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From: Joke de Buhr <joke@seiken.de>
To: zsh-users@zsh.org
Subject: environment variables
Date: Tue, 31 Aug 2010 17:54:25 +0200
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I'm not sure but I think the following behavior is kind of inconsistent.=20
Setting the environment works different on functions and program.

Case 1 and 2 export a variable before calling the env program. In case 2=20
copying the assignment of HELLO works as expected. Case 3 and 4 export a=20
variable before calling a function which calls the env program. In case 4=20
copying the the assignment of HELLO doesn't work because HELLO is assigned =
to=20
$HELLO but assigning HELLO to $WORLD (case 3) works.

Any reason why zsh behaves this way? Bash doesn't have this strange behavio=
r.=20



## 1: export to command (different variable)
$ WORLD=3Dworld
$ HELLO=3D$WORLD env | grep '^HELLO'
    HELLO=3Dworld

## 2: export to command (same variable)
$ HELLO=3Dworld
$ HELLO=3D$HELLO env | grep '^HELLO'
    HELLO=3Dworld


## 3: HELLO exported to shell function, same behavior as 1
$ call() { env | grep '^HELLO' }
$ WORLD=3Dworld
$ HELLO=3D$WORLD call
    HELLO=3Dworld

## 4: HELLO not exported to shell function, different from 2 and 3
$ call() { env | grep '^HELLO' }
$ HELLO=3Dworld
$ HELLO=3D$HELLO call
    HELLO=3D      ## <-- empty

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