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