feat(pkg_mgr): add uninstall command and improve install

Implement `mling uninstall` to remove installed packages by name or
name@version, with shell completion support. Rework install to build
release binaries, copy them plus completion scripts to a per-version
directory under the user data dir.

1 files changed, 38 insertions, 0 deletions

diff --git a/mingling_cli/src/pkg_mgr.rs b/mingling_cli/src/pkg_mgr.rs
index b77c3b3..7aea59d 100644
--- a/mingling_cli/src/pkg_mgr.rs
+++ b/mingling_cli/src/pkg_mgr.rs
@@ -1,2 +1,40 @@
 pub mod cmd_install;
+pub mod cmd_uninstall;
 
+use std::path::PathBuf;
+
+use mingling::{
+    Program,
+    macros::{buffer, pack_err, program_setup, r_println, renderer},
+};
+
+use crate::ThisProgram;
+
+pack_err!(ErrorRootPackageNotFound);
+pack_err!(ErrorNoDataDirectory);
+
+/// The `.mingling` packages directory under the user's data directory.
+#[derive(Debug, Default, Clone)]
+pub struct ResPackagesDir {
+    pub path: PathBuf,
+}
+
+#[program_setup]
+pub fn package_manager_setup(program: &mut Program<ThisProgram>) {
+    let path = dirs::data_dir()
+        .map(|data_dir| data_dir.join(".mingling"))
+        .unwrap_or_default();
+    program.with_resource(ResPackagesDir { path });
+}
+
+#[renderer(buffer)]
+pub fn render_error_root_package_not_found(_: ErrorRootPackageNotFound) {
+    r_println!("error: failed to determine the root package");
+    r_println!("");
+    r_println!("Run `mling install` / `mling uninstall` inside a Cargo workspace");
+}
+
+#[renderer(buffer)]
+pub fn render_error_no_data_directory(_: ErrorNoDataDirectory) {
+    r_println!("error: failed to determine the data directory");
+}