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I want to invoke shell function in string. Here is my use case:

function envfoo() {
    env ENV_FOO=foo $@
}
function envbar() {
    env ENV_BAR=bar $@
}

$ envfoo env |egrep ENV_
ENV_FOO=foo
$ envbar env |egrep ENV_
ENV_BAR=bar
$ envfoo envbar env |egrep ENV_
env: envbar: No such file or directory
# expected result: ENV_FOO=foo and ENV_BAR=bar lines

Here I want envfoo to execute envbar shell function. How can I do it?

Say that is opposite of command which ignores shell function and finds real command.

Maybe I gave a wrong example. I want to combine multiple shell functions like actual executables. A real case goes like this:

function be() {
    bundle exec $@
}

function envstg() {
    env RAILS_ENV=staging $@
}

$ be rails server
# launches Rails server

$ envstg be rails server
env: be: No such file or directory

Here be isn't expanded into bundle exec. How can I expand them?

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1  
Why don't use (envbar && envfoo) | grep ENV_ ? –  cuonglm Sep 22 '14 at 3:52
    
Maybe I gave a wrong example. –  knagano Sep 22 '14 at 9:39

1 Answer 1

up vote 0 down vote

I don't know why you have the env command there, but it works fine if you remove it:

$ function be() {
>     echo "$@"
> }

$ function envstg() {
>     RAILS_ENV=staging "$@"
> }
$ be rails server
rails server
$ envstg be rails server
rails server
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