taskd/mail.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2007 Andy Parkins
   4 #
   5 # An example hook script to mail out commit update information.  This hook
   6 # sends emails listing new revisions to the repository introduced by the
   7 # change being reported.  The rule is that (for branch updates) each commit
   8 # will appear on one email and one email only.
   9 #
  10 # =================
  11 # This is Girocco-customized version. No matter what is said below, it has
  12 # following changes:
  13 # * Calling with arguments is same as giving them on stdin.
  14 # * Optional fourth parameter is project name, used at most places instead
  15 #   of description.
  16 # * Optional fifth parameter is email sender.
  17 # * Load shlib.
  18 # * Default subject prefix is site name.
  19 # * Unsubscribe instructions in email footer.
  20 # * Default showrev includes gitweb link and show -C.
  21 # * Nicer subject line.
  22 # * Limit mail size to 256kb.
  23 # =================
  24 #
  25 # This hook is stored in the contrib/hooks directory.  Your distribution
  26 # will have put this somewhere standard.  You should make this script
  27 # executable then link to it in the repository you would like to use it in.
  28 # For example, on debian the hook is stored in
  29 # /usr/share/git-core/contrib/hooks/post-receive-email:
  30 #
  31 #  chmod a+x post-receive-email
  32 #  cd /path/to/your/repository.git
  33 #  ln -sf /usr/share/git-core/contrib/hooks/post-receive-email hooks/post-receive
  34 #
  35 # This hook script assumes it is enabled on the central repository of a
  36 # project, with all users pushing only to it and not between each other.  It
  37 # will still work if you don't operate in that style, but it would become
  38 # possible for the email to be from someone other than the person doing the
  39 # push.
  40 #
  41 # Config
  42 # ------
  43 # hooks.mailinglist
  44 #   This is the list that all pushes will go to; leave it blank to not send
  45 #   emails for every ref update.
  46 # hooks.announcelist
  47 #   This is the list that all pushes of annotated tags will go to.  Leave it
  48 #   blank to default to the mailinglist field.  The announce emails lists
  49 #   the short log summary of the changes since the last annotated tag.
  50 # hooks.envelopesender
  51 #   If set then the -f option is passed to sendmail to allow the envelope
  52 #   sender address to be set
  53 # hooks.emailprefix
  54 #   All emails have their subjects prefixed with this prefix, or "[SCM]"
  55 #   if emailprefix is unset, to aid filtering
  56 # hooks.showrev
  57 #   The shell command used to format each revision in the email, with
  58 #   "%s" replaced with the commit id.  Defaults to "git rev-list -1
  59 #   --pretty %s", displaying the commit id, author, date and log
  60 #   message.  To list full patches separated by a blank line, you
  61 #   could set this to "git show -C %s; echo".
  62 #   To list a gitweb/cgit URL *and* a full patch for each change set, use this:
  63 #     "t=%s; printf 'http://.../?id=%%s' \$t; echo;echo; git show -C \$t; echo"
  64 #   Be careful if "..." contains things that will be expanded by shell "eval"
  65 #   or printf.
  66 #
  67 # Notes
  68 # -----
  69 # All emails include the headers "X-Git-Refname", "X-Git-Oldrev",
  70 # "X-Git-Newrev", and "X-Git-Reftype" to enable fine tuned filtering and
  71 # give information for debugging.
  72 #
  73
  74 # ---------------------------- Functions
  75
  76 #
  77 # Function to prepare for email generation. This decides what type
  78 # of update this is and whether an email should even be generated.
