network.sh文件中main函数

## Parse mode
if [[ $# -lt 1 ]] ; then
  printHelp
  exit 0
else
  MODE=$1
  shift
fi

# parse a createChannel subcommand if used
if [[ $# -ge 1 ]] ; then
  key="$1"
  if [[ "$key" == "createChannel" ]]; then
      export MODE="createChannel"
      shift
  fi
fi

# parse flags

while [[ $# -ge 1 ]] ; do
  key="$1"
  case $key in
  -h )
    printHelp $MODE
    exit 0
    ;;
  -c )
    CHANNEL_NAME="$2"
    shift
    ;;
  -ca )
    CRYPTO="Certificate Authorities"
    ;;
  -r )
    MAX_RETRY="$2"
    shift
    ;;
  -d )
    CLI_DELAY="$2"
    shift
    ;;
  -s )
    DATABASE="$2"
    shift
    ;;
  -ccl )
    CC_SRC_LANGUAGE="$2"
    shift
    ;;
  -ccn )
    CC_NAME="$2"
    shift
    ;;
  -ccv )
    CC_VERSION="$2"
    shift
    ;;
  -ccs )
    CC_SEQUENCE="$2"
    shift
    ;;
  -ccp )
    CC_SRC_PATH="$2"
    shift
    ;;
  -ccep )
    CC_END_POLICY="$2"
    shift
    ;;
  -cccg )
    CC_COLL_CONFIG="$2"
    shift
    ;;
  -cci )
    CC_INIT_FCN="$2"
    shift
    ;;
  -verbose )
    VERBOSE=true
    shift
    ;;
  * )
    errorln "Unknown flag: $key"
    printHelp
    exit 1
    ;;
  esac
  shift
done

# Are we generating crypto material with this command?
if [ ! -d "organizations/peerOrganizations" ]; then
  CRYPTO_MODE="with crypto from '${CRYPTO}'"
else
  CRYPTO_MODE=""
fi

# Determine mode of operation and printing out what we asked for
if [ "$MODE" == "up" ]; then
  infoln "Starting nodes with CLI timeout of '${MAX_RETRY}' tries and CLI delay of '${CLI_DELAY}' seconds and using database '${DATABASE}' ${CRYPTO_MODE}"
elif [ "$MODE" == "createChannel" ]; then
  infoln "Creating channel '${CHANNEL_NAME}'."
  infoln "If network is not up, starting nodes with CLI timeout of '${MAX_RETRY}' tries and CLI delay of '${CLI_DELAY}' seconds and using database '${DATABASE} ${CRYPTO_MODE}"
elif [ "$MODE" == "down" ]; then
  infoln "Stopping network"
elif [ "$MODE" == "restart" ]; then
  infoln "Restarting network"
elif [ "$MODE" == "deployCC" ]; then
  infoln "deploying chaincode on channel '${CHANNEL_NAME}'"
else
  printHelp
  exit 1
fi

if [ "${MODE}" == "up" ]; then
  networkUp
elif [ "${MODE}" == "createChannel" ]; then
  createChannel
elif [ "${MODE}" == "deployCC" ]; then
  deployCC
elif [ "${MODE}" == "down" ]; then
  networkDown
else
  printHelp
  exit 1
fi

对第一个if函数进行解析

原文

if [[ $# -lt 1 ]] ; then
  printHelp
  exit 0
else
  MODE=$1
  shift
fi

其中$#用于获取输入的参数有多少，以空格为分界线
if [[ $# -lt 1 ]]表示若输入参数小于1个，则打印help信息，大于等于1个，则将第一个参数用于MODE接收(MODE=$1)，并将参数进行左移(shift)

对第二个if函数进行解析

原文

if [[ $# -ge 1 ]] ; then
  key="$1"
  if [[ "$key" == "createChannel" ]]; then
      export MODE="createChannel"
      shift
  fi
fi

判断接下来的参数是否大于等于一(ge判断大于等于)，如果还有参数，使用key去接收
若key等于createChannel字符串，则将MODE的值设置为createChannel

对第三个if函数进行解析

原文

while [[ $# -ge 1 ]] ; do
  key="$1"
  case $key in
  -h )
    printHelp $MODE
    exit 0
    ;;
  -c )
    CHANNEL_NAME="$2"
    shift
    ;;
  -ca )
    CRYPTO="Certificate Authorities"
    ;;
  -r )
    MAX_RETRY="$2"
    shift
    ;;
  -d )
    CLI_DELAY="$2"
    shift
    ;;
  -s )
    DATABASE="$2"
    shift
    ;;
  -ccl )
    CC_SRC_LANGUAGE="$2"
    shift
    ;;
  -ccn )
    CC_NAME="$2"
    shift
    ;;
  -ccv )
    CC_VERSION="$2"
    shift
    ;;
  -ccs )
    CC_SEQUENCE="$2"
    shift
    ;;
  -ccp )
    CC_SRC_PATH="$2"
    shift
    ;;
  -ccep )
    CC_END_POLICY="$2"
    shift
    ;;
  -cccg )
    CC_COLL_CONFIG="$2"
    shift
    ;;
  -cci )
    CC_INIT_FCN="$2"
    shift
    ;;
  -verbose )
    VERBOSE=true
    shift
    ;;
  * )
    errorln "Unknown flag: $key"
    printHelp
    exit 1
    ;;
  esac
  shift
done

对剩余参数进行左移截取，直到参数为0

对第四个if函数进行解析

原文：

if [ ! -d "organizations/peerOrganizations" ]; then
  CRYPTO_MODE="with crypto from '${CRYPTO}'"
else
  CRYPTO_MODE=""
fi

对于变量名CRYPTO，其值等于cryptogen
判断是否存在organizations/peerOrganizations这个目录，如果不存在，则设置CRYPTO_MODE的值等于with crypto from cryptogen

对第五个if函数进行解析

原文

# Determine mode of operation and printing out what we asked for
if [ "$MODE" == "up" ]; then
  infoln "Starting nodes with CLI timeout of '${MAX_RETRY}' tries and CLI delay of '${CLI_DELAY}' seconds and using database '${DATABASE}' ${CRYPTO_MODE}"
elif [ "$MODE" == "createChannel" ]; then
  infoln "Creating channel '${CHANNEL_NAME}'."
  infoln "If network is not up, starting nodes with CLI timeout of '${MAX_RETRY}' tries and CLI delay of '${CLI_DELAY}' seconds and using database '${DATABASE} ${CRYPTO_MODE}"
elif [ "$MODE" == "down" ]; then
  infoln "Stopping network"
elif [ "$MODE" == "restart" ]; then
  infoln "Restarting network"
elif [ "$MODE" == "deployCC" ]; then
  infoln "deploying chaincode on channel '${CHANNEL_NAME}'"
else
  printHelp
  exit 1
fi

对变量MODE的值进行判断，对不同的值打印不同的提示信息。
infoln函数是通过引用当前文件夹下的scripts/utils.sh文件，进行函数的获取的

对第六个if函数进行解析

原文：

if [ "${MODE}" == "up" ]; then
  networkUp
elif [ "${MODE}" == "createChannel" ]; then
  createChannel
elif [ "${MODE}" == "deployCC" ]; then
  deployCC
elif [ "${MODE}" == "down" ]; then
  networkDown
else
  printHelp
  exit 1
fi

根据MODE变量的值，执行相应的函数

第二节——network.sh中main函数解析

network.sh文件中main函数

对第一个if函数进行解析

对第二个if函数进行解析

对第三个if函数进行解析

对第四个if函数进行解析

对第五个if函数进行解析

对第六个if函数进行解析

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