--- /dev/null
+#!/bin/sh
+#
+# Copyright (c) 2007 Andy Parkins
+#
+# An example hook script to mail out commit update information. This hook
+# sends emails listing new revisions to the repository introduced by the
+# change being reported. The rule is that (for branch updates) each commit
+# will appear on one email and one email only.
+#
+# This hook is stored in the contrib/hooks directory. Your distribution
+# will have put this somewhere standard. You should make this script
+# executable then link to it in the repository you would like to use it in.
+# For example, on debian the hook is stored in
+# /usr/share/doc/git-core/contrib/hooks/post-receive-email:
+#
+# chmod a+x post-receive-email
+# cd /path/to/your/repository.git
+# ln -sf /usr/share/doc/git-core/contrib/hooks/post-receive-email hooks/post-receive
+#
+# This hook script assumes it is enabled on the central repository of a
+# project, with all users pushing only to it and not between each other. It
+# will still work if you don't operate in that style, but it would become
+# possible for the email to be from someone other than the person doing the
+# push.
+#
+# Config
+# ------
+# hooks.mailinglist
+# This is the list that all pushes will go to; leave it blank to not send
+# emails for every ref update.
+# hooks.announcelist
+# This is the list that all pushes of annotated tags will go to. Leave it
+# blank to default to the mailinglist field. The announce emails lists
+# the short log summary of the changes since the last annotated tag.
+# hooks.envelopesender
+# If set then the -f option is passed to sendmail to allow the envelope
+# sender address to be set
+# hooks.emailprefix
+# All emails have their subjects prefixed with this prefix, or "[SCM]"
+# if emailprefix is unset, to aid filtering
+#
+# Notes
+# -----
+# All emails include the headers "X-Git-Refname", "X-Git-Oldrev",
+# "X-Git-Newrev", and "X-Git-Reftype" to enable fine tuned filtering and
+# give information for debugging.
+#
+
+# ---------------------------- Functions
+
+#
+# Top level email generation function. This decides what type of update
+# this is and calls the appropriate body-generation routine after outputting
+# the common header
+#
+# Note this function doesn't actually generate any email output, that is
+# taken care of by the functions it calls:
+# - generate_email_header
+# - generate_create_XXXX_email
+# - generate_update_XXXX_email
+# - generate_delete_XXXX_email
+# - generate_email_footer
+#
+generate_email()
+{
+ # --- Arguments
+ oldrev=$(git rev-parse $1)
+ newrev=$(git rev-parse $2)
+ refname="$3"
+
+ # --- Interpret
+ # 0000->1234 (create)
+ # 1234->2345 (update)
+ # 2345->0000 (delete)
+ if expr "$oldrev" : '0*$' >/dev/null
+ then
+ change_type="create"
+ else
+ if expr "$newrev" : '0*$' >/dev/null
+ then
+ change_type="delete"
+ else
+ change_type="update"
+ fi
+ fi
+
+ # --- Get the revision types
+ newrev_type=$(git cat-file -t $newrev 2> /dev/null)
+ oldrev_type=$(git cat-file -t "$oldrev" 2> /dev/null)
+ case "$change_type" in
+ create|update)
+ rev="$newrev"
+ rev_type="$newrev_type"
+ ;;
+ delete)
+ rev="$oldrev"
+ rev_type="$oldrev_type"
+ ;;
+ esac
+
+ # The revision type tells us what type the commit is, combined with
+ # the location of the ref we can decide between
+ # - working branch
+ # - tracking branch
+ # - unannoted tag
+ # - annotated tag
+ case "$refname","$rev_type" in
+ refs/tags/*,commit)
+ # un-annotated tag
+ refname_type="tag"
+ short_refname=${refname##refs/tags/}
+ ;;
+ refs/tags/*,tag)
+ # annotated tag
+ refname_type="annotated tag"
+ short_refname=${refname##refs/tags/}
+ # change recipients
+ if [ -n "$announcerecipients" ]; then
+ recipients="$announcerecipients"
+ fi
+ ;;
+ refs/heads/*,commit)
+ # branch
+ refname_type="branch"
+ short_refname=${refname##refs/heads/}
+ ;;
+ refs/remotes/*,commit)
+ # tracking branch
+ refname_type="tracking branch"
+ short_refname=${refname##refs/remotes/}
+ echo >&2 "*** Push-update of tracking branch, $refname"
+ echo >&2 "*** - no email generated."
