlink" "$@"; }
 397
 398 strftime() { command "$cfg_basedir/bin/strftime" "$@"; }
 399
 400 # Some platforms' broken xargs runs the command always at least once even if
 401 # there's no input unless given a special option.  Automatically supply the
 402 # option on those platforms by providing an xargs function.
 403 xargs() { command xargs $var_xargs_r "$@"; }
 404
 405 _addrlist() {
 406         _list=
 407         for _addr in "$@"; do
 408                 [ -z "$_list" ] || _list="$_list, "
 409                 _list="$_list$_addr"
 410         done
 411         echo "$_list"
 412 }
 413
 414 _sendmail() {
 415         _mailer="${cfg_sendmail_bin:-/usr/sbin/sendmail}"
 416         if [ -n "$cfg_sender" ]; then
 417                 "$_mailer" -i -f "$cfg_sender" "$@"
 418         else
 419                 "$_mailer" -i "$@"
 420         fi
 421 }
 422
 423 # First argument is an id WITHOUT surrounding '<' and '>' to use in a
 424 # "References:" header.  It may be "" to suppress the "References" header.
 425 # Following arguments are just like mail function
 426 mailref() {
 427         _references=
 428         if [ $# -ge 1 ]; then
 429                 _references="$1"
 430                 shift
 431         fi
 432         _subject=
 433         if [ "$1" = "-s" ]; then
 434                 shift
 435                 _subject="$1"
 436                 shift
 437         fi
 438         {
 439                 echo "From: \"$cfg_name\" ($cfg_title) <$cfg_admin>"
 440                 echo "To: $(_addrlist "$@")"
 441                 [ -z "$_subject" ] || echo "Subject: $_subject"
 442                 echo "MIME-Version: 1.0"
 443                 echo "Content-Type: text/plain; charset=utf-8; format=fixed"
 444                 echo "Content-Transfer-Encoding: 8bit"
 445                 [ -z "$_references" ] || echo "References: <$_references>"
 446                 [ -n "$cfg_suppress_x_girocco" ] || echo "X-Girocco: $cfg_gitweburl"
 447                 echo "Auto-Submitted: auto-generated"
 448                 echo ""
 449                 cat
 450         } | _sendmail "$@"
 451 }
 452
 453 # Usage: mail [-s <subject>] <addr> [<addr>...]
 454 mail() {
 455         mailref "" "$@"
 456 }
 457
 458 # bang CMD... will execute the command with well-defined failure mode;
 459 # set bang_action to string of the failed action ('clone', 'update', ...);
 460 # re-define the bang_trap() function to do custom cleanup before bailing out
 461 bang() {
 462         bang_errcode=
 463         bang_catch "$@"
 464         [ "${bang_errcode:-0}" = "0" ] || bang_failed
 465 }
 466
 467 bang_catch() {
 468         bang_active=1
 469         bang_cmd="$*"
 470         bang_errcode=0
 471         if [ "${show_progress:-0}" != "0" ]; then
 472                 exec 3>&1
 473                 read -r bang_errcode <<-EOT || :
 474                 $(
 475                         exec 4>&3 3>&1 1>&4 4>&-
 476                         { "$@" 3>&- || echo $? >&3; } 2>&1 | tee -i -a "$bang_log"
 477                 )
 478                 EOT
 479                 exec 3>&-
 480                 if [ -z "$bang_errcode" ] || [ "$bang_errcode" = "0" ]; then
 481                         # All right. Cool.
 482                         bang_active=
 483                         bang_cmd=
 484                         return;
 485                 fi
 486         else
 487                 if "$@" >>"$bang_log" 2>&1; then
 488                         # All right. Cool.
 489                         bang_active=
 490                         bang_cmd=
 491                         return;
 492                 else
 493                         bang_errcode="$?"
