Use either TERM or TERM_PROGRAM to detect wezterm

CHANGELOG.md

@@ -8,6 +8,11 @@ To publish a new release run `scripts/release` from the project directory.
 
 ## [Unreleased]
 
+### Changed
+- WezTerm is now detected by `TERM` and `TERM_PROGRAM` environment variables (see [GH-186]).
+
+[GH-186]: https://github.com/lunaryorn/mdcat/pull/186
+
 ## [0.23.1] – 2021-07-14
 
 ### Changed

mdcat.1.adoc

@@ -102,7 +102,8 @@ If run as `mdless` or if `--paginate` is given and the pager fails to start mdca
 == Environment
 
 TERM::
-    If this variable is `xterm-kitty`, assume that the terminal is Kitty.
+    If this variable is `wezterm`, mdcat assumes that the terminal is WezTerm. By default WezTerm does not set TERM to wezterm but mdcat can still detect it trough TERM_PROGRAM.
+    If this variable is `xterm-kitty`, mdcat assumes that the terminal is Kitty.
 
 TERM_PROGRAM::
     If this variable is `iTerm.app`, mdcat assumes that the terminal is iTerm2.

src/terminal.rs

@@ -83,6 +83,7 @@ fn get_vte_version() -> Option<(u8, u8)> {
 /// Checks if the current terminal is WezTerm.
 fn is_wezterm() -> bool {
     std::env::var("TERM_PROGRAM").map_or(false, |value| value == "WezTerm")
+        || std::env::var("TERM").map_or(false, |value| value == "wezterm")
 }
 
 impl TerminalCapabilities {