Merge branch 'main' into hoverbear/ds-435-check-if-running-as-root

.github/workflows/ci.yml

@@ -82,6 +82,33 @@ jobs:
           path: |
             result/bin/harmonic
 
+  RunX86Linux:
+    runs-on: ubuntu-latest
+    needs: BuildX86Linux
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          name: harmonic-x86_64-linux
+      - name: Set executable
+        run: chmod +x ./harmonic
+      - name: Initial install
+        run: sudo RUST_LOG=harmonic=trace RUST_BACKTRACE=full ./harmonic install linux-multi --no-confirm
+      - name: Test run
+        run: |
+          . /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh
+          nix run nixpkgs#fortune
+      - name: Initial uninstall
+        run: sudo RUST_LOG=harmonic=trace RUST_BACKTRACE=full ./harmonic uninstall --no-confirm
+      - name: Repeated install
+        run: sudo RUST_LOG=harmonic=trace RUST_BACKTRACE=full ./harmonic install linux-multi --no-confirm
+      - name: Repeated test run
+        run: |
+          . /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh
+          nix run nixpkgs#fortune
+      - name: Repeated uninstall
+        run: sudo RUST_LOG=harmonic=trace RUST_BACKTRACE=full ./harmonic uninstall --no-confirm
+        
+
   BuildX86Darwin:
     runs-on: macos-latest
     steps:
@@ -99,3 +126,30 @@ jobs:
           name: harmonic-x86_64-darwin
           path: |
             result/bin/harmonic
+
+  RunX86Darwin:
+    runs-on: macos-latest
+    needs: BuildX86Darwin
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          name: harmonic-x86_64-darwin
+      - name: Set executable
+        run: chmod +x ./harmonic
+      - name: Initial install
+        run: sudo RUST_LOG=harmonic=trace RUST_BACKTRACE=full ./harmonic install darwin-multi --no-confirm
+      - name: Test run
+        run: |
+          . /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh
+          nix run nixpkgs#fortune
+      - name: Initial uninstall
+        run: sudo RUST_LOG=harmonic=trace RUST_BACKTRACE=full ./harmonic uninstall --no-confirm
+      - name: Repeated install
+        run: sudo RUST_LOG=harmonic=trace RUST_BACKTRACE=full ./harmonic install darwin-multi --no-confirm
+      - name: Repeated test run
+        run: |
+          . /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh
+          nix run nixpkgs#fortune
+      - name: Repeated uninstall
+        run: sudo RUST_LOG=harmonic=trace RUST_BACKTRACE=full ./harmonic uninstall --no-confirm
+        

flake.nix

@@ -1,5 +1,5 @@
 {
-  description = "riff";
+  description = "harmonic";
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-22.05";

src/action/base/configure_nix_daemon_service.rs

@@ -132,6 +132,15 @@ impl Action for ConfigureNixDaemonService {
                 execute_command(Command::new("systemctl").arg("daemon-reload"))
                     .await
                     .map_err(|e| ConfigureNixDaemonServiceError::Command(e).boxed())?;
+
+                execute_command(
+                    Command::new("systemctl")
+                        .arg("enable")
+                        .arg("--now")
+                        .arg("nix-daemon.socket"),
+                )
+                .await
+                .map_err(|e| ConfigureNixDaemonServiceError::Command(e).boxed())?;
             },
         };
 
@@ -181,11 +190,11 @@ impl Action for ConfigureNixDaemonService {
                 .map_err(|e| ConfigureNixDaemonServiceError::Command(e).boxed())?;
             },
             _ => {
-                execute_command(Command::new("systemctl").args(["disable", SOCKET_SRC]))
+                execute_command(Command::new("systemctl").args(["disable", SOCKET_SRC, "--now"]))
                     .await
                     .map_err(|e| ConfigureNixDaemonServiceError::Command(e).boxed())?;
 
-                execute_command(Command::new("systemctl").args(["disable", SERVICE_SRC]))
+                execute_command(Command::new("systemctl").args(["disable", SERVICE_SRC, "--now"]))
                     .await
                     .map_err(|e| ConfigureNixDaemonServiceError::Command(e).boxed())?;
 