 494                 fi
 495         fi
 496 }
 497
 498 bang_failed() {
 499         bang_active=
 500         unset GIT_DIR
 501         >.banged
 502         cat "$bang_log" >.banglog
 503         echo "" >>.banglog
 504         echo "$bang_cmd failed with error code $bang_errcode" >>.banglog
 505         ! [ -d htmlcache ] || { >htmlcache/changed; } 2>/dev/null || :
 506         if [ "${show_progress:-0}" != "0" ]; then
 507                 echo ""
 508                 echo "$bang_cmd failed with error code $bang_errcode"
 509         fi
 510         if [ -e .bangagain ]; then
 511                 git config --remove-section girocco.bang 2>/dev/null || :
 512                 rm -f .bangagain
 513         fi
 514         bangcount="$(git config --int girocco.bang.count 2>/dev/null)" || :
 515         bangcount=$(( ${bangcount:-0} + 1 ))
 516         git config --int girocco.bang.count $bangcount
 517         if [ $bangcount -eq 1 ]; then
 518                 git config girocco.bang.firstfail "$(TZ=UTC date "+%Y-%m-%d %T UTC")"
 519         fi
 520         if [ $bangcount -ge $cfg_min_mirror_failure_message_count ] &&
 521            [ "$(git config --bool girocco.bang.messagesent 2>/dev/null || :)" != "true" ] &&
 522            ! check_interval "girocco.bang.firstfail" $cfg_min_mirror_failure_message_interval; then
 523                 bangmailok="$(git config --bool gitweb.statusupdates 2>/dev/null || echo true)"
 524                 bangaddrs=
 525                 [ "$bangmailok" = "false" ] || [ -z "$mail" ] || bangaddrs="$mail"
 526                 [ -z "$cfg_admincc" ] || [ "$cfg_admincc" = "0" ] || [ -z "$cfg_admin" ] ||
 527                 if [ -z "$bangaddrs" ]; then bangaddrs="$cfg_admin"; else bangaddrs="$bangaddrs,$cfg_admin"; fi
 528                 rsubj=
 529                 [ $bangcount -le 1 ] || rsubj=" repeatedly"
 530                 [ -z "$bangaddrs" ] ||
 531                 {
 532                         echo "$bang_cmd failed with error code $bang_errcode"
 533                         echo ""
 534                         rsubj=
 535                         if [ $bangcount -gt 1 ]; then
 536                                 echo "$bangcount consecutive update failures have occurred since $(config_get girocco.bang.firstfail)"
 537                                 echo ""
 538                         fi
 539                         echo "you will not receive any more notifications until recovery"
 540                         echo "this status message may be disabled on the project admin page"
 541                         echo ""
 542                         echo "Log follows:"
 543                         echo ""
 544                         cat "$bang_log"
 545                 } | mailref "update@$cfg_gitweburl/$proj.git" -s "[$cfg_name] $proj $bang_action failed$rsubj" "$bangaddrs"
 546                 git config --bool girocco.bang.messagesent true
 547         fi
 548         bangthrottle=
 549         [ $bangcount -lt 15 ] ||
 550                 check_interval "girocco.bang.firstfail" $(( $cfg_min_mirror_interval * 3 / 2 )) ||
 551                 bangthrottle=1
 552         bang_trap $bangthrottle
 553         [ -n "$bang_errcode" ] && [ "$bang_errcode" != "0" ] || bang_errcode=1
 554         exit $bang_errcode
 555 }
 556
 557 # bang_eval CMD... will evaluate the command with well-defined failure mode;
 558 # Identical to bang CMD... except the command is eval'd instead of executed.
 559 bang_eval() {
 560         bang eval "$*"
 561 }
 562
 563 # Default bang settings:
 564 bang_setup() {
 565         bang_active=
 566         bang_action="lame_programmer"
 567         bang_trap() { :; }
 568         bang_tmpdir="${TMPDIR:-/tmp}"
 569         bang_tmpdir="${bang_tmpdir%/}"
 570         bang_log="$(mktemp "${bang_tmpdir:-/tmp}/repomgr-XXXXXX")"
 571         is_git_dir . || {
 572                 echo "bang_setup called with current directory not a git directory" >&2
 573                 exit 1
 574         }
 575         trap 'rm -f "$bang_log"' EXIT
 576         trap '[ -z "$bang_active" ] || { bang_errcode=130; bang_failed; }; exit 130' INT
 577         trap '[ -z "$bang_active" ] || { bang_errcode=143; bang_failed; }; exit 143' TERM
 578 }
 579
 580 # Remove banged status
 581 bang_reset() {
 582         rm -f .banged .bangagain .banglog
 583         git config --remove-section girocco.bang 2>/dev/null || :
 584 }
 585
 586 # Check to see if banged status
 587 is_banged() {
 588         [ -e .banged ]
 589 }
 590
 591 # Check to see if banged message was sent
 592 was_banged_message_sent() {
 593         [ "$(git config --bool girocco.bang.messagesent 2>/dev/null || :)" = "true" ]
 594 }
 595
 596 # Progress report - if show_progress is set, shows the given message.
