Merge branch 'tova' into autoconfig

[git.ikiwiki.info.git] / doc / plugins / write / tutorial.mdwn

diff --git a/doc/plugins/write/tutorial.mdwn b/doc/plugins/write/tutorial.mdwn
index c8cb4a4efe65249be97c87d79321bfd54a64ca83..5b810a18faea4f6460635fcd7e06f58bce56ac57 100644 (file)
--- a/doc/plugins/write/tutorial.mdwn
+++ b/doc/plugins/write/tutorial.mdwn
@@ -5,18 +5,18 @@ What should the plugin do? Let's make it calculate and output the Fibonacci
 sequence. To output the next number in the sequence, all a user has to do
 is write this on a wiki page:
 
 sequence. To output the next number in the sequence, all a user has to do
 is write this on a wiki page:
 

-       [[fib ]]
+       [[!fib ]]

 
 

-When the page is built, that'll be replaced by the next number in the
-sequence.
+When the page is built, the [[ikiwiki/PreProcessorDirective]] will be
+replaced by the next number in the sequence.

 
 

-Most of ikiwiki's plugins are written in perl, and it's currently easiest
-to write them in perl. So, open your favorite text editor, and start
+Most of ikiwiki's plugins are written in Perl, and it's currently easiest
+to write them in Perl. So, open your favorite text editor and start

 editing a file named "fib.pm".
 
        #!/usr/bin/perl
 
 editing a file named "fib.pm".
 
        #!/usr/bin/perl
 

-This isn't really necessary, since fib.pm will be a perl module, but it's
+This isn't really necessary, since fib.pm will be a Perl module, but it's

 nice to have. Since it's a module, the next bit is this. Notice the "fib"
 at the end, matching the "fib" in the filename.
 
 nice to have. Since it's a module, the next bit is this. Notice the "fib"
 at the end, matching the "fib" in the filename.
 


@@ -31,7 +31,7 @@ important one is the IkiWiki module.
 
 Ok, boilerplate is out of the way. Now to add the one function that ikiwiki
 expects to find in any module: `import`. The import function is called when
 
 Ok, boilerplate is out of the way. Now to add the one function that ikiwiki
 expects to find in any module: `import`. The import function is called when

-the module is first loaded, and what modules typically do with it is
+the module is first loaded; what modules typically do with it is

 register hooks that ikiwiki will call later.
 
        sub import {
 register hooks that ikiwiki will call later.
 
        sub import {


@@ -44,7 +44,7 @@ that "fib" has shown up again. It doesn't actually have to match the module
 name this time, but it generally will. This "fib" is telling ikiwiki what
 kind of PreprocessorDirective to handle, namely one that looks like this:
 
 name this time, but it generally will. This "fib" is telling ikiwiki what
 kind of PreprocessorDirective to handle, namely one that looks like this:
 

-       [[fib ]]
+       [[!fib ]]

 
 Notice the `\&preprocess`? This is how you pass a reference to a function,
 and the `preprocess` function is the one that ikiwiki will call to expand
 
 Notice the `\&preprocess`? This is how you pass a reference to a function,
 and the `preprocess` function is the one that ikiwiki will call to expand


@@ -56,19 +56,19 @@ the PreprocessorDirective. So, time to write that function:
        }
 
 Whatever this function returns is what will show up on the wiki page.
        }
 
 Whatever this function returns is what will show up on the wiki page.

-Since this is the Fibonachi sequence, returning 1 will be right for the
+Since this is the Fibonacci sequence, returning 1 will be right for the

 first two calls anways, so our plugin isn't _too_ buggy. ;-) Before we fix
 the bug, let's finish up the plugin.
 
        1
 
 first two calls anways, so our plugin isn't _too_ buggy. ;-) Before we fix
 the bug, let's finish up the plugin.
 
        1
 

-Always put this as the last line in your perl modules. Perl likes it.
+Always put this as the last line in your Perl modules. Perl likes it.

 
 Ok, done! If you save the plugin, you can copy it to a place your ikiwiki
 looks for plugins (`/usr/share/perl5/IkiWiki/Plugins/` is a good bet; see
 [[install]] for the details of how to figure out where to
 install it). Then configure ikiwiki to use the plugin, and you're ready to
 
 Ok, done! If you save the plugin, you can copy it to a place your ikiwiki
 looks for plugins (`/usr/share/perl5/IkiWiki/Plugins/` is a good bet; see
 [[install]] for the details of how to figure out where to
 install it). Then configure ikiwiki to use the plugin, and you're ready to

-insert at least the first two numbers of the Fibonachi sequence on web
+insert at least the first two numbers of the Fibonacci sequence on web

 pages. Behold, the power of ikiwiki! ...
 
 ----
 pages. Behold, the power of ikiwiki! ...
 
 ----


@@ -76,7 +76,7 @@ pages. Behold, the power of ikiwiki! ...
 You could stop here, if you like, and go write your own plugin that does
 something more useful. Rather than leave you with a broken fib plugin
 though, this tutorial will go ahead and complete it. Let's add a simple
 You could stop here, if you like, and go write your own plugin that does
 something more useful. Rather than leave you with a broken fib plugin
 though, this tutorial will go ahead and complete it. Let's add a simple

-Fibonachi generating function to the plugin. This is right out of a
+Fibonacci generating function to the plugin. This is right out of a

 textbook.
 
        sub fib {
 textbook.
 
        sub fib {


@@ -98,7 +98,7 @@ And let's change the `preprocess` sub to use it:
 
 Feel free to try it out with a simple page like this:
 
 
 Feel free to try it out with a simple page like this:
 

-       [[fib ]], [[fib ]], [[fib ]], [[fib ]], [[fib ]]
+       [[!fib ]], [[!fib ]], [[!fib ]], [[!fib ]], [[!fib ]]

 
 Looks like it works ok, doesn't it? That creates a page that lists:
 
 
 Looks like it works ok, doesn't it? That creates a page that lists:
 


@@ -139,7 +139,7 @@ Ok, one more enhancement. Just incrementing the numbers is pretty boring.
 It would be nice to be able to jump directly to a given point in the
 sequence:
 
 It would be nice to be able to jump directly to a given point in the
 sequence:
 

-       \[[fib seed=20]], [[fib ]], [[fib ]]
+       \[[!fib seed=20]], [[!fib ]], [[!fib ]]

 
 Just insert these lines of code inside `preprocess`, in the appropriate
 spot:
 
 Just insert these lines of code inside `preprocess`, in the appropriate
 spot:


@@ -169,7 +169,7 @@ be a guard on how high it will go.
                }
                my $num=$last{$page}++;
                if ($num > 25) {
                }
                my $num=$last{$page}++;
                if ($num > 25) {

-                       return "[[fib will only calculate the first 25 numbers in the sequence]]";
+                       error "can only calculate the first 25 numbers in the sequence";

                }
                return fib($num);
        }
                }
                return fib($num);
        }


@@ -182,7 +182,7 @@ does for numbers less than 1. Or for any number that's not an integer. In
 either case, it will run forever. Here's one way to fix that:
 
                if (int($num) != $num || $num < 1) {
 either case, it will run forever. Here's one way to fix that:
 
                if (int($num) != $num || $num < 1) {

-                       return "[[fib positive integers only, please]]";
+                       error "positive integers only, please";

                }
 
 As these security problems have demonstrated, even a simple input from the
                }
 
 As these security problems have demonstrated, even a simple input from the