Run conda env update -p and -n according to config

src/steps/generic.rs

@@ -1,6 +1,7 @@
 #![allow(unused_imports)]
 
 use std::ffi::OsStr;
+use std::iter::once;
 use std::path::PathBuf;
 use std::process::Command;
 use std::{env, path::Path};
@@ -517,12 +518,33 @@ pub fn run_conda_update(ctx: &ExecutionContext) -> Result<()> {
 
     print_separator("Conda");
 
-    let mut command = ctx.run_type().execute(conda);
-    command.args(["update", "--all", "-n", "base"]);
-    if ctx.config().yes(Step::Conda) {
-        command.arg("--yes");
+    // Update named environments, starting with the always-present "base"
+    let base_env_name = "base".to_string();
+    let addl_env_names = ctx.config().conda_env_names().into_iter().flatten();
+    let env_names = once(&base_env_name).chain(addl_env_names);
+
+    for env_name in env_names {
+        let mut command = ctx.run_type().execute(&conda);
+        command.args(["update", "--all", "-n", env_name]);
+        if ctx.config().yes(Step::Conda) {
+            command.arg("--yes");
+        }
+        command.status_checked()?;
     }
-    command.status_checked()
+
+    // Update any environments given by path
+    if let Some(env_paths) = ctx.config().conda_env_paths() {
+        for env_path in env_paths.iter() {
+            let mut command = ctx.run_type().execute(&conda);
+            command.args(["update", "--all", "-p", env_path]);
+            if ctx.config().yes(Step::Conda) {
+                command.arg("--yes");
+            }
+            command.status_checked()?;
+        }
+    }
+
+    Ok(())
 }
 
 pub fn run_pixi_update(ctx: &ExecutionContext) -> Result<()> {