golang编写程序时，shell在子目录批量执行go mod tidy

最近在go的项目里，用到了mod，但目录太多了，有时有的依赖用了后来又废弃了，后来发现go.sum go.mod文件内容好大，了解到go mod tidy可以完成完成检测依赖添加移除工作，于是就执行了，但目录太多了，真的很麻烦，于是乎，写了个shell脚本来批量做这个事…

chmod +x tidy.sh

./tidy.sh

#!/usr/bin/env bash
###########################################################
#Author:mengdj@outlook.com
#Created Time:2020.12.04 11:56
#Description:execute go mod tidy in current directory
#Version:0.0.4
#File:tidy.sh
###########################################################

CURRENT_DIR=$(pwd)
SEARCH_DIR=$CURRENT_DIR
SEARCH_TOTAL=0
EXECUTE_CMD="go mod tidy"
EXECUTE_TIMESTAMP=`date +%s`
EXECUTE_FIFO="$$.fifo"
EXECUTE_MAX_PROCESS=4

function GoTidy() {
    for file in $(ls $1); do
        local target="$1/$file"
        if [ -d $target ]; then
            cd $target
            #case
            if [ -f "go.mod" ];then
                read -u 6
                {
                    `$EXECUTE_CMD`
                    #revert data to pipe
                    echo >&6    
                } &
                if [ $? -ne 0 ]; then
                    break
                fi
                echo "process $target"
                let "SEARCH_TOTAL+=1"
            fi
                GoTidy $target 
        fi
    done
}

#test
if [ $# -ne 0 ]; then
    if [ -d $1 ]; then
        cd $1
        SEARCH_DIR=$(pwd)
    else
        echo "$1 is not exist directory."
        exit
    fi
fi

#start
mkfifo $EXECUTE_FIFO
#alias file description
exec 6<> $EXECUTE_FIFO
rm -rf $EXECUTE_FIFO
for i in `seq $EXECUTE_MAX_PROCESS`;do
    echo >&6
done
GoTidy $SEARCH_DIR
wait
#close fifo
exec 6<&-

let "EXECUTE_TIMESTAMP=`date +%s`-EXECUTE_TIMESTAMP"
echo "processed($SEARCH_TOTAL),loss $EXECUTE_TIMESTAMP seconds."
#back directory
cd $CURRENT_DIR

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