chore: import upstream snapshot with attribution

2026-07-13 12:25:07 +08:00
commit a26e856398
1681 changed files with 296950 additions and 0 deletions
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+# Perspective CLI
+
+```bash
+Usage: perspective [options] [command]
+
+A convenient command-line client for Perspective.js.  Can convert between Perspective supported format, or host a local web server.
+
+Options:
+  -V, --version                 output the version number
+  -h, --help                    output usage information
+
+Commands:
+  convert [options] [filename]  Convert a file into a new format.  Reads from STDIN if no filename is provided
+    Options:
+    -f, --format <format>    Which output format to use:  arrow, csv, columns, json.
+    -o, --output <filename>  Filename to write to.  If not supplied, writes to STDOUT
+    -h, --help               output usage information
+
+  host [options] [filename]     Host a file on a local Websocket/HTTP server using a server-side Perspective.  Reads from STDIN if no filename is provided
+    Options:
+      -p, --port <port>  Which port to bind to (default: 8080)
+      -o, --open         Open a browser automagically
+      -h, --help         output usage information
+```