  79 #
  80 prep_for_email()
  81 {
  82         # --- Arguments
  83         oldrev=$(git rev-parse $1)
  84         newrev=$(git rev-parse $2)
  85         refname="$3"
  86
  87         # --- Interpret
  88         # 0000->1234 (create)
  89         # 1234->2345 (update)
  90         # 2345->0000 (delete)
  91         if expr "$oldrev" : '0*$' >/dev/null
  92         then
  93                 change_type="create"
  94         else
  95                 if expr "$newrev" : '0*$' >/dev/null
  96                 then
  97                         change_type="delete"
  98                 else
  99                         change_type="update"
 100                 fi
 101         fi
 102
 103         # --- Get the revision types
 104         newrev_type=$(git cat-file -t $newrev 2> /dev/null)
 105         oldrev_type=$(git cat-file -t "$oldrev" 2> /dev/null)
 106         case "$change_type" in
 107         create|update)
 108                 rev="$newrev"
 109                 rev_type="$newrev_type"
 110                 ;;
 111         delete)
 112                 rev="$oldrev"
 113                 rev_type="$oldrev_type"
 114                 ;;
 115         esac
 116
 117         # The revision type tells us what type the commit is, combined with
 118         # the location of the ref we can decide between
 119         #  - working branch
 120         #  - tracking branch
 121         #  - unannoted tag
 122         #  - annotated tag
 123         case "$refname","$rev_type" in
 124                 refs/tags/*,commit)
 125                         # un-annotated tag
 126                         refname_type="tag"
 127                         short_refname=${refname##refs/tags/}
 128                         ;;
 129                 refs/tags/*,tag)
 130                         # annotated tag
 131                         refname_type="annotated tag"
 132                         short_refname=${refname##refs/tags/}
 133                         # change recipients
 134                         if [ -n "$announcerecipients" ]; then
 135                                 recipients="$announcerecipients"
 136                         fi
 137                         ;;
 138                 refs/heads/*,commit)
 139                         # branch
 140                         refname_type="branch"
 141                         short_refname=${refname##refs/heads/}
 142                         ;;
 143                 refs/remotes/*,commit)
 144                         # tracking branch
 145                         refname_type="tracking branch"
 146                         short_refname=${refname##refs/remotes/}
 147                         echo >&2 "*** Push-update of tracking branch, $refname"
 148                         echo >&2 "***  - no email generated."
 149                         echo ""
 150                         return 1
 151                         ;;
 152                 refs/mob/*,commit|refs/mob/*,tag)
 153                         # personal mob ref
 154                         refname_type="personal mob ref"
 155                         short_refname=${refname##refs/mob/}
 156                         echo >&2 "*** Push-update of personal mob ref, $refname"
 157                         echo >&2 "***  - no email generated."
 158                         echo ""
 159                         return 1
 160                         ;;
 161                 *)
 162                         # Anything else (is there anything else?)
 163                         echo >&2 "*** Unknown type of update to $refname ($rev_type)"
 164                         echo >&2 "***  - no email generated"
 165                         echo ""
 166                         return 1
 167                         ;;
 168         esac
 169
 170         # Check if we've got anyone to send to
 171         if [ -z "$recipients" ]; then
 172                 case "$refname_type" in
 173                         "annotated tag")
 174                                 config_name="hooks.announcelist"
 175                                 ;;
 176                         *)
 177                                 config_name="hooks.mailinglist"
 178                                 ;;
 179                 esac
 180                 echo >&2 "*** $config_name is not set so no email will be sent"
 181                 echo >&2 "*** for $refname update $oldrev->$newrev"
 182                 echo ""
 183                 return 1
 184         fi
 185
 186         return 0
 187 }
 188
 189 #
 190 # Top level email generation function.  This calls the appropriate
 191 # body-generation routine after outputting the common header.
 192 #
 193 # Note this function doesn't actually generate any email output, that is
 194 # taken care of by the functions it calls:
 195 #  - generate_email_header
 196 #  - generate_create_XXXX_email
 197 #  - generate_update_XXXX_email
 198 #  - generate_delete_XXXX_email
 199 #  - generate_email_footer
 200 #
 201 # Note also that this function cannot 'exit' from the script; when this
 202 # function is running (in hook script mode), the send_mail() function
 203 # is already executing in another process, connected via a pipe, and
 204 # if this function exits without, whatever has been generated to that
 205 # point will be sent as an email... even if nothing has been generated.
