feat(treewide): major rework

Unfortunately, I got a bit carried away after realizing that the initial
change would be a breaking change anyways, so I am now left with a huge
diff which can't be really split up. Please excuse this.

The changes are as follows:

* Rename blogpost → entry (breaking): make_blogpost → make_entry,
  blog_post → blog_entry etc.
* Rename blogdefs.h → core.h (breaking)
* Split functions from main.c into cgiutil and entry
* entry / make_entry:
  * Use modification time instead of time in filename (breaking)
  * Rename timestamp → time (breaking)
  * Add field title (currently basename, breaking)
  * Add field text and text_size which can be use to store the
    contents of the associated file using mmap (fields default to
    NULL and -1 respectively, breaking)
  * Do PATH_INFO resolving and on disk path building in make_entry
    instead of in blog_index / blog_rss / blog_entry
* entry_get_text: add function to mmap an entry's file into the
  structure
* free_entry: also unmap file if present
* make_index: Add function to build an array of entries reverse sorted
  by time
* blog_index / blog_rss:
  * use make_index instead of scandir and make_blogpost_from_dirent
  * (blog_rss) use entry_get_text to pass the template the text of
    the entry.
* template:
  * template_post_index_entry → template_index_entry (breaking)
  * template_post_single_entry → template_single_entry (breaking)
  * replace template_error_404() with generic template_error(status)
* templates/simple.c:
  * Use xml library instead of printf
  * Use entry.text instead of opening the file in the template
  * include CSS if BLOG_CSS is set in config.h
* document internal and public interfaces using doxygen
* build process:
  * build object files individually
  * build process configuration in config.mk (breaking)
  * support templates in arbitrary locations
  * build default config.h if it's missing
  * add install phase
  * Rename target to sternenblog.cgi (breaking)

1 files changed, 20 insertions, 0 deletions

diff --git a/config.mk b/config.mk
new file mode 100644
index 0000000..e53fc72
--- /dev/null
+++ b/config.mk
@@ -0,0 +1,20 @@
+# your template, must be a single .c file with the extension omitted
+TEMPLATE = templates/simple
+
+PREFIX = /usr/local
+WEB_PATH = /share/sternenblog
+MAN_PATH = /share/man
+DOC_PATH = /share/doc/sternenblog
+
+INSTALL = install
+RM = rm
+CP = cp
+
+# convert from imagemagick
+CONVERT = convert
+
+CC = gcc
+CFLAGS = -Wall -pedantic --std=c99 -Os
+
+# debugging
+# CFLAGS = -Wall -pedantic --std=c99 -ggdb -Og