shlib.sh

   1 #!/bin/sh
   2 #
   3 # This is generic shell library for all the scripts used by Girocco;
   4 # most importantly, it introduces all the $cfg_* shell variables.
   5
   6 # SHA-1 patterns
   7 octet='[0-9a-f][0-9a-f]'
   8 octet4="$octet$octet$octet$octet"
   9 octet19="$octet4$octet4$octet4$octet4$octet$octet$octet"
  10 octet20="$octet4$octet4$octet4$octet4$octet4"
  11 nullsha="0000000000000000000000000000000000000000"
  12 # tab
  13 tab="$(printf '\t')"
  14
  15 # set a sane umask that never excludes any user or group permissions
  16 umask $(printf '0%03o' $(( $(umask) & ~0770 )) )
  17
  18 vcmp() {
  19         # Compare $1 to $2 each of which must match \d+(\.\d+)*
  20         # An empty string ('') for $1 or $2 is treated like 0
  21         # Outputs:
  22         #  -1 if $1 < $2
  23         #   0 if $1 = $2
  24         #   1 if $1 > $2
  25         # Note that `vcmp 1.8 1.8.0.0.0.0` correctly outputs 0.
  26         while
  27                 _a="${1%%.*}"
  28                 _b="${2%%.*}"
  29                 [ -n "$_a" -o -n "$_b" ]
  30         do
  31                 if [ "${_a:-0}" -lt "${_b:-0}" ]; then
  32                         echo -1
  33                         return
  34                 elif [ "${_a:-0}" -gt "${_b:-0}" ]; then
  35                         echo 1
  36                         return
  37                 fi
  38                 _a2="${1#$_a}"
  39                 _b2="${2#$_b}"
  40                 set -- "${_a2#.}" "${_b2#.}"
  41         done
  42         echo 0
  43 }
  44
  45 get_girocco_config_pm_var_list() {
  46         # Export all the variables from Girocco::Config to suitable var= lines
  47         # prefixing them with 'cfg_'. E.g. $cfg_admin is admin's mail address now
  48         # and also setting a 'defined_cfg_' prefix to 1 if they are not undef.
  49         __girocco_conf="$GIROCCO_CONF"
  50         [ -n "$__girocco_conf" ] || __girocco_conf="Girocco::Config"
  51         [ -z "$basedir" ] || __girocco_extrainc="-I$basedir"
  52         perl -I@basedir@ $__girocco_extrainc -M$__girocco_conf -le \
  53                 'foreach (sort {uc($a) cmp uc($b)} keys %Girocco::Config::) {
  54                         my $val = ${$Girocco::Config::{$_}}; defined($val) or $val="";
  55                         $val =~ s/([\\"\$\`])/\\$1/gos;
  56                         $val =~ s/(?:\r\n|\r|\n)$//os;
  57                         print "cfg_$_=\"$val\"";
  58                         print "defined_cfg_$_=",
  59                                 (defined(${$Girocco::Config::{$_}})?"1":"");
  60                 }'
  61 }
  62
  63 get_girocco_config_var_list() (
  64         # Same as get_girocco_config_pm_var_list except that
  65         # the following variables (all starting with var_) are added:
  66         # var_group             cfg_owning_group if defined otherwise `id -gn`
  67         # var_git_ver           The version number part from `git version`
  68         # var_git_exec_path     The result of $cfg_git_bin --exec-dir
