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#lang scribble/manual
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@(require "mb-tools.rkt" scribble/eval pollen/world (for-label (except-in racket ...) pollen/world))
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@(define my-eval (make-base-eval))
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@(my-eval `(require pollen pollen/file))
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@title[#:tag "raco-pollen"]{Using @exec{raco pollen}}
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Racket provides centralized command-line options through @exec{raco} (short for @exec{racket command}, see @other-doc['(lib "scribblings/raco/raco.scrbl")]).
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Once you install Pollen, you can access the following Pollen-specific commands through @racket[raco] using the subcommand @exec{raco pollen}.
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@section{Making sure @exec{raco pollen} works}
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Open a terminal window and type:
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@terminal{
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> raco pollen test}
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If @exec{raco pollen} is installed correctly, you'll see:
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@terminal{raco pollen is installed correctly}
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But if you get:
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@terminal{raco: Unrecognized command: pollen}
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You'll need to fix the problem before proceeding, most likely by reinstalling Pollen (see @secref["Installation" #:doc '(lib "pollen/scribblings/pollen.scrbl")]).
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If your error is like this:
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@terminal{Unrecognized command: raco}
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You have a deeper problem with your Racket installation (often a misconfiguration of @code{PATH}).
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@section{@exec{raco pollen}}
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Same as @exec{raco pollen help}.
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@section{@exec{raco pollen help}}
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Displays a list of available commands.
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@section{@exec{raco pollen start}}
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Start the project server from the current directory using the default port, which is the value of the parameter @racket[world:current-server-port] (by default, port @(format "~a" world:default-port)).
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This command can be invoked with two optional arguments.
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@racket[raco pollen start _path] will start the project server in @racket[_path] rather than the current directory.
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@terminal{
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> raco pollen start ~/path/to/project/}
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@racket[raco pollen start _path _port] will start the project server in @racket[_path] using @racket[_port] rather than @racket[world:current-server-port]. This is useful if you want to have multiple project servers running simultaneously.
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@terminal{
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> raco pollen start ~/path/to/project/
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> raco pollen start ~/path/to/project/scribblings 8088}
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If you want to start in the current directory but with a different port, use @litchar{.} as the path:
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@terminal{
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> raco pollen start . 8088}
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@section{@exec{raco pollen render}}
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Render all preprocessor source files and then all pagetree files found in the current directory. If none of these files are found, a pagetree will be generated for the directory (which will include all source files) and then rendered.
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This command can be invoked with extra arguments.
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@racket[raco pollen render _directory] will perform the render described above, but in the specified directory.
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Alternatively, the command can take a variable number of path arguments. @racket[raco pollen render _path ...] will render only the paths specified in @racket[_path ...]. Consistent with the usual command-line idiom, this can be a single path, a list of paths, or a pattern:
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@terminal{
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> raco pollen render foo.html.pm
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> raco pollen render foo.html.pm bar.html.pm zam.css.pp
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> raco pollen render *.html.pm}
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Paths can also be specified as output rather than input paths, and the corresponding source paths will be discovered:
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@terminal{
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> raco pollen render foo.html
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> raco pollen render foo.html bar.html zam.css}
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The optional @exec{-t} or @exec{--target} switch specifies the render target for multi-output source files. If the target is omitted, the renderer will use whatever target appears first in @racket[(world:current-poly-targets)].
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@terminal{
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> raco pollen render -t pdf foo.poly.pm}
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See also @seclink["raco-pollen-render-poly"].
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@bold{Warning}: In all cases, the newly rendered output file will overwrite any previous output file.
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@section{@exec{raco pollen publish}}
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Make a copy of the project directory on the desktop, but without any source files or other Pollen-related files. (This function is pretty lame, and I invite suggestions for improvement.)
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@racket[raco pollen publish _project-dir] will publish the project in @racket[_project-dir] onto the desktop in a folder called @racket[publish]. @bold{Warning}: if @racket[publish] already exists on the desktop, it will be overwritten.
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@racket[raco pollen publish _project-dir _dest-dir] will publish the project in @racket[_project-dir] to @racket[_dest-dir] rather than the desktop. @bold{Warning}: if @racket[_dest-dir] already exists, it will be overwritten by the newly published directory.
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If you're already in your project directory and want to publish somewhere other than the desktop, use @racket[raco pollen publish _. _dest-dir].
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You can determine the files that get filtered out in a particular project by using @racket[world:current-unpublished-path?].
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@section{@exec{raco pollen setup}}
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Finds Pollen source files in the current directory, compiles them, and loads the results into the @seclink["Cache" #:doc '(lib "pollen/scribblings/pollen.scrbl")]. This will give you the snappiest performance during an interactive session with the project server.
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Can also be invoked as @racket[raco pollen setup _directory], which will set up a different project @racket[_directory].
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@section{@exec{raco pollen reset}}
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Resets Pollen's @seclink["Cache" #:doc '(lib "pollen/scribblings/pollen.scrbl")] by deleting the cache directories.
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Can also be invoked as @racket[raco pollen reset _directory], which will reset a different project @racket[_directory].
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@section{@exec{raco pollen version}}
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Would you believe this prints the Pollen version number.
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@section{The @exec{POLLEN} environment variable}
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Pollen recognizes a @exec{POLLEN} environment variable on the command line, which can be used to pass through any value you like. This value can be used within your project files with @racket[(getenv "POLLEN")], which if not set, returns @racket[#f]. Take this file, for instance:
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@fileblock["test.txt.pp" @codeblock{
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#lang pollen
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Result is ◊or[(getenv "POLLEN")]{nothing}
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}]
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The @exec{POLLEN} environment variable will change how it's rendered:
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@terminal{
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> raco pollen render test.txt ; cat test.txt
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rendering test.txt.pp
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rendering: /test.txt.pp as /test.txt
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Result is nothing
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> POLLEN=DEBUG raco pollen render test.txt ; cat test.txt
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rendering test.txt.pp
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rendering: /test.txt.pp as /test.txt
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Result is DEBUG
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}
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