 206 #
 207 generate_email()
 208 {
 209         # Email parameters
 210         # The email subject will contain the best description of the ref
 211         # that we can build from the parameters
 212         describe=$(git describe $rev 2>/dev/null)
 213         if [ -z "$describe" ]; then
 214                 describe=$rev
 215         fi
 216
 217         generate_email_header
 218
 219         # Call the correct body generation function
 220         fn_name=general
 221         case "$refname_type" in
 222         "tracking branch"|branch)
 223                 fn_name=branch
 224                 ;;
 225         "annotated tag")
 226                 fn_name=atag
 227                 ;;
 228         esac
 229         generate_${change_type}_${fn_name}_email
 230
 231         generate_email_footer
 232 }
 233
 234 generate_email_header()
 235 {
 236         # --- Email (all stdout will be the email)
 237         # Generate header
 238         if [ -n "$emailsender" ]; then
 239                 echo "From: $emailsender"
 240         fi
 241         cat <<-EOF
 242         To: $recipients
 243         Subject: ${emailprefix}$projectname $refname_type $short_refname ${change_type}d: $describe
 244         MIME-Version: 1.0
 245         Content-Type: text/plain; charset=utf-8
 246         Content-Transfer-Encoding: 8bit
 247         EOF
 248         [ -z "$emailextraheader" ] || echo "$emailextraheader"
 249         cat <<-EOF
 250         X-Git-Refname: $refname
 251         X-Git-Reftype: $refname_type
 252         X-Git-Oldrev: $oldrev
 253         X-Git-Newrev: $newrev
 254         Auto-Submitted: auto-generated
 255
 256         This is an automated email from the git hooks/post-receive script. It was
 257         generated because a ref change was pushed to the repository containing
 258         the project $projectname.
 259
 260         The $refname_type, $short_refname has been ${change_type}d
 261         EOF
 262 }
 263
 264 generate_email_footer()
 265 {
 266         SPACE=" "
 267         cat <<-EOF
 268
 269
 270         $cfg_name automatic notification. Contact project admin $projectowner
 271         if you want to unsubscribe, or site admin $cfg_admin if you receive
 272         no reply.
 273         --${SPACE}
 274         $projectboth
 275         EOF
 276 }
 277
 278 # --------------- Branches
 279
 280 #
 281 # Called for the creation of a branch
 282 #
 283 generate_create_branch_email()
 284 {
 285         # This is a new branch and so oldrev is not valid
 286         echo "        at  $newrev ($newrev_type)"
 287         echo ""
 288
 289         echo $LOGBEGIN
 290         show_new_revisions
 291         echo $LOGEND
 292 }
 293
 294 #
 295 # Called for the change of a pre-existing branch
 296 #
 297 generate_update_branch_email()
 298 {
 299         # Consider this:
 300         #   1 --- 2 --- O --- X --- 3 --- 4 --- N
 301         #
 302         # O is $oldrev for $refname
 303         # N is $newrev for $refname
 304         # X is a revision pointed to by some other ref, for which we may
 305         #   assume that an email has already been generated.
 306         # In this case we want to issue an email containing only revisions
 307         # 3, 4, and N.  Given (almost) by
 308         #
 309         #  git rev-list N ^O --not --all
 310         #
 311         # The reason for the "almost", is that the "--not --all" will take
 312         # precedence over the "N", and effectively will translate to
 313         #
 314         #  git rev-list N ^O ^X ^N
 315         #
 316         # So, we need to build up the list more carefully.  git rev-parse
 317         # will generate a list of revs that may be fed into git rev-list.