  69         # var_perl_bin          Full path to the perl interpreter to use
  70         # var_have_git_171      Set to 1 if git version >= 1.7.1 otherwise ''
  71         # var_have_git_172      Set to 1 if git version >= 1.7.2 otherwise ''
  72         # var_have_git_173      Set to 1 if git version >= 1.7.3 otherwise ''
  73         # var_have_git_185      Set to 1 if git version >= 1.8.5 otherwise ''
  74         # var_window_memory     Value to use for repack --window-memory=
  75         # var_big_file_threshold Value to use for core.bigFileThreshold
  76         # var_redelta_threshold Recompute deltas if no more than this many objs
  77         # var_log_window_size   Value to use for git-svn --log-window-size=
  78         # var_utf8_locale       Value to use for a UTF-8 locale if available
  79         # var_xargs_r           A "-r" if xargs needs it to behave correctly
  80         # var_du_exclude        Option to exclude PATTERN from du if available
  81         # var_du_follow         Option to follow command line sym links if available
  82         _cfg_vars="$(get_girocco_config_pm_var_list)"
  83         eval "$_cfg_vars"
  84         printf '%s\n' "$_cfg_vars"
  85         printf 'var_group=%s\n' "${cfg_owning_group:-$(id -gn)}"
  86         _gver="$("$cfg_git_bin" version 2>/dev/null | \
  87                 LC_ALL=C sed -ne 's/^[^0-9]*\([0-9][0-9]*\(\.[0-9][0-9]*\)*\).*$/\1/p')"
  88         printf 'var_git_ver=%s\n' "$_gver"
  89         printf 'var_git_exec_path="%s"\n' "$("$cfg_git_bin" --exec-path 2>/dev/null)"
  90         printf 'var_perl_bin="%s"\n' "${cfg_perl_bin:-$(unset -f perl; command -v perl)}"
  91         printf 'var_have_git_171=%s\n' "$([ $(vcmp "$_gver" 1.7.1) -ge 0 ] && echo 1)"
  92         printf 'var_have_git_172=%s\n' "$([ $(vcmp "$_gver" 1.7.2) -ge 0 ] && echo 1)"
  93         printf 'var_have_git_173=%s\n' "$([ $(vcmp "$_gver" 1.7.3) -ge 0 ] && echo 1)"
  94         printf 'var_have_git_185=%s\n' "$([ $(vcmp "$_gver" 1.8.5) -ge 0 ] && echo 1)"
  95         __girocco_conf="$GIROCCO_CONF"
  96         [ -n "$__girocco_conf" ] || __girocco_conf="Girocco::Config"
  97         [ -z "$basedir" ] || __girocco_extrainc="-I$basedir"
  98         printf "var_window_memory=%s\n" \
  99                 "$(perl -I@basedir@ $__girocco_extrainc -M$__girocco_conf \
 100                 -MGirocco::Util -e 'print calc_windowmemory')"
 101         printf "var_big_file_threshold=%s\n" \
 102                 "$(perl -I@basedir@ $__girocco_extrainc -M$__girocco_conf \
 103                 -MGirocco::Util -e 'print calc_bigfilethreshold')"
 104         printf "var_redelta_threshold=%s\n" \
 105                 "$(perl -I@basedir@ $__girocco_extrainc -M$__girocco_conf \
 106                 -MGirocco::Util -e 'print calc_redeltathreshold')"
 107         printf 'var_log_window_size=%s\n' "${cfg_svn_log_window_size:-250}"
 108         # We parse the output of `locale -a` and select a suitable UTF-8 locale.
