Remove old multirust & compat code

Author: dwijnand

Cargo.toml

@@ -1,31 +1,22 @@
 [package]
-
 name = "rustup"
 version = "1.17.0"
 edition = "2018"
 authors = [ "Diggory Blake <diggsey@googlemail.com>" ]
 description = "Manage multiple rust installations with ease"
-
-documentation = "http://rust-lang.github.io/rustup.rs/rustup/index.html"
+documentation = "https://rust-lang.github.io/rustup.rs/rustup/index.html"
 homepage = "https://github.com/rust-lang/rustup.rs"
 repository = "https://github.com/rust-lang/rustup.rs"
-
 readme = "README.md"
-
 keywords = ["rustup", "multirust", "install", "proxy"]
-
 license = "MIT OR Apache-2.0"
-
 build = "build.rs"
 
 [features]
-
 default = ["curl-backend", "reqwest-backend"]
-
 curl-backend = ["download/curl-backend"]
 reqwest-backend = ["download/reqwest-backend"]
 vendored-openssl = ['openssl/vendored']
-
 # Include in the default set to disable self-update and uninstall.
 no-self-update = []
 

src/cli/main.rs

@@ -29,7 +29,6 @@ mod setup_mode;
 mod term2;
 
 use crate::errors::*;
-use rustup::dist::dist::TargetTriple;
 use rustup::env_var::RUST_RECURSION_COUNT_MAX;
 use std::alloc::System;
 use std::env;
@@ -51,9 +50,6 @@ fn run_rustup() -> Result<()> {
     // bugs in rustup.
     do_recursion_guard()?;
 
-    // Do various hacks to clean up past messes
-    do_compatibility_hacks();
-
     // The name of arg0 determines how the program is going to behave
     let arg0 = env::args().next().map(PathBuf::from);
     let name = arg0
@@ -63,11 +59,7 @@ fn run_rustup() -> Result<()> {
 
     match name {
         Some("rustup") => rustup_mode::main(),
-        Some(n)
-            if n.starts_with("multirust-setup")
-                || n.starts_with("rustup-setup")
-                || n.starts_with("rustup-init") =>
-        {
+        Some(n) if n.starts_with("rustup-setup") || n.starts_with("rustup-init") => {
             // NB: The above check is only for the prefix of the file
             // name. Browsers rename duplicates to
             // e.g. rustup-setup(2), and this allows all variations
@@ -79,24 +71,6 @@ fn run_rustup() -> Result<()> {
             // rustup deletes its own exe
             self_update::complete_windows_uninstall()
         }
-        Some(n) if n.starts_with("multirust-") => {
-            // This is for compatibility with previous revisions of
-            // multirust-rs self-update, which expect multirust-rs to
-            // be available on the server, downloads it to
-            // ~/.multirust/tmp/multirust-$random, and execute it with
-            // `self install` as the arguments.  FIXME: Verify this
-            // works.
-            let opts = self_update::InstallOpts {
-                default_host_triple: TargetTriple::from_host_or_build().to_string(),
-                default_toolchain: "stable".to_string(),
-                no_modify_path: false,
-            };
-            if cfg!(windows) {
-                self_update::install(false, false, opts)
-            } else {
-                self_update::install(true, false, opts)
-            }
-        }
         Some(_) => proxy_mode::main(),
         None => {
             // Weird case. No arg0, or it's unparsable.
@@ -116,70 +90,3 @@ fn do_recursion_guard() -> Result<()> {
 
     Ok(())
 }
-
-fn do_compatibility_hacks() {
-    make_environment_compatible();
-    fix_windows_reg_key();
-    delete_multirust_bin();
-}
-
-// Convert any MULTIRUST_ env vars to RUSTUP_ and warn about them
-fn make_environment_compatible() {
-    let ref vars = ["HOME", "TOOLCHAIN", "DIST_ROOT", "UPDATE_ROOT", "GPG_KEY"];
-    for var in vars {
-        let ref mvar = format!("MULTIRUST_{}", var);
-        let ref rvar = format!("RUSTUP_{}", var);
-        let mval = env::var_os(mvar);
-        let rval = env::var_os(rvar);
-
-        match (mval, rval) {
-            (Some(mval), None) => {
-                env::set_var(rvar, mval);
-                warn!("environment variable {} is deprecated. Use {}.", mvar, rvar);
-            }
-            _ => (),
-        }
-    }
-}
-
-// #261 We previously incorrectly set HKCU/Environment/PATH to a
-// REG_SZ type, when it should be REG_EXPAND_SZ. Silently fix it.
-#[cfg(windows)]
-fn fix_windows_reg_key() {
-    use winreg::enums::{RegType, HKEY_CURRENT_USER, KEY_READ, KEY_WRITE};
-    use winreg::RegKey;
-
-    let root = RegKey::predef(HKEY_CURRENT_USER);
-    let env = root.open_subkey_with_flags("Environment", KEY_READ | KEY_WRITE);
-
-    let env = if let Ok(e) = env { e } else { return };
-
-    let path = env.get_raw_value("PATH");
-
-    let mut path = if let Ok(p) = path { p } else { return };
-
-    if path.vtype == RegType::REG_EXPAND_SZ {
-        return;
-    }
-
-    path.vtype = RegType::REG_EXPAND_SZ;
-
-    let _ = env.set_raw_value("PATH", &path);
-}
-
-#[cfg(not(windows))]
-fn fix_windows_reg_key() {}
-
-// rustup used to be called 'multirust'. This deletes the old bin.
-fn delete_multirust_bin() {
-    use rustup::utils::utils;
-    use std::env::consts::EXE_SUFFIX;
-    use std::fs;
-
-    if let Ok(home) = utils::cargo_home() {
-        let legacy_bin = home.join(format!("bin/multirust{}", EXE_SUFFIX));
-        if legacy_bin.exists() {
-            let _ = fs::remove_file(legacy_bin);
-        }
-    }
-}