@@ -212,6 +221,10 @@ impl Action for ConfigureNixDaemonService {
         *action_state = ActionState::Uncompleted;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/base/create_directory.rs

@@ -214,6 +214,10 @@ impl Action for CreateDirectory {
         *action_state = ActionState::Uncompleted;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/base/create_file.rs

@@ -188,6 +188,10 @@ impl Action for CreateFile {
         *action_state = ActionState::Uncompleted;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/base/create_group.rs

@@ -160,6 +160,10 @@ impl Action for CreateGroup {
         *action_state = ActionState::Uncompleted;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/base/create_or_append_file.rs

@@ -223,6 +223,10 @@ impl Action for CreateOrAppendFile {
         *action_state = ActionState::Uncompleted;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/base/create_user.rs

@@ -254,6 +254,10 @@ impl Action for CreateUser {
         *action_state = ActionState::Uncompleted;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/base/fetch_nix.rs

@@ -115,6 +115,10 @@ impl Action for FetchNix {
         *action_state = ActionState::Uncompleted;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/base/mod.rs

@@ -0,0 +1,21 @@
+//! Base actions that themselves have no other actions as dependencies
+
+mod configure_nix_daemon_service;
+mod create_directory;
+mod create_file;
+mod create_group;
+mod create_or_append_file;
+mod create_user;
+mod fetch_nix;
+mod move_unpacked_nix;
+mod setup_default_profile;
+
+pub use configure_nix_daemon_service::{ConfigureNixDaemonService, ConfigureNixDaemonServiceError};
+pub use create_directory::{CreateDirectory, CreateDirectoryError};
+pub use create_file::{CreateFile, CreateFileError};
+pub use create_group::{CreateGroup, CreateGroupError};
+pub use create_or_append_file::{CreateOrAppendFile, CreateOrAppendFileError};
+pub use create_user::{CreateUser, CreateUserError};
+pub use fetch_nix::{FetchNix, FetchNixError};
+pub use move_unpacked_nix::{MoveUnpackedNix, MoveUnpackedNixError};
+pub use setup_default_profile::{SetupDefaultProfile, SetupDefaultProfileError};

src/action/base/move_unpacked_nix.rs

@@ -106,6 +106,10 @@ impl Action for MoveUnpackedNix {
         *action_state = ActionState::Uncompleted;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/base/setup_default_profile.rs

@@ -181,6 +181,10 @@ impl Action for SetupDefaultProfile {
         *action_state = ActionState::Completed;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/common/configure_nix.rs

@@ -1,17 +1,15 @@
-use reqwest::Url;
-
 use crate::{
     action::{
-        common::{
-            ConfigureNixDaemonService, ConfigureShellProfile, PlaceChannelConfiguration,
-            PlaceNixConfiguration, SetupDefaultProfile,
-        },
+        base::{ConfigureNixDaemonService, SetupDefaultProfile},
+        common::{ConfigureShellProfile, PlaceChannelConfiguration, PlaceNixConfiguration},
         Action, ActionDescription, ActionState,
     },
     channel_value::ChannelValue,
     BoxableError, CommonSettings,
 };
 
+use reqwest::Url;
+
 #[derive(Debug, serde::Deserialize, serde::Serialize, Clone)]
 pub struct ConfigureNix {
     setup_default_profile: SetupDefaultProfile,
@@ -184,4 +182,8 @@ impl Action for ConfigureNix {
         *action_state = ActionState::Uncompleted;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }

src/action/common/configure_shell_profile.rs

@@ -1,13 +1,10 @@
+use crate::action::base::{CreateOrAppendFile, CreateOrAppendFileError};
+use crate::action::{Action, ActionDescription, ActionState};
+use crate::BoxableError;
+
 use std::path::Path;
-
 use tokio::task::{JoinError, JoinSet};
 
-use crate::action::common::{CreateOrAppendFile, CreateOrAppendFileError};
-use crate::{
-    action::{Action, ActionDescription, ActionState},
-    BoxableError,
-};
-
 const PROFILE_TARGETS: &[&str] = &[
     "/etc/bashrc",
     "/etc/profile.d/nix.sh",
@@ -181,6 +178,10 @@ impl Action for ConfigureShellProfile {
         *action_state = ActionState::Uncompleted;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/common/create_nix_tree.rs