 109         _guess_locale="$(locale -a | LC_ALL=C grep -viE '^(posix|c)(\..*)?$' | \
 110                 LC_ALL=C grep -iE '\.utf-?8$' | LC_ALL=C sed -e 's/\.[Uu][Tt][Ff]-*8$//' | \
 111                 LC_ALL=C sed -e '/en_US/ s/^/0 /; /en_US/ !s/^/1 /' | LC_ALL=C sort | \
 112                 head -n 1 | LC_ALL=C cut -d ' ' -f 2)"
 113         [ -z "$_guess_locale" ] || printf 'var_utf8_locale=%s.UTF-8\n' "$_guess_locale"
 114         # On some broken platforms running xargs without -r and empty input runs the command
 115         printf 'var_xargs_r=%s\n' "$(: | command xargs echo -r)"
 116         # The disk usage report produces better numbers if du has an exclude option
 117         _x0="$(basename "$0")"
 118         _x0="${_x0%?}?*"
 119         for _duopt in --exclude -I; do
 120                 if _test="$(du $_duopt 's?lib.s*' $_duopt "$_x0" "$0" 2>/dev/null)" && [ -z "$_test" ]; then
 121                         printf 'var_du_exclude=%s\n' "$_duopt"
 122                         break
 123                 fi
 124         done
 125         if _test="$(du -H "$0" 2>/dev/null)" && [ -n "$_test" ]; then
 126                 printf 'var_du_follow=%s\n' "-H"
 127                 break
 128         fi
 129 )
 130
 131 # If basedir has been replaced, and shlib_vars.sh exists, get the config
 132 # definitions from it rather than running Perl.
 133 if [ "@basedir@" = '@'basedir'@' ] || ! [ -r "@basedir@/shlib_vars.sh" ]; then
 134         # Import all the variables from Girocco::Config to the local environment,
 135         eval "$(get_girocco_config_var_list)"
 136 else
 137         # Import the variables from shlib_vars.sh which avoids needlessly
 138         # running another copy of Perl
 139         . "@basedir@/shlib_vars.sh"
 140 fi
 141
 142 # git_add_config "some.var=value"
 143 # every ' in value must be replaced with the 4-character sequence '\'' before
 144 # calling this function or Git will barf.  Will not be effective unless running
 145 # Git version 1.7.3 or later.
 146 git_add_config() {
 147         GIT_CONFIG_PARAMETERS="${GIT_CONFIG_PARAMETERS:+$GIT_CONFIG_PARAMETERS }'$1'"
 148         export GIT_CONFIG_PARAMETERS
 149 }
 150
 151 # Make sure we have a reproducible environment by using a controlled HOME dir
 152 XDG_CONFIG_HOME="$cfg_chroot/var/empty"
 153 HOME="$cfg_chroot/etc/girocco"
 154 TMPDIR="/tmp"
 155 GIT_CONFIG_NOSYSTEM=1
 156 GIT_ATTR_NOSYSTEM=1
 157 GIT_NO_REPLACE_OBJECTS=1
 158 GIT_TERMINAL_PROMPT=0
 159 GIT_ASKPASS="$cfg_basedir/bin/git-askpass-password"
 160 export XDG_CONFIG_HOME
 161 export HOME
 162 export TMPDIR
 163 export GIT_CONFIG_NOSYSTEM
 164 export GIT_ATTR_NOSYSTEM
 165 export GIT_NO_REPLACE_OBJECTS
 166 export GIT_TERMINAL_PROMPT
 167 export GIT_ASKPASS
 168 unset GIT_USER_AGENT
 169 unset GIT_HTTP_USER_AGENT
 170 if [ -n "$defined_cfg_git_client_ua" ]; then
 171         GIT_USER_AGENT="$cfg_git_client_ua"
 172         export GIT_USER_AGENT
 173         GIT_HTTP_USER_AGENT="$cfg_git_client_ua"
 174         export GIT_HTTP_USER_AGENT
 175 fi
 176 unset GIT_CONFIG_PARAMETERS
 177 git_add_config "core.ignoreCase=false"
 178 [ -z "$var_big_file_threshold" ] ||
 179         git_add_config "core.bigFileThreshold=$var_big_file_threshold"
 180
 181 # We cannot use a git() {} or nc_openbsd() {} function to redirect git
 182 # and nc_openbsd to the desired executables because when using
 183 # "ENV_VAR=xxx func" the various /bin/sh implementations behave in various
 184 # different and unexpected ways:
 185 #   a) treat "ENV_VAR=xxx" like a separate, preceding "export ENV_VAR=xxx"
 186 #   b) treat "ENV_VAR=xxx" like a separate, prededing "ENV_VAR=xxx"
 187 #   c) treat "ENV_VAR=xxx" like a temporary setting only while running func
 188 # None of these are good.  We want a temporary "export ENV_VAR=xxx"
 189 # setting only while running func which none of the /bin/sh's do.
