Fixup Mac curl $URL | sudo sh -s (#99)

* Fixup Mac curl sh

* We not longer require sudo for the script

Cargo.lock

@@ -492,6 +492,16 @@ dependencies = [
  "dirs-sys",
 ]
 
+[[package]]
+name = "dirs-next"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b98cf8ebf19c3d1b223e151f99a4f9f0690dca41414773390fc824184ac833e1"
+dependencies = [
+ "cfg-if",
+ "dirs-sys-next",
+]
+
 [[package]]
 name = "dirs-sys"
 version = "0.3.7"
@@ -503,6 +513,17 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "dirs-sys-next"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ebda144c4fe02d1f7ea1a7d9641b6fc6b580adcfa024ae48797ecdeb6825b4d"
+dependencies = [
+ "libc",
+ "redox_users",
+ "winapi",
+]
+
 [[package]]
 name = "dyn-clone"
 version = "1.0.9"
@@ -805,6 +826,7 @@ dependencies = [
  "sxd-xpath",
  "tar",
  "target-lexicon",
+ "term",
  "thiserror",
  "tokio",
  "tokio-util",
@@ -1595,6 +1617,12 @@ dependencies = [
  "base64",
 ]
 
+[[package]]
+name = "rustversion"
+version = "1.0.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97477e48b4cf8603ad5f7aaf897467cf42ab4218a38ef76fb14c2d6773a6d6a8"
+
 [[package]]
 name = "ryu"
 version = "1.0.11"
@@ -1859,6 +1887,17 @@ version = "0.12.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9410d0f6853b1d94f0e519fb95df60f29d2c1eff2d921ffdf01a4c8a3b54f12d"
 
+[[package]]
+name = "term"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c59df8ac95d96ff9bede18eb7300b0fda5e5d8d90960e76f8e14ae765eedbf1f"
+dependencies = [
+ "dirs-next",
+ "rustversion",
+ "winapi",
+]
+
 [[package]]
 name = "termcolor"
 version = "1.1.3"

Cargo.toml

@@ -57,6 +57,7 @@ typetag = "0.2.3"
 dyn-clone = "1.0.9"
 rand = "0.8.5"
 semver = { version = "1.0.14", features = ["serde"] }
+term = "0.7.0"
 
 [dev-dependencies]
 eyre = "0.6.8"

README.md

@@ -7,7 +7,7 @@ Harmonic is an opinionated, experimental Nix installer.
 > Try it on a machine/VM you don't care about!
 >
 > ```bash
-> curl -L https://install.determinate.systems/nix | sudo sh -s -- install
+> curl -L https://install.determinate.systems/nix | sh -s -- install
 > ```
 
 ## Status

nix-install.sh

@@ -93,6 +93,11 @@ main() {
         exit 1
     fi
 
+    local maybe_sudo=""
+    if [ "$EUID" -ne 0 ] && command -v sudo > /dev/null; then
+        maybe_sudo="sudo"
+    fi
+
     if [ "$need_tty" = "yes" ] && [ ! -t 0 ]; then
         # The installer is going to want to ask for confirmation by
         # reading stdin.  This script was piped into `sh` though and
@@ -102,9 +107,9 @@ main() {
             err "Unable to run interactively. Run with -y to accept defaults, --help for additional options"
         fi
 
-        ignore "$_file" "$@" < /dev/tty
+        ignore "$maybe_sudo" "$_file" "$@" < /dev/tty
     else
-        ignore "$_file" "$@"
+        ignore "$maybe_sudo" "$_file" "$@"
     fi
 
     local _retval=$?

src/cli/interaction.rs

@@ -1,11 +1,18 @@
+use std::io::{stdin, stdout, BufRead, Write};
+
 use crossterm::event::{EventStream, KeyCode};
 use eyre::{eyre, WrapErr};
 use futures::{FutureExt, StreamExt};
 use owo_colors::OwoColorize;
-use tokio::io::AsyncWriteExt;
 
