Mac 自动下载切换壁纸

Mac 自动下载切换壁纸

自己动手,丰衣足食

上回说到自己写了个脚本去下载国家地理的每日一图,今天就完善(其实就是再总结成中文版滴)一下,增加一个必应的壁纸,在 Mac 上自动下载壁纸到指定文件夹,简单设置一下让 Mac 自动切换壁纸,给既定的生活添点变化。

国家地理和必应壁纸下载脚本

首先,选择一个文件夹,比如说 /Users/franklin/Pictures/Wallpapers/,下面就指 Wallpapers 文件夹啦。在里面新建两个脚本。

首先是国家地理的下载脚本,就叫 ng.sh吧:

#!/bin/bash

# change directory to where the script resides
BASEDIR=$(dirname $0)
cd "$BASEDIR"

# get html
data=$(curl -s https://www.nationalgeographic.com/photography/photo-of-the-day/)
if [ -n "$data" ]
then

# get img url
imgurl=$(grep 'property="og:image"' <<< "$data")
imgurl="$(cut -d"\"" -f4 <<< $imgurl)"

# get image name from canonical link & get publish date
name=$(grep 'rel="canonical"' <<< "$data")
name="$(cut -d"\"" -f4 <<< $name)"
name="$(cut -d"/" -f8 <<< $name)"

date=$(grep 'meta property="gsa_publish_date"' <<< "$data")
date="$(cut -d"\"" -f4 <<< $date)"
date=$(echo "$date" | sed 's/-//g')

file="$date - $name.jpg" # format file name

if [ -f "$file" ]
then
    filesize=$(wc -c < "$file")
    filesize=$(($filesize)) # parseInt
    actualsize="$(curl -s -L -I $imgurl | awk 'tolower ($1) ~ /^content-length/ { print $2 }')"
    actualsize=$(echo $actualsize | sed "s/$(printf '\r')\$//") # remove carriage return on macOS

    # check file integrity
    # sometimes the image may partially downloaded because of network interrupt
    if [ "$filesize" -eq "$actualsize" ]
    then
        echo "$(date) - '$file' already downloaded"
    else
        curl -s "$imgurl" > "$file"
        echo "$(date) - image saved as $file"
    fi
else
    curl -s "$imgurl" > "$file"
    echo "$(date) - image saved as $file"
fi

else
echo "$(date) - connection failed"
fi

说实话,国家地理的图良莠不齐,自然风光的我很喜欢,人文的很多时候我不太能接受作为壁纸使用。

接下来是颇受好评的必应壁纸,就叫 bing.sh 吧,和国家地理的脚本类似:

#!/bin/bash

# change directory to where the script resides.
BASEDIR=$(dirname $0)
cd "$BASEDIR"

bing="https://www.bing.com"

# the idx parameter determines where to start from. 0 is the current day,
xmlURL="https://www.bing.com/HPImageArchive.aspx?format=xml&idx=0&n=1&mkt=zh-CN"

# Valid options: "_1024x768" "_1280x720" "_1366x768" "_1920x1200" "_1920x1080" "_UHD"
picRes="_UHD"

# The file extension for the Bing pic
picExt=".jpg"

# the XML data retrieved from xmlURL, form the fully qualified
# URL for the pic of the day, and store it in $picURL
data=$(curl -s $xmlURL)

if [ -n "$data" ]
then
picURL=$(cut -d '>' -f13 <<< "$data")
picURL=$(cut -d '<' -f 1 <<< "$picURL")
picURL=$bing$picURL$picRes$picExt

date=$(cut -d '>' -f5 <<< "$data")
date=$(cut -d '<' -f1 <<< "$date")

name=$(cut -d '>' -f15 <<< "$data")
name=$(cut -d '<' -f 1 <<< "$name")
name=$(cut -d '(' -f 1 <<< "$name")

len=${#name}

file="$date - ${name:0:len-1}$picExt"

if [ -f "$file" ]
then
    filesize=$(wc -c < "$file")
    filesize=$(($filesize)) # parseInt
    actualsize="$(curl -s -L -I $picURL | awk 'tolower ($1) ~ /^content-length/ { print $2 }')"
    actualsize=$(echo $actualsize | sed "s/$(printf '\r')\$//") # remove carriage return on macOS