 190 #
 191 # Instead we'd like to use an alias that provides the desired behavior without
 192 # any of the bad (a), (b) or (c) effects.
 193 #
 194 # However, unfortunately, some of the crazy /bin/sh implementations do not
 195 # recognize alias expansions when preceded by variable assignments!
 196 #
 197 # So we are left with git() {} and nc_openbsd() {} functions and in the
 198 # case of git() {} we can compensate for (b) and (c) failing to export
 199 # but not (a) and (b) persisting the values so the caller will simply
 200 # have to beware and explicitly unset any variables that should not persist
 201 # beyond the function call itself.
 202
 203 git() (
 204         [ "${GIT_DIR+set}" = "set" ] && export GIT_DIR
 205         [ "${GIT_SSL_NO_VERIFY+set}" = "set" ] && export GIT_SSL_NO_VERIFY
 206         [ "${GIT_TRACE_PACKET+set}" = "set" ] && export GIT_TRACE_PACKET
 207         [ "${GIT_USER_AGENT+set}" = "set" ] && export GIT_USER_AGENT
 208         [ "${GIT_HTTP_USER_AGENT+set}" = "set" ] && export GIT_HTTP_USER_AGENT
 209         exec "$cfg_git_bin" "$@"
 210 )
 211
 212 # see comments for git() -- callers must explicitly export all variables
 213 # intended for the perl interpreter before using this function
 214 perl() { command "${var_perl_bin:-perl}" "$@"; }
 215
 216 nc_openbsd() { "$cfg_nc_openbsd_bin" "$@"; }
 217
 218 list_packs() { command "$cfg_basedir/bin/list_packs" "$@"; }
 219
 220 strftime() { command "$cfg_basedir/bin/strftime" "$@"; }
 221
 222 # Some platforms' broken xargs runs the command always at least once even if
 223 # there's no input unless given a special option.  Automatically supply the
 224 # option on those platforms by providing an xargs function.
 225 xargs() { command xargs $var_xargs_r "$@"; }
 226
 227 _addrlist() {
 228         _list=
 229         for _addr in "$@"; do
 230                 [ -z "$_list" ] || _list="$_list, "
 231                 _list="$_list$_addr"
 232         done
 233         echo "$_list"
 234 }
 235
 236 _sendmail() {
 237         _mailer="${cfg_sendmail_bin:-/usr/sbin/sendmail}"
 238         if [ -n "$cfg_sender" ]; then
 239                 "$_mailer" -i -f "$cfg_sender" "$@"
 240         else
 241                 "$_mailer" -i "$@"
 242         fi
 243 }
 244
 245 mail() {
 246         _subject=
 247         if [ "$1" = "-s" ]; then
 248                 shift
 249                 _subject="$1"
 250                 shift
 251         fi
 252         {
 253                 echo "From: \"$cfg_name\" ($cfg_title) <$cfg_admin>"
 254                 echo "To: $(_addrlist "$@")"
 255                 [ -z "$_subject" ] || echo "Subject: $_subject"
 256                 echo "MIME-Version: 1.0"
 257                 echo "Content-Type: text/plain; charset=utf-8"
 258                 echo "Content-Transfer-Encoding: 8bit"
 259                 [ -n "$cfg_suppress_x_girocco" ] || echo "X-Girocco: $cfg_gitweburl"
 260                 echo "Auto-Submitted: auto-generated"
 261                 echo ""
 262                 cat
 263         } | _sendmail "$@"
 264 }
 265
 266 # bang CMD... will execute the command with well-defined failure mode;
 267 # set bang_action to string of the failed action ('clone', 'update', ...);
 268 # pre-set bang_once=1 to make sure jobs banging on a repo repeatedly will
 269 # not spam the owner; re-define the bang_trap() function to do custom
 270 # cleanup before bailing out
 271 bang() {
 272         if [ -n "$show_progress" ]; then
 273                 exec 3>&1
 274                 errcode=
 275                 read -r errcode <<-EOT || :
 276                 $(
 277                         exec 4>&3 3>&1 1>&4 4>&-
 278                         { "$@" 3>&- || echo $? >&3; } 2>&1 | tee -a "$bang_log"
 279                 )
 280                 EOT
 281                 exec 3>&-
 282                 if [ -z "$errcode" ]; then
 283                         # All right. Cool.
