Rebol2:将目录更改为绝对文件路径不起作用

Question

我正在尝试从配置文件中读取文件路径，然后从该目录中读取。我找不到一种方法来让它工作，因为出于某种原因，change-dir从来不会进入绝对的文件路径。这是我试图让它在CLI上工作的文字记录。

>> test: pick read/lines %test.ini 1
== "test: C/Users/thompson/Downloads/"
>> test: find test " "
== " C/Users/thompson/Downloads/"
>> test: next test
== "C/Users/thompson/Downloads/"
>> test: to file! test
== %C/Users/thompson/Downloads/
>> change-dir test
** Access Error: Cannot open /C/rscratch/C/Users/thompson/Downloads/
** Near: change-dir test

Answer 1

它失败了，因为Rebol没有看到

%C/Users/thompson/Downloads/

作为绝对路径-它缺少魔术前导斜杠，因此被视为相对路径。绝对路径是这样的：

%/C/Users/thompson/Downloads/

因此，如果您确定没有前导斜杠，那么很容易修复：

>> test: pick read/lines %test.ini 1
== "test: C/Users/thompson/Downloads/"
>> test: find test " "
== " C/Users/thompson/Downloads/"
>> test: next test
== "C/Users/thompson/Downloads/"
>> test: to file! join "/" test

Answer 2

有很多方法可以得到一个绝对的Rebol文件路径，

Rebol方式

 test: "test: %/C/Users/thompson/Downloads/"
 select load test [test:]

linux方式

test: "test: /C/Users/thompson/Downloads/"
to-file trim find/tail test "test:"

Windows方式

test: "test: C:/Users/thompson/Downloads/"
to-rebol-file trim find/tail test "test:"

您将始终获得%/C/Users/thompson/Downloads/

Answer 3

找到了一种有效的解决方法。

changeDirAbsolute: func [input] [
change-dir %/
change-dir input
]

如果有人有更好的解决方案，我很乐意听听！