Add some of missing type annotations and assertions

[tt.git] / README.md

diff --git a/README.md b/README.md
index 0a75994..10b615a 100644 (file)
--- a/README.md
+++ b/README.md
@@ -11,29 +11,103 @@ This means unlimited possibilities for ad-hoc, interesting filtering
 combinations. Especially when paired with
 [process substitution](https://en.wikipedia.org/wiki/Process_substitution).
 
-![Screenshot](screenshot-multi.jpg)
+### long format (default)
+![Screenshot](screenshot-long.jpg)
+
+### short format (CLI option: -s)
+![Screenshot](screenshot-short.jpg)
 
 
 instructions
 ------------
 
 ### requirements
+
+#### manual
 [Racket](https://download.racket-lang.org/)
 
+#### package manager
+- Void Linux: `xbps-install racket`
+- Debian: `apt install racket`
+
 ### installation
-1. Run `make install` or `raco pkg install`
-2. Add `$HOME/.racket/7.9/bin` to your `$PATH`
-   (replacing `7.9` with whatever version you have installed)
+`make build && make install` will build and copy `tt` binary into
+`$PREFIX/bin`, where `$PREFIX` defaults to `$HOME`.
+
+### configuration
+Put your `<nick>` and `<uri>` into `~/.tt/me`. For example, mine is:
+
+```
+$ cat ~/.tt/me
+xandkar https://xandkar.net/twtxt.txt
+```
+It will be used to fill the `User-Agent` header, so that others can tell you're
+reading their twtxts and perhaps read yours. This isn't strictly necessary and
+if omitted, you'll stay anonymous.
 
 ### usage
-`tt (FOLLOW-FILE)`
+
+               $ tt --help
+               tt [ <option> ... ] <command> [<args>] ...
+                where <option> is one of
+                       -d, --debug : Enable debug log level.
+
+                and <command> is one of
+                r, read     : Read the timeline (offline operation).
+                d, download : Download the timeline.
+                u, upload   : Upload your twtxt file (alias to execute ~/.tt/upload).
+                c, crawl    : Discover new peers mentioned by known peers (offline operation).
+
+                       --help, -h : Show this help
+                       -- : Do not treat any remaining argument as a switch (at this level)
+                Multiple single-letter switches can be combined after one `-'; for
+                       example: `-h-' is the same as `-h --'
+
+#### download
+peers' feeds from the Internet:
+
+               $ tt d -h
+               tt download [ <option> ... ] [<file-paths>] ...
+                where <option> is one of
+                       -j <njobs>, --jobs <njobs> : Number of concurrent jobs.
+                       --help, -h : Show this help
+                       -- : Do not treat any remaining argument as a switch (at this level)
+                Multiple single-letter switches can be combined after one `-'; for
+                       example: `-h-' is the same as `-h --'
+
+#### read
+your timeline:
+
+               $ tt r -h
+               tt read [ <option> ... ] [<file-paths>] ...
+                where <option> is one of
+                       -r, --rev : Reverse displayed timeline order.
+               / -s, --short : Short output format
+               \ -l, --long : Long output format
+                       --help, -h : Show this help
+                       -- : Do not treat any remaining argument as a switch (at this level)
+                /|\ Brackets indicate mutually exclusive options.
+                Multiple single-letter switches can be combined after one `-'; for
+                       example: `-h-' is the same as `-h --'
+
+`FOLLOW-FILE` contains lines with space-separated nick and twtxt.txt URI, like:
+
+```
+xandkar https://xandkar.net/twtxt.txt
+```
+
+If omitted, `FOLLOW-FILE` defaults to `~/.tt/peers`.
+
+#### other commands
+
+    tt <command> -h
 
 
 notes
 -----
 
 ### LWW downloads
-Downloaded timelines are stored in `~/.tt/cache/<SHA1_OF_URI>`, but no attempt
-is made to preserve the previously-downloaded messages - each download
-overrites the previous. One of the implications is that authors can edit/delete
-history without you noticing.
+Downloaded timelines are stored in `~/.tt/cache/objects/<URL_ENCODED_URL>`, but
+no attempt is made to preserve the previously-downloaded messages - each
+download overrites the previous. One of the implications is that authors can
+edit/delete history without you noticing.