 597 progress() {
 598         [ "${show_progress:-0}" = "0" ] || echo "$*"
 599 }
 600
 601 # Project config accessors; must be run in project directory
 602 config_get() {
 603         case "$1" in
 604         *.*)
 605                 git config "$1";;
 606         *)
 607                 git config "gitweb.$1";;
 608         esac
 609 }
 610
 611 config_set() {
 612         git config "gitweb.$1" "$2" && chgrp $var_group config && chmod g+w config
 613 }
 614
 615 config_set_raw() {
 616         git config "$1" "$2"        && chgrp $var_group config && chmod g+w config
 617 }
 618
 619 config_get_date_seconds() {
 620         _dt="$(config_get "$1")" || :
 621         [ -n "$_dt" ] || return 1
 622         _ds="$(perl -I@basedir@ -MGirocco::Util -e "print parse_any_date('$_dt')")"
 623         [ -n "$_ds" ] || return 1
 624         echo "$_ds"
 625 }
 626
 627 # Tool for checking whether given number of seconds has not passed yet
 628 check_interval() {
 629         os="$(config_get_date_seconds "$1")" || return 1
 630         ns="$(date +%s)"
 631         [ $ns -lt $(($os+$2)) ]
 632 }
 633
 634 # Check if we are running with effective root permissions
 635 is_root() {
 636         [ "$(id -u 2>/dev/null)" = "0" ]
 637 }
 638
 639 # Check to see if the single argument (default ".") is a Git directory
 640 is_git_dir() {
 641         # Just like Git's test except we ignore GIT_OBJECT_DIRECTORY
 642         # And we are slightly more picky (must be refs/.+ not refs/.*)
 643         [ $# -ne 0 ] || set -- "."
 644         [ -d "$1/objects" ] && [ -x "$1/objects" ] || return 1
 645         [ -d "$1/refs" ] && [ -x "$1/refs" ] || return 1
 646         if [ -L "$1/HEAD" ]; then
 647                 _hr="$(readlink "$1/HEAD")"
 648                 case "$_hr" in "refs/"?*) :;; *) return 1;; esac
 649         fi
 650         [ -f "$1/HEAD" ] && [ -r "$1/HEAD" ] || return 1
 651         read -r _hr <"$1/HEAD" || return 1
 652         case "$_hr" in
 653                 $octet20*)
 654                         [ "${_hr#*[!0-9a-f]}" = "$_hr" ] || return 1
 655                         return 0;;
 656                 ref:refs/?*)
 657                         return 0;;
 658                 ref:*)
 659                         _hr="${_hr##ref:*[ $tab]}"
 660                         case "$_hr" in "refs/"?*) return 0;; esac
 661         esac
 662         return 1
 663 }
 664
 665 # Check to see if the single argument (default ".") is a directory with no refs
 666 is_empty_refs_dir() {
 667         [ $# -ne 0 ] || set -- "."
