Add option to specify a different config file; update README and CHANGELOG

CHANGELOG.md

@@ -1,5 +1,35 @@
 # What’s New
 
+## 0.6
+
++ Added support for database URLs: you can now specify the URL of the database
+  in `site.conf` by setting `[database]url`, be it MySQL, PostgreSQL or SQLite.
++ Added experimental math support, with `markdown_katex` library. The math
+  parsing can be opted out in many ways.
++ Backlinks can now be accessed for each page.
++ Spoiler tags at beginning of line now work. Just for now.
++ Removed `Upload` table.
++ Added `PageLink` table.
+
+## 0.5
+
++ Removed support for uploads. The `/upload/` endpoint now points to an info
+  page, and the “Upload image” button and gallery from home page are now gone.
++ `markdown_strikethrough` extension is no more needed. Now there are two new
+  built-in extensions: `StrikethroughExtension` and `SpoilerExtension` (the
+  last one is buggy tho).
++ Removed support for magic words (the commands between `{{` `}}`). These
+  features are now lost: `backto`, `media` and `gallery` (easily replaceable
+  with simple Markdown).
++ Added app version to site footer.
++ Added client-side drafts (they require JS enabled).
+
+## 0.4
+
+
+## 0.3
+
+
 ## 0.2
 
 + Some code refactoring.

README.md

@@ -11,7 +11,7 @@ suitable as a community or team knowledge base.
 + Write notes on the go, using Markdown syntax
 + Any note can have its own URL
 + Revision history
-+ Stored in SQLite databases
++ Stored in SQLite/MySQL databases
 + Material Icons
 + Light/dark theme
 + Works fine even with JavaScript disabled.
@@ -19,9 +19,13 @@ suitable as a community or team knowledge base.
 ## Requirements
 
 + **Python** 3.6+.
-+ **Flask** web framework.
++ **Flask** web framework (and Flask-Login / Flask-WTF extensions).
 + **Peewee** ORM.
 
+### Optional requirements
+
+* **Markdown-KaTeX** if you want to display math inside pages.
+
 ## Caveats
 
 + All pages created are, as of now, viewable and editable by anyone, with no

app.py

@@ -32,10 +32,6 @@ try:
     from slugify import slugify
 except ImportError:
     slugify = None
-try:
-    import markdown_katex
-except ImportError:
-    markdown_katex = None
 
 __version__ = '0.6-dev'
 
@@ -48,21 +44,17 @@ FK = ForeignKeyField
 SLUG_RE = r'[a-z0-9]+(?:-[a-z0-9]+)*'
 ILINK_RE = r'\]\(/(p/\d+|' + SLUG_RE + ')/?\)'
 
-upload_types = {'jpeg': 1, 'jpg': 1, 'png': 2}
-upload_types_rev = {1: 'jpg', 2: 'png'}
-
-UPLOAD_DIR = APP_BASE_DIR + '/media'
-DATABASE_DIR = APP_BASE_DIR + "/database"
-
 #### GENERAL CONFIG ####
 
+CONFIG_FILE = os.environ.get('SALVI_CONF', APP_BASE_DIR + '/site.conf')
+
 DEFAULT_CONF = {
     ('site', 'title'):          'Salvi',
     ('database', 'directory'):  APP_BASE_DIR + "/database",
 }
 
 _cfp = ConfigParser()
-if _cfp.read([APP_BASE_DIR + '/site.conf']):
+if _cfp.read([CONFIG_FILE]):
     @lru_cache(maxsize=50)
     def _getconf(k1, k2, fallback=None, cast=None):
         if fallback is None:
@@ -80,6 +72,15 @@ else:
             fallback = DEFAULT_CONF.get((k1, k2))
         return fallback
 
+#### OPTIONAL IMPORTS ####
+
+markdown_katex = None
+try:
+    if _getconf('appearance', 'math') != 'off':
+        import markdown_katex
+except ImportError:
+    pass
+
 #### misc. helpers ####
 
 def _makelist(l):