Color output on screen256 color terminals

etcwilde · etcwilde · commit c249d104a1f8 · 2025-05-30T15:44:38.000-07:00
The Swift driver only emitted color on xterm-256color terminals.
screen-256color terminals also have the ability to output colors so we
can colorize the output there too.

Also fixing the build deprecation warning on `ProcessEnv.vars`.
diff --git a/Sources/swift-help/main.swift b/Sources/swift-help/main.swift
@@ -93,7 +93,8 @@ struct SwiftHelp: ParsableCommand {
   }
 
   func printIntro() {
-    let is256Color = ProcessEnv.vars["TERM"] == "xterm-256color"
+    let is256Color = ProcessEnv.block["TERM"] == "xterm-256color" ||
+      ProcessEnv.block["TERM"] == "screen-256color"
     let orangeRed = is256Color ? "\u{001b}[1;38;5;196m" : ""
     let plain = is256Color ? "\u{001b}[0m" : ""
     let plainBold = is256Color ? "\u{001b}[1m" : ""

Original file line number	Diff line number	Diff line change
`@@ -93,7 +93,8 @@ struct SwiftHelp: ParsableCommand {`
`93`	`93`	`}`
`94`	`94`
`95`	`95`	`func printIntro() {`
`96`		`- let is256Color = ProcessEnv.vars["TERM"] == "xterm-256color"`
	`96`	`+ let is256Color = ProcessEnv.block["TERM"] == "xterm-256color" \|\|`
	`97`	`+ ProcessEnv.block["TERM"] == "screen-256color"`
`97`	`98`	`let orangeRed = is256Color ? "\u{001b}[1;38;5;196m" : ""`
`98`	`99`	`let plain = is256Color ? "\u{001b}[0m" : ""`
`99`	`100`	`let plainBold = is256Color ? "\u{001b}[1m" : ""`