Migrate ALMA to anyhow (#54)

2025-07-26 23:19:29 +02:00 · 2020-05-31 07:38:20 +02:00 · 2020-05-31 07:38:20 +02:00 · 7152901820
commit 7152901820
parent c8b151fe5f
18 changed files with 448 additions and 626 deletions
--- a/Cargo.lock
+++ b/Cargo.lock
@ -1,30 +1,38 @@
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--- a/Cargo.toml
+++ b/Cargo.toml
@ -5,16 +5,16 @@ authors = ["Roey Darwish Dror"]
 edition = "2018"
 [dependencies]
-which = "3.1.0"
+which = "3"
-failure = "0.1.5"
+log = "0.4"
-log = "0.4.6"
+structopt = "0.3"
-structopt = "0.3.11"
+tempfile = "3"
-tempfile = "3.0.5"
+serde = { version = "1", features = ["derive"] }
-serde = { version = "1.0.92", features = ["derive"] }
+toml = "0.5"
-toml = "0.5.1"
+byte-unit = "3"
-byte-unit = "3.0.1"
+nix = "0.17"
-nix = "0.17.0"
+env_logger = "0.7"
-env_logger = "0.6.2"
+pretty_env_logger = "0.4"
-pretty_env_logger = "0.4.0"
+dialoguer = "0.6"
-dialoguer = "0.5.0"
+console = "0.11"
-console = "0.9.2"
+anyhow = "1"
--- a/src/aur.rs
+++ b/src/aur.rs
@ -1,4 +1,4 @@
-use crate::error::ErrorKind;
+use anyhow::anyhow;
 use std::str::FromStr;
 pub struct AurHelper {
@ -7,9 +7,9 @@ pub struct AurHelper {
 }
 impl FromStr for AurHelper {
-    type Err = ErrorKind;
+    type Err = anyhow::Error;
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
+    fn from_str(s: &str) -> anyhow::Result<Self> {
        match s {
            "yay" => Ok(AurHelper {
                name: String::from("yay"),
@ -32,7 +32,7 @@ impl FromStr for AurHelper {
                    String::from("--noconfirm"),
                ],
            }),
-            _ => Err(ErrorKind::AurHelper {}),
+            _ => Err(anyhow!("Error parsing AUR helper string: {}", s)),
        }
    }
 }
--- a/src/error.rs
+++ b/src/error.rs
@ -1,133 +0,0 @@
 use failure::{Backtrace, Context, Fail};
 use std::fmt::{self, Display};
 #[derive(Debug)]
 pub struct Error {
    inner: Context<ErrorKind>,
 }
 #[derive(Clone, Eq, PartialEq, Debug, Fail)]
 pub enum ErrorKind {
    #[fail(display = "Error quering information about the block device")]
    DeviceQuery,
    #[fail(display = "Invalid device name")]
    InvalidDeviceName,
    #[fail(display = "The given block device is neither removable nor a loop device")]
    DangerousDevice,
    #[fail(display = "Partition {} does not exist", _0)]
    NoSuchPartition(u8),
    #[fail(display = "Could not find {}", _0)]
    NoTool(&'static str),
    #[fail(display = "Error creating a temporary directory")]
    TmpDirError,
    #[fail(display = "Partitioning error")]
    Partitioning,
    #[fail(display = "Error formatting filesystems")]
    Formatting,
    #[fail(display = "Error mounting filesystems")]
    Mounting,
    #[fail(display = "Error creating the boot directory")]
    CreateBoot,
    #[fail(display = "Pacstrap error")]
    Pacstrap,
    #[fail(display = "fstab error")]
    Fstab,
    #[fail(display = "Post installation configuration error")]
    PostInstallation,
    #[fail(display = "Initramfs error")]
    Initramfs,
    #[fail(display = "Bootloader error")]
    Bootloader,
    #[fail(display = "Error caused by the interactive mode")]
    Interactive,
    #[fail(display = "Failed umounting filesystems")]
    UmountFailure,
    #[fail(display = "Error setting up an encrypted device")]
    LuksSetup,
    #[fail(display = "Error opening the encrypted device")]
    LuksOpen,
    #[fail(display = "Error closing the encrypted device")]
    LuksClose,
    #[fail(display = "Error detecting whether the root partition is an encrypted device")]
    LuksDetection,
    #[fail(display = "Error setting the locale")]
    Locale,
    #[fail(display = "Failed launching Qemu")]
    Qemu,
    #[fail(display = "Error loading preset \"{}\"", _0)]
    Preset(String),
    #[fail(display = "Missing environment variables \"{:?}\"", _0)]
    MissingEnvironmentVariables(Vec<String>),
