francoiste

expand environment variables part of a string?

9 posts in this topic

#1 ·  Posted (edited)

i need to expand environment variables in any arbitrary string.
in my case those strings mainly consist of file paths, such as:

%LocalAppData%\MyProgram\TestResults\%NUMBER_OF_PROCESSORS%\
\\myfileshare\MyProgram\UserProfiles\%USERNAME%\data\
%TEMP%\MyApp.log
%SystemDrive%\history.txt

obviously the function "EnvGet" doesn't help.

surprisingly there seems to be no simple function to perform such expansion for entire strings?
for example see the .NET method "Environment.ExpandEnvironmentVariables".

Edited by francoiste

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#2 ·  Posted (edited)

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ouch!

i had searched both, the online help and also this discussion forum - without success.

thanks for pointing me at "_WinAPI_ExpandEnvironmentStrings" !

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You can also use Opt("ExpandEnvStrings", 1)

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If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.
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Another alternative (Using EnvGet :) ):

#include<Array.au3>
local $str[5]

$str[1] = "%LocalAppData%\MyProgram\TestResults\%NUMBER_OF_PROCESSORS%\"
$str[2] = "\\myfileshare\MyProgram\UserProfiles\%USERNAME%\data\"
$str[3] = "%TEMP%\MyApp.log"
$str[4] = "%SystemDrive%\history.txt"


for $i = 1 to Ubound($str,1) - 1
    $aMatch = StringRegExp($Str[$i],"%(\w+)%",3)
    if not isArray($aMatch) then ContinueLoop
    for $x = 0 to uBound($aMatch,1) - 1
        $sReplace = StringReplace(EnvGet($aMatch[$x]),"\","\\") ;escape backslashes in regex
        $Str[$i] = StringRegExpReplace($Str[$i],"%" & $aMatch[$x] & "%",$sReplace)
    Next
Next

_ArrayDisplay($str)

 

 


give a man an application, and he'll be frustrated for the day, Teach him how to program applications and he'll be frustrated for a lifetime.

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That code is quite error prone.


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Updated: 04/09/2015

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God. Those Opts were such a stupid idea. 

Is that legit?  I am quite fond of WinTitleMatchMode, 2, leave that one :)


,-. .--. ________ .-. .-. ,---. ,-. .-. .-. .-.
|(| / /\ \ |\ /| |__ __||| | | || .-' | |/ / \ \_/ )/
(_) / /__\ \ |(\ / | )| | | `-' | | `-. | | / __ \ (_)
| | | __ | (_)\/ | (_) | | .-. | | .-' | | \ |__| ) (
| | | | |)| | \ / | | | | | |)| | `--. | |) \ | |
`-' |_| (_) | |\/| | `-' /( (_)/( __.' |((_)-' /(_|
'-' '-' (__) (__) (_) (__)

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