src/cli/self_update.rs

@@ -262,14 +262,10 @@ pub fn install(no_prompt: bool, verbose: bool, mut opts: InstallOpts) -> Result<
     }
 
     let install_res: Result<()> = (|| {
-        cleanup_legacy()?;
         install_bins()?;
         if !opts.no_modify_path {
             do_add_to_path(&get_add_path_methods())?;
         }
-        // Create ~/.rustup and a compatibility ~/.multirust symlink.
-        // FIXME: Someday we can stop setting up the symlink, and when
-        // we do that we can stop creating ~/.rustup as well.
         utils::create_rustup_home()?;
         maybe_install_rust(&opts.default_toolchain, &opts.default_host_triple, verbose)?;
 
@@ -340,9 +336,6 @@ fn rustc_or_cargo_exists_in_path() -> Result<()> {
         !path
             .components()
             .any(|c| c == Component::Normal(".cargo".as_ref()))
-            && !path
-                .components()
-                .any(|c| c == Component::Normal(".multirust".as_ref()))
     }
 
     if let Some(paths) = env::var_os("PATH") {
@@ -381,62 +374,13 @@ fn check_existence_of_rustc_or_cargo_in_path(no_prompt: bool) -> Result<()> {
 }
 
 fn do_pre_install_sanity_checks() -> Result<()> {
-    let multirust_manifest_path = PathBuf::from("/usr/local/lib/rustlib/manifest-multirust");
     let rustc_manifest_path = PathBuf::from("/usr/local/lib/rustlib/manifest-rustc");
     let uninstaller_path = PathBuf::from("/usr/local/lib/rustlib/uninstall.sh");
-    let multirust_meta_path = utils::home_dir().map(|d| d.join(".multirust"));
-    let multirust_version_path = multirust_meta_path.as_ref().map(|p| p.join("version"));
     let rustup_sh_path = utils::home_dir().map(|d| d.join(".rustup"));
     let rustup_sh_version_path = rustup_sh_path.as_ref().map(|p| p.join("rustup-version"));
 
-    let multirust_exists = multirust_manifest_path.exists() && uninstaller_path.exists();
     let rustc_exists = rustc_manifest_path.exists() && uninstaller_path.exists();
     let rustup_sh_exists = rustup_sh_version_path.map(|p| p.exists()) == Some(true);
-    let old_multirust_meta_exists = if let Some(ref multirust_version_path) = multirust_version_path
-    {
-        multirust_version_path.exists() && {
-            let version = utils::read_file("old-multirust", multirust_version_path);
-            let version = version.unwrap_or(String::new());
-            let version = version.parse().unwrap_or(0);
-            let cutoff_version = 12; // First rustup version
-
-            version < cutoff_version
-        }
-    } else {
-        false
-    };
-
-    match (multirust_exists, old_multirust_meta_exists) {
-        (true, false) => {
-            warn!("it looks like you have an existing installation of multirust");
-            warn!("rustup cannot be installed alongside multirust");
-            warn!(
-                "run `{}` as root to uninstall multirust before installing rustup",
-                uninstaller_path.display()
-            );
-            return Err("cannot install while multirust is installed".into());
-        }
-        (false, true) => {
-            warn!("it looks like you have existing multirust metadata");
-            warn!("rustup cannot be installed alongside multirust");
-            warn!(
-                "delete `{}` before installing rustup",
-                multirust_meta_path.expect("").display()
-            );
-            return Err("cannot install while multirust is installed".into());
-        }
-        (true, true) => {
-            warn!("it looks like you have an existing installation of multirust");
-            warn!("rustup cannot be installed alongside multirust");
-            warn!(
-                "run `{}` as root and delete `{}` before installing rustup",
-                uninstaller_path.display(),
-                multirust_meta_path.expect("").display()
-            );
-            return Err("cannot install while multirust is installed".into());
-        }
-        (false, false) => (),
-    }
 
     if rustc_exists {
         warn!("it looks like you have an existing installation of Rust");
@@ -666,36 +610,6 @@ fn customize_install(mut opts: InstallOpts) -> Result<InstallOpts> {
     Ok(opts)
 }
 