 668         if [ -s "$1/packed-refs" ]; then
 669                 # could be a packed-refs file with just a '# pack-refs ..." line
 670                 # null hash lines and peel lines do not count either
 671                 _refcnt="$(( $(LC_ALL=C sed <"$1/packed-refs" \
 672                         -e "/^00* /d" \
 673                         -e "/^$octet20$hexdig* refs\/[^ $tab]*\$/!d" | wc -l) ))"
 674                 [ "${_refcnt:-0}" -eq 0 ] || return 1
 675         fi
 676         if [ -d "$1/refs" ]; then
 677                 # quick and dirty check, doesn't try to validate contents
 678                 # or ignore embedded symbolic refs
 679                 _refcnt="$(( $(find -L "$1/refs" -type f -print 2>/dev/null | head -n 1 | LC_ALL=C wc -l) ))"
 680                 [ "${_refcnt:-0}" -eq 0 ] || return 1
 681         fi
 682         # last chance a detached HEAD (we ignore any linked working trees though)
 683         [ -s "$1/HEAD" ] && read -r _hr <"$1/HEAD" && [ -n "$_hr" ] || return 0
 684         [ "${_hr#*[!0-9a-f]}" != "$_hr" ] || [ "${_hr#*[!0]}" = "$_hr" ] || [ "${#_hr}" -lt 40 ] || return 1
 685         return 0
 686 }
 687
 688 # List all Git repositories, with given prefix if specified, one-per-line
 689 # All project names starting with _ are always excluded from the result
 690 get_repo_list() {
 691         if [ -n "$1" ]; then
 692                 LC_ALL=C cut -d : -f 1,3 "$cfg_chroot"/etc/group | LC_ALL=C grep "^$1"
 693         else
 694                 LC_ALL=C cut -d : -f 1,3 "$cfg_chroot"/etc/group
 695         fi |
 696         LC_ALL=C awk -F : 'substr($1,1,1) != "_" && $2 >= 65536 {print $1}'
 697 }
 698
 699 # set the variable named by the first argument to the project part (i.e. WITH
 700 # the trailing ".git" but WITHOUT the leading $cfg_reporoot) of the directory
 701 # specified by the second argument.
 702 # This function cannot be fooled by symbolic links.
 703 # If the second argument is omitted (or empty) use $(pwd -P) instead.
 704 # The directory specified by the second argument must exist.
 705 v_get_proj_from_dir() {
 706         [ -n "$2" ] || set -- "$1" "$(pwd -P)"
 707         [ -d "$2" ] || return 1
 708         case "$2" in
 709         "$cfg_reporoot/"?*)
 710                 # Simple case that does not need any fancy footwork
 711                 _projpart="${2#$cfg_reporoot/}"
 712                 ;;
 713         *)
 714                 _absrr="$(cd "$cfg_reporoot" && pwd -P)"
 715                 _abspd="$(cd "$2" && pwd -P)"
 716                 case "$_abspd" in
 717                 "$_absrr/"?*)
 718                         # The normal case
 719                         _projpart="${_abspd#$_absrr/}"
 720                         ;;
 721                 *)
 722                         # Must have been reached via a symbolic link
 723                         # Attempt to translate using the gitdir.list file
 724                         # If not found use a generic "_external" leader
 725                         # combined with just the trailing directory name
 726                         _projpart=
 727                         if
 728                                 [ -f "$cfg_projlist_cache_dir/gitdir.list" ] &&
 729                                 [ -s "$cfg_projlist_cache_dir/gitdir.list" ]
 730                         then
 731                                 _projpart="$(LC_ALL=C awk -v fnd="$_abspd" \
 732                                         <"$cfg_projlist_cache_dir/gitdir.list" \
 733                                         'NF>=2{p=$1; sub(/^[^ \t]+[ \t]+/,"");
 734                                         if ($0 == fnd) {print p ".git"; exit;}}')" || :
 735                         fi
 736                         if [ -z "$_projpart" ]; then
 737                                 _abspd="${_abspd%/}"
 738                                 _abspd="${_abspd%/.git}"
 739                                 _projpart="_external/${_abspd##*/}"
 740                         fi
 741                         ;;
 742                 esac
 743         esac
 744         case "$_projpart" in *[!/]".git/worktrees/"?*)
 745                 _projpart="${_projpart%.git/worktrees/*}.git"
 746         esac
 747         eval "$1="'"$_projpart"'
 748 }
 749
