MacOS终端等待打开的程序

Question

我使用名为 PDF Lightweight 的应用程序来压缩我的 PDF（因为我的体验非常好），并使用 Thunderbird 来发送电子邮件。

我想编写一个 AppleScript，在将 PDF 附加到电子邮件之前对其进行压缩：

set attachment1 to "/Users/username/Desktop/Test.pdf"

do shell script "open -a " & quoted form of ("/Applications/Lightweight PDF.app") & " " & quoted form of attachment1

set email_attachment to "attachment=" & "'file://" & attachment1 & "'"
set thunderbird_bin to "/Applications/Thunderbird.app/Contents/MacOS/thunderbird-bin -compose "
set arguments to email_attachment

do shell script thunderbird_bin & quoted form of arguments & ">/dev/null 2>&1 &"

问题是原始 PDF 将在压缩完成之前附加。我尝试使用this 之类的东西，但它也不起作用。我想是因为我使用“打开”命令启动 PDF Lightweight，即使应用程序仍在压缩，该命令在技术上也是完整的。

知道如何让脚本等待 PDF 压缩吗？

谢谢！

Answer 1

我现在通过查看文件大小来使用解决方法。一旦工作完成，pdf应该更小，所以是时候继续前进了。

set oldSize to text item 1 of (do shell script "du " & quoted form of ShrinkPDF)
set newSize to text item 1 of (do shell script "du " & quoted form of ShrinkPDF)

do shell script "open -a " & quoted form of ("/Applications/Lightweight PDF.app") & " " & quoted form of ShrinkPDF

set timer to 0

repeat while newSize = oldSize and timer < 6
    set newSize to text item 1 of (do shell script "du " & quoted form of ShrinkSize)
    delay 1
    set timer to timer + 1
end repeat

if newSize = oldSize then
    tell application "Lightweight PDF"
        activate
    end tell
    display dialog "This is taking a while maybe you want to quit manually..."
end if

tell application "Lightweight PDF"
quit
end tell

Answer 2

知道如何让脚本等待 PDF 压缩吗？

在使用 AppleScript 时，您确实不需要使用 do shell script command 来打开 PDF Lightweight 并处理 PDF 文件。

以下示例 AppleScript 代码将打开PDF Lightweight并处理目标PDF file 并且在完成处理 file 之前不会继续处理剩余的 code，再加上几秒钟：

set thisPDF to "/path/to/filename.pdf"

tell application id "com.enoughpepper.lightweightpdf"
    open thisPDF's quoted form
    quit
end tell

--  # Code placed here will not run until the 
--  # PDF file has finished being processed.

---

如果出于某种原因您想使用do shell script 命令 打开 PDF Lightweight 并处理 PDF 文件。

以下示例 AppleScript 代码将打开PDF Lightweight并处理目标PDF file 并且在完成处理 file 之前不会继续处理剩余的 code：

set thisPDF to "/path/to/filename.pdf"

set shellCmd to ¬
    "ps -eo  %cpu,command | awk '/[L]ightweight PDF/{print int($1)}'"

do shell script ¬
    "open -j -b 'com.enoughpepper.lightweightpdf'" & ¬
    space & thisPDF's quoted form

delay 2
repeat while (do shell script shellCmd) is greater than 0
    delay 1
end repeat

tell application id "com.enoughpepper.lightweightpdf" to quit

--  # Code placed here will not run until the 
--  # PDF file has finished being processed.

在这种示例 AppleScript 代码的形式中，它确定应用程序已完成处理 PDF 文件，因为它不再消耗 CPU 周期。换句话说，当 file 处理完成时，do shell script command 返回 0。