    if [ "$filesize" -eq "$actualsize" ]
    then
        echo "$(date) - '$file' already downloaded"
    else
        curl -s "$picURL" > "$file"
        echo "$(date) - image saved as $file"
    fi
else
    curl -s "$picURL" > "$file"
    echo "$(date) - image saved as $file"
fi

else
echo "$(date) - connection failed"
fi

根据 @heroncrow 的建议才增加的 _UHD,可以获取必应高清壁纸了,👍

根据 @ystävä 的提议,修复了 awk 忽略大小匹配的问题,多谢。

这两个脚本分别负责下载国家地理和必应每天的壁纸,下载的壁纸文件存放在这个脚本所处的文件夹里面,也就是 Wallpapers 文件夹里。文件是按“日期 - 图片名”形式存储的,也方便管理。

这两个脚本是硬编的,大佬们见笑啦 😊。

再新建另一个脚本,就叫 wallpapers.sh 吧,用来调用上面这两个脚本:

#!/bin/bash

path=$0

BASEDIR=$(dirname "$path")

cd "$BASEDIR"

./bing.sh
./ng.sh

exit

今后如果要添加其他的壁纸源,照猫画虎添进来就好。

然后,需要给这三个脚本赋予可执行的权限:

chmod u+x /Users/franklin/Pictures/Wallpapers/ng.sh
chmod u+x /Users/franklin/Pictures/Wallpapers/bing.sh
chmod u+x /Users/franklin/Pictures/Wallpapers/wallpapers.sh

launchctl 定时运行壁纸下载脚本

~/Library/LaunchAgents/ 里新建一个 plist 文件,例如 com.frankindev.wallpapers.plist:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
  <!-- give a unique Label -->
  <key>Label</key>
  <string>com.frankindev.wallpapers.plist</string>
  <!-- path to the script -->
  <key>ProgramArguments</key>
  <array>
    <string>/Users/franklin/Pictures/Wallpapers/wallpapers.sh</string>
  </array>
  <!-- set the interval time in seconds -->
  <key>KeepAlive</key>
  <true/>
  <key>ThrottleInterval</key>
  <integer>7200</integer>
<!-- std output -->
<key>StandardOutPath</key>
<string>/Users/franklin/Pictures/Wallpapers/wallpapers.log</string>
<!-- std err output -->
<key>StandardErrorPath</key>
<string>/Users/franklin/Pictures/Wallpapers/wallpapers.err</string>
</dict>
</plist>

按实际情况更改里面的 Label、文件路径和运行间隔这些。

这里设定的是每两个小时运行一次下载脚本。在上面的具体脚本里面其实设置了检查文件是否已经下载,这么做也就是图个安心,以防网络不稳定当天的壁纸没下载到(或不完整)。

建好 plist 文件后,需要使用 macOS 的 launchctl 添加到系统的启动进程里:

launchctl load -w ~/Library/LaunchAgents/com.frankindev.wallpapers.plist

Okay,这样系统就会悄悄滴每两个小时去运行一次壁纸下载脚本了。如果想了解更多关于 launchctl 的资料,这边请

需要注意,如需修改 plist 文件中的内容,需要先 unloadload 才会生效:

launchctl unload -w ~/Library/LaunchAgents/com.frankindev.wallpapers.plist

launchctl load -w ~/Library/LaunchAgents/com.frankindev.wallpapers.plist

使用 Linux 的同学当然也可以用 crontab 来替换 launchctl。

Mac 自定义壁纸设置

壁纸到手了,就只需在 Mac 系统设置里添加壁纸文件夹,以及简单的个性化设置一下。如下图左下角那个 + 添加自定义文件夹:

macOS 壁纸设置

如有不满意的壁纸今后去文件夹里删除掉就好了,其他地方下载的壁纸也可以丢到这个文件夹里统一管理。

我其实是将这个 Wallpapers 文件夹放在 OneDrive 里面进行同步的,当使用同一个账户切换到 Windows 下时我照样可以使用这些壁纸设置桌面。

以上,有什么建议、意见留言讨论哈!

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Frank Lin

Hey, there! This is Frank Lin (@flinhong), one of the 1.4 billion 🇨🇳. This 'inDev. Journal' site holds the exploration of my quirky thoughts and random adventures through life. Hope you enjoy reading and perusing my posts.

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