Streaming Component Combinators Wiki
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
## 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:
<table>
<tbody>
<tr><th> Bash + GNU tools</th><th>shsh</th></tr>
<tr><td>`echo "Hello, World!"`</td><td>`echo "Hello, World!\n"`</td></tr>
<tr><td>`wc -c`</td><td>`count | show | concatenate`</td></tr>
<tr><td>`wc -l`</td><td>`foreach line then substitute x else suppress end | count | show | concatenate`</td></tr>
<tr><td>`grep "foo"`</td><td>`foreach line having substring "foo" then append "\n" else suppress end`</td></tr>
<tr><td>`sed "s:foo:bar:"`</td><td>`foreach substring "foo" then substitute "bar" end`</td></tr>
<tr><td>`sed "s:foo:[\\&]:"`</td><td>`foreach substring "foo" then prepend "[" | append "]" end`</td></tr>
<tr><td>`sed "s:foo:[\\&, \\&]:"`</td><td>`foreach substring "foo" then id; echo ", "; id end`</td></tr>
</tbody>
</table>
## 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.
|