 750 # Returns success if "$1" does not exist or contains only blank lines and comments
 751 # The parsing rules are in Git's sha1-file.c parse_alt_odb_entry function;
 752 # the format for blank lines and comments has been the same since Git v0.99.5
 753 is_empty_alternates_file() {
 754         [ -n "$1" ] || return 0
 755         [ -e "$1" ] && [ -f "$1" ] && [ -s "$1" ] || return 0
 756         [ -r "$1" ] || return 1
 757         LC_ALL=C awk <"$1" '!/^$/ && !/^#/ {exit 1}'
 758 }
 759
 760 # Return success if the given project name has at least one immediate child fork
 761 # that has a non-empty alternates file
 762 has_forks_with_alternates() {
 763         _prj="${1%.git}"
 764         [ -n "$_prj" ] || return 1
 765         [ -d "$cfg_reporoot/$_prj" ] || return 1
 766         is_git_dir "$cfg_reporoot/$_prj.git" || return 1
 767         if
 768                 get_repo_list "$_prj/[^/:][^/:]*:" |
 769                 while read -r _prjname && [ -n "$_prjname" ]; do
 770                         is_empty_alternates_file "$cfg_reporoot/$_prjname.git/objects/info/alternates" ||
 771                         exit 1 # will only exit implicit subshell created by '|'
 772                 done
 773         then
 774                 return 1
 775         fi
 776         return 0
 777 }
 778
 779 # returns empty string and error for empty string otherwise one of
 780 #   m  =>  normal Git mirror
 781 #   s  =>  mirror from svn source
 782 #   d  =>  mirror from darcs source
 783 #   b  =>  mirror from bzr source
 784 #   h  =>  mirror from hg source
 785 #   w  =>  mirror from mediawiki source
 786 #   f  =>  mirror from other fast-import source
 787 # note that if the string is non-empty and none of s, d, b or h match the
 788 # return will always be type m regardless of whether it's a valid Git URL
 789 get_url_mirror_type() {
 790         case "$1" in
 791                 "")
 792                         return 1
 793                         ;;
 794                 svn://* | svn+http://* | svn+https://* | svn+file://* | svn+ssh://*)
 795                         echo 's'
 796                         ;;
 797                 darcs://* | darcs+http://* | darcs+https://*)
 798                         echo 'd'
 799                         ;;
 800                 bzr://*)
 801                         echo 'b'
 802                         ;;
 803                 hg+http://* | hg+https://* | hg+file://* | hg+ssh://* | hg::*)
 804                         echo 'h'
 805                         ;;
 806                 mediawiki::*)
 807                         echo 'w'
 808                         ;;
 809                 *)
 810                         echo 'm'
 811                         ;;
 812         esac
 813         return 0
 814 }
 815
 816 # returns false for empty string
 817 # returns true if the passed in url is a mirror using git fast-import
 818 is_gfi_mirror_url() {
 819         [ -n "$1" ] || return 1
 820         case "$(get_url_mirror_type "$1" 2>/dev/null || :)" in
 821                 d|b|h|w|f)
 822                         # darcs, bzr, hg and mediawiki mirrors use git fast-import
 823                         # and so do generic "f" fast-import mirrors
 824                         return 0
 825                         ;;
 826                 *)
 827                         # Don't think git-svn currently uses git fast-import
 828                         # And Git mirrors certainly do not
 829                         return 1
 830                         ;;
 831         esac
 832         # assume it does not use git fast-import
 833         return 1
 834 }
 835
 836 # returns false for empty string
 837 # returns true if the passed in url is a mirror using git-svn
 838 is_svn_mirror_url() {
 839         [ -n "$1" ] || return 1
 840         [ "$(get_url_mirror_type "$1" 2>/dev/null || :)" = "s" ]
 841 }
 842
 843 # returns mirror url for gitweb.baseurl of git directory
 844 # (GIT_DIR) passed in as the argument (which defaults to "." if omitted)
 845 # will fail if the directory does not have .nofetch and gitweb.baseurl
 846 # comes back empty -- otherwise .nofetch directories succeed with a "" return
 847 # automatically strips any leading "disabled " prefix before returning result
 848 get_mirror_url() {
 849         _gitdir="${1:-.}"