@@ -1,4 +1,4 @@
-use crate::action::common::{CreateDirectory, CreateDirectoryError};
+use crate::action::base::{CreateDirectory, CreateDirectoryError};
 use crate::action::{Action, ActionDescription, ActionState};
 
 const PATHS: &[&str] = &[
@@ -134,6 +134,10 @@ impl Action for CreateNixTree {
         *action_state = ActionState::Uncompleted;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/common/create_users_and_group.rs

@@ -1,14 +1,12 @@
-use tokio::task::{JoinError, JoinSet};
-
 use crate::CommonSettings;
-
 use crate::{
     action::{
-        common::{CreateGroup, CreateGroupError, CreateUser, CreateUserError},
+        base::{CreateGroup, CreateGroupError, CreateUser, CreateUserError},
         Action, ActionDescription, ActionState,
     },
     BoxableError,
 };
+use tokio::task::{JoinError, JoinSet};
 
 #[derive(Debug, serde::Deserialize, serde::Serialize, Clone)]
 pub struct CreateUsersAndGroup {
@@ -229,6 +227,10 @@ impl Action for CreateUsersAndGroup {
         *action_state = ActionState::Uncompleted;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/common/mod.rs

@@ -1,35 +1,17 @@
 /*! Actions which only call other base plugins. */
 
 mod configure_nix;
-mod configure_nix_daemon_service;
 mod configure_shell_profile;
-mod create_directory;
-mod create_file;
-mod create_group;
 mod create_nix_tree;
-mod create_or_append_file;
-mod create_user;
 mod create_users_and_group;
-mod fetch_nix;
-mod move_unpacked_nix;
 mod place_channel_configuration;
 mod place_nix_configuration;
 mod provision_nix;
-mod setup_default_profile;
 
 pub use configure_nix::ConfigureNix;
-pub use configure_nix_daemon_service::{ConfigureNixDaemonService, ConfigureNixDaemonServiceError};
 pub use configure_shell_profile::ConfigureShellProfile;
-pub use create_directory::{CreateDirectory, CreateDirectoryError};
-pub use create_file::{CreateFile, CreateFileError};
-pub use create_group::{CreateGroup, CreateGroupError};
 pub use create_nix_tree::{CreateNixTree, CreateNixTreeError};
-pub use create_or_append_file::{CreateOrAppendFile, CreateOrAppendFileError};
-pub use create_user::{CreateUser, CreateUserError};
 pub use create_users_and_group::{CreateUsersAndGroup, CreateUsersAndGroupError};
-pub use fetch_nix::{FetchNix, FetchNixError};
-pub use move_unpacked_nix::{MoveUnpackedNix, MoveUnpackedNixError};
 pub use place_channel_configuration::{PlaceChannelConfiguration, PlaceChannelConfigurationError};
 pub use place_nix_configuration::{PlaceNixConfiguration, PlaceNixConfigurationError};
 pub use provision_nix::{ProvisionNix, ProvisionNixError};
-pub use setup_default_profile::{SetupDefaultProfile, SetupDefaultProfileError};

src/action/common/place_channel_configuration.rs

@@ -1,11 +1,9 @@
-use reqwest::Url;
-
+use crate::action::base::{CreateFile, CreateFileError};
 use crate::{
     action::{Action, ActionDescription, ActionState},
     BoxableError,
 };
-
-use crate::action::common::{CreateFile, CreateFileError};
+use reqwest::Url;
 
 #[derive(Debug, serde::Deserialize, serde::Serialize, Clone)]
 pub struct PlaceChannelConfiguration {
@@ -130,6 +128,10 @@ impl Action for PlaceChannelConfiguration {
         *action_state = ActionState::Uncompleted;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/common/place_nix_configuration.rs

@@ -1,7 +1,6 @@
+use crate::action::base::{CreateDirectory, CreateDirectoryError, CreateFile, CreateFileError};
 use crate::action::{Action, ActionDescription, ActionState};
 
-use crate::action::common::{CreateDirectory, CreateDirectoryError, CreateFile, CreateFileError};
-
 const NIX_CONF_FOLDER: &str = "/etc/nix";
 const NIX_CONF: &str = "/etc/nix/nix.conf";
 
