Prompt in a loop

5 files changed, 266 insertions, 8 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 69c74b8..5c31bd8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3,6 +3,15 @@
 version = 3
 
 [[package]]
+name = "aho-corasick"
+version = "0.7.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc936419f96fa211c1b9166887b38e5e40b19958e5b895be7c1f93adec7071ac"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
 name = "assert_cmd"
 version = "2.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -17,6 +26,18 @@ dependencies = [
 ]
 
 [[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
 name = "bstr"
 version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -29,6 +50,18 @@ dependencies = [
 ]
 
 [[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "comma"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "55b672471b4e9f9e95499ea597ff64941a309b2cdbffcc46f2cc5e2d971fd335"
+
+[[package]]
 name = "difflib"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -47,6 +80,24 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7fcaabb2fef8c910e7f4c7ce9f67a1283a1715879a7c230ca9d6d1ae31f16d91"
 
 [[package]]
+name = "fastrand"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e51093e27b0797c359783294ca4f0a911c270184cb10f85783b118614a1501be"
+dependencies = [
+ "instant",
+]
+
+[[package]]
+name = "instant"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a5bbe824c507c5da5956355e86a746d82e0e1464f65d862cc5e71da70e94b2c"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
 name = "itertools"
 version = "0.10.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -68,12 +119,41 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
 
 [[package]]
+name = "memoffset"
+version = "0.6.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5aa361d4faea93603064a027415f07bd8e1d5c88c9fbf68bf56a285428fd79ce"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "nix"
+version = "0.25.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f346ff70e7dbfd675fe90590b92d59ef2de15a8779ae305ebcbfd3f0caf59be4"
+dependencies = [
+ "autocfg",
+ "bitflags",
+ "cfg-if",
+ "libc",
+ "memoffset",
+ "pin-utils",
+]
+
+[[package]]
 name = "once_cell"
 version = "1.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b7e5500299e16ebb147ae15a00a942af264cf3688f47923b8fc2cd5858f23ad3"
 
 [[package]]
+name = "pin-utils"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
+
+[[package]]
 name = "predicates"
 version = "2.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -101,12 +181,78 @@ dependencies = [
 ]
 
 [[package]]
+name = "proc-macro2"
+version = "1.0.51"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d727cae5b39d21da60fa540906919ad737832fe0b1c165da3a34d6548c849d6"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8856d8364d252a14d474036ea1358d63c9e6965c8e5c1885c18f73d70bff9c7b"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "redox_syscall"
+version = "0.2.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
+name = "regex"
+version = "1.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "48aaa5748ba571fb95cd2c85c09f629215d3a6ece942baa100950af03a34f733"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+]
+
+[[package]]
 name = "regex-automata"
 version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6c230d73fb8d8c1b9c0b3135c5142a8acee3a0558fb8db5cf1cb65f8d7862132"
 
 [[package]]
+name = "regex-syntax"
+version = "0.6.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "456c603be3e8d448b072f410900c09faf164fbce2d480456f50eea6e25f9c848"
+
+[[package]]
+name = "remove_dir_all"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3acd125665422973a33ac9d3dd2df85edad0f4ae9b00dafb1a05e43a9f5ef8e7"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "rexpect"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "01ff60778f96fb5a48adbe421d21bf6578ed58c0872d712e7e08593c195adff8"
+dependencies = [
+ "comma",
+ "nix",
+ "regex",
+ "tempfile",
+ "thiserror",
+]
+
+[[package]]
 name = "serde"
 version = "1.0.152"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -117,6 +263,32 @@ name = "shackle"
 version = "0.1.0"
 dependencies = [
  "assert_cmd",
+ "rexpect",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.107"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1f4064b5b16e03ae50984a5a8ed5d4f8803e6bc1fd170a3cda91a1be4b18e3f5"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "tempfile"
+version = "3.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5cdb1ef4eaeeaddc8fbd371e5017057064af0911902ef36b39801f67cc6d79e4"
+dependencies = [
+ "cfg-if",
+ "fastrand",
+ "libc",
+ "redox_syscall",
+ "remove_dir_all",
+ "winapi",
 ]
 
