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#!/bin/bash
# refs data via STDIN - one line per target ref (where ref_data is: prev_sha curr_sha ref_file)
# e.g.
# a559985626bbf4448ccf9041857449078db6d731 1d5002ade3f71200274f1ba39e35a732d86220b5 refs/heads/master
# 0000000000000000000000000000000000000000 1d5002ade3f71200274f1ba39e35a732d86220b5 refs/heads/new-branch
## constants ##
readonly LOG_PBOT_GIT_HOOK=1
readonly LOG_DIR=/var/log/pbot
readonly SHA_REGEX='^([0-9a-f]{40})$'
## logging ##
LogFile() # (repo ref)
{
local repo=$1
local ref=$2
local log_file=${LOG_DIR}/notify-pbot-${repo}-${ref}
echo ${log_file}
}
LogParseRefDataIn() # (ref_data prev_sha curr_sha ref_file repo ref is_deletion)
{
local ref_data=$1 ; local prev_sha=$2 ; local curr_sha=$3 ; local ref_file=$4 ;
local repo=$5 ; local ref=$6 ; local is_deletion=$7 ;
local log_file=$(LogFile ${repo} ${ref})
(( $LOG_PBOT_GIT_HOOK )) && echo "ref_data=${ref_data}" > ${log_file} && \
echo "prev=${prev_sha}" >> ${log_file} && \
echo "curr=${curr_sha}" >> ${log_file} && \
echo "ref_file=${ref_file}" >> ${log_file} && \
echo "ref=${ref}" >> ${log_file} && \
echo "is_deletion=${is_deletion}" >> ${log_file}
}
LogParseRefDataOut() # (hacker author log_msg n_behind n_ahead n_total repo ref)
{
local hacker=$1 ; local author=$2 ; local log_msg=$3 ; local n_behind=$4 ;
local n_ahead=$5 ; local n_total=$6 ; local repo=$7 ; local ref=$8 ;
local log_file=$(LogFile ${repo} ${ref})
(( $LOG_PBOT_GIT_HOOK )) && echo "hacker=${hacker}" >> ${log_file} && \
echo "author=${author}" >> ${log_file} && \
echo "log_msg=${log_msg}" >> ${log_file} && \
echo "n_behind=${n_behind}" >> ${log_file} && \
echo "n_ahead=${n_ahead}" >> ${log_file} && \
echo "n_total=${n_total}" >> ${log_file} && \
echo "repo=${repo}" >> ${log_file}
}
## helpers ##
ParseRefData() # (prev_sha curr_sha ref_file)
{
local prev_sha=$1
local curr_sha=$2
local ref_file=$3
local ref=${ref_file##*/}
local repo=$(basename $(pwd))
local is_deletion=$(git show-ref "${ref}" > /dev/null && echo 0 || echo 1)
LogParseRefDataIn "${ref_data}" ${prev_sha} ${curr_sha} ${ref_file} ${repo} ${ref} ${is_deletion}
# validate ref data
[[ "$#" == '3' ]] && \
[[ "${prev_sha}" =~ ${SHA_REGEX} ]] && \
[[ "${curr_sha}" =~ ${SHA_REGEX} ]] && \
[[ "${ref}" ]] || return
# collect push details
local hacker=$( /usr/lib/parabola-hackers/last-hacker-login )
local author="$( git log -1 --format='%an' ${curr_sha} )"
local log_msg="$(git log -1 --format='%s' ${curr_sha} )"
local n_behind=$(git rev-list --count ${curr_sha}..${prev_sha} 2> /dev/null)
local n_ahead=$( git rev-list --count ${prev_sha}..${curr_sha} 2> /dev/null)
local n_total=$( git rev-list --count ${ref} 2> /dev/null)
LogParseRefDataOut ${hacker} ${author} ${log_msg} ${n_behind} ${n_ahead} ${n_total} ${repo} ${ref}
# fall-back to author name if the hacker detector fails
[[ "${hacker}" ]] || hacker="${author}"
# detect new ref
[[ ${prev_sha} =~ ^0{40}$ ]] && n_behind='∞' n_ahead=${n_total}
# prepare pbot message
if (( ${is_deletion} ))
then echo "${hacker} deleted ${repo}/${ref}"
else echo "${hacker} pushed (-${n_behind} +${n_ahead}) commits to ${repo}/${ref}: ${log_msg}"
fi
}
## main entry ##
while read ref_data ; do pbot-say "$(ParseRefData ${ref_data})" ; done ;
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