+ exit 0
+ ;;
+ *)
+ # Anything else (is there anything else?)
+ echo >&2 "*** Unknown type of update to $refname ($rev_type)"
+ echo >&2 "*** - no email generated"
+ exit 1
+ ;;
+ esac
+
+ # Check if we've got anyone to send to
+ if [ -z "$recipients" ]; then
+ case "$refname_type" in
+ "annotated tag")
+ config_name="hooks.announcelist"
+ ;;
+ *)
+ config_name="hooks.mailinglist"
+ ;;
+ esac
+ echo >&2 "*** $config_name is not set so no email will be sent"
+ echo >&2 "*** for $refname update $oldrev->$newrev"
+ exit 0
+ fi
+
+ # Email parameters
+ # The email subject will contain the best description of the ref
+ # that we can build from the parameters
+ describe=$(git describe $rev 2>/dev/null)
+ if [ -z "$describe" ]; then
+ describe=$rev
+ fi
+
+ generate_email_header
+
+ # Call the correct body generation function
+ fn_name=general
+ case "$refname_type" in
+ "tracking branch"|branch)
+ fn_name=branch
+ ;;
+ "annotated tag")
+ fn_name=atag
+ ;;
+ esac
+ generate_${change_type}_${fn_name}_email
+
+ generate_email_footer
+}
+
+generate_email_header()
+{
+ # --- Email (all stdout will be the email)
+ # Generate header
+ cat <<-EOF
+ To: $recipients
+ Subject: ${emailprefix}$projectdesc $refname_type, $short_refname, ${change_type}d. $describe
+ X-Git-Refname: $refname
+ X-Git-Reftype: $refname_type
+ X-Git-Oldrev: $oldrev
+ X-Git-Newrev: $newrev
+
+ This is an automated email from the git hooks/post-receive script. It was
+ generated because a ref change was pushed to the repository containing
+ the project "$projectdesc".
+
+ The $refname_type, $short_refname has been ${change_type}d
+ EOF
+}
+
+generate_email_footer()
+{
+ SPACE=" "
+ cat <<-EOF
+
+
+ hooks/post-receive
+ --${SPACE}
+ $projectdesc
+ EOF
+}
+
+# --------------- Branches
+
+#
+# Called for the creation of a branch
+#
+generate_create_branch_email()
+{
+ # This is a new branch and so oldrev is not valid
+ echo " at $newrev ($newrev_type)"
+ echo ""
+
+ echo $LOGBEGIN
+ # This shows all log entries that are not already covered by
+ # another ref - i.e. commits that are now accessible from this
+ # ref that were previously not accessible
+ # (see generate_update_branch_email for the explanation of this
+ # command)
+ git rev-parse --not --branches | grep -v $(git rev-parse $refname) |
+ git rev-list --pretty --stdin $newrev
+ echo $LOGEND
+}
+
+#
+# Called for the change of a pre-existing branch
+#
+generate_update_branch_email()
+{
+ # Consider this:
+ # 1 --- 2 --- O --- X --- 3 --- 4 --- N
+ #
+ # O is $oldrev for $refname
+ # N is $newrev for $refname
+ # X is a revision pointed to by some other ref, for which we may
+ # assume that an email has already been generated.
+ # In this case we want to issue an email containing only revisions
+ # 3, 4, and N. Given (almost) by
+ #
+ # git rev-list N ^O --not --all
+ #
+ # The reason for the "almost", is that the "--not --all" will take
+ # precedence over the "N", and effectively will translate to
+ #
+ # git rev-list N ^O ^X ^N
+ #
+ # So, we need to build up the list more carefully. git rev-parse
+ # will generate a list of revs that may be fed into git rev-list.