 [[package]]
@@ -126,6 +298,32 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "95059e91184749cb66be6dc994f67f182b6d897cb3df74a5bf66b5e709295fd8"
 
 [[package]]
+name = "thiserror"
+version = "1.0.38"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a9cd18aa97d5c45c6603caea1da6628790b37f7a34b6ca89522331c5180fed0"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.38"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fb327af4685e4d03fa8cbcf1716380da910eeb2bb8be417e7f9fd3fb164f36f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "84a22b9f218b40614adcb3f4ff08b703773ad44fa9423e4e0d346d5db86e4ebc"
+
+[[package]]
 name = "wait-timeout"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -133,3 +331,25 @@ checksum = "9f200f5b12eb75f8c1ed65abd4b2db8a6e1b138a20de009dacee265a2498f3f6"
 dependencies = [
  "libc",
 ]
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
diff --git a/Cargo.toml b/Cargo.toml
index 36babb3..72f75f4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,6 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+rexpect = "0.5.0"
 
 [dev-dependencies]
 assert_cmd = "2.0.8"
diff --git a/readme.org b/readme.org
index a06c97f..3d87e5c 100644
--- a/readme.org
+++ b/readme.org
@@ -13,12 +13,13 @@ Pijul.
 
 * Roadmap
 
+- [X] interactive command prompt
+- [ ] exit command
 - [ ] git fetch and git push
-- [ ] interactive command prompt
 - [ ] git init of both private and shared repos
 - [ ] help command
-- [ ] history (only within same session)
 - [ ] listing of repos
+- [ ] history (only within same session)
 - [ ] set repo descriptions
 - [ ] set the main branch of a repo
 - [ ] move a repo to a different group
diff --git a/src/main.rs b/src/main.rs
index b40b9ca..f5f96b4 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,21 @@
-fn main() {
-    print!(">");
+use std::error::Error;
+use std::{io, io::Write};
+
+fn prompt() -> Result<(), Box<dyn Error>> {
+    print!("> ");
+    io::stdout().flush()?;
+    Ok(())
+}
+
+fn read_stdin() -> Result<String, Box<dyn Error>> {
+    let mut buffer = String::new();
+    io::stdin().read_line(&mut buffer)?;
+    Ok(buffer)
+}
+
+fn main() -> Result<(), Box<dyn Error>> {
+    loop {
+        prompt()?;
+        let _user_input = read_stdin()?;
+    }
 }
diff --git a/tests/cli.rs b/tests/cli.rs
index 18d815e..a4d368f 100644
--- a/tests/cli.rs
+++ b/tests/cli.rs
@@ -1,7 +1,25 @@
-use assert_cmd::Command;
+use assert_cmd::cargo::cargo_bin;
+use rexpect::{session::PtySession, spawn};
+use std::error::Error;
+
+fn spawn_interactive_process() -> Result<PtySession, Box<dyn Error>> {
+    let path = cargo_bin(env!("CARGO_PKG_NAME"));
+    let process = spawn(&path.display().to_string(), Some(3000))?;
+    Ok(process)
+}
+
+#[test]
+fn shows_a_prompt() -> Result<(), Box<dyn Error>> {
+    let mut p = spawn_interactive_process()?;
+    p.exp_string("> ")?;
+    Ok(())
+}
 
 #[test]
-fn shows_a_prompt() {
-    let mut cmd = Command::cargo_bin("shackle").unwrap();
-    cmd.assert().success().stdout(">");
+fn does_nothing_after_receiving_whitespace_input() -> Result<(), Box<dyn Error>> {
+    let mut p = spawn_interactive_process()?;
+    p.exp_string("> ")?;
+    p.send_line("")?;
+    p.exp_string("> ")?;
+    Ok(())
 }