commit 5160a7637b60dc45cc93836b4749a8b929b183de
Author: Alex Auvolat <alex@adnab.me>
Date:   Wed Nov 3 23:26:37 2021 +0100

    First commit

diff --git a/.gitignore b/.gitignore
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index 0000000..ea8c4bf
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diff --git a/Cargo.lock b/Cargo.lock
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..47d53b3
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "sledcli"
+version = "0.1.0"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+sled = "0.34.7"
+rustyline = "9.0"
+structopt = { version = "0.3", default-features = false }
+hexdump = "0.1"
+utf-8 = "0.7"
+anyhow = "1.0"
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..a2de0e1
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,162 @@
+use std::path::PathBuf;
+use std::ops::Deref;
+
+use anyhow::Result;
+
+use rustyline::error::ReadlineError;
+use rustyline::Editor;
+
+use structopt::StructOpt;
+
+use sled::IVec;
+
+#[derive(StructOpt, Debug)]
+#[structopt(name = "sledcli")]
+struct Opt {
+	/// Path to Sled database
+	#[structopt(name="path")]
+	path: PathBuf,
+}
+
+enum DisplayMode {
+	TryString,
+	HexDump,
+	Mixed,
+}
+
+struct State {
+	db: sled::Db,
+	tree: sled::Tree,
+	displaymode: DisplayMode,
+}
+
+fn main() {
+	let opt = Opt::from_args();
+	let db = sled::Config::default()
+		.path(&opt.path)
+		.open()
+		.expect("Unable to open database");
+
+	let tree: sled::Tree = db.deref().clone();
+	let mut state = State {
+		db,
+		tree,
+		displaymode: DisplayMode::Mixed,
+	};
+
+	let mut readline = Editor::<()>::new();
+    loop {
+        let lineread = readline.readline(&format!("{}> ", try_string(&state.tree.name())));
+        match lineread {
+            Ok(line) => {
+                readline.add_history_entry(line.as_str());
+				if let Err(e) = do_command(&line, &mut state) {
+					println!("Error: {}", e);
+				}
+            },
+            Err(ReadlineError::Interrupted) => {
+				println!("^C");
+				continue;
+            },
+            Err(ReadlineError::Eof) => {
+                break
+            },
+            Err(err) => {
+                println!("Readline error: {:?}", err);
+                break
+            }
+        }
+    }
+}
+
+fn try_string(input: &sled::IVec) -> String {
+    let mut string = String::new();
+	utf8::LossyDecoder::new(|s| string.push_str(s)).feed(input);
+	string
+}
+
+fn do_command(line: &str, state: &mut State) -> Result<()> {
+	let parts = line.split(' ').filter(|part| part.len() > 0).collect::<Vec<_>>();
+	if parts.is_empty() {
+		return Ok(());
+	}
+
+	match &parts[..] {
+		["ls"] => {
+			let mut names = state.db.tree_names();
+			names.sort();
+			for name in names {
+				println!("{}", try_string(&name));
+			}
+		}
+		["cd", treename] => {
+			if state.db.tree_names().iter().any(|t| t == treename.as_bytes()) {
+				state.tree = state.db.open_tree(treename.as_bytes())?;
+			} else {
+				println!("Tree {} does not exist", treename);
+			}
+		}
+		["hex"] => {
+			state.displaymode = DisplayMode::HexDump;
+		}
+		["str"] => {
+			state.displaymode = DisplayMode::TryString;
+		}
+		["mix"] => {
+			state.displaymode = DisplayMode::Mixed;
+		}
+		["keys"] => {
+			for (i, pair) in state.tree.iter().enumerate() {
+				if i >= 20 {
+					println!("...");
+					break;
+				}
+				let (k, _v) = pair?;
+				state.displaymode.print_key(&k);
+			}
+		}
+		["pairs"] => {
+			for (i, pair) in state.tree.iter().enumerate() {
+				if i >= 20 {
+					println!("...");
+					break;
+				}
+				let (k, v) = pair?;
+				state.displaymode.print_pair(&k, &v);
+			}
+		}
+		bad_cmd => println!("Unrecognized command: {:?}", bad_cmd),
+	}
+	Ok(())
+}
+
+impl DisplayMode {
+	fn print_key(&self, k: &IVec) {
+		match *self {
+			DisplayMode::HexDump => {
+				hexdump::hexdump(k);
+			}
+			_ => {
+				println!("{}", try_string(k));
+			}
+		}
+	}
+
+	fn print_pair(&self, k: &IVec, v: &IVec) {
+		match *self {
+			DisplayMode::HexDump => {
+				hexdump::hexdump(k);
+				hexdump::hexdump(v);
+				println!();
+			}
+			DisplayMode::Mixed => {
+				println!("{}", try_string(k));
+				hexdump::hexdump(v);
+				println!();
+			}
+			DisplayMode::TryString => {
+				println!("{}\t{}", try_string(k), try_string(v));
+			}
+		}
+	}
+}