+ # We can get it to make the "--not --all" part and then filter out
+ # the "^N" with:
+ #
+ # git rev-parse --not --all | grep -v N
+ #
+ # Then, using the --stdin switch to git rev-list we have effectively
+ # manufactured
+ #
+ # git rev-list N ^O ^X
+ #
+ # This leaves a problem when someone else updates the repository
+ # while this script is running. Their new value of the ref we're
+ # working on would be included in the "--not --all" output; and as
+ # our $newrev would be an ancestor of that commit, it would exclude
+ # all of our commits. What we really want is to exclude the current
+ # value of $refname from the --not list, rather than N itself. So:
+ #
+ # git rev-parse --not --all | grep -v $(git rev-parse $refname)
+ #
+ # Get's us to something pretty safe (apart from the small time
+ # between refname being read, and git rev-parse running - for that,
+ # I give up)
+ #
+ #
+ # Next problem, consider this:
+ # * --- B --- * --- O ($oldrev)
+ # \
+ # * --- X --- * --- N ($newrev)
+ #
+ # That is to say, there is no guarantee that oldrev is a strict
+ # subset of newrev (it would have required a --force, but that's
+ # allowed). So, we can't simply say rev-list $oldrev..$newrev.
+ # Instead we find the common base of the two revs and list from
+ # there.
+ #
+ # As above, we need to take into account the presence of X; if
+ # another branch is already in the repository and points at some of
+ # the revisions that we are about to output - we don't want them.
+ # The solution is as before: git rev-parse output filtered.
+ #
+ # Finally, tags: 1 --- 2 --- O --- T --- 3 --- 4 --- N
+ #
+ # Tags pushed into the repository generate nice shortlog emails that
+ # summarise the commits between them and the previous tag. However,
+ # those emails don't include the full commit messages that we output
+ # for a branch update. Therefore we still want to output revisions
+ # that have been output on a tag email.
+ #
+ # Luckily, git rev-parse includes just the tool. Instead of using
+ # "--all" we use "--branches"; this has the added benefit that
+ # "remotes/" will be ignored as well.
+
+ # List all of the revisions that were removed by this update, in a
+ # fast forward update, this list will be empty, because rev-list O
+ # ^N is empty. For a non fast forward, O ^N is the list of removed
+ # revisions
+ fast_forward=""
+ rev=""
+ for rev in $(git rev-list $newrev..$oldrev)
+ do
+ revtype=$(git cat-file -t "$rev")
+ echo " discards $rev ($revtype)"
+ done
+ if [ -z "$rev" ]; then
+ fast_forward=1
+ fi
+
+ # List all the revisions from baserev to newrev in a kind of
+ # "table-of-contents"; note this list can include revisions that
+ # have already had notification emails and is present to show the
+ # full detail of the change from rolling back the old revision to
+ # the base revision and then forward to the new revision
+ for rev in $(git rev-list $oldrev..$newrev)
+ do
+ revtype=$(git cat-file -t "$rev")
+ echo " via $rev ($revtype)"
+ done
+
+ if [ "$fast_forward" ]; then
+ echo " from $oldrev ($oldrev_type)"
+ else
+ # 1. Existing revisions were removed. In this case newrev
+ # is a subset of oldrev - this is the reverse of a
+ # fast-forward, a rewind
+ # 2. New revisions were added on top of an old revision,
+ # this is a rewind and addition.
+
+ # (1) certainly happened, (2) possibly. When (2) hasn't
+ # happened, we set a flag to indicate that no log printout
+ # is required.
+
+ echo ""
+
+ # Find the common ancestor of the old and new revisions and
+ # compare it with newrev
+ baserev=$(git merge-base $oldrev $newrev)
+ rewind_only=""
+ if [ "$baserev" = "$newrev" ]; then
+ echo "This update discarded existing revisions and left the branch pointing at"
+ echo "a previous point in the repository history."
+ echo ""
+ echo " * -- * -- N ($newrev)"
+ echo " \\"
+ echo " O -- O -- O ($oldrev)"
+ echo ""
+ echo "The removed revisions are not necessarilly gone - if another reference"
+ echo "still refers to them they will stay in the repository."