    #[fail(display = "Error executing preset script")]
    PresetScript,
    #[fail(display = "Error parsing AUR helper string")]
    AurHelper,
    #[fail(display = "Error creating the image")]
    Image,
    #[fail(display = "Error setting up a loop device: {}", _0)]
    Losetup(String),
    #[fail(display = "Error querying storage devices")]
    StorageDevicesQuery,
    #[fail(display = "There are no removable devices")]
    NoRemovableDevices,
 }
 impl Fail for Error {
    fn cause(&self) -> Option<&dyn Fail> {
        self.inner.cause()
    }
    fn backtrace(&self) -> Option<&Backtrace> {
        self.inner.backtrace()
    }
 }
 impl Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        Display::fmt(&self.inner, f)
    }
 }
 impl From<ErrorKind> for Error {
    fn from(kind: ErrorKind) -> Error {
        Error {
            inner: Context::new(kind),
        }
    }
 }
 impl From<Context<ErrorKind>> for Error {
    fn from(inner: Context<ErrorKind>) -> Error {
        Error { inner }
    }
 }
--- a/src/initcpio.rs
+++ b/src/initcpio.rs
@ -9,7 +9,7 @@ impl Initcpio {
        Self { encrypted }
    }
-    pub fn to_config(&self) -> String {
+    pub fn to_config(&self) -> anyhow::Result<String> {
        let mut output = String::from(
            "MODULES=()
 BINARIES=()
@ -18,11 +18,11 @@ HOOKS=(base udev keyboard consolefont block ",
        );
        if self.encrypted {
-            output.write_str("encrypt ").unwrap();
+            output.write_str("encrypt ")?;
        }
-        output.write_str("filesystems keyboard fsck)\n").unwrap();
+        output.write_str("filesystems keyboard fsck)\n")?;
-        output
+        Ok(output)
    }
 }
--- a/src/main.rs
+++ b/src/main.rs
@ -1,20 +1,17 @@
 mod args;
 mod aur;
 mod constants;
 mod error;
 mod initcpio;
 mod presets;
 mod process;
 mod storage;
 mod tool;
 use anyhow::{anyhow, Context};
 use args::Command;
 use byte_unit::Byte;
 use console::style;
 use dialoguer::{theme::ColorfulTheme, Select};
 use error::Error;
 use error::ErrorKind;
 use failure::{Fail, ResultExt};
 use log::{debug, error, info, log_enabled, Level, LevelFilter};
 use process::CommandExt;
 use std::collections::HashSet;
@ -22,7 +19,7 @@ use std::fs;
 use std::io::Write;
 use std::os::unix::fs::PermissionsExt;
 use std::path::{Path, PathBuf};
-use std::process::{exit, Command as ProcessCommand};
+use std::process::Command as ProcessCommand;
 use std::thread;
 use std::time::Duration;
 use storage::EncryptedDevice;
@ -31,7 +28,7 @@ use structopt::StructOpt;
 use tempfile::tempdir;
 use tool::Tool;
-fn main() {
+fn main() -> anyhow::Result<()> {
    // Get struct of args using structopt
    let app = args::App::from_args();
@ -46,26 +43,13 @@ fn main() {
    builder.init();
    // Match command from arguments and run relevant code
-    let result = match app.cmd {
+    match app.cmd {
        Command::Create(command) => create(command),
        Command::Chroot(command) => tool::chroot(command),
        Command::Qemu(command) => tool::qemu(command),
-    };
+    }?;
-    // Check if command return an Error
+    Ok(())
    // Print all causes to stderr if so
    match result {
        Ok(()) => {
            exit(0);
        }
        Err(error) => {
            error!("{}", error);
            for cause in (&error as &dyn Fail).iter_causes() {
                error!("Caused by: {}", cause);
            }
            exit(1);
        }
    }
 }
 /// Remove swap entry from fstab and any commented lines
@ -82,7 +66,7 @@ fn fix_fstab(fstab: &str) -> String {
 }
 /// Creates a file at the path provided, and mounts it to a loop device
-fn create_image(path: &Path, size: Byte, overwrite: bool) -> Result<LoopDevice, Error> {
+fn create_image(path: &Path, size: Byte, overwrite: bool) -> anyhow::Result<LoopDevice> {
    {
        let mut options = fs::OpenOptions::new();
@ -92,21 +76,21 @@ fn create_image(path: &Path, size: Byte, overwrite: bool) -> Result<LoopDevice,