 318         # We can get it to make the "--not --all" part and then filter out
 319         # the "^N" with:
 320         #
 321         #  git rev-parse --not --all | grep -v N
 322         #
 323         # Then, using the --stdin switch to git rev-list we have effectively
 324         # manufactured
 325         #
 326         #  git rev-list N ^O ^X
 327         #
 328         # This leaves a problem when someone else updates the repository
 329         # while this script is running.  Their new value of the ref we're
 330         # working on would be included in the "--not --all" output; and as
 331         # our $newrev would be an ancestor of that commit, it would exclude
 332         # all of our commits.  What we really want is to exclude the current
 333         # value of $refname from the --not list, rather than N itself.  So:
 334         #
 335         #  git rev-parse --not --all | grep -v $(git rev-parse $refname)
 336         #
 337         # Get's us to something pretty safe (apart from the small time
 338         # between refname being read, and git rev-parse running - for that,
 339         # I give up)
 340         #
 341         #
 342         # Next problem, consider this:
 343         #   * --- B --- * --- O ($oldrev)
 344         #          \
 345         #           * --- X --- * --- N ($newrev)
 346         #
 347         # That is to say, there is no guarantee that oldrev is a strict
 348         # subset of newrev (it would have required a --force, but that's
 349         # allowed).  So, we can't simply say rev-list $oldrev..$newrev.
 350         # Instead we find the common base of the two revs and list from
 351         # there.
 352         #
 353         # As above, we need to take into account the presence of X; if
 354         # another branch is already in the repository and points at some of
 355         # the revisions that we are about to output - we don't want them.
 356         # The solution is as before: git rev-parse output filtered.
 357         #
 358         # Finally, tags: 1 --- 2 --- O --- T --- 3 --- 4 --- N
 359         #
 360         # Tags pushed into the repository generate nice shortlog emails that
 361         # summarise the commits between them and the previous tag.  However,
 362         # those emails don't include the full commit messages that we output
 363         # for a branch update.  Therefore we still want to output revisions
 364         # that have been output on a tag email.
 365         #
 366         # Luckily, git rev-parse includes just the tool.  Instead of using
 367         # "--all" we use "--branches"; this has the added benefit that
 368         # "remotes/" will be ignored as well.
 369
 370         # List all of the revisions that were removed by this update, in a
 371         # fast-forward update, this list will be empty, because rev-list O
 372         # ^N is empty.  For a non-fast-forward, O ^N is the list of removed
 373         # revisions
 374         fast_forward=""
 375         rev=""
 376         for rev in $(git rev-list $newrev..$oldrev)
 377         do
 378                 revtype=$(git cat-file -t "$rev")
 379                 echo "  discards  $rev ($revtype)"
 380         done
 381         if [ -z "$rev" ]; then
 382                 fast_forward=1
 383         fi
 384
 385         # List all the revisions from baserev to newrev in a kind of
 386         # "table-of-contents"; note this list can include revisions that
 387         # have already had notification emails and is present to show the
 388         # full detail of the change from rolling back the old revision to
 389         # the base revision and then forward to the new revision
 390         for rev in $(git rev-list $oldrev..$newrev)
 391         do
 392                 revtype=$(git cat-file -t "$rev")
 393                 echo "       via  $rev ($revtype)"
 394         done
 395
 396         if [ "$fast_forward" ]; then
 397                 echo "      from  $oldrev ($oldrev_type)"
 398         else
 399                 #  1. Existing revisions were removed.  In this case newrev
 400                 #     is a subset of oldrev - this is the reverse of a
 401                 #     fast-forward, a rewind
 402                 #  2. New revisions were added on top of an old revision,
 403                 #     this is a rewind and addition.
 404
 405                 # (1) certainly happened, (2) possibly.  When (2) hasn't
 406                 # happened, we set a flag to indicate that no log printout
 407                 # is required.
 408
 409                 echo ""
 410
 411                 # Find the common ancestor of the old and new revisions and
 412                 # compare it with newrev
 413                 baserev=$(git merge-base $oldrev $newrev)
 414                 rewind_only=""
 415                 if [ "$baserev" = "$newrev" ]; then
 416                         echo "This update discarded existing revisions and left the branch pointing at"
 417                         echo "a previous point in the repository history."
 418                         echo ""
 419                         echo " * -- * -- N ($newrev)"
 420                         echo "            \\"
 421                         echo "             O -- O -- O ($oldrev)"
 422                         echo ""
 423                         echo "The removed revisions are not necessarily gone - if another reference"
 424                         echo "still refers to them they will stay in the repository."
