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-typos (as usual)

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Signed-off-by: Nico Schottelius <nico@bento.schottelius.org>
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Nico Schottelius 2014-01-19 20:37:40 +01:00
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blog/stdin-here-documents-templating-in-cdist.mdwn
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@ -4,7 +4,7 @@
In the shell you can see the use of In the shell you can see the use of
[here documents](http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_07_04) from time to time. They are very practical if you want to [here documents](http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_07_04) from time to time. They are very practical if you want to
feed in some data with line breaks (also referred to as feed some data with line breaks (also referred to as
"document") into another programm at the current position "document") into another programm at the current position
("here") in the shell. ("here") in the shell.
@ -37,6 +37,9 @@ offers a great reference for shell coders/users):
eof eof
Just try it - copy and paste the above code into your shell and it will
display the result of 1+1 and the contents of your home directory.
## Here documents and stdin in cdist ## Here documents and stdin in cdist
Whenever you execute a type in a manifest in cdist like this: Whenever you execute a type in a manifest in cdist like this:
@ -46,7 +49,7 @@ Whenever you execute a type in a manifest in cdist like this:
cdist also reads stdin that is supplied to the type. cdist also reads stdin that is supplied to the type.
Not every type that is shipped with cdist makes use Not every type that is shipped with cdist makes use
of stdin, but [__file](/software/cdist/man/latest/man7/cdist-type__file.html) of stdin, but [__file](/software/cdist/man/latest/man7/cdist-type__file.html)
does (always check the manpage of our types - if a type makes does (always check the manpage of the cdist types - if a type makes
use of stdin, it is documented in there). use of stdin, it is documented in there).
Indeed, if **\_\_file** sees that you use "-" as the value for the Indeed, if **\_\_file** sees that you use "-" as the value for the
@ -70,12 +73,12 @@ Beware, you could use cat like this
eof eof
but it is a but it is a
([useless use of cat (UUOC)](https://en.wikipedia.org/wiki/Cat_(Unix)#Useless_use_of_cat). [useless use of cat (UUOC)](https://en.wikipedia.org/wiki/Cat_(Unix)#Useless_use_of_cat).
## Templating using here documents in cdist ## Templating using here documents in cdist
Here documents are very powerful and they are very useful for templating. Here documents are very powerful and they are very useful for templating.
Indeed, the **__ungleich_nginx_site** type uses a template like this in its manifest: Indeed, the [__ungleich_nginx_site type](https://github.com/ungleich/cdist-examples/tree/master/type/__ungleich_nginx_site) uses a template like this in its manifest:
template_in=$__type/files/nginx-template template_in=$__type/files/nginx-template
template_out=$__object/files/nginx-template template_out=$__object/files/nginx-template
@ -141,4 +144,7 @@ The shell is indeed very powerful, you just need to know how to use it.
This is why cdist was even originally written in shell script and is This is why cdist was even originally written in shell script and is
still configured in shell script (and will continue to be so). still configured in shell script (and will continue to be so).
[[!tag cdist config unix]] If you are shell junkie, you may find more addictive drugs
[[in this blog|blog]].
[[!tag cdist config shell unix]]