 284                         return;
 285                 fi
 286         else
 287                 if "$@" >>"$bang_log" 2>&1; then
 288                         # All right. Cool.
 289                         return;
 290                 else
 291                         errcode="$?"
 292                 fi
 293         fi
 294         if ! [ -e .banged ] || [ -e .bangagain ]; then
 295                 rm -f .bangagain
 296                 bangmailok=true
 297                 ! [ -f HEAD -a -f config -a -d objects ] ||
 298                 bangmailok="$(GIT_DIR=. git config --bool gitweb.statusupdates 2>/dev/null || echo true)"
 299                 bangaddrs=''
 300                 [ "$bangmailok" = "false" -o -z "$mail" ] || bangaddrs="$mail"
 301                 [ -z "$cfg_admincc" -o "$cfg_admincc" = "0" -o -z "$cfg_admin" ] ||
 302                 if [ -z "$bangaddrs" ]; then bangaddrs="$cfg_admin"; else bangaddrs="$bangaddrs,$cfg_admin"; fi
 303                 [ -z "$bangaddrs" ] ||
 304                 {
 305                         echo "$* failed with error code $errcode"
 306                         echo ""
 307                         [ ! -n "$bang_once" ] || echo "you will not receive any more notifications until recovery"
 308                         echo "this status message may be disabled on the project admin page"
 309                         echo ""
 310                         echo "Log follows:"
 311                         echo ""
 312                         cat "$bang_log"
 313                 } | mail -s "[$cfg_name] $proj $bang_action failed" "$bangaddrs"
 314         fi
 315         touch .banged
 316         cat "$bang_log" > .banglog
 317         bang_trap
 318         exit 1
 319 }
 320
 321 # bang_eval CMD... will evaluate the command with well-defined failure mode;
 322 # Identical to bang CMD... except the command is eval'd instead of executed.
 323 bang_eval() {
 324         bang eval "$*"
 325 }
 326
 327 # Default bang settings:
 328 bang_setup() {
 329         bang_action="lame_programmer"
 330         bang_once=
 331         bang_trap() { :; }
 332         bang_log="$(mktemp -t repomgr-XXXXXX)"
 333         trap 'rm -f "$bang_log"' EXIT
 334         trap 'exit 130' INT
 335         trap 'exit 143' TERM
 336 }
 337
 338 # Remove banged status
 339 bang_reset() {
 340         rm -f .banged .bangagain .banglog
 341 }
 342
 343 # Check to see if banged status
 344 is_banged() {
 345         [ -e .banged ]
 346 }
 347
 348
 349 # Progress report - if show_progress is set, shows the given message.