+ rewind_only=1
+ else
+ echo "This update added new revisions after undoing existing revisions. That is"
+ echo "to say, the old revision is not a strict subset of the new revision. This"
+ echo "situation occurs when you --force push a change and generate a repository"
+ echo "containing something like this:"
+ echo ""
+ echo " * -- * -- B -- O -- O -- O ($oldrev)"
+ echo " \\"
+ echo " N -- N -- N ($newrev)"
+ echo ""
+ echo "When this happens we assume that you've already had alert emails for all"
+ echo "of the O revisions, and so we here report only the revisions in the N"
+ echo "branch from the common base, B."
+ fi
+ fi
+
+ echo ""
+ if [ -z "$rewind_only" ]; then
+ echo "Those revisions listed above that are new to this repository have"
+ echo "not appeared on any other notification email; so we list those"
+ echo "revisions in full, below."
+
+ echo ""
+ echo $LOGBEGIN
+ git rev-parse --not --branches | grep -v $(git rev-parse $refname) |
+ git rev-list --pretty --stdin $oldrev..$newrev
+
+ # XXX: Need a way of detecting whether git rev-list actually
+ # outputted anything, so that we can issue a "no new
+ # revisions added by this update" message
+
+ echo $LOGEND
+ else
+ echo "No new revisions were added by this update."
+ fi
+
+ # The diffstat is shown from the old revision to the new revision.
+ # This is to show the truth of what happened in this change.
+ # There's no point showing the stat from the base to the new
+ # revision because the base is effectively a random revision at this
+ # point - the user will be interested in what this revision changed
+ # - including the undoing of previous revisions in the case of
+ # non-fast forward updates.
+ echo ""
+ echo "Summary of changes:"
+ git diff-tree --stat --summary --find-copies-harder $oldrev..$newrev
+}
+
+#
+# Called for the deletion of a branch
+#
+generate_delete_branch_email()
+{
+ echo " was $oldrev"
+ echo ""
+ echo $LOGEND
+ git show -s --pretty=oneline $oldrev
+ echo $LOGEND
+}
+
+# --------------- Annotated tags
+
+#
+# Called for the creation of an annotated tag
+#
+generate_create_atag_email()
+{
+ echo " at $newrev ($newrev_type)"
+
+ generate_atag_email
+}
+
+#
+# Called for the update of an annotated tag (this is probably a rare event
+# and may not even be allowed)
+#
+generate_update_atag_email()
+{
+ echo " to $newrev ($newrev_type)"
+ echo " from $oldrev (which is now obsolete)"
+
+ generate_atag_email
+}
+
+#
+# Called when an annotated tag is created or changed
+#
+generate_atag_email()
+{
+ # Use git for-each-ref to pull out the individual fields from the
+ # tag
+ eval $(git for-each-ref --shell --format='
+ tagobject=%(*objectname)
+ tagtype=%(*objecttype)
+ tagger=%(taggername)
+ tagged=%(taggerdate)' $refname
+ )
+
+ echo " tagging $tagobject ($tagtype)"
+ case "$tagtype" in
+ commit)
+
+ # If the tagged object is a commit, then we assume this is a
+ # release, and so we calculate which tag this tag is
+ # replacing
+ prevtag=$(git describe --abbrev=0 $newrev^ 2>/dev/null)
+
+ if [ -n "$prevtag" ]; then
+ echo " replaces $prevtag"
+ fi
+ ;;
+ *)
+ echo " length $(git cat-file -s $tagobject) bytes"
+ ;;
+ esac
+ echo " tagged by $tagger"
+ echo " on $tagged"
+
+ echo ""
+ echo $LOGBEGIN
+
+ # Show the content of the tag message; this might contain a change
+ # log or release notes so is worth displaying.
+ git cat-file tag $newrev | sed -e '1,/^$/d'
+
+ echo ""
+ case "$tagtype" in
+ commit)
+ # Only commit tags make sense to have rev-list operations
+ # performed on them
+ if [ -n "$prevtag" ]; then
+ # Show changes since the previous release
+ git rev-list --pretty=short "$prevtag..$newrev" | git shortlog
+ else
+ # No previous tag, show all the changes since time
+ # began
+ git rev-list --pretty=short $newrev | git shortlog
+ fi
+ ;;
+ *)
+ # XXX: Is there anything useful we can do for non-commit
+ # objects?
