Revert "Use registry from config, instead of cli argument"

This reverts commit 46c12e5.

Author: Joshua Nelson

src/bin/cratesfyi.rs

@@ -258,6 +258,10 @@ enum BuildSubcommand {
         #[structopt(name = "CRATE_VERSION")]
         crate_version: Option<String>,
 
+        /// Url for registry different from cratesio
+        #[structopt(name = "CRATE_REGISTRY")]
+        crate_registry: Option<String>,
+
         /// Build a crate at a specific path
         #[structopt(
             short = "l",
@@ -304,6 +308,7 @@ impl BuildSubcommand {
             Self::Crate {
                 crate_name,
                 crate_version,
+                crate_registry,
                 local,
             } => {
                 let mut builder = rustwide_builder()?;
@@ -313,13 +318,12 @@ impl BuildSubcommand {
                         .build_local_package(&path)
                         .context("Building documentation failed")?;
                 } else {
-                    let registry_url = ctx.config()?.registry_url.clone();
                     builder
                         .build_package(
                             &crate_name.ok_or_else(|| err_msg("must specify name if not local"))?,
                             &crate_version
                                 .ok_or_else(|| err_msg("must specify version if not local"))?,
-                            registry_url
+                            crate_registry
                                 .as_ref()
                                 .map(|s| PackageKind::Registry(s.as_str()))
                                 .unwrap_or(PackageKind::CratesIo),