 350 progress() {
 351         [ ! -n "$show_progress" ] || echo "$@"
 352 }
 353
 354
 355 # Project config accessors; must be run in project directory
 356 config_get() {
 357         git config "gitweb.$1"
 358 }
 359
 360 config_set() {
 361         git config "gitweb.$1" "$2" && chgrp $var_group config && chmod g+w config
 362 }
 363
 364 config_set_raw() {
 365         git config "$1" "$2"        && chgrp $var_group config && chmod g+w config
 366 }
 367
 368 config_get_date_seconds() {
 369         _dt="$(config_get "$1" || :)"
 370         [ -n "$_dt" ] || return 1
 371         _ds="$(perl -I@basedir@ -MGirocco::Util -e "print parse_rfc2822_date('$_dt')")"
 372         [ -n "$_ds" ] || return 1
 373         echo "$_ds"
 374 }
 375
 376 # Tool for checking whether given number of seconds has not passed yet
 377 check_interval() {
 378         os="$(config_get_date_seconds "$1")" || return 1
 379         ns="$(date +%s)"
 380         [ $ns -lt $(($os+$2)) ]
 381 }
 382
 383 # Check if we are running with effective root permissions
 384 is_root() {
 385         [ "$(id -u 2>/dev/null)" = "0" ]
 386 }
 387
 388 # Check to see if the single argument is a Git directory
 389 is_git_dir() {
 390         # Just like Git's test except we ignore GIT_OBJECT_DIRECTORY
 391         # And we are slightly more picky (must be refs/.+ not refs/.*)
 392         [ -d "$1/objects" -a -x "$1/objects" ] || return 1
 393         [ -d "$1/refs" -a -x "$1/refs" ] || return 1
 394         if [ -L "$1/HEAD" ]; then
 395                 _hr="$(readlink "$1/HEAD")"
 396                 case "$_hr" in "refs/"?*) :;; *) return 1;; esac
 397         fi
 398         [ -f "$1/HEAD" -a -r "$1/HEAD" ] || return 1
 399         read -r _hr <"$1/HEAD" || return 1
 400         case "$_hr" in
 401                 $octet20)
 402                         return 0;;
 403                 ref:*)
 404                         _hr="${_hr##ref:*[ $tab]}"
 405                         case "$_hr" in "refs/"?*) return 0;; esac
 406         esac
 407         return 1
 408 }
 409
 410 # List all Git repositories, with given prefix if specified, one-per-line
 411 # All project names starting with _ are always excluded from the result
 412 get_repo_list() {
 413         if [ -n "$1" ]; then
 414                 LC_ALL=C cut -d : -f 1,3 "$cfg_chroot"/etc/group | LC_ALL=C grep "^$1"
 415         else
 416                 LC_ALL=C cut -d : -f 1,3 "$cfg_chroot"/etc/group
 417         fi | while IFS=: read name id; do
 418                 [ $id -lt 65536 ] || case "$name" in _*) :;; ?*) echo "$name"; esac
 419         done
 420 }
 421
 422 # Return success if the given project name has any forks
 423 has_forks() {
 424         _prj="${1%.git}"
 425         [ -n "$_prj" ] || return 1
 426         [ -d "$cfg_reporoot/$_prj" ] || return 1
 427         is_git_dir "$cfg_reporoot/$_prj.git" || return 1
 428         test $(get_repo_list "$_prj/[^/][^/]*:" | LC_ALL=C wc -l) -gt 0
 429 }
 430
 431 # returns empty string and error for empty string otherwise one of
 432 #   m  =>  normal Git mirror
 433 #   s  =>  mirror from svn source
 434 #   d  =>  mirror from darcs source
 435 #   b  =>  mirror from bzr source
 436 #   h  =>  mirror from hg source
 437 #   w  =>  mirror from mediawiki source
 438 #   f  =>  mirror from other fast-import source
 439 # note that if the string is non-empty and none of s, d, b or h match the
 440 # return will always be type m regardless of whether it's a valid Git URL
 441 get_url_mirror_type() {
 442         case "$1" in
 443                 "")
 444                         return 1
 445                         ;;
 446                 svn://* | svn+http://* | svn+https://* | svn+file://* | svn+ssh://*)
 447                         echo 's'
 448                         ;;