 850         # always return empty for non-mirrors
 851         ! [ -e "$_gitdir/.nofetch" ] || return 0
 852         _url="$(GIT_DIR="$_gitdir" config_get baseurl 2>/dev/null)" || :
 853         _url="${_url##* }"
 854         [ -n "$_url" ] || return 1
 855         printf '%s\n' "$_url"
 856         return 0
 857 }
 858
 859 # returns get_url_mirror_type for gitweb.baseurl of git directory
 860 # (GIT_DIR) passed in as the argument (which defaults to "." if omitted)
 861 # will fail if the directory does not have .nofetch and gitweb.baseurl
 862 # comes back empty -- otherwise .nofetch directories succeed with a "" return
 863 # automatically strips any leading "disabled " prefix before testing
 864 get_mirror_type() {
 865         _url="$(get_mirror_url "$@")" || return 1
 866         [ -n "$_url" ] || return 0
 867         get_url_mirror_type "$_url"
 868 }
 869
 870 # returns true if the passed in git dir (defaults to ".") is a mirror using git fast-import
 871 is_gfi_mirror() {
 872         _url="$(get_mirror_url "$@")" || return 1
 873         is_gfi_mirror_url "$_url"
 874 }
 875
 876 # returns true if the passed in git dir (defaults to ".") is a mirror using git-svn
 877 is_svn_mirror() {
 878         _url="$(get_mirror_url "$@")" || return 1
 879         is_svn_mirror_url "$_url"
 880 }
 881
 882 # current directory must already be set to Git repository
 883 # if girocco.headok is already true succeeds without doing anything
 884 # if rev-parse --verify HEAD succeeds sets headok=true and succeeds
 885 # otherwise tries to set HEAD to a symbolic ref to refs/heads/master
 886 # then refs/heads/trunk and finally the first top-level head from
 887 # refs/heads/* (i.e. only two slashes in the name) and finally any
 888 # existing refs/heads.  The first one to succeed wins and sets headok=true
 889 # and then a successful exit.  Otherwise headok is left unset with a failure exit
 890 # We use the girocco.headok flag to make sure we only force a valid HEAD symref
 891 # when the repository is being set up -- if the HEAD is later deleted (through
 892 # a push or fetch --prune) that's no longer our responsibility to fix
 893 check_and_set_head() {
 894         [ "$(git config --bool girocco.headok 2>/dev/null || :)" != "true" ] || return 0
 895         if git rev-parse --verify --quiet HEAD >/dev/null; then
 896                 git config --bool girocco.headok true
 897                 return 0
 898         fi
 899         for _hr in refs/heads/master refs/heads/trunk; do
 900                 if git rev-parse --verify --quiet "$_hr" >/dev/null; then
 901                         _update_head_symref "$_hr"
 902                         return 0
 903                 fi
 904         done
 905         git for-each-ref --format="%(refname)" refs/heads 2>/dev/null |
 906         while read -r _hr; do
 907                 case "${_hr#refs/heads/}" in */*) :;; *)
 908                         _update_head_symref "$_hr"
 909                         exit 1 # exit subshell created by "|"
 910                 esac
 911         done || return 0
 912         _hr="$(git for-each-ref --format="%(refname)" refs/heads 2>/dev/null | head -n 1)" || :
 913         if [ -n "$_hr" ]; then
 914                 _update_head_symref "$_hr"
 915                 return 0
 916         fi
 917         return 1
 918 }
 919 _update_head_symref() {
 920         git symbolic-ref HEAD "$1"
 921         git config --bool girocco.headok true
 922         ! [ -d htmlcache ] || { >htmlcache/changed; } 2>/dev/null || :
 923 }
 924
 925 # current directory must already be set to Git repository
 926 # if the directory needs to have gc run and .needsgc is not already set
 927 # then .needsgc will be set triggering a "mini" gc at the next opportunity
 928 # Girocco shouldn't generate any loose objects but we check for that anyway
 929 check_and_set_needsgc() {
 930         # If there's a .needspack file and ANY loose objects with a newer timestamp
 931         # then also set .needsgc otherwise remove it.  The only caller that may set
 932         # .needspack is a mirror therefore we don't have to worry about removing a
 933         # .needspack out from under a simultaneous creator.  We always do this and
 934         # do it first to try and avoid leaving a stale .needspack lying around.
