git_info.sh

产生关于git仓库的信息，输出格式为json

#!/bin/bash

set -uo pipefail

# ----------------------------------------------------------------------
# Check for prerequisite utilities
# ----------------------------------------------------------------------

PREREQ_COMMANDS="git"

for COMMAND in ${PREREQ_COMMANDS}; do
    type "${COMMAND}" >/dev/null 2>&1 || { echo >&2 "Required command line utility "${COMMAND}" is not available.  Aborting."; exit 1; }
done

# ----------------------------------------------------------------------
# Retrieve root URI, full commit SHA1, and version
# ----------------------------------------------------------------------

URI=$( git remote -v | grep "fetch" | grep "origin" | awk '{print $2}' )
SHA1=$( git rev-parse HEAD )
VERSION=$( git describe )

# ----------------------------------------------------------------------
# Generate root JSON record
# ----------------------------------------------------------------------

echo -n "
{"root": {
  "uri": "${URI}",
  "sha1": "${SHA1}",
  "version": "${VERSION}"},
  "submodules": ["

# ----------------------------------------------------------------------
# Generate submodule records
# ----------------------------------------------------------------------

submodules=$( git submodule status )
submodule_count=$( git submodule status | wc -l | tr -d ' ' )

COUNTER=0
IFS=$'
'

for line in $submodules; do
    SOURCE_PATH=$( echo "${line}" | cut -d " " -f3 )
    SHA1=$( echo "${line}" | cut -d " " -f2 )
    TAG=$( echo "${line}" | cut -d " " -f4 )
    COUNTER=$((COUNTER+1))

echo -n "
     {"source_path": "${SOURCE_PATH}",
      "sha1": "${SHA1}",
      "tag": "${TAG//[)(]/}"}"

    if [ "${COUNTER}" != "${submodule_count}" ]; then
        echo -n ","
    fi
done

echo "]}"