 449                 darcs://*)
 450                         echo 'd'
 451                         ;;
 452                 bzr://*)
 453                         echo 'b'
 454                         ;;
 455                 hg+http://* | hg+https://* | hg+file://* | hg+ssh://* | hg::*)
 456                         echo 'h'
 457                         ;;
 458                 mediawiki::*)
 459                         echo 'w'
 460                         ;;
 461                 *)
 462                         echo 'm'
 463                         ;;
 464         esac
 465         return 0
 466 }
 467
 468 # returns false for empty string
 469 # returns true if the passed in url is a mirror using git fast-import
 470 is_gfi_mirror_url() {
 471         [ -n "$1" ] || return 1
 472         case "$(get_url_mirror_type "$1" 2>/dev/null || :)" in
 473                 d|b|h|w|f)
 474                         # darcs, bzr, hg and mediawiki mirrors use git fast-import
 475                         # and so do generic "f" fast-import mirrors
 476                         return 0
 477                         ;;
 478                 *)
 479                         # Don't think git-svn currently uses git fast-import
 480                         # And Git mirrors certainly do not
 481                         return 1
 482                         ;;
 483         esac
 484         # assume it does not use git fast-import
 485         return 1
 486 }
 487
 488 # returns mirror url for gitweb.baseurl of git directory
 489 # (GIT_DIR) passed in as the argument (which defaults to "." if omitted)
 490 # will fail if the directory does not have .nofetch and gitweb.baseurl
 491 # comes back empty -- otherwise .nofetch directories succeed with a "" return
 492 # automatically strips any leading "disabled " prefix before returning result
 493 get_mirror_url() {
 494         _gitdir="${1:-.}"
 495         # always return empty for non-mirrors
 496         [ ! -e "$_gitdir/.nofetch" ] || return 0
 497         _url="$(GIT_DIR="$_gitdir" config_get baseurl 2>/dev/null || :)"
 498         _url="${_url##* }"
 499         [ -n "$_url" ] || return 1
 500         printf '%s\n' "$_url"
 501         return 0
 502 }
 503
 504 # returns get_url_mirror_type for gitweb.baseurl of git directory
 505 # (GIT_DIR) passed in as the argument (which defaults to "." if omitted)
 506 # will fail if the directory does not have .nofetch and gitweb.baseurl
 507 # comes back empty -- otherwise .nofetch directories succeed with a "" return
 508 # automatically strips any leading "disabled " prefix before testing
 509 get_mirror_type() {
 510         _url="$(get_mirror_url "$@")" || return 1
 511         get_url_mirror_type "$_url"
 512 }
 513
 514 # returns true if the passed in git dir (defaults to ".") is a mirror using git fast-import
 515 is_gfi_mirror() {
 516         _url="$(get_mirror_url "$@")" || return 1
 517         is_gfi_mirror_url "$_url"
 518 }
 519
 520 # returns true if the passed in git dir (defaults to ".") is a mirror using git-svn
 521 is_svn_mirror() {
 522         [ "$(get_mirror_type "$1" 2>/dev/null || :)" = "s" ]
 523 }
 524
 525 # A well-known UTF-8 locale is required for some of the fast-import providers
 526 # in order to avoid mangling characters.  Ideally we could use "POSIX.UTF-8"
 527 # but that is not reliably UTF-8 but rather usually US-ASCII.
 528 # We parse the output of `locale -a` and select a suitable UTF-8 locale at
 529 # install time and store that in $var_utf8_locale if one is found.
 530 # If we cannot find one in the `locale -a` output then we just use a well-known
 531 # UTF-8 locale and hope for the best.  We set LC_ALL to our choice and export
 532 # it.  We only set this temporarily when running the fast-import providers.