@@ -115,6 +114,10 @@ impl Action for PlaceNixConfiguration {
         *action_state = ActionState::Uncompleted;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/common/provision_nix.rs

@@ -1,16 +1,13 @@
-use std::path::PathBuf;
-
-use tokio::task::JoinError;
-
-use crate::action::common::{
+use crate::action::base::{
     CreateDirectoryError, FetchNix, FetchNixError, MoveUnpackedNix, MoveUnpackedNixError,
 };
 use crate::CommonSettings;
-
 use crate::{
     action::{Action, ActionDescription, ActionState},
     BoxableError,
 };
+use std::path::PathBuf;
+use tokio::task::JoinError;
 
 use super::{CreateNixTree, CreateNixTreeError, CreateUsersAndGroup, CreateUsersAndGroupError};
 
@@ -168,6 +165,10 @@ impl Action for ProvisionNix {
         *action_state = ActionState::Uncompleted;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/darwin/bootstrap_volume.rs

@@ -106,6 +106,10 @@ impl Action for BootstrapVolume {
         *action_state = ActionState::Completed;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/darwin/create_apfs_volume.rs

@@ -1,12 +1,6 @@
-use std::{
-    path::{Path, PathBuf},
-    time::Duration,
-};
-use tokio::process::Command;
-
 use crate::{
     action::{
-        common::{CreateFile, CreateFileError, CreateOrAppendFile, CreateOrAppendFileError},
+        base::{CreateFile, CreateFileError, CreateOrAppendFile, CreateOrAppendFileError},
         darwin::{
             BootstrapVolume, BootstrapVolumeError, CreateSyntheticObjects,
             CreateSyntheticObjectsError, CreateVolume, CreateVolumeError, EnableOwnership,
@@ -17,6 +11,11 @@ use crate::{
     },
     BoxableError,
 };
+use std::{
+    path::{Path, PathBuf},
+    time::Duration,
+};
+use tokio::process::Command;
 
 const NIX_VOLUME_MOUNTD_DEST: &str = "/Library/LaunchDaemons/org.nixos.darwin-store.plist";
 
@@ -289,6 +288,10 @@ impl Action for CreateApfsVolume {
         *action_state = ActionState::Uncompleted;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/darwin/create_synthetic_objects.rs

@@ -98,6 +98,10 @@ impl Action for CreateSyntheticObjects {
         *action_state = ActionState::Completed;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/darwin/create_volume.rs

@@ -130,6 +130,10 @@ impl Action for CreateVolume {
         *action_state = ActionState::Completed;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/darwin/enable_ownership.rs

@@ -109,6 +109,10 @@ impl Action for EnableOwnership {
         *action_state = ActionState::Completed;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/darwin/encrypt_volume.rs

@@ -86,6 +86,10 @@ impl Action for EncryptVolume {
         *action_state = ActionState::Completed;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/darwin/kickstart_launchctl_service.rs

@@ -96,6 +96,10 @@ impl Action for KickstartLaunchctlService {
         *action_state = ActionState::Completed;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/darwin/unmount_volume.rs

@@ -117,6 +117,10 @@ impl Action for UnmountVolume {
         *action_state = ActionState::Completed;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/linux/create_systemd_sysext.rs

@@ -1,10 +1,9 @@
-use std::path::{Path, PathBuf};
-
-use crate::action::common::{CreateDirectory, CreateDirectoryError, CreateFile, CreateFileError};
+use crate::action::base::{CreateDirectory, CreateDirectoryError, CreateFile, CreateFileError};
 use crate::{
     action::{Action, ActionDescription, ActionState},
     BoxableError,
 };
+use std::path::{Path, PathBuf};
 
 const PATHS: &[&str] = &[
     "usr",
@@ -185,6 +184,10 @@ impl Action for CreateSystemdSysext {
         *action_state = ActionState::Uncompleted;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/linux/start_systemd_unit.rs

@@ -90,14 +90,22 @@ impl Action for StartSystemdUnit {
         tracing::debug!("Stopping systemd unit");
 
