Simple quasiquoter for the default shell

sh analog that always constructs an action of type IO () and so can always be used without type annotations

>>> [sh_|echo "hello, world!"|]
hello, world!

Quasiquoter for the default shell

Constructs polymorphic action of type Eval a => a from passed string.

Uses SHELL environment variable as path to shell executable or /bin/sh if it is unset.

>>> [sh|echo "hello, world!"|] :: IO ExitCode
ExitSuccess
>>> [sh|echo "hello, world!"|] :: IO Text
"hello, world!\n"

Haskell values can be embedded with Ruby-like syntax:

>>> let apples = 7
>>> [sh|echo "#{apples} apples!"|] :: IO Text
"7 apples!\n"

Shell's quasiquoter constructor

"Shell" here means executable that has the following API:

 <SHELL> -c <COMMAND>

e.g. sh, bash, zsh, ksh, tcsh, python, etc

Interpreter's quasiquoter constructor

"Interpreter" here means executable that has the following API:

 <INTERPRETER> -e <COMMAND>

e.g. perl, ruby, ghc, etc

Construct quasiquoter from function taking the string and producing Haskell expression.

Other kinds of quasiquoters (patterns, types or declarations quasiquoters) will fail at compile time

Construct Haskell expression for external command call

Construct Haskell expression from the string, substituting variables for their values. Variable expansion uses a ruby-like syntax