Initial implementation for new wasmer config

lib/cli/src/cli.rs

@@ -126,6 +126,7 @@ enum WasmerCLIOptions {
 
     /// Get various configuration information needed
     /// to compile programs which use Wasmer
+    #[clap(subcommand)]
     Config(Config),
 
     /// Update wasmer to the latest version

lib/cli/src/commands/config.rs

@@ -3,38 +3,52 @@ use anyhow::{Context, Result};
 use clap::Parser;
 use std::env;
 use std::path::PathBuf;
+use wasmer_registry::PartialWapmConfig;
 
 #[derive(Debug, Parser)]
-/// The options for the `wasmer config` subcommand
-pub struct Config {
-    /// Print the installation prefix.
-    #[clap(long, conflicts_with = "pkg-config")]
-    prefix: bool,
+/// The options for the `wasmer config` subcommand: `wasmer config get prefix`
+pub enum Config {
+    /// Get a value from the current wasmer config
+    #[clap(subcommand)]
+    Get(RetrievableConfigField),
+    /// Set a value in the current wasmer config
+    #[clap(subcommand)]
+    Set(StorableConfigField),
+}
 
-    /// Directory containing Wasmer executables.
-    #[clap(long, conflicts_with = "pkg-config")]
-    bindir: bool,
+/// Value that can be queried from the wasmer config
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, clap::Subcommand)]
+pub enum RetrievableConfigField {
+    /// `prefix`
+    Prefix,
+    /// `bin-dir`
+    Bindir,
+    /// `includedir`
+    Includedir,
+    /// `libdir`
+    Libdir,
+    /// `libs`
+    Libs,
+    /// `cflags`
+    Cflags,
+    /// `pkg-config`
+    PkgConfig,
+}
 
-    /// Directory containing Wasmer headers.
-    #[clap(long, conflicts_with = "pkg-config")]
-    includedir: bool,
+/// Setting that can be stored in the wasmer config
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, clap::Subcommand)]
+pub enum StorableConfigField {
+    /// `registry.url`
+    #[clap(name = "registry.url")]
+    RegistryUrl(SetRegistryUrl),
+}
 
-    /// Directory containing Wasmer libraries.
-    #[clap(long, conflicts_with = "pkg-config")]
-    libdir: bool,
-
-    /// Libraries needed to link against Wasmer components.
-    #[clap(long, conflicts_with = "pkg-config")]
-    libs: bool,
-
-    /// C compiler flags for files that include Wasmer headers.
-    #[clap(long, conflicts_with = "pkg-config")]
-    cflags: bool,
-
-    /// It outputs the necessary details for compiling
-    /// and linking a program to Wasmer, using the `pkg-config` format.
-    #[clap(long)]
-    pkg_config: bool,
+/// Set a new registry URL
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Parser)]
+pub struct SetRegistryUrl {
+    /// Url of the registry
+    #[clap(name = "URL")]
+    pub url: String,
 }
 
 impl Config {
@@ -44,6 +58,8 @@ impl Config {
             .context("failed to retrieve the wasmer config".to_string())
     }
     fn inner_execute(&self) -> Result<()> {
+        use self::Config::{Get, Set};
+
         let key = "WASMER_DIR";
         let wasmer_dir = env::var(key)
             .or_else(|e| {
@@ -65,37 +81,55 @@ impl Config {
         let cflags = format!("-I{}", includedir);
         let libs = format!("-L{} -lwasmer", libdir);
 
-        if self.pkg_config {
-            println!("prefix={}", prefixdir);
-            println!("exec_prefix={}", bindir);
-            println!("includedir={}", includedir);
-            println!("libdir={}", libdir);
-            println!();
-            println!("Name: wasmer");
-            println!("Description: The Wasmer library for running WebAssembly");
-            println!("Version: {}", VERSION);
-            println!("Cflags: {}", cflags);
-            println!("Libs: {}", libs);
-            return Ok(());
-        }
-
-        if self.prefix {
-            println!("{}", prefixdir);
-        }
-        if self.bindir {
-            println!("{}", bindir);
-        }
-        if self.includedir {
-            println!("{}", includedir);
-        }
-        if self.libdir {
-            println!("{}", libdir);
-        }
-        if self.libs {
-            println!("{}", libs);
-        }
-        if self.cflags {
-            println!("{}", cflags);
+        match self {
+            Get(g) => match g {
+                RetrievableConfigField::PkgConfig => {
+                    println!("prefix={}", prefixdir);
+                    println!("exec_prefix={}", bindir);
+                    println!("includedir={}", includedir);
+                    println!("libdir={}", libdir);
+                    println!();
+                    println!("Name: wasmer");
+                    println!("Description: The Wasmer library for running WebAssembly");
+                    println!("Version: {}", VERSION);
+                    println!("Cflags: {}", cflags);
+                    println!("Libs: {}", libs);
+                }
+                RetrievableConfigField::Prefix => {
+                    println!("{}", prefixdir);
+                }
+                RetrievableConfigField::Bindir => {
+                    println!("{}", bindir);
+                }
+                RetrievableConfigField::Includedir => {
+                    println!("{}", includedir);
+                }
+                RetrievableConfigField::Libdir => {
+                    println!("{}", libdir);
+                }
+                RetrievableConfigField::Libs => {
+                    println!("{}", libs);
+                }
+                RetrievableConfigField::Cflags => {
+                    println!("{}", cflags);
+                }
+            },
+            Set(s) => match s {
+                StorableConfigField::RegistryUrl(s) => {
+                    let config_file = PartialWapmConfig::get_file_location()
+                        .map_err(|e| anyhow::anyhow!("could not find config file {e}"))?;
+                    let mut config = PartialWapmConfig::from_file()
+                        .map_err(|e| anyhow::anyhow!("could not find config file {e}"))?;
+                    config.registry.set_current_registry(&s.url);
+                    config
+                        .save(config_file)
+                        .with_context(|| anyhow::anyhow!("could not save config file"))?;
+                    println!(
+                        "set current registry to {}",
+                        config.registry.get_current_registry()
+                    );
+                }
+            },
         }
         Ok(())
     }