add README; add sanity checks to build script

README.md

@@ -0,0 +1,107 @@
+# about
+
+`eureka` is a simple static site generator based on the generator for [100r.co](https://100r.co).
+
+`eureka` simply reads `.htm` files in `./inc/` and applies a template around them, giving them a `<header>`, `<nav>`, and `<footer>`. The `<nav>` content is also located in `inc/meta.nav.htm`, and, contrary to `100r.co`'s engine, special rules are applied when templating around it to render the landing page (`index.html`).
+
+In addition, there is a thumbnailer that uses [ImageMagick](https://www.imagemagick.org) to create low-bandwidth thumbnails at 500px wide and 16 colors, and store them in a subdirectory alongside the full size images. `eureka` has a function to automatically replace the inline images within pages with the thumbnails, but leave the links they point to untouched.
+
+Eureka also parses a [twtxt](https://twtxt.readthedocs.io/en/latest/) file at `SITEROOT/twtxt.txt` and displays the latest three entrires on the front page. It expects the file to be in descending order.
+
+# usage
+
+1. Run `./build.sh` to copy the default config header to `config.h` and create the `inc` directory (and `meta.nav.htm`) if it doesn't exist.
+2. Edit your config; see below for details.
+3. Create your CSS and other assets if necessary and put them in your `SITEROOT`.
+4. Edit your `inc/meta.nav.htm` to create your `nav` structure (see the markup section below).
+5. Create a new page, eg `inc/my_first_page.htm` (see the markup section below).
+6. Edit your `inc/meta.nav.htm` again to reference your new page.
+7. Run `./build.sh` again! You will be warned of any orphaned files.
+
+If you run into issues with your markup crashing `eureka`, edit the `build.sh` file to uncomment the linux debug build line and comment the fast build; this will show you a stack trace of where you are running into buffer overflows, and give you a hint of where your markup is messed up. To see the individual file that has the error, also uncomment the line in `fpinject()` that prints the file names.
+
+# markup
+
+There is a markup language which makes writing long blog posts, memex entries, etc easier by reducing the need for typing out HTML tags:
+
+```
+// shorthand for crosslinking (assuming the file is inc/page_name.htm)
+{page name}
+
+// shorthand for transclusion (assuming the file is inc/page_name.htm)
+{/page name}
+
+// shorthand for arbitary link
+{*destination url|text}
+
+// shorthand for an image you can click to see the full sized version
+{:anchor-id|image url|alt text}
+
+// shorthand for an image with arbitrary link destination
+{?anchor-id|destination url|image url|alt text}
+
+// shorthand for an audio player
+{_/path/to/media}
+
+// shorthand for paragraphs, can embed other markup inside it
+{&paragraph text {with a link} {@and some bold text}}
+
+// shorthand for ordered lists, can embed other markup inside it
+{#
+  {-item one}
+  {-item two}
+  {-item three}
+}
+
+// shorthand for unordered lists, can embed other markup inside it
+{,
+  {-item one}
+  {-item two}
+  {-item three}
+}
+
+// shorthand for bold
+{@bold text}
+
+// shorthand for italic
+{~italic text}
+
+// shorthand for code
+{`short code}
+
+// shorthand for pre
+{$longer code}
+
+// shorthand for quote
+{'short quote}
+
+// shorthand for blockquote
+{>longer quote}
+
+// shorthand for strikethrough
+{\crossed-out text}
+
+// shorthand for level 3 heading 
+{!heading text}
+
+// shorthand for level 4 heading
+{.heading text}
+```
+
+# configuration
+
+The following macros are available in `config.h` to customize to your liking.
+
+  - **LEXICON_SIZE**: max size of the `Lexicon`, corresponds to the number of pages `eureka` can keep track of
+  - **TAG\_BODY\_SIZE**: max size for an individual markup body (ie, a markup token as above, minus the curly brackets and the rune), in bytes
+  - **NAME**: the title of the site
+  - **DOMAIN**: currently unused
+  - **LOGO**: currently unused
+  - **ABOUT**: HTML content for the front page, placed between `<header>` and `<nav>`
+  - **CONTACT**: the contact info line at the bottom of every page (except the front page, where it would typically already be in **@ABOUT**
+  - **FOOTER**: arbitrary footer HTML
+  - **LICENSE**: the license link at the bottom of every page
+  - **SITEROOT**: the path where the rendered HTML is placed
+  - **MAINCSS** and **FRONTCSS**: to differentiate styles used for the landing page and the rest of the site
+
+

build.sh

@@ -5,6 +5,16 @@ if [ ! -e config.h ]; then
   cp config.def.h config.h
 fi
 
+# ensure sane environment
+
+if [ ! -d inc ]; then
+  mkdir inc
+fi
+
+if [ ! -e inc/meta.nav.htm ]; then
+  touch inc/meta.nav.htm
+fi
+
 # Lint
 clang-format -i main.c config.h