-pub(crate) async fn confirm(question: impl AsRef<str>) -> eyre::Result<bool> {
-    let mut stdout = tokio::io::stdout();
+// Do not try to get clever!
+//
+// Mac is extremely janky if you `curl $URL | sudo sh` and the TTY may not be set up right.
+// The below method was adopted from Rustup at https://github.com/rust-lang/rustup/blob/3331f34c01474bf216c99a1b1706725708833de1/src/cli/term2.rs#L37
+pub(crate) async fn confirm(question: impl AsRef<str>, default: bool) -> eyre::Result<bool> {
+    let stdout = stdout();
+    let mut term =
+        term::terminfo::TerminfoTerminal::new(stdout).ok_or(eyre!("Couldn't get terminal"))?;
     let with_confirm = format!(
         "\
         {question}\n\
@@ -18,42 +25,31 @@ pub(crate) async fn confirm(question: impl AsRef<str>) -> eyre::Result<bool> {
         yes = "y".green(),
     );
 
-    stdout.write_all(with_confirm.as_bytes()).await?;
-    stdout.flush().await?;
+    term.write_all(with_confirm.as_bytes())?;
+    term.flush()?;
 
-    // crossterm::terminal::enable_raw_mode()?;
-    let mut reader = EventStream::new();
+    let input = read_line()?;
 
-    let retval = loop {
-        let event = reader.next().fuse().await;
-        match event {
-            Some(Ok(event)) => {
-                if let crossterm::event::Event::Key(key) = event {
-                    match key.code {
-                        KeyCode::Char('y') | KeyCode::Char('Y') => {
-                            stdout
-                                .write_all("Confirmed!\n".green().to_string().as_bytes())
-                                .await?;
-                            stdout.flush().await?;
-                            break Ok(true);
-                        },
-                        KeyCode::Char('N') | KeyCode::Char('n') => {
-                            stdout
-                                .write_all("Cancelled!\n".red().to_string().as_bytes())
-                                .await?;
-                            stdout.flush().await?;
-                            break Ok(false);
-                        },
-                        KeyCode::Enter | _ => continue,
-                    }
-                }
-            },
-            Some(Err(err)) => break Err(err).wrap_err("Getting response"),
-            None => break Err(eyre!("Bailed, no confirmation event")),
-        }
+    let r = match &*input.to_lowercase() {
+        "y" | "yes" => true,
+        "n" | "no" => false,
+        "" => default,
+        _ => false,
     };
-    // crossterm::terminal::disable_raw_mode()?;
-    retval
+
+    Ok(r)
+}
+
+pub(crate) fn read_line() -> eyre::Result<String> {
+    let stdin = stdin();
+    let stdin = stdin.lock();
+    let mut lines = stdin.lines();
+    let lines = lines.next().transpose()?;
+    match lines {
+        None => Err(eyre!("no lines found from stdin")),
+        Some(v) => Ok(v),
+    }
+    .context("unable to read from stdin for confirmation")
 }
 
 pub(crate) async fn clean_exit_with_message(message: impl AsRef<str>) -> ! {

src/cli/subcommand/install.rs

@@ -111,6 +111,7 @@ impl CommandExecute for Install {
                 install_plan
                     .describe_install(explain)
                     .map_err(|e| eyre!(e))?,
+                true,
             )
             .await?
             {
@@ -128,6 +129,7 @@ impl CommandExecute for Install {
                     install_plan
                         .describe_uninstall(explain)
                         .map_err(|e| eyre!(e))?,
+                    true,
                 )
                 .await?
                 {

src/cli/subcommand/uninstall.rs

@@ -53,8 +53,11 @@ impl CommandExecute for Uninstall {
         let mut plan: InstallPlan = serde_json::from_str(&install_receipt_string)?;
 
         if !no_confirm {
-            if !interaction::confirm(plan.describe_uninstall(explain).map_err(|e| eyre!(e))?)
-                .await?
+            if !interaction::confirm(
+                plan.describe_uninstall(explain).map_err(|e| eyre!(e))?,
+                true,
+            )
+            .await?
             {
                 interaction::clean_exit_with_message("Okay, didn't do anything! Bye!").await;
             }