 425                         rewind_only=1
 426                 else
 427                         echo "This update added new revisions after undoing existing revisions.  That is"
 428                         echo "to say, the old revision is not a strict subset of the new revision.  This"
 429                         echo "situation occurs when you --force push a change and generate a repository"
 430                         echo "containing something like this:"
 431                         echo ""
 432                         echo " * -- * -- B -- O -- O -- O ($oldrev)"
 433                         echo "            \\"
 434                         echo "             N -- N -- N ($newrev)"
 435                         echo ""
 436                         echo "When this happens we assume that you've already had alert emails for all"
 437                         echo "of the O revisions, and so we here report only the revisions in the N"
 438                         echo "branch from the common base, B."
 439                 fi
 440         fi
 441
 442         echo ""
 443         if [ -z "$rewind_only" ]; then
 444                 echo "Those revisions listed above that are new to this repository have"
 445                 echo "not appeared on any other notification email; so we list those"
 446                 echo "revisions in full, below."
 447
 448                 echo ""
 449                 echo $LOGBEGIN
 450                 show_new_revisions
 451
 452                 # XXX: Need a way of detecting whether git rev-list actually
 453                 # outputted anything, so that we can issue a "no new
 454                 # revisions added by this update" message
 455
 456                 echo $LOGEND
 457         else
 458                 echo "No new revisions were added by this update."
 459         fi
 460
 461         # The diffstat is shown from the old revision to the new revision.
 462         # This is to show the truth of what happened in this change.
 463         # There's no point showing the stat from the base to the new
 464         # revision because the base is effectively a random revision at this
 465         # point - the user will be interested in what this revision changed
 466         # - including the undoing of previous revisions in the case of
 467         # non-fast-forward updates.
 468         echo ""
 469         echo "Summary of changes:"
 470         git diff-tree --no-color --stat --summary --find-copies-harder $oldrev..$newrev
 471 }
 472
 473 #
 474 # Called for the deletion of a branch
 475 #
 476 generate_delete_branch_email()
 477 {
 478         echo "       was  $oldrev"
 479         echo ""
 480         echo $LOGBEGIN
 481         git diff-tree --no-color -s --always --encoding=UTF-8 --pretty=oneline $oldrev
 482         echo $LOGEND
 483 }
 484
 485 # --------------- Annotated tags
 486
 487 #
 488 # Called for the creation of an annotated tag
 489 #
 490 generate_create_atag_email()
 491 {
 492         echo "        at  $newrev ($newrev_type)"
 493
 494         generate_atag_email
 495 }
 496
 497 #
 498 # Called for the update of an annotated tag (this is probably a rare event
 499 # and may not even be allowed)
 500 #
 501 generate_update_atag_email()
 502 {
 503         echo "        to  $newrev ($newrev_type)"
 504         echo "      from  $oldrev (which is now obsolete)"
 505
 506         generate_atag_email
 507 }
 508
 509 #
 510 # Called when an annotated tag is created or changed
 511 #
 512 generate_atag_email()
 513 {
 514         # Use git for-each-ref to pull out the individual fields from the
 515         # tag
 516         eval $(git for-each-ref --shell --format='
 517         tagobject=%(*objectname)
 518         tagtype=%(*objecttype)
 519         tagger=%(taggername)
 520         tagged=%(taggerdate)' $refname
 521         )
 522
 523         echo "   tagging  $tagobject ($tagtype)"
 524         case "$tagtype" in
 525         commit)
 526
 527                 # If the tagged object is a commit, then we assume this is a
 528                 # release, and so we calculate which tag this tag is
 529                 # replacing
 530                 prevtag=$(git describe --abbrev=0 $newrev^ 2>/dev/null)
 531
 532                 if [ -n "$prevtag" ]; then
 533                         echo "  replaces  $prevtag"
 534                 fi
 535                 ;;
 536         *)
 537                 echo "    length  $(git cat-file -s $tagobject) bytes"
 538                 ;;
 539         esac
 540         echo " tagged by  $tagger"
 541         echo "        on  $tagged"
 542
 543         echo ""
 544         echo $LOGBEGIN
 545
 546         # Show the content of the tag message; this might contain a change
 547         # log or release notes so is worth displaying.
