Android Source：优雅的repo sync自动重试

问题

• 下载代码被墙

  修改 hosts 文件

• repo sync 时候卡住

• repo sync 时候中断

代码

要保证同时只有一个 repo 在运行

#!/bin/bash# 当前 repo sync 进程的 pidPID=kill_all_prog() {    # 用ps找出所有的repo, 然后kill掉    echo "kill all prog(s)"    PIDS=`ps aux |grep python|grep [r]epo |awk '{print $2}'`    [[ -n $PIDS ]] && kill $PIDS}kill_prog() {    # kill 当前repo sync子进程    if [[ -n $PID ]]; then      echo "kill : $PID"      kill $PID    fi}start_sync() {    # 启动子进程(使用coproc)    coproc syncproc { repo sync; }    PID=$syncproc_PID}restart_sync() {    kill_prog    kill_all_prog    start_sync}# 如果网络流量在retry_delay时间内小于min_speed, 则认为repo sync已经卡住了min_speed="50"retry_delay=300((counter=0))((n_retries=0))kill_all_progrestart_syncwhile [[ 1 ]]; do    # 用ifstat检测网速    speed=`ifstat 1 1 | tail -n 1 | awk '{print $1}'`    result=$(echo "$speed < $min_speed" | bc)    if [[ $result == "1" ]]; then        ((counter++))    else        ((counter=0))    fi    if [[ `ps -p $PID| wc -l` == "1" ]]; then        # 检测到子进程已经退出(ps已经查不到它了)        # 用wait取得子进程返回值        wait $PID        if [[ $? -eq 0 ]]; then            echo "sync successful"            break        else            echo "sync failed"            ((counter=0))            ((n_retries++))            restart_sync            continue        fi    fi    if ((counter > retry_delay)); then        ((counter=0))        echo "netspeed low. restart!"        ((n_retries++))        restart_sync    elif [[ counter -gt 20 ]]; then       echo -e "\n" "netspeed low counter is " $counter "\n";    fidoneecho "completed with $n_retries retries"

废弃的代码

下面代码也是要保证只能有一个 repo 命令执行，且执行成功后还会执行

#!/bin/bash# FIXME: 只允许同时一个repo运行kill_prog() {    # 用ps找出所有的repo, 然后kill掉    PID=`ps aux |grep python|grep [r]epo |awk '{print $2}'`    [[ -n $PID ]] && kill $PID}start_sync() {    repo sync &}restart_sync() {    kill_prog    start_sync}# 如果网络流量在retry_delay时间内小于min_speed, 则认为repo sync已经卡住了min_speed="50"retry_delay=600((counter=0))((n_retries=0))restart_syncwhile [[ 1 ]]; do    # 用ifstat检测网速    speed=`ifstat 1 1 | tail -n 1 | awk '{print $1}'`    result=$(echo "$speed < $min_speed" | bc)    if [[ $result == "1" ]]; then        ((counter++))    else        ((counter=0))    fi    if ((counter > retry_delay)); then        ((counter=0))        echo "netspeed low. restart!"        ((n_retries++))        restart_sync    elif [[ counter -gt 10 ]]; then       echo -e "\n" "netspeed low counter is " $counter "\n";    fidoneecho "completed with $n_retries retries"

来自

http://blog.csdn.net/xia0pang/article/details/20281071