-// Before rustup-rs installed bins to $CARGO_HOME/bin it installed
-// them to $RUSTUP_HOME/bin. If those bins continue to exist after
-// upgrade and are on the $PATH, it would cause major confusion. This
-// method silently deletes them.
-fn cleanup_legacy() -> Result<()> {
-    let legacy_bin_dir = legacy_multirust_home_dir()?.join("bin");
-
-    for tool in TOOLS.iter().cloned().chain(vec!["multirust", "rustup"]) {
-        let ref file = legacy_bin_dir.join(&format!("{}{}", tool, EXE_SUFFIX));
-        if file.exists() {
-            utils::remove_file("legacy-bin", file)?;
-        }
-    }
-
-    return Ok(());
-
-    #[cfg(unix)]
-    fn legacy_multirust_home_dir() -> Result<PathBuf> {
-        Ok(utils::legacy_multirust_home()?)
-    }
-
-    #[cfg(windows)]
-    fn legacy_multirust_home_dir() -> Result<PathBuf> {
-        use rustup::utils::raw::windows::{get_special_folder, FOLDERID_LocalAppData};
-
-        // FIXME: This looks bogus. Where is the .multirust dir?
-        Ok(get_special_folder(&FOLDERID_LocalAppData).unwrap_or(PathBuf::from(".")))
-    }
-}
-
 fn install_bins() -> Result<()> {
     let ref bin_path = utils::cargo_home()?.join("bin");
     let ref this_exe_path = utils::current_exe()?;
@@ -845,8 +759,6 @@ pub fn uninstall(no_prompt: bool) -> Result<()> {
 
     info!("removing rustup home");
 
-    utils::delete_legacy_multirust_symlink()?;
-
     // Delete RUSTUP_HOME
     let ref rustup_dir = utils::rustup_home()?;
     if rustup_dir.exists() {
@@ -1631,12 +1543,5 @@ pub fn cleanup_self_updater() -> Result<()> {
         utils::remove_file("setup", setup)?;
     }
 
-    // Transitional
-    let ref old_setup = cargo_home.join(&format!("bin/multirust-setup{}", EXE_SUFFIX));
-
-    if old_setup.exists() {
-        utils::remove_file("setup", old_setup)?;
-    }
-
     Ok(())
 }

src/config.rs

@@ -56,8 +56,6 @@ impl Cfg {
         utils::ensure_dir_exists("home", &rustup_dir, &|n| notify_handler(n.into()))?;
 
         let settings_file = SettingsFile::new(rustup_dir.join("settings.toml"));
-        // Convert from old settings format if necessary
-        settings_file.maybe_upgrade_from_legacy(&rustup_dir)?;
 
         let toolchains_dir = rustup_dir.join("toolchains");
         let update_hash_dir = rustup_dir.join("update-hashes");

src/settings.rs

@@ -5,7 +5,6 @@ use crate::utils::utils;
 use std::cell::RefCell;
 use std::collections::BTreeMap;
 use std::path::{Path, PathBuf};
-use std::str::FromStr;
 
 pub const SUPPORTED_METADATA_VERSIONS: [&'static str; 2] = ["2", "12"];
 pub const DEFAULT_METADATA_VERSION: &'static str = "12";
@@ -61,52 +60,6 @@ impl SettingsFile {
         self.write_settings()?;
         Ok(result)
     }
-    pub fn maybe_upgrade_from_legacy(&self, multirust_dir: &Path) -> Result<()> {
-        // Data locations
-        let legacy_version_file = multirust_dir.join("version");
-        if utils::is_file(&legacy_version_file) {
-            fn split_override<T: FromStr>(s: &str, separator: char) -> Option<(T, T)> {
-                s.find(separator).and_then(|index| {
-                    match (T::from_str(&s[..index]), T::from_str(&s[index + 1..])) {
-                        (Ok(l), Ok(r)) => Some((l, r)),
-                        _ => None,
-                    }
-                })
-            }
-
-            let override_db = multirust_dir.join("overrides");
-            let default_file = multirust_dir.join("default");
-            // Legacy upgrade
-            self.with_mut(|s| {
-                s.version = utils::read_file("version", &legacy_version_file)?
-                    .trim()
-                    .to_owned();
-
-                if utils::is_file(&default_file) {
-                    s.default_toolchain = Some(
-                        utils::read_file("default", &default_file)?
-                            .trim()
-                            .to_owned(),
-                    );
-                }
-                if utils::is_file(&override_db) {
-                    let overrides = utils::read_file("overrides", &override_db)?;
-                    for o in overrides.lines() {
-                        if let Some((k, v)) = split_override(o, ';') {
-                            s.overrides.insert(k, v);
-                        }
-                    }
-                }
-                Ok(())
-            })?;
-
-            // Failure to delete these is not a fatal error
-            let _ = utils::remove_file("version", &legacy_version_file);
-            let _ = utils::remove_file("default", &default_file);
-            let _ = utils::remove_file("overrides", &override_db);
-        }
-        Ok(())
-    }
 }
 
 #[derive(Clone, Debug, PartialEq)]