         // TODO(@Hoverbear): Handle proxy vars
-        execute_command(Command::new("systemctl").arg("stop").arg(format!("{unit}")))
-            .await
-            .map_err(|e| StartSystemdUnitError::Command(e).boxed())?;
+        execute_command(
+            Command::new("systemctl")
+                .arg("disable")
+                .arg(format!("{unit}")),
+        )
+        .await
+        .map_err(|e| StartSystemdUnitError::Command(e).boxed())?;
 
         tracing::trace!("Stopped systemd unit");
         *action_state = ActionState::Completed;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/linux/systemd_sysext_merge.rs

@@ -1,13 +1,10 @@
-use std::path::PathBuf;
-
-use tokio::process::Command;
-
 use crate::execute_command;
-
 use crate::{
     action::{Action, ActionDescription, ActionState},
     BoxableError,
 };
+use std::path::PathBuf;
+use tokio::process::Command;
 
 #[derive(Debug, serde::Deserialize, serde::Serialize, Clone)]
 pub struct SystemdSysextMerge {
@@ -102,6 +99,10 @@ impl Action for SystemdSysextMerge {
         *action_state = ActionState::Completed;
         Ok(())
     }
+
+    fn action_state(&self) -> ActionState {
+        self.action_state
+    }
 }
 
 #[derive(Debug, thiserror::Error)]

src/action/mod.rs

@@ -1,3 +1,4 @@
+pub mod base;
 pub mod common;
 pub mod darwin;
 pub mod linux;
@@ -13,11 +14,12 @@ pub trait Action: Send + Sync + std::fmt::Debug + dyn_clone::DynClone {
     // They should also have an `async fn plan(args...) -> Result<ActionState<Self>, Box<dyn std::error::Error + Send + Sync>>;`
     async fn execute(&mut self) -> Result<(), Box<dyn std::error::Error + Send + Sync>>;
     async fn revert(&mut self) -> Result<(), Box<dyn std::error::Error + Send + Sync>>;
+    fn action_state(&self) -> ActionState;
 }
 
 dyn_clone::clone_trait_object!(Action);
 
-#[derive(Debug, Serialize, Deserialize, Clone, PartialEq, Eq)]
+#[derive(Debug, Serialize, Deserialize, Clone, PartialEq, Eq, Copy)]
 pub enum ActionState {
     Completed,
     // Only applicable to meta-actions that start multiple sub-actions.

src/cli/subcommand/install.rs

@@ -1,6 +1,11 @@
-use std::{path::PathBuf, process::ExitCode};
+use std::{
+    path::{Path, PathBuf},
+    process::ExitCode,
+};
 
-use crate::{cli::is_root, BuiltinPlanner};
+use crate::{
+    action::ActionState, cli::is_root, plan::RECEIPT_LOCATION, BuiltinPlanner, InstallPlan, Planner,
+};
 use clap::{ArgAction, Parser};
 use eyre::{eyre, WrapErr};
 
@@ -8,7 +13,7 @@ use crate::{cli::CommandExecute, interaction};
 
 /// Execute an install (possibly using an existing plan)
 #[derive(Debug, Parser)]
-#[command(args_conflicts_with_subcommands = true)]
+#[command(args_conflicts_with_subcommands = true, arg_required_else_help = true)]
 pub struct Install {
     #[clap(
         long,
@@ -29,7 +34,7 @@ pub struct Install {
     pub plan: Option<PathBuf>,
 
     #[clap(subcommand)]
-    pub planner: BuiltinPlanner,
+    pub planner: Option<BuiltinPlanner>,
 }
 
 #[async_trait::async_trait]
@@ -49,28 +54,71 @@ impl CommandExecute for Install {
             ));
         }
 
