Add slack hook

diff --git a/slack b/slack
new file mode 100644 (file)
index 0000000..e83153c
--- /dev/null
+++ b/slack
@@ -0,0 +1,284 @@
+#!/bin/bash
+#
+# Slack (slack.com) notification post-receive hook.
+#
+# Based on: https://github.com/joemiller/git-hooks Campfire notification post-receive hook. Author: Joe Miller
+# (http://joemiller.me)
+#
+# Based on post-receive.irc by Mikael Fridh <frimik@gmail.com> https://gist.github.com/1821358
+#
+
+function help() {
+  echo "Required config settings:"
+  echo " git config hooks.slack.webhook-url 'https://hooks.slack.com/services/...'"
+  echo " git config hooks.slack.channel 'general'"
+  echo " git config hooks.slack.show-only-last-commit 'true' #optional"
+  echo " git config hooks.slack.username 'git' #optional"
+  echo " git config hooks.slack.icon-url 'http://imgur/icon.png' #optional"
+  echo " git config hooks.slack.icon-emoji ':twisted_rightwards_arrows:' #optional"
+  echo " git config hooks.slack.repo-nice-name 'MyRepo' #optional"
+  echo " git config hooks.slack.repos-root '/path/to/repos' #optional"
+  echo " git config hooks.slack.changeset-url-pattern 'http://yourserver/%repo_path%/changeset/%rev_hash
+%' #optional"
+  echo " git config hooks.slack.compare-url-pattern 'http://yourserver/%repo_path%/changeset/%old_rev_ha
+sh%..%new_rev_hash%' #optional"
+}
+
+function notify_slack() {
+  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 notification generated."
+      return 0
+      ;;
+    *)
+      # Anything else (is there anything else?)
+      echo >&2 "*** Unknown type of update to $refname ($rev_type)"
+      echo >&2 "***  - no notification generated"
+      return 0
+      ;;
+  esac
+  # plural suffix, default "", changed to "s" if commits > 1
+  s=""
+
+  # Repo name, either Gitolite or normal repo.
+  if [ -n "$GL_REPO" ]; then
+    # it's a gitolite repo
+    repodir=$(basename `pwd`)
+    repo=$GL_REPO
+  else
+    repodir=$(basename `pwd`)
+    if [ "$repodir" == ".git" ]; then
+      repodir=`dirname $PWD`
+      repodir=`basename $repodir`
+    fi
+    repo=${repodir%.git}
+  fi
+
+  repoprefix=$(git config hooks.slack.repo-nice-name || git config hooks.irc.prefix || git config hooks.emailprefix || echo "$repo")
+  onlylast=`git config --get hooks.slack.show-only-last-commit`
+  onlylast=$onlylast && [ -n "$onlylast" ]
+
+  # Get the user information
+  # If $GL_USER is set we're running under gitolite.
+  if [ -n "$GL_USER" ]; then
+    user=$GL_USER
+  else
+    user=$USER
+  fi
+
+  case ${change_type} in
+    "create")
+      header="New ${refname_type} *${short_refname}* has been created in ${repoprefix}"
+      single_commit_suffix="commit"
+      ;;
+    "delete")
+      header="$(tr '[:lower:]' '[:upper:]' <<< ${refname_type:0:1})${refname_type:1} *$short_refname* has been deleted from ${repoprefix}"
+      single_commit_suffix="commit"
+      ;;
+    "update")
+      num=$(git log --pretty=oneline ${1}..${2}|wc -l|tr -d ' ')
+      branch=${3/refs\/heads\//}
+
+      if [ ${num} -gt 1 ]; then
+        header="${num} new commits *pushed* to *${short_refname}* in ${repoprefix}"
+        single_commit_suffix="one"
+        s="s"
+      else
+        header="A new commit has been *pushed* to *${short_refname}* in ${repoprefix}"
+        single_commit_suffix="one"
+      fi
+
+      ;;
+    *)
+      # most weird ... this should never happen
+      echo >&2 "*** Unknown type of update to $refname ($rev_type)"
+      echo >&2 "***  - notifications will probably screw up."
