feat: new plugin piper.yazi

piper.yazi/LICENSE

@@ -0,0 +1 @@
+../LICENSE

piper.yazi/README.md

@@ -0,0 +1,64 @@
+# piper.yazi
+
+Pipe any shell command as a previewer.
+
+## Installation
+
+```sh
+ya pack -a yazi-rs/plugins:piper
+```
+
+## Usage
+
+Piper is a general-purpose previewer - you can pass any shell command to `piper` and it will use the command's output as the preview content.
+
+It accepts a string parameter, which is the shell command to be executed, for example:
+
+```toml
+# ~/.config/yazi/yaiz.toml
+[[plugin.prepend_previewers]]
+name = "*"
+run  = 'piper -- echo "$1"'
+```
+
+This will set `piper` as the previewer for all file types and use `$1` (file path) as the preview content.
+
+## Variables
+
+Available variables:
+
+- `$w`: the width of the preview area.
+- `$h`: the height of the preview area.
+- `$1`: the path to the file being previewed.
+
+## Examples
+
+Here are some configuration examples:
+
+### Preview CSV with [`bat`](https://github.com/sharkdp/bat)
+
+```toml
+[[plugin.prepend_previewers]]
+name = "*.csv"
+run  = 'piper -- bat -p --color=always "$1"'
+```
+
+### Preview Markdown with [`glow`](https://github.com/charmbracelet/glow)
+
+```toml
+[[plugin.prepend_previewers]]
+name = "*.md"
+run  = 'piper -- CLICOLOR_FORCE=1 glow -w=$w -s=dark "$1"'
+```
+
+### Preview directory tree with [`eza`](https://github.com/eza-community/eza)
+
+```toml
+[[plugin.prepend_previewers]]
+name = "*/"
+run  = 'piper -- eza -TL=3 --color=always --icons=always --group-directories-first --no-quotes "$1"'
+```
+
+## License
+
+This plugin is MIT-licensed. For more information check the [LICENSE](LICENSE) file.

piper.yazi/main.lua

@@ -0,0 +1,55 @@
+local M = {}
+
+local function fail(job, s)
+	ya.preview_widgets(job, {
+		ui.Text(string.format("`piper` plugin error: %s", s)):area(job.area):wrap(ui.Text.WRAP),
+	})
+end
+
+function M:peek(job)
+	local child, err = Command("sh")
+		:args({
+			"-c",
+			job.args[1],
+		})
+		:env("w", job.area.w)
+		:env("h", job.area.h)
+		:args({ "", tostring(job.file.url) })
+		:stdout(Command.PIPED)
+		:stderr(Command.PIPED)
+		:spawn()
+
+	if not child then
+		return fail(job, err)
+	end
+
+	local limit = job.area.h
+	local i, lines = 0, ""
+	repeat
+		local next, event = child:read_line()
+		if event == 1 then
+			return fail(job, "error occurred in stderr")
+		elseif event ~= 0 then
+			break
+		end
+
+		i = i + 1
+		if i > job.skip then
+			lines = lines .. next
+		end
+	until i >= job.skip + limit
+
+	child:start_kill()
+	if job.skip > 0 and i < job.skip + limit then
+		ya.mgr_emit("peek", { math.max(0, i - limit), only_if = job.file.url, upper_bound = true })
+	else
+		lines = lines:gsub("\t", string.rep(" ", rt.preview.tab_size))
+		ya.preview_widgets(job, {
+			ui.Text.parse(lines):area(job.area):wrap(rt.preview.wrap == "yes" and ui.Text.WRAP or ui.Text.WRAP_NO),
+		})
+	end
+end
+
+function M:seek(job) require("code"):seek(job) end
+
+return M