-        let mut plan = match &plan {
-            Some(plan_path) => {
-                let install_plan_string = tokio::fs::read_to_string(&plan_path)
+        let existing_receipt: Option<InstallPlan> = match Path::new(RECEIPT_LOCATION).exists() {
+            true => {
+                let install_plan_string = tokio::fs::read_to_string(&RECEIPT_LOCATION)
                     .await
                     .wrap_err("Reading plan")?;
+                Some(serde_json::from_str(&install_plan_string)?)
+            },
+            false => None,
+        };
+
+        let mut install_plan = match (planner, plan) {
+            (Some(planner), None) => {
+                let chosen_planner: Box<dyn Planner> = planner.clone().boxed();
+
+                match existing_receipt {
+                    Some(existing_receipt) => {
+                        if existing_receipt.planner.typetag_name() != chosen_planner.typetag_name() {
+                            return Err(eyre!("Found existing plan in `{RECEIPT_LOCATION}` which used a different planner, try uninstalling the existing install"))
+                        }
+                        if existing_receipt.planner.settings().map_err(|e| eyre!(e))? != chosen_planner.settings().map_err(|e| eyre!(e))? {
+                            return Err(eyre!("Found existing plan in `{RECEIPT_LOCATION}` which used different planner settings, try uninstalling the existing install"))
+                        }
+                        if existing_receipt.actions.iter().all(|v| v.action_state() == ActionState::Completed) {
+                            return Err(eyre!("Found existing plan in `{RECEIPT_LOCATION}`, with the same settings, already completed, try uninstalling and reinstalling if Nix isn't working"))
+                        }
+                        existing_receipt
+                    } ,
+                    None => {
+                        planner.plan().await.map_err(|e| eyre!(e))?
+                    },
+                }
+            },
+            (None, Some(plan_path)) => {
+                let install_plan_string = tokio::fs::read_to_string(&plan_path)
+                .await
+                .wrap_err("Reading plan")?;
                 serde_json::from_str(&install_plan_string)?
             },
-            None => planner.plan().await.map_err(|e| eyre!(e))?,
+            (None, None) => return Err(eyre!("`--plan` or a planner is required")),
+            (Some(_), Some(_)) => return Err(eyre!("`--plan` conflicts with passing a planner, a planner creates plans, so passing an existing plan doesn't make sense")),
         };
 
         if !no_confirm {
-            if !interaction::confirm(plan.describe_execute(explain).map_err(|e| eyre!(e))?).await? {
+            if !interaction::confirm(
+                install_plan
+                    .describe_execute(explain)
+                    .map_err(|e| eyre!(e))?,
+            )
+            .await?
+            {
                 interaction::clean_exit_with_message("Okay, didn't do anything! Bye!").await;
             }
         }
 
-        if let Err(err) = plan.install().await {
-            tracing::error!("{:?}", eyre!(err));
-            if !interaction::confirm(plan.describe_revert(explain)).await? {
-                interaction::clean_exit_with_message("Okay, didn't do anything! Bye!").await;
+        if let Err(err) = install_plan.install().await {
+            let error = eyre!(err).wrap_err("Install failure");
+            if !no_confirm {
+                tracing::error!("{:?}", error);
+                if !interaction::confirm(install_plan.describe_revert(explain)).await? {
+                    interaction::clean_exit_with_message("Okay, didn't do anything! Bye!").await;
+                }
+                install_plan.revert().await?
+            } else {
+                return Err(error);
             }
-            plan.revert().await?
         }
 
         Ok(ExitCode::SUCCESS)

src/cli/subcommand/uninstall.rs

@@ -1,6 +1,6 @@
 use std::{path::PathBuf, process::ExitCode};
 
-use crate::{cli::is_root, InstallPlan};
+use crate::{cli::is_root, plan::RECEIPT_LOCATION, InstallPlan};
 use clap::{ArgAction, Parser};
 use eyre::{eyre, WrapErr};
 
@@ -23,7 +23,7 @@ pub struct Uninstall {
         global = true
     )]
     pub explain: bool,
-    #[clap(default_value = "/nix/receipt.json")]
+    #[clap(default_value = RECEIPT_LOCATION)]
     pub receipt: PathBuf,
 }
 

src/plan.rs

@@ -8,6 +8,8 @@ use crate::{
     HarmonicError,
 };
 