+      ;;
+  esac
+  if $onlylast && [[ "${change_type}" != "delete" ]]; then
+    header="$header, showing last $single_commit_suffix:"
+  fi
+
+
+  if [[ "${change_type}" != "delete" && "${refname_type}" == "branch" ]]; then
+    changeseturlpattern=`git config --get hooks.slack.changeset-url-pattern`
+    compareurlpattern=`git config --get hooks.slack.compare-url-pattern`
+    reporoot=`git config --get hooks.slack.repos-root`
+
+    urlformat=
+    if [ -n "$changeseturlpattern" -a -n "$reporoot" ]; then
+      if [[ $PWD == ${reporoot}* ]]; then
+        repopath=$PWD
+        base=`basename $PWD`
+        if [ "$base" == ".git" ]; then
+          repopath=`dirname $repopath`
+        fi
+        idx=`echo $reporoot | wc -c | tr -d ' '`
+        repopath=`echo $repopath | cut -c$idx-`
+        urlformat=`echo $changeseturlpattern | sed "s|%repo_path%|$repopath|g" | sed "s/%rev_hash%/%H/g"`
+
+        if [ -n "$compareurlpattern" ]; then
+          comparelink=`echo $compareurlpattern | sed "s|%repo_path%|$repopath|g"  | sed "s|%old_rev_hash%|$oldrev|g" | sed "s|%new_rev_hash%|$newrev|g"`
+          header=`echo $header | sed -e "s|\([a-zA-Z0-9]\{1,\} new commit[s]\{0,1\}\)|\<$comparelink\|\\1\>|"`
+        fi
+      else
+        echo >&2 "$PWD is not in $reporoot. Not creating hyperlinks."
+      fi
+    fi
+
+    formattedurl=""
+    if [ -n "$urlformat" ]; then
+      formattedurl="<${urlformat}|%h> "
+    fi
+
+
+    nl="\\\\n"
+
+    if [[ "${change_type}" == "update" ]]; then
+      start="${1}"
+    else
+      start="HEAD"
+    fi
+
+    end="${2}"
+
+    # merge `git log` output with $header
+    if $onlylast; then
+      countarg="-n 1"
+    else
+      countarg=""
+    fi
+
+    # Process the log and escape double quotes; assuming for now that committer names don't have five semicolons in them
+    log_out=$( git log --pretty=format:"%cN;;;;;${formattedurl}%s" $countarg ${start}..${end} \
+             | sed -e 's/\\/\\\\/g' \
+             | sed -e 's/"/\\"/g' \
+             | sed -e 's/\(.*\);;;;;\(.*\)/{"title":"\1","value":"\2","short":false},/' )
+
+    fields=${log_out%?}
+
+    attachments="[{ \"fallback\" : \"${header}\", \"color\" : \"good\", \"fields\" : [${fields}]}]"
+  fi
+
+  if [ -n "${attachments}" ] && [[ "${attachments}" != "" ]]; then
+    msg=$(echo -e "\"text\":\"${header}\", \"attachments\" : $attachments")
+  else
+    msg=$(echo -e "\"text\":\"${header}\"")
+  fi
+
+  # slack API uses \n substitution for newlines
+  # msg=$(echo "${msg}" | perl -p -e 's/\+/&#43;/mg')
+
+  webhook_url=$(git config --get hooks.slack.webhook-url)
+  channel=$(git config --get hooks.slack.channel)
+  username=$(git config --get hooks.slack.username)
+  iconurl=$(git config --get hooks.slack.icon-url)
+  iconemoji=$(git config --get hooks.slack.icon-emoji)
+
+  if [ -z "$webhook_url" ] || [ -z "$channel" ]; then
+    echo "ERROR: config settings not found"
+    help
+    exit 1
+  fi
+
+  payload="{${msg}, \"channel\": \"#$channel\""
+
+  if [ -n "$username" ]; then
+    payload="$payload, \"username\": \"$username\""
+  fi
+
+  if [ -n "$iconurl" ]; then
+    payload="$payload, \"icon_url\": \"$iconurl\""
+  elif [ -n "$iconemoji" ]; then
+    payload="$payload, \"icon_emoji\": \"$iconemoji\""
+  fi
+
+  payload="$payload}"
+
+  if [ -n "$DEBUG" ]; then
+    echo "POST $webhook_url"
+    echo "payload=$payload"
+    return
+  fi
+
+  curl -s \
+      -d "payload=$payload" \
+      "$webhook_url" \
+      >/dev/null
+}
+
+webhook_url=$(git config --get hooks.slack.webhook-url)
+
+while read line; do
+  set -- $line
+  if [ -n "$webhook_url" ]; then
+      notify_slack $*
+  fi
+
+  RET=$?
+done
+
+exit $RET