Had previously installed rust using : curl -sSf https://static.rust-lang.org/rustup.sh | sh as described in https://www.rust-lang.org/en-US/downloads.html However, I had version 1.12.1 Running ./mach bootstrap "Looks like you have MacPorts installed. We will install all required packages via MacPorts. Your version of Mercurial (3.9) is sufficiently modern. Your version of Python (2.7.12) is new enough. Will try to install Rust. Downloading rustup-init... Ok Running rustup-init... warning: it looks like you have an existing installation of Rust warning: rustup cannot be installed alongside Rust. Please uninstall first warning: run `/usr/local/lib/rustlib/uninstall.sh` as root to uninstall Rust error: cannot install while Rust is installed Error running mach: ['bootstrap'] The error occurred in code that was called by the mach command. This is either a bug in the called code itself or in the way that mach is calling it. You should consider filing a bug for this issue." So I ran /usr/local/lib/rustlib/uninstall.sh as root as written. ./mach bootstrap then gave: "Looks like you have MacPorts installed. We will install all required packages via MacPorts. Executing as root: sudo /opt/local/bin/port select --set python python27 Selecting 'python27' for 'python' succeeded. 'python27' is now active. Your version of Mercurial (3.9) is sufficiently modern. Your version of Python (2.7.12) is new enough. Could not find a Rust compiler." So you have to re-run manually curl -sSf https://static.rust-lang.org/rustup.sh after that.

I'm confused. After you ran `/usr/local/lib/rustlib/uninstall.sh`, `mach boostrap` printed "Could not find a Rust compiler," and stopped without downloading and running the installer for you? I don't see how that's possible. Note that the bootstrap installer puts rust in $HOME/.cargo/bin so you need to add that to your path. Now that bug 1319860 has landed we should print a message about that.

(In reply to Ralph Giles (:rillian) needinfo me from comment #1) > I'm confused. After you ran `/usr/local/lib/rustlib/uninstall.sh`, `mach > boostrap` printed "Could not find a Rust compiler," and stopped without > downloading and running the installer for you? I don't see how that's > possible. yes exactly... Maybe it's because I'm running mac port, and it doesn't provide a version greater than 1.11 and it looks like if mac port is in used there's no fallback to get a different version of rust. > > Note that the bootstrap installer puts rust in $HOME/.cargo/bin so you need > to add that to your path. Now that bug 1319860 has landed we should print a > message about that. I had to manually install rust again as described in the first message.

> error: cannot install while Rust is installed I installed macports, and I can reproduce this part if I have an rust 1.13 in /usr/local/bin and 1.11 in /opt/local/bin. However, I can't reproduce the last part. After I run the uninstall script for the /usr/local version, bootstrap installs successfully in ~/.cargo/bin and subsequent invocations either repeat the install (if ~/.cargo/bin/rustc isn't found in the PATH) or say it's ok (if it is). I can clean up the messages in this case a bit though.

Comment on attachment 8815124 [details] Bug 1320596 - mozboot: Handle old rustc but not rustup. https://reviewboard.mozilla.org/r/96118/#review96264

Pushed by gszorc@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/02c6731cc824 mozboot: Handle old rustc but not rustup. r=gps