@hackage scc0.8.3
Streaming component combinators
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LicenseRef-GPL
Maintainer
blamario@protonmail.com
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Dependencies (10)
- base <5
- bytestring <1.0
- containers
- incremental-parser >=0.2.2 && <0.4
- monad-coroutine >=0.9 && <0.10
- monad-parallel Show all…
Dependents (1)
@hackage/acme-everything
Installation
If you have Cabal-Install installed, the following two commands should install the latest SCC package on your system:
cabal update
cabal install scc
If everything goes well, there should be executable named shsh. On Unix it gets installed in your $HOME/.cabal/bin/ directory by default.
Command-line Shell
To see the options supported by shsh, type shsh --help and you'll get:
Usage: shsh (-c <command> | -f <file> | -i | -s)
-c --command Execute a single command
-h --help Show help
-f file --file=file Execute commands from a script file
-i --interactive Execute commands interactively
-s --stdin Execute commands from the standard input
Here are a few simple command examples:
| Bash + GNU tools | shsh |
|---|---|
| `echo "Hello, World!"` | `echo "Hello, World!\n"` |
| `wc -c` | `count | show | concatenate` |
| `wc -l` | `foreach line then substitute x else suppress end | count | show | concatenate` |
| `grep "foo"` | `foreach line having substring "foo" then append "\n" else suppress end` |
| `sed "s:foo:bar:"` | `foreach substring "foo" then substitute "bar" end` |
| `sed "s:foo:[\\&]:"` | `foreach substring "foo" then prepend "[" | append "]" end` |
| `sed "s:foo:[\\&, \\&]:"` | `foreach substring "foo" then id; echo ", "; id end` |
Using the framework from Haskell
The shell interface is basically only syntax on top of the underlying EDSL (embedded domain-specific language) in Haskell. If you require anything more than stringing together of existing components using existing combinators, you'll need to write Haskell code.