 935         if [ -e .needspack ]; then
 936                 _objfiles=
 937                 _objfiles="$(( $(find -L objects/$octet -maxdepth 1 -newer .needspack -name "$octet19*" -type f -print 2>/dev/null |
 938                          head -n 1 | LC_ALL=C wc -l) +0 ))"
 939                 if [ "${_objfiles:-0}" = "0" ]; then
 940                         rm -f .needspack
 941                 else
 942                         [ -e .needsgc ] || >.needsgc
 943                 fi
 944         fi
 945         ! [ -e .needsgc ] || return 0
 946         _packs=
 947         { _packs="$(list_packs --quiet --count --exclude-no-idx --exclude-keep objects/pack || :)" || :; } 2>/dev/null
 948         if [ "${_packs:-0}" -ge 20 ]; then
 949                 >.needsgc
 950                 return 0
 951         fi
 952         _logfiles=
 953         { _logfiles="$(($(find -L reflogs -maxdepth 1 -type f -print | wc -l || :)+0))" || :; } 2>/dev/null
 954         if [ "${_logfiles:-0}" -ge 50 ]; then
 955                 >.needsgc
 956                 return 0
 957         fi
 958         # Truly git gc only checks the number of objects in the objects/17 directory
 959         # We check for -ge 10 which should make the probability of having more than
 960         # 5120 (20*256) loose objects present when there are less than 10 in
 961         # objects/17 vanishingly small (20 is the threshold we use for pack files)
 962         _objfiles=
 963         ! [ -d objects/17 ] ||
 964         { _objfiles="$(($(find -L objects/17 -type f -name "$octet19*" -print | wc -l || :)+0))" || :; } 2>/dev/null
 965         if [ "${_objfiles:-0}" -ge 10 ]; then
 966                 >.needsgc
 967                 return 0
 968         fi
 969 }
 970
 971 # current directory must already be set to Git repository
 972 # remove any existing stale .lock files anywhere in the refs hierarchy
 973 # mirror .lock files are considered "stale" after 60m whereas push projects
 974 # need 12h for a .lock file to be considered stale.
 975 clear_stale_ref_locks() {
 976         # Quick sanity check just in case
 977         [ -f HEAD ] && [ -s HEAD ] && [ -d objects ] && [ -d refs ] || return 1
 978         _stale=60
 979         [ ! -e .nofetch ] || _stale=720
 980         # Clear any stale top-level ref locks
 981         find . -maxdepth 1 -name '*?.lock' -type f -mmin +$_stale -exec rm -f '{}' + >/dev/null 2>&1 || :
 982         if [ -d worktrees ]; then
 983                 # Clear any worktrees stale top-level ref locks
 984                 find -H worktrees -mindepth 2 -maxdepth 2 -name '*?.lock' -type f -mmin +$_stale -exec rm -f '{}' + >/dev/null 2>&1 || :
 985         fi
 986         # Clear any stale ref locks within the refs hierarchy itself
 987         find -H refs -mindepth 1 -name '*?.lock' -type f -mmin +$_stale -exec rm -f '{}' + >/dev/null 2>&1 || :
 988         return 0
 989 }
 990
 991 # A well-known UTF-8 locale is required for some of the fast-import providers
 992 # in order to avoid mangling characters.  Ideally we could use "POSIX.UTF-8"
 993 # but that is not reliably UTF-8 but rather usually US-ASCII.
 994 # We parse the output of `locale -a` and select a suitable UTF-8 locale at
 995 # install time and store that in $var_utf8_locale if one is found.
 996 # If we cannot find one in the `locale -a` output then we just use a well-known
 997 # UTF-8 locale and hope for the best.  We set LC_ALL to our choice and export
 998 # it.  We only set this temporarily when running the fast-import providers.
