Handle Symbolic containers properly

pacwrap-core/src/sync.rs

@@ -19,6 +19,7 @@
 use std::{
     fmt::{Display, Formatter, Result as FmtResult},
     fs::{create_dir, create_dir_all},
+    os::unix::fs::symlink,
     path::Path,
     process::exit,
 };
@@ -189,7 +190,14 @@ pub fn instantiate_container<'a>(handle: &'a ContainerHandle<'a>) -> Result<()>
     let root = handle.vars().root();
     let home = handle.vars().home();
 
-    create_dir(root).prepend_io(|| root.into())?;
+    if let ContainerType::Symbolic = instype {
+        let dep = handle.metadata().dependencies();
+        let dep = dep.last().expect("Dependency element");
+
+        symlink(dep, root).prepend_io(|| root.into())?;
+    } else {
+        create_dir(root).prepend_io(|| root.into())?;
+    }
 
     if let ContainerType::Aggregate | ContainerType::Base = instype {
         if !Path::new(home).exists() {

pacwrap/src/compose.rs

@@ -86,7 +86,11 @@ fn compose_handles<'a>(
     for (instance, config) in compose {
         let handle = compose_handle(instance, config)?;
 
-        if let ContainerType::Base = handle.metadata().container_type() {
+        if let ContainerType::Symbolic = handle.metadata().container_type() {
+            if handle.metadata().dependencies().is_empty() {
+                err!(ErrorKind::Message("Symbolic containers require at least one dependency."))?;
+            }
+        } else if let ContainerType::Base = handle.metadata().container_type() {
             if handle.metadata().dependencies().len() > 0 {
                 err!(ErrorKind::Message("Dependencies cannot be assigned to base containers."))?;
             }

pacwrap/src/remove.rs

@@ -20,7 +20,7 @@
 use std::collections::HashMap;
 
 use pacwrap_core::{
-    config::{cache, init::init},
+    config::{cache, init::init, ContainerType},
     err,
     error::*,
     lock::Lock,
@@ -30,6 +30,7 @@ use pacwrap_core::{
         arguments::{Arguments, InvalidArgument::*, Operand as Op},
         check_root,
     },
+    ErrorKind,
 };
 
 use crate::utils::delete::remove_containers;
@@ -101,7 +102,10 @@ fn engage_aggregator<'a>(
             Op::Short('t') | Op::Long("target") => match args.next() {
                 Some(arg) => match arg {
                     Op::ShortPos('t', target) | Op::LongPos("target", target) => {
-                        cache.get_instance(target)?;
+                        if let ContainerType::Symbolic = cache.get_instance(target)?.metadata().container_type() {
+                            err!(ErrorKind::Message("Symbolic containers cannot be transacted."))?;
+                        }
+
                         current_target = Some(target);
                         targets.push(target);
                     }

pacwrap/src/sync.rs

@@ -220,8 +220,8 @@ fn engage_aggregator<'a>(
                             create = init;
                         } else if let (true, None) = (create, container_type) {
                             err!(ErrorKind::Message("Container type not specified."))?;
-                        } else {
-                            cache.get_instance(target)?;
+                        } else if let ContainerType::Symbolic = cache.get_instance(target)?.metadata().container_type() {
+                            err!(ErrorKind::Message("Symbolic containers cannot be transacted."))?;
                         }
                     }
                     _ => args.invalid_operand()?,

pacwrap/src/utils/symlink.rs

@@ -17,22 +17,16 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-use std::{
-    fs::{create_dir, read_link},
-    os::unix::fs::symlink,
-    path::Path,
-};
-
 use pacwrap_core::{
     config::{cache, ConfigError, Container, ContainerHandle, ContainerType, ContainerVariables},
     constants::{ARROW_CYAN, ARROW_GREEN, BOLD, RESET},
     err,
+    sync::instantiate_container,
     utils::{
         arguments::{InvalidArgument, Operand},
         Arguments,
     },
     Error,
-    ErrorGeneric,
     Result,
 };
 
@@ -74,25 +68,17 @@ pub fn link(args: &mut Arguments) -> Result<()> {
                 ContainerHandle::new(container, container_vars)
             } else {
                 let container_vars = ContainerVariables::new(src);
+                let mut deps = dest_handle.metadata().dependencies();
                 let mut handle = ContainerHandle::from(dest_handle, container_vars);
 
+                deps.push(dest_handle.vars().instance());
                 handle.metadata_mut().set_type(ContainerType::Symbolic);
-                handle.metadata_mut().set_metadata(vec![], vec![]);
+                handle.metadata_mut().set_metadata(deps, vec![]);
                 handle
             },
     };
-    let home = src_handle.vars().home();
-    let root = src_handle.vars().root();
 
-    if Path::new(root).exists() || read_link(root).is_ok() {
-        err!(ConfigError::AlreadyExists(src.to_string()))?;
-    }
-
-    if !Path::new(home).exists() {
-        create_dir(home).prepend_io(|| home.into())?;
-    }
-
-    symlink(dest_handle.vars().instance(), src_handle.vars().root()).prepend_io(|| src_handle.vars().root().into())?;
+    instantiate_container(&src_handle)?;
     src_handle.save()?;
     eprintln!(
         "{} Created symbolic container '{}{src}{}' {} '{}{dest}{}'.",