+pub const RECEIPT_LOCATION: &str = "/nix/receipt.json";
+
 #[derive(Debug, serde::Deserialize, serde::Serialize, Clone)]
 pub struct InstallPlan {
     pub(crate) actions: Vec<Box<dyn Action>>,
@@ -43,7 +45,7 @@ impl InstallPlan {
             },
             planner = planner.typetag_name(),
             plan_settings = planner
-                .describe()?
+                .settings()?
                 .into_iter()
                 .map(|(k, v)| format!("* {k}: {v}", k = k.bold().white()))
                 .collect::<Vec<_>>()
@@ -166,7 +168,7 @@ async fn write_receipt(plan: InstallPlan) -> Result<(), HarmonicError> {
     tokio::fs::create_dir_all("/nix")
         .await
         .map_err(|e| HarmonicError::RecordingReceipt(PathBuf::from("/nix"), e))?;
-    let install_receipt_path = PathBuf::from("/nix/receipt.json");
+    let install_receipt_path = PathBuf::from(RECEIPT_LOCATION);
     let self_json =
         serde_json::to_string_pretty(&plan).map_err(HarmonicError::SerializingReceipt)?;
     tokio::fs::write(&install_receipt_path, self_json)

src/planner/darwin/multi.rs

@@ -98,7 +98,7 @@ impl Planner for DarwinMulti {
         })
     }
 
-    fn describe(
+    fn settings(
         &self,
     ) -> Result<HashMap<String, serde_json::Value>, Box<dyn std::error::Error + Sync + Send>> {
         let Self {

src/planner/linux/multi.rs

@@ -1,13 +1,12 @@
-use std::collections::HashMap;
-
 use crate::{
     action::{
-        common::{ConfigureNix, CreateDirectory, ProvisionNix},
-        linux::StartSystemdUnit,
+        base::CreateDirectory,
+        common::{ConfigureNix, ProvisionNix},
     },
     planner::Planner,
     BuiltinPlanner, CommonSettings, InstallPlan,
 };
+use std::collections::HashMap;
 
 #[derive(Debug, Clone, clap::Parser, serde::Serialize, serde::Deserialize)]
 pub struct LinuxMulti {
@@ -31,12 +30,11 @@ impl Planner for LinuxMulti {
                 Box::new(CreateDirectory::plan("/nix", None, None, 0o0755, true).await?),
                 Box::new(ProvisionNix::plan(self.settings.clone()).await?),
                 Box::new(ConfigureNix::plan(self.settings).await?),
-                Box::new(StartSystemdUnit::plan("nix-daemon.socket".into()).await?),
             ],
         })
     }
 
-    fn describe(
+    fn settings(
         &self,
     ) -> Result<HashMap<String, serde_json::Value>, Box<dyn std::error::Error + Sync + Send>> {
         let Self { settings } = self;

src/planner/mod.rs

@@ -13,9 +13,15 @@ pub trait Planner: std::fmt::Debug + Send + Sync + dyn_clone::DynClone {
     where
         Self: Sized;
     async fn plan(self) -> Result<InstallPlan, Box<dyn std::error::Error + Sync + Send>>;
-    fn describe(
+    fn settings(
         &self,
     ) -> Result<HashMap<String, serde_json::Value>, Box<dyn std::error::Error + Sync + Send>>;
+    fn boxed(self) -> Box<dyn Planner>
+    where
+        Self: Sized + 'static,
+    {
+        Box::new(self)
+    }
 }
 
 dyn_clone::clone_trait_object!(Planner);
@@ -56,6 +62,13 @@ impl BuiltinPlanner {
             BuiltinPlanner::SteamDeck(planner) => planner.plan().await,
         }
     }
+    pub fn boxed(self) -> Box<dyn Planner> {
+        match self {
+            BuiltinPlanner::LinuxMulti(i) => i.boxed(),
+            BuiltinPlanner::DarwinMulti(i) => i.boxed(),
+            BuiltinPlanner::SteamDeck(i) => i.boxed(),
+        }
+    }
 }
 
 #[derive(thiserror::Error, Debug)]

src/planner/specific/steam_deck.rs

@@ -2,7 +2,8 @@ use std::collections::HashMap;
 
 use crate::{
     action::{
-        common::{CreateDirectory, ProvisionNix},
+        base::CreateDirectory,
+        common::ProvisionNix,
         linux::{CreateSystemdSysext, StartSystemdUnit},
     },
     planner::Planner,
@@ -36,7 +37,7 @@ impl Planner for SteamDeck {
         })
     }
 
-    fn describe(
+    fn settings(
         &self,
     ) -> Result<HashMap<String, serde_json::Value>, Box<dyn std::error::Error + Sync + Send>> {
         let Self { settings } = self;