+ ;;
+ esac
+
+ echo $LOGEND
+}
+
+#
+# Called for the deletion of an annotated tag
+#
+generate_delete_atag_email()
+{
+ echo " was $oldrev"
+ echo ""
+ echo $LOGEND
+ git show -s --pretty=oneline $oldrev
+ echo $LOGEND
+}
+
+# --------------- General references
+
+#
+# Called when any other type of reference is created (most likely a
+# non-annotated tag)
+#
+generate_create_general_email()
+{
+ echo " at $newrev ($newrev_type)"
+
+ generate_general_email
+}
+
+#
+# Called when any other type of reference is updated (most likely a
+# non-annotated tag)
+#
+generate_update_general_email()
+{
+ echo " to $newrev ($newrev_type)"
+ echo " from $oldrev"
+
+ generate_general_email
+}
+
+#
+# Called for creation or update of any other type of reference
+#
+generate_general_email()
+{
+ # Unannotated tags are more about marking a point than releasing a
+ # version; therefore we don't do the shortlog summary that we do for
+ # annotated tags above - we simply show that the point has been
+ # marked, and print the log message for the marked point for
+ # reference purposes
+ #
+ # Note this section also catches any other reference type (although
+ # there aren't any) and deals with them in the same way.
+
+ echo ""
+ if [ "$newrev_type" = "commit" ]; then
+ echo $LOGBEGIN
+ git show --no-color --root -s --pretty=medium $newrev
+ echo $LOGEND
+ else
+ # What can we do here? The tag marks an object that is not
+ # a commit, so there is no log for us to display. It's
+ # probably not wise to output git cat-file as it could be a
+ # binary blob. We'll just say how big it is
+ echo "$newrev is a $newrev_type, and is $(git cat-file -s $newrev) bytes long."
+ fi
+}
+
+#
+# Called for the deletion of any other type of reference
+#
+generate_delete_general_email()
+{
+ echo " was $oldrev"
+ echo ""
+ echo $LOGEND
+ git show -s --pretty=oneline $oldrev
+ echo $LOGEND
+}
+
+send_mail()
+{
+ if [ -n "$envelopesender" ]; then
+ /usr/sbin/sendmail -t -f "$envelopesender"
+ else
+ /usr/sbin/sendmail -t
+ fi
+}
+
+# ---------------------------- main()
+
+# --- Constants
+LOGBEGIN="- Log -----------------------------------------------------------------"
+LOGEND="-----------------------------------------------------------------------"
+
+# --- Config
+# Set GIT_DIR either from the working directory, or from the environment
+# variable.
+GIT_DIR=$(git rev-parse --git-dir 2>/dev/null)
+if [ -z "$GIT_DIR" ]; then
+ echo >&2 "fatal: post-receive: GIT_DIR not set"
+ exit 1
+fi
+
+projectdesc=$(sed -ne '1p' "$GIT_DIR/description")
+# Check if the description is unchanged from it's default, and shorten it to
+# a more manageable length if it is
+if expr "$projectdesc" : "Unnamed repository.*$" >/dev/null
+then
+ projectdesc="UNNAMED PROJECT"
+fi
+
+recipients=$(git config hooks.mailinglist)
+announcerecipients=$(git config hooks.announcelist)
+envelopesender=$(git config hooks.envelopesender)
+emailprefix=$(git config hooks.emailprefix || echo '[SCM] ')
+
+# --- Main loop
+# Allow dual mode: run from the command line just like the update hook, or
+# if no arguments are given then run as a hook script
+if [ -n "$1" -a -n "$2" -a -n "$3" ]; then
+ # Output to the terminal in command line mode - if someone wanted to
+ # resend an email; they could redirect the output to sendmail
+ # themselves
+ PAGER= generate_email $2 $3 $1
+else
+ while read oldrev newrev refname
+ do
+ generate_email $oldrev $newrev $refname | send_mail
+ done
+fi
git.droids-corp.org / git-central.git / commitdiff