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204 lines
7.0 KiB
204 lines
7.0 KiB
use super::command::Command; |
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use super::install::Install; |
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use crate::fs; |
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use crate::installed_versions; |
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use crate::outln; |
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use crate::symlink_path::DefaultMultishellPathExt; |
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use crate::system_version; |
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use crate::user_version::UserVersion; |
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use crate::version::Version; |
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use crate::{config::FnmConfig, user_version_reader::UserVersionReader}; |
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use colored::Colorize; |
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use snafu::{ensure, OptionExt, ResultExt, Snafu}; |
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use structopt::StructOpt; |
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|
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#[derive(StructOpt, Debug)] |
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pub struct Use { |
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version: Option<UserVersionReader>, |
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/// Install the version if it isn't installed yet |
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#[structopt(long)] |
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install_if_missing: bool, |
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} |
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impl Command for Use { |
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type Error = Error; |
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fn apply(self, config: &FnmConfig) -> Result<(), Self::Error> { |
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let multishell_path = config |
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.multishell_path_or_default() |
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.context(FnmEnvWasNotSourced)?; |
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warn_if_multishell_path_not_in_path_env_var(&multishell_path, config); |
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|
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let all_versions = |
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installed_versions::list(config.installations_dir()).context(VersionListingError)?; |
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let requested_version = self |
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.version |
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.unwrap_or_else(|| { |
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let current_dir = std::env::current_dir().unwrap(); |
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UserVersionReader::Path(current_dir) |
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}) |
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.into_user_version() |
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.context(CantInferVersion)?; |
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let version_path = if let UserVersion::Full(Version::Bypassed) = requested_version { |
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outln!( |
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config, |
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Info, |
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"Bypassing fnm: using {} node", |
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system_version::display_name().cyan() |
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); |
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system_version::path() |
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} else if let Some(alias_name) = requested_version.alias_name() { |
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let alias_path = config.aliases_dir().join(&alias_name); |
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let system_path = system_version::path(); |
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if matches!(fs::shallow_read_symlink(&alias_path), Ok(shallow_path) if shallow_path == system_path) |
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{ |
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outln!( |
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config, |
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Info, |
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"Bypassing fnm: using {} node", |
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system_version::display_name().cyan() |
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); |
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system_path |
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} else if alias_path.exists() { |
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outln!(config, Info, "Using Node for alias {}", alias_name.cyan()); |
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alias_path |
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} else { |
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install_new_version(requested_version, config, self.install_if_missing)?; |
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return Ok(()); |
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} |
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} else { |
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let current_version = requested_version.to_version(&all_versions, config); |
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if let Some(version) = current_version { |
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outln!(config, Info, "Using Node {}", version.to_string().cyan()); |
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config |
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.installations_dir() |
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.join(version.to_string()) |
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.join("installation") |
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} else { |
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install_new_version(requested_version, config, self.install_if_missing)?; |
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return Ok(()); |
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} |
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}; |
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replace_symlink(&version_path, &multishell_path).context(SymlinkingCreationIssue)?; |
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Ok(()) |
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} |
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} |
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fn install_new_version( |
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requested_version: UserVersion, |
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config: &FnmConfig, |
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install_if_missing: bool, |
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) -> Result<(), Error> { |
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ensure!( |
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install_if_missing || should_install_interactively(&requested_version), |
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CantFindVersion { |
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version: requested_version |
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} |
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); |
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Install { |
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version: Some(requested_version.clone()), |
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..Install::default() |
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} |
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.apply(config) |
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.context(InstallError)?; |
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Use { |
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version: Some(UserVersionReader::Direct(requested_version)), |
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install_if_missing: true, |
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} |
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.apply(config)?; |
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Ok(()) |
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} |
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/// Tries to delete `from`, and then tries to symlink `from` to `to` anyway. |
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/// If the symlinking fails, it will return the errors in the following order: |
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/// * The deletion error (if exists) |
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/// * The creation error |
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/// |
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/// This way, we can create a symlink if it is missing. |
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fn replace_symlink(from: &std::path::Path, to: &std::path::Path) -> std::io::Result<()> { |
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let symlink_deletion_result = fs::remove_symlink_dir(&to); |
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match fs::symlink_dir(&from, &to) { |
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ok @ Ok(_) => ok, |
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err @ Err(_) => symlink_deletion_result.and(err), |
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} |
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} |
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fn should_install_interactively(requested_version: &UserVersion) -> bool { |
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use std::io::Write; |
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if !(atty::is(atty::Stream::Stdout) && atty::is(atty::Stream::Stdin)) { |
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return false; |
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} |
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let error_message = format!( |
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"Can't find an installed Node version matching {}.", |
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requested_version.to_string().italic() |
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); |
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eprintln!("{}", error_message.red()); |
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let do_you_want = format!("Do you want to install it? {} [y/n]:", "answer".bold()); |
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eprint!("{} ", do_you_want.yellow()); |
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std::io::stdout().flush().unwrap(); |
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let mut s = String::new(); |
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std::io::stdin() |
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.read_line(&mut s) |
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.expect("Can't read user input"); |
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s.trim().to_lowercase() == "y" |
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} |
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fn warn_if_multishell_path_not_in_path_env_var( |
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multishell_path: &std::path::Path, |
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config: &FnmConfig, |
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) { |
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let bin_path = if cfg!(unix) { |
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multishell_path.join("bin") |
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} else { |
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multishell_path.to_path_buf() |
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}; |
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for path in std::env::split_paths(&std::env::var("PATH").unwrap_or_default()) { |
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if bin_path == path { |
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return; |
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} |
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} |
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outln!( |
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config, Error, |
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"{} {}\n{}\n{}", |
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"warning:".yellow().bold(), |
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"The current Node.js path is not on your PATH environment variable.".yellow(), |
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"You should setup your shell profile to evaluate `fnm env`, see https://github.com/Schniz/fnm#shell-setup on how to do this".yellow(), |
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"Check out our documentation for more information: https://fnm.vercel.app".yellow() |
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); |
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} |
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#[derive(Debug, Snafu)] |
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pub enum Error { |
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#[snafu(display("Can't create the symlink: {}", source))] |
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SymlinkingCreationIssue { source: std::io::Error }, |
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#[snafu(display("Can't read the symlink: {}", source))] |
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SymlinkReadFailed { source: std::io::Error }, |
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#[snafu(display("{}", source))] |
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InstallError { source: <Install as Command>::Error }, |
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#[snafu(display("Can't get locally installed versions: {}", source))] |
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VersionListingError { source: installed_versions::Error }, |
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#[snafu(display("Requested version {} is not currently installed", version))] |
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CantFindVersion { version: UserVersion }, |
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#[snafu(display( |
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"Can't find version in dotfiles. Please provide a version manually to the command." |
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))] |
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CantInferVersion, |
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#[snafu(display( |
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"{}\n{}\n{}", |
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"We can't find the necessary environment variables to replace the Node version.", |
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"You should setup your shell profile to evaluate `fnm env`, see https://github.com/Schniz/fnm#shell-setup on how to do this", |
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"Check out our documentation for more information: https://fnm.vercel.app" |
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))] |
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FnmEnvWasNotSourced { source: Box<dyn std::error::Error> }, |
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}
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