Ramdisk For XCode

ramdisk.sh

# install to $HOME/.ramdisk

# initramdisk.sh - make a ramdisk, the default size is 6GB.
# syncramdisk.sh - sync files of ramdisk to disk, when logout.
# makeRamDiskWhenRestart.sh - make Hook, LoginHook and LogoutHook. LoginHook for initramdisk.sh, LogoutHook for syncramdisk.sh.
# moveXcodeCacheToRamDisk.sh - run shell above, then move xcode cache folder to ramdisk.

# ---------------- initramdisk.sh ------------------
#!/usr/bin/env sh

# 设置内存盘的名称
DISK_NAME=RamDisk
MOUNT_PATH=/Volumes/$DISK_NAME

# 设置备份文件的保存路径
WORK_PATH=$HOME/.ramdisk
BAK_PATH=$WORK_PATH/$DISK_NAME.tar.gz

# 设置RamDisk日志文件
LOG=$WORK_PATH/RamDisk.log.txt

# 设置分配给内存盘的空间大小(MB) 这是上限值，一般情况下使用多少占多少的内存
DISK_SPACE=1000*6

# 创建Ramdisk
if [ ! -e $MOUNT_PATH ]; then
	echo "["`date`"]" "Create ramdisk..." | tee $LOG
	RAMDISK_SECTORS=$(($DISK_SPACE*1024*2))
	DISK_ID=$(hdiutil attach -nomount ram://$RAMDISK_SECTORS)
	echo "["`date`"]" "Disk ID is :" $DISK_ID | tee -a $LOG
	diskutil erasevolume HFS+ $DISK_NAME ${DISK_ID} | tee -a $LOG
elif [[ $1 == "umount" ]]; then
	echo "Delete/unmount ramdisk $MOUNT_PATH" hdiutil detach $MOUNT_PATH || umount -f $MOUNT_PATH 
	exit
fi

# 隐藏分区
chflags hidden $MOUNT_PATH

# 恢复备份
if [ -s $BAK_PATH ]; then
	echo "["`date`"]" "Restoring BAK Files ..." | tee -a $LOG
	tar -zxvf $BAK_PATH -C $MOUNT_PATH 2>&1 | tee -a $LOG
fi

<<'COMMENT'
例如
DIRS="
/Volumes/Ramdisk/Caches/Google 
/Volumes/Ramdisk/Caches/Safari 
/Volumes/Ramdisk/Caches/Xcode 
/Volumes/RamDisk/Caches/NeteaseMusic 
"
COMMENT

DIRS="
/Volumes/Ramdisk/Caches/Xcode
"

for Dir in $DIRS; do
	if [ ! -d "$Dir" ]; then
		echo "["`date`"]" "Making Directory: $Dir" | tee -a $LOG
		mkdir -p "$Dir"
	fi
done

# ---------------- syncramdisk.sh ------------------
#!/usr/bin/env sh 

# 设置内存盘的名称 
DISK_NAME=RamDisk 
MOUNT_PATH=/Volumes/$DISK_NAME 
# 设置备份文件的保存路径 

WORK_PATH=$HOME/.ramdisk 
BAK_PATH=$WORK_PATH/$DISK_NAME.tar.gz 
LISTFILE=$WORK_PATH/RamDisk_log.txt 

# 设置最大的cache大小(MB) 
MAX_CACHE_SIZE=1024*6 

[ -d $WORK_PATH ] || mkdir $WORK_PATH 

# 删除不需要备份的缓存
# rm -rfv /Volumes/RamDisk/Caches/xxx/* 

# 备份Ramdisk内容，超过50M的目录直接不再保存 
cd $MOUNT_PATH 
declare -a fa 
i=0 
for file in $(du -s Caches/* | sort -n) 
do
	fa[$i]=$file 
	let i=i+1 
done 
size=$((i/2)) 
echo "file number:"$size 
cd $WORK_PATH 
echo ".?*">$LISTFILE 
for((i=0;i<$size;i++)) 
do 
	if ((${fa[$((i*2))]}<(($MAX_CACHE_SIZE*1024*2)) ));then 
		echo "add:"${fa[$((i*2+1))]} 
	else 
		echo ${fa[$((i*2+1))]}>>$LISTFILE 
	fi 
done 
if [ -e $MOUNT_PATH ] ; then 
	cd $MOUNT_PATH 
	tar --exclude-from $LISTFILE -czf $BAK_PATH . 
fi

# ---------------- makeRamDiskWhenRestart.sh ------------------
#!/bin/sh

# 登录时执行 initramdisk.sh
sudo defaults write com.apple.loginwindow LoginHook $HOME/.ramdisk/initramdisk.sh

# 注销时执行syncramdisk.sh
sudo defaults write com.apple.loginwindow LogoutHook $HOME/.ramdisk/syncramdisk.sh

# 查看登录脚本
sudo defaults read com.apple.loginwindow

# ---------------- moveXcodeCacheToRamDisk.sh ------------------
# 创建内存盘： 
sh $HOME/.ramdisk/initramdisk.sh 

# 在桌面创建内存盘软连接： 
ln -s /Volumes/RamDisk ~/Desktop/RamDisk 

# 执行下述命令之前请先退出以下软件：Chrome Safari Xcode 网易云音乐 
# rm -rf ~/Library/Caches/Google 
# ln -s /Volumes/Ramdisk/Caches/Google ~/Library/Caches/Google 

# rm -rf ~/Library/Caches/com.apple.Safari 
# ln -s /Volumes/Ramdisk/Caches/Safari ~/Library/Caches/com.apple.Safari 

rm -rf ~/Library/Developer/Xcode/DerivedData 
ln -s /Volumes/Ramdisk/Caches/Xcode ~/Library/Developer/Xcode/DerivedData 

# rm -rf ~/Library/Containers/com.netease.163music/Data/Caches 
# ln -s /Volumes/RamDisk/Caches/NeteaseMusic ~/Library/Containers/com.netease.163music/Data/