 999 set_utf8_locale() {
1000         LC_ALL="${var_utf8_locale:-en_US.UTF-8}"
1001         export LC_ALL
1002 }
1003
1004 # hg-fast-export | git fast-import with error handling in current directory GIT_DIR
1005 git_hg_fetch() (
1006         set_utf8_locale
1007         _python="${PYTHON:-python}"
1008         rm -f hg2git-marks.old hg2git-marks.new
1009         if [ -f hg2git-marks ] && [ -s hg2git-marks ]; then
1010                 LC_ALL=C sed 's/^:\([^ ][^ ]*\) \([^ ][^ ]*\)$/\2 \1/' <hg2git-marks | {
1011                         if [ -n "$var_have_git_185" ]; then
1012                                 git cat-file --batch-check=':%(rest) %(objectname)'
1013                         else
1014                                 LC_ALL=C sed 's/^\([^ ][^ ]*\) \([^ ][^ ]*\)$/:\2 \1/'
1015                         fi
1016                 } | LC_ALL=C sed '/ missing$/d' >hg2git-marks.old
1017                 if [ -n "$var_have_git_171" ] &&
1018                    git rev-parse --quiet --verify refs/notes/hg >/dev/null; then
1019                         if [ -z "$var_have_git_185" ] ||
1020                            ! LC_ALL=C cmp -s hg2git-marks hg2git-marks.old; then
1021                                 _nm='hg-fast-export'
1022                                 GIT_AUTHOR_NAME="$_nm"
1023                                 GIT_COMMITTER_NAME="$_nm"
1024                                 GIT_AUTHOR_EMAIL="$_nm"
1025                                 GIT_COMMITTER_EMAIL="$_nm"
1026                                 export GIT_AUTHOR_NAME
1027                                 export GIT_COMMITTER_NAME
1028                                 export GIT_AUTHOR_EMAIL
1029                                 export GIT_COMMITTER_EMAIL
1030                                 git notes --ref=refs/notes/hg prune
1031                                 unset GIT_AUTHOR_NAME
1032                                 unset GIT_COMMITTER_NAME
1033                                 unset GIT_AUTHOR_EMAIL
1034                                 unset GIT_COMMITTER_EMAIL
1035                         fi
1036                 fi
1037         else
1038                 >hg2git-marks.old
1039         fi
1040         _err1=
1041         _err2=
1042         exec 3>&1
1043         { read -r _err1 || :; read -r _err2 || :; } <<-EOT
1044         $(
1045                 exec 4>&3 3>&1 1>&4 4>&-
1046                 {
1047                         _e1=0
1048                         _af="$(git config hg.authorsfile)" || :
1049                         _cmd='GIT_DIR="$(pwd)" "$_python" "$cfg_basedir/bin/hg-fast-export.py" \
1050                                 --repo    "$(pwd)/repo.hg" \
1051                                 --marks   "$(pwd)/hg2git-marks.old" \
1052                                 --mapping "$(pwd)/hg2git-mapping" \
1053                                 --heads   "$(pwd)/hg2git-heads" \
1054                                 --status  "$(pwd)/hg2git-state" \
1055                                 -U unknown --force --flatten --hg-hash'
1056                         [ -z "$_af" ] || _cmd="$_cmd"' --authors "$_af"'
1057                         eval "$_cmd" 3>&- || _e1=$?
1058                         echo $_e1 >&3
1059                 } |
1060                 {
1061                         _e2=0
1062                         git_ulimit fast-import \
1063                                 --import-marks="$(pwd)/hg2git-marks.old" \
1064                                 --export-marks="$(pwd)/hg2git-marks.new" \
1065                                 --export-pack-edges="$(pwd)/gfi-packs" \
1066                                 --force 3>&- || _e2=$?
1067                         echo $_e2 >&3
1068                 }
1069         )
1070         EOT
1071         exec 3>&-
1072         [ "$_err1" = 0 ] && [ "$_err2" = 0 ] || return 1
1073         mv -f hg2git-marks.new hg2git-marks
1074         rm -f hg2git-marks.old
1075         git for-each-ref --format='%(refname) %(objectname)' refs/heads |
1076         LC_ALL=C sed -e 's,^refs/heads/,:,' >hg2git-heads
1077 )