F#FSI，更改工作目录 [英] F# FSI, Change working directory
问题描述
我在桌面的新文件夹"中有以下文件:
I have the following file located in a "New Folder" of Desktop:
// File location: "C:\Users\my_user_name\Desktop\New folder\AddOne.fs"
//
module internal AddOneModule
let AddOneFunction x = x + 1
我可以使用FSI F#Interactive在完整路径名上使用#load来访问此文件.
I can access this file by using #load on the full path name using FSI F# Interactive.
Microsoft (R) F# Interactive version 4.1
Copyright (c) Microsoft Corporation. All Rights Reserved.
For help type #help;;
> #load "C:\Users\my_user_name\Desktop\New folder\AddOne.fs";;
//[Loading C:\Users\my_user_name\Desktop\New folder\AddOne.fs]
//namespace FSI_0002
// val AddOneFunction : x:int -> int
> open AddOneModule;;
> AddOneFunction 100;;
// val it : int = 101
如何更改工作目录，以便可以使用相对路径访问文件?
How do I change the working directory so that I can access the file using relative path?
我尝试了与上面的帖子类似的方法，但是FSI仍然尝试在Temp文件夹中查找文件:
I tried something similar to the post above, but FSI still tries to find the file in the Temp folder:
(RESET FSI)
(RESET FSI)
Microsoft (R) F# Interactive version 4.1
Copyright (c) Microsoft Corporation. All Rights Reserved.
For help type #help;;
> open System;;
> Environment.CurrentDirectory <- @"C:\Users\my_user_name\Desktop\New folder";;
//val it : unit = ()
> #load "AddOne.fs";;
// #load "AddOne.fs";;
// ^^^^^^^^^^^^^^^^^
//C:\Users\my_user_name\Desktop\New folder\stdin(3,1): error FS0078: Unable to find
//the file 'AddOne.fs' in any of
// C:\Users\my_user_name\AppData\Local\Temp
谢谢您的帮助.
推荐答案
Instead of changing the working directory you may achieve the desired using a trick with __SOURCE_DIRECTORY__ built-in identifier.
首先，您需要目录结构中的某个定位点.为了便于说明，我们假设您在Windows上，并将此定位点作为用户目录，该目录由%USERPROFILE%环境变量定义.将包含以下单行代码的脚本anchorfsi.fsx放在此处:
To begin with, you need a certain anchor point in directory structure. For illustration purposes let's assume you are on Windows and let this anchor point be your user directory, which is defined by %USERPROFILE% environment variable. Place there a script anchorfsi.fsx containing the following single line of code:
#I __SOURCE_DIRECTORY__
基本上，这就是您需要做的.现在，无论您使用命令行fsi --load:%USERPROFILE%\anchorfsi.fsx从哪个位置射击fsi，都可以在脚本和交互式命令中使用相对路径.
That's basically all you need to do. Now, regardless from what location you shoot your fsi using command line fsi --load:%USERPROFILE%\anchorfsi.fsx, you can use relative paths in your scripts and in interactive commands.
在加载问题.\desktop\new folder\addone.fs时转到问题中的设置，以下屏幕截图演示了如何实现所需的目标:
Turning to the setup in your question with loading .\desktop\new folder\addone.fs, the following screenshot demonstrates achieving the desired:
请注意如何将输入的相对路径".\desktop\new folder\addone.fs"正确地映射到绝对C:\Users\gene\desktop\new folder\addone.fs 而不依赖于fsi工作目录的任何上.
Notice how the entered relative path ".\desktop\new folder\addone.fs" was correctly mapped to the absolute one C:\Users\gene\desktop\new folder\addone.fs without any dependency upon the fsi working directory whatsoever.
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