 548         git cat-file tag $newrev | sed -e '1,/^$/d'
 549
 550         echo ""
 551         case "$tagtype" in
 552         commit)
 553                 # Only commit tags make sense to have rev-list operations
 554                 # performed on them
 555                 if [ -n "$prevtag" ]; then
 556                         # Show changes since the previous release
 557                         git shortlog "$prevtag..$newrev"
 558                 else
 559                         # No previous tag, show all the changes since time
 560                         # began
 561                         git shortlog $newrev
 562                 fi
 563                 ;;
 564         *)
 565                 # XXX: Is there anything useful we can do for non-commit
 566                 # objects?
 567                 ;;
 568         esac
 569
 570         echo $LOGEND
 571 }
 572
 573 #
 574 # Called for the deletion of an annotated tag
 575 #
 576 generate_delete_atag_email()
 577 {
 578         echo "       was  $oldrev"
 579         echo ""
 580         echo $LOGBEGIN
 581         git diff-tree --no-color -s --always --encoding=UTF-8 --pretty=oneline $oldrev
 582         echo $LOGEND
 583 }
 584
 585 # --------------- General references
 586
 587 #
 588 # Called when any other type of reference is created (most likely a
 589 # non-annotated tag)
 590 #
 591 generate_create_general_email()
 592 {
 593         echo "        at  $newrev ($newrev_type)"
 594
 595         generate_general_email
 596 }
 597
 598 #
 599 # Called when any other type of reference is updated (most likely a
 600 # non-annotated tag)
 601 #
 602 generate_update_general_email()
 603 {
 604         echo "        to  $newrev ($newrev_type)"
 605         echo "      from  $oldrev"
 606
 607         generate_general_email
 608 }
 609
 610 #
 611 # Called for creation or update of any other type of reference
 612 #
 613 generate_general_email()
 614 {
 615         # Unannotated tags are more about marking a point than releasing a
 616         # version; therefore we don't do the shortlog summary that we do for
 617         # annotated tags above - we simply show that the point has been
 618         # marked, and print the log message for the marked point for
 619         # reference purposes
 620         #
 621         # Note this section also catches any other reference type (although
 622         # there aren't any) and deals with them in the same way.
 623
 624         echo ""
 625         if [ "$newrev_type" = "commit" ]; then
 626                 echo $LOGBEGIN
 627                 git diff-tree --no-color --root -s --always --encoding=UTF-8 --pretty=medium $newrev
 628                 echo $LOGEND
 629         else
 630                 # What can we do here?  The tag marks an object that is not
 631                 # a commit, so there is no log for us to display.  It's
 632                 # probably not wise to output git cat-file as it could be a
 633                 # binary blob.  We'll just say how big it is
 634                 echo "$newrev is a $newrev_type, and is $(git cat-file -s $newrev) bytes long."
 635         fi
 636 }
 637
 638 #
 639 # Called for the deletion of any other type of reference
 640 #
 641 generate_delete_general_email()
 642 {
 643         echo "       was  $oldrev"
 644         echo ""
 645         echo $LOGBEGIN
 646         git diff-tree --no-color -s --always --encoding=UTF-8 --pretty=oneline $oldrev
 647         echo $LOGEND
 648 }
 649
 650
 651 # --------------- Miscellaneous utilities
 652
 653 #
 654 # Show new revisions as the user would like to see them in the email.
 655 #
 656 show_new_revisions()
 657 {
 658         # This shows all log entries that are not already covered by
 659         # another ref - i.e. commits that are now accessible from this
 660         # ref that were previously not accessible
 661         # (see generate_update_branch_email for the explanation of this
 662         # command)
 663
 664         # Revision range passed to rev-list differs for new vs. updated
 665         # branches.
 666         if [ "$change_type" = create ]
 667         then
 668                 # Show all revisions exclusive to this (new) branch.
 669                 revspec=$newrev
 670         else
 671                 # Branch update; show revisions not part of $oldrev.
