probe command

Cargo.lock

@@ -945,6 +945,7 @@ dependencies = [
  "pile-dataset",
  "pile-toolbox",
  "serde",
+ "serde_json",
  "signal-hook",
  "tokio",
  "toml",

crates/pile/Cargo.toml

@@ -24,3 +24,4 @@ tracing-indicatif = { workspace = true }
 signal-hook = { workspace = true }
 anstyle = { workspace = true }
 toml = { workspace = true }
+serde_json = { workspace = true }

crates/pile/src/command/mod.rs

@@ -6,6 +6,7 @@ mod check;
 mod index;
 mod init;
 mod lookup;
+mod probe;
 
 use crate::GlobalContext;
 
@@ -34,6 +35,12 @@ pub enum SubCommand {
 		#[command(flatten)]
 		cmd: lookup::LookupCommand,
 	},
+
+	/// Print all metadata from an item
+	Probe {
+		#[command(flatten)]
+		cmd: probe::ProbeCommand,
+	},
 }
 
 impl CliCmdDispatch for SubCommand {
@@ -43,6 +50,7 @@ impl CliCmdDispatch for SubCommand {
 			Self::Check { cmd } => cmd.start(ctx),
 			Self::Index { cmd } => cmd.start(ctx),
 			Self::Lookup { cmd } => cmd.start(ctx),
+			Self::Probe { cmd } => cmd.start(ctx),
 		}
 	}
 }

crates/pile/src/command/probe.rs

@@ -0,0 +1,42 @@
+use anyhow::{Context, Result};
+use clap::Args;
+use pile_config::Label;
+use pile_dataset::{
+	FileItem,
+	extract::{MetaExtractor, PileValue},
+};
+use pile_toolbox::cancelabletask::{CancelFlag, CancelableTaskError};
+use std::{fmt::Debug, path::PathBuf, rc::Rc};
+
+use crate::{CliCmd, GlobalContext};
+
+#[derive(Debug, Args)]
+pub struct ProbeCommand {
+	/// The file to probe
+	file: PathBuf,
+}
+
+impl CliCmd for ProbeCommand {
+	#[expect(clippy::print_stdout)]
+	#[expect(clippy::unwrap_used)]
+	async fn run(
+		self,
+		_ctx: GlobalContext,
+		_flag: CancelFlag,
+	) -> Result<i32, CancelableTaskError<anyhow::Error>> {
+		let item = FileItem {
+			path: self.file.clone(),
+			source_name: Label::new("probe-source").unwrap(),
+		};
+
+		let value = PileValue::Extractor(Rc::new(MetaExtractor::new(&item)));
+		let json = value
+			.to_json()
+			.with_context(|| format!("while extracting {}", self.file.display()))?;
+
+		let json = serde_json::to_string_pretty(&json).unwrap();
+
+		println!("{json}");
+		return Ok(0);
+	}
+}