asciidoctor-pdf 可以使用的参数

asciidoctor-pdf是可以把asciidotor文件生成pdf的库

它的使用方法为：

[11:38:17]--$ asciidoctor-pdf -h
Usage: asciidoctor [OPTION]... FILE...
Translate the AsciiDoc source FILE or FILE(s) into the backend output format (e.g., HTML 5, DocBook 4.5, etc.)
By default, the output is written to a file with the basename of the source file and the appropriate extension.
Example: asciidoctor -b html5 source.asciidoc

-b, --backend BACKEND set output format backend (default: html5)
-d, --doctype DOCTYPE document type to use when converting document: [article, book, manpage, inline] (default: article)
-o, --out-file FILE output file (default: based on path of input file); use - to output to STDOUT
--safe set safe mode level to safe (default: unsafe)
enables include macros, but restricts access to ancestor paths of source file
provided for compatibility with the asciidoc command
-S, --safe-mode SAFE_MODE set safe mode level explicitly: [unsafe, safe, server, secure] (default: unsafe)
disables potentially dangerous macros in source files, such as include::[]
-s, --no-header-footer suppress output of header and footer (default: false)
-n, --section-numbers auto-number section titles in the HTML backend; disabled by default
-e, --eruby ERUBY specify eRuby implementation to use when rendering custom ERB templates: [erb, erubis] (default: erb)
-C, --compact compact the output by removing blank lines. (No longer in use)
-a key[=value],key2[=value2],...,
--attribute a list of document attributes to set in the form of key, key! or key=value pair
unless @ is appended to the value, these attributes take precedence over attributes
defined in the source document
-T, --template-dir DIR a directory containing custom converter templates that override the built-in converter (requires tilt gem)
may be specified multiple times
-E, --template-engine NAME template engine to use for the custom converter templates (loads gem on demand)
-B, --base-dir DIR base directory containing the document and resources (default: directory of source file)
-D, --destination-dir DIR destination output directory (default: directory of source file)
-I, --load-path LIBRARY add a directory to the $LOAD_PATH
may be specified more than once
-r, --require LIBRARY require the specified library before executing the processor (using require)
may be specified more than once
-q, --quiet suppress warnings (default: false)
--trace include backtrace information on errors (default: false)
-v, --verbose enable verbose mode (default: false)
-t, --timings enable timings mode (default: false)
-h, --help show this message
-V, --version display the version and runtime environment (or -v if no other flags or arguments)

其中-a参数描述的非常不清楚

通过搜索源码（使用doc.attr()方法读取参数），整理了一下，主要参数包括

pdf-style : 目前提供了两个值，default 和 asciidoctor。可以通过扩展asciidoctor-pdf/data/themes下的YAML文件进行扩展

authors : 可以用该参数替换adoc文件中本来的作者

toc-title : 目录的标题，默认情况下显示“Table of Contents”

实例：

生成含有asciidoc皮肤的pdf，并且显示“目录”

 asciidoctor-pdf -a pdf-style=asciidoctor,toc-title=目录 itembank.adoc