        } else {
            options.create_new(true);
        }
-        let file = options.open(path).context(ErrorKind::Image)?;
+        let file = options.open(path).context("Error creating the image")?;
        file.set_len(size.get_bytes() as u64)
-            .context(ErrorKind::Image)?;
+            .context("Error creating the image")?;
    }
    LoopDevice::create(path)
 }
 /// Requests selection of block device (no device was given in the arguments)
-fn select_block_device(allow_non_removable: bool) -> Result<PathBuf, Error> {
+fn select_block_device(allow_non_removable: bool) -> anyhow::Result<PathBuf> {
    let devices = storage::get_storage_devices(allow_non_removable)?;
    if devices.is_empty() {
-        return Err(ErrorKind::NoRemovableDevices.into());
+        return Err(anyhow!("There are no removable devices"));
    }
    if allow_non_removable {
@ -122,15 +106,14 @@ fn select_block_device(allow_non_removable: bool) -> Result<PathBuf, Error> {
        .with_prompt("Select a removable device")
        .default(0)
        .items(&devices)
-        .interact()
+        .interact()?;
        .unwrap();
    Ok(PathBuf::from("/dev").join(&devices[selection].name))
 }
 /// Creates the installation
 #[allow(clippy::cognitive_complexity)] // TODO: Split steps into functions and remove this
-fn create(command: args::CreateCommand) -> Result<(), Error> {
+fn create(command: args::CreateCommand) -> anyhow::Result<()> {
    let presets = presets::PresetsCollection::load(&command.presets)?;
    let sgdisk = Tool::find("sgdisk")?;
@ -173,7 +156,7 @@ fn create(command: args::CreateCommand) -> Result<(), Error> {
        command.allow_non_removable,
    )?;
-    let mount_point = tempdir().context(ErrorKind::TmpDirError)?;
+    let mount_point = tempdir().context("Error creating a temporary directory")?;
    let disk_path = storage_device.path();
    info!("Partitioning the block device");
@ -191,7 +174,8 @@ fn create(command: args::CreateCommand) -> Result<(), Error> {
            "--typecode=2:EF02",
        ])
        .arg(&disk_path)
-        .run(ErrorKind::Partitioning)?;
+        .run()
        .context("Partitioning error")?;
    thread::sleep(Duration::from_millis(1000));
@ -252,23 +236,26 @@ fn create(command: args::CreateCommand) -> Result<(), Error> {
        .arg(mount_point.path())
        .args(packages)
        .args(&command.extra_packages)
-        .run(ErrorKind::Pacstrap)?;
+        .run()
        .context("Pacstrap error")?;
    let fstab = fix_fstab(
        &genfstab
            .execute()
            .arg("-U")
            .arg(mount_point.path())
-            .run_text_output(ErrorKind::Fstab)?,
+            .run_text_output()
            .context("fstab error")?,
    );
    debug!("fstab:\n{}", fstab);
-    fs::write(mount_point.path().join("etc/fstab"), fstab).context(ErrorKind::Fstab)?;
+    fs::write(mount_point.path().join("etc/fstab"), fstab).context("fstab error")?;
    if presets.aur_packages.len() > 0 {
        arch_chroot
            .execute()
            .arg(mount_point.path())
            .args(&["useradd", "-m", "aur"])
-            .run(ErrorKind::PostInstallation)?;
+            .run()
            .context("Failed to create temporary user to install AUR packages")?;
        arch_chroot
            .execute()
@ -279,7 +266,8 @@ fn create(command: args::CreateCommand) -> Result<(), Error> {
                "s/# %wheel ALL=(ALL) NOPASSWD: ALL/aur ALL=(ALL) NOPASSWD: ALL/g",
            ])
            .arg("/etc/sudoers")
-            .run(ErrorKind::PostInstallation)?;
+            .run()
            .context("Failed to modify sudoers file for AUR packages")?;
        arch_chroot
            .execute()
@ -292,7 +280,8 @@ fn create(command: args::CreateCommand) -> Result<(), Error> {
                &command.aur_helper.name
            ))
            .arg