 533 set_utf8_locale() {
 534         LC_ALL="${var_utf8_locale:-en_US.UTF-8}"
 535         export LC_ALL
 536 }
 537
 538 # hg-fast-export | git fast-import with error handling in current directory GIT_DIR
 539 git_hg_fetch() (
 540         set_utf8_locale
 541         _python="${PYTHON:-python}"
 542         rm -f hg2git-marks.old hg2git-marks.new
 543         if [ -f hg2git-marks -a -s hg2git-marks ]; then
 544                 LC_ALL=C sed 's/^:\([^ ][^ ]*\) \([^ ][^ ]*\)$/\2 \1/' <hg2git-marks | {
 545                         if [ -n "$var_have_git_185" ]; then
 546                                 git cat-file --batch-check=':%(rest) %(objectname)'
 547                         else
 548                                 LC_ALL=C sed 's/^\([^ ][^ ]*\) \([^ ][^ ]*\)$/:\2 \1/'
 549                         fi
 550                 } | LC_ALL=C sed '/ missing$/d' >hg2git-marks.old
 551                 if [ -n "$var_have_git_171" ] && \
 552                    git rev-parse --quiet --verify refs/notes/hg >/dev/null; then
 553                         if [ -z "$var_have_git_185" ] || \
 554                            ! LC_ALL=C cmp -s hg2git-marks hg2git-marks.old; then
 555                                 _nm='hg-fast-export'
 556                                 GIT_AUTHOR_NAME="$_nm"
 557                                 GIT_COMMITTER_NAME="$_nm"
 558                                 GIT_AUTHOR_EMAIL="$_nm"
 559                                 GIT_COMMITTER_EMAIL="$_nm"
 560                                 export GIT_AUTHOR_NAME
 561                                 export GIT_COMMITTER_NAME
 562                                 export GIT_AUTHOR_EMAIL
 563                                 export GIT_COMMITTER_EMAIL
 564                                 git notes --ref=refs/notes/hg prune
 565                                 unset GIT_AUTHOR_NAME
 566                                 unset GIT_COMMITTER_NAME
 567                                 unset GIT_AUTHOR_EMAIL
 568                                 unset GIT_COMMITTER_EMAIL
 569                         fi
 570                 fi
 571         else
 572                 >hg2git-marks.old
 573         fi
 574         _err1=
 575         _err2=
 576         exec 3>&1
 577         { read -r _err1 || :; read -r _err2 || :; } <<-EOT
 578         $(
 579                 exec 4>&3 3>&1 1>&4 4>&-
 580                 {
 581                         _e1=0
 582                         _af="$(git config hg.authorsfile || :)"
 583                         _cmd='GIT_DIR="$(pwd)" "$_python" "$cfg_basedir/bin/hg-fast-export.py" \
 584                                 --repo    "$(pwd)/repo.hg" \
 585                                 --marks   "$(pwd)/hg2git-marks.old" \
 586                                 --mapping "$(pwd)/hg2git-mapping" \
 587                                 --heads   "$(pwd)/hg2git-heads" \
 588                                 --status  "$(pwd)/hg2git-state" \
 589                                 -U unknown --force --flatten --hg-hash'
 590                         [ -z "$_af" ] || _cmd="$_cmd"' --authors "$_af"'
 591                         eval "$_cmd" 3>&- || _e1=$?
 592                         echo $_e1 >&3
 593                 } | \
 594                 {
 595                         _e2=0
 596                         git fast-import \
 597                                 --import-marks="$(pwd)/hg2git-marks.old" \
 598                                 --export-marks="$(pwd)/hg2git-marks.new" \
 599                                 --export-pack-edges="$(pwd)/gfi-packs" \
 600                                 --force 3>&- || _e2=$?
 601                         echo $_e2 >&3
 602                 }
 603         )
 604         EOT
 605         exec 3>&-
 606         [ "$_err1" = 0 -a "$_err2" = 0 ] || return 1
 607         mv -f hg2git-marks.new hg2git-marks
 608         rm -f hg2git-marks.old
 609         git for-each-ref --format='%(refname) %(objectname)' refs/heads | \
 610         LC_ALL=C sed -e 's,^refs/heads/,:,' >hg2git-heads
 611 )