 672                 revspec=$oldrev..$newrev
 673         fi
 674
 675         other_branches=$(git for-each-ref --format='%(refname)' refs/heads/ |
 676             grep -F -v $refname)
 677         git rev-parse --not $other_branches |
 678 #       if [ -z "$custom_showrev" ]
 679 #       then
 680 #               git rev-list --pretty --stdin $revspec
 681 #       else
 682                 git rev-list --stdin $revspec |
 683                 while read onerev
 684                 do
 685                         if [ -n "$custom_showrev" ]; then
 686                                 eval $(printf "$custom_showrev" $onerev)
 687                         else
 688                                 echo "$cfg_gitweburl/$projectname/commit/$onerev"
 689                                 echo
 690                                 git diff-tree --no-color -p --always --encoding=UTF-8 --pretty=medium -C $onerev
 691                                 echo
 692                         fi
 693                 done
 694 #       fi
 695 }
 696
 697
 698 size_limit()
 699 {
 700         size=0
 701         while IFS= read line; do
 702                 size=$((size+${#line}))
 703                 if [ $size -gt $1 ]; then
 704                         echo "...e-mail trimmed, has been too large."
 705                         break
 706                 fi
 707                 echo "$line"
 708         done
 709 }
 710
 711
 712 send_mail()
 713 {
 714         if [ -n "$cfg_sender" ]; then
 715                 "${cfg_sendmail_bin:-/usr/sbin/sendmail}" -i -t -f "$cfg_sender"
 716         else
 717                 "${cfg_sendmail_bin:-/usr/sbin/sendmail}" -i -t
 718         fi
 719 }
 720
 721 # ---------------------------- main()
 722
 723 # --- Constants
 724 LOGBEGIN="- Log -----------------------------------------------------------------"
 725 LOGEND="-----------------------------------------------------------------------"
 726
 727 # --- Config
 728 . @basedir@/shlib.sh
 729
 730 # Set GIT_DIR either from the working directory, or from the environment
 731 # variable.
 732 GIT_DIR=$(git rev-parse --git-dir 2>/dev/null)
 733 if [ -z "$GIT_DIR" ]; then
 734         echo >&2 "fatal: post-receive: GIT_DIR not set"
 735         exit 1
 736 fi
 737
 738 projectdesc=$(sed -ne '1p' "$GIT_DIR/description")
 739 # Check if the description is unchanged from it's default, and shorten it to
 740 # a more manageable length if it is
 741 if expr "$projectdesc" : "Unnamed repository.*$" >/dev/null
 742 then
 743         projectdesc="UNNAMED PROJECT"
 744 fi
 745
 746 projectname="$4"
 747 if [ -n "$projectname" ]; then
 748         projectname="$projectname.git"
 749         projectboth="$projectname (\"$projectdesc\")"
 750         projectowner="$(config_get owner)"
 751 else
 752         projectname="$projectdesc"
 753         projectboth="$projectdesc"
 754 fi
 755
 756 emailsender="$5"
 757 emailextraheader="$6"
 758
 759 recipients=$(git config hooks.mailinglist)
 760 announcerecipients=$(git config hooks.announcelist)
 761 envelopesender=$(git config hooks.envelopesender)
 762 emailprefix=$(git config hooks.emailprefix || echo "[$cfg_name] ")
 763 custom_showrev=$(git config hooks.showrev)
 764
 765 # --- Main loop
 766 # Allow dual mode: run from the command line just like the update hook, or
 767 # if no arguments are given then run as a hook script
 768 if [ -n "$1" -a -n "$2" -a -n "$3" ]; then
 769         # Output to the terminal in command line mode - if someone wanted to
 770         # resend an email; they could redirect the output to sendmail
 771         # themselves
 772         if prep_for_email $2 $3 $1; then
 773                 PAGER= generate_email | size_limit $((256*1024)) | send_mail
 774         fi
 775 else
 776         while read oldrev newrev refname
 777         do
 778                 prep_for_email $oldrev $newrev $refname || continue
 779                 PAGER= generate_email | size_limit $((256*1024)) | send_mail
 780         done
 781 fi