feat: add migration step to install cmd (#126)

* feat: add migration step to install cmd

* fix: set packages to explicitly installed

* fix: legacy remote check

Oops

* fix: generator

* fix: better legacy detection

* fix: run legacy detection before deployment

Also fix unlink on dir

* fix: legacy file check issue

* fix: handle no legacy

* fix: make sure not to go past home when looking for repo

* fix: wrong dir for default legacy path

* fix: catch errors with deleting legacy install

src/caelestia/utils/dots/packages.py

@@ -73,6 +73,9 @@ class PackageInstaller(ABC):
     def build_install(self, directory: Path) -> list[str]:
         """Build and install the PKGBUILD in `directory`, returning the installed package names."""
 
+    @abstractmethod
+    def is_installed(self, package: str) -> bool: ...
+
     @abstractmethod
     def system_update(self) -> None: ...
 
@@ -92,6 +95,9 @@ class NoopInstaller(PackageInstaller):
         info(f"Skipping local package build (not on Arch): {directory}")
         return []
 
+    def is_installed(self, package: str) -> bool:
+        return False
+
     def system_update(self) -> None:
         info("Skipping system update (not on Arch)")
 
@@ -101,10 +107,18 @@ class ArchInstaller(PackageInstaller):
         self.helper = helper
         self.flags = ["--noconfirm"] if noconfirm else []
 
-    def install(self, packages: list[str], extra_flags: list[str] | None = None) -> None:
+    def install(self, packages: list[str], explicit: bool = True) -> None:
         if not packages:
             return
-        subprocess.run([self.helper, "-S", "--needed", *self.flags, *(extra_flags or []), *packages], check=True)
+
+        cmd = [self.helper, "-S", "--needed", *self.flags]
+        if not explicit:
+            cmd.append("--asdeps")  # Set install reason to dep (does not affect already installed packages)
+        subprocess.run(cmd + packages, check=True)
+
+        # Force install reason to explicit install
+        if explicit:
+            subprocess.run([self.helper, "-D", "--asexplicit", *self.flags, *packages], check=True)
 
     def remove(self, packages: list[str]) -> None:
         if not packages:
@@ -126,7 +140,7 @@ class ArchInstaller(PackageInstaller):
             elif key == "depends":
                 depends.append(value.strip())
 
-        self.install(depends, extra_flags=["--asdeps"])
+        self.install(depends, explicit=False)
 
         # Stop makepkg from resetting sudo
         env = {**os.environ, "PACMAN_AUTH": "sudo"}
@@ -135,5 +149,15 @@ class ArchInstaller(PackageInstaller):
 
         return names
 
+    def is_installed(self, package: str) -> bool:
+        return (
+            subprocess.run(
+                ["pacman", "-Q", package],
+                stdout=subprocess.DEVNULL,
+                stderr=subprocess.DEVNULL,
+            ).returncode
+            == 0
+        )
+
     def system_update(self) -> None:
         subprocess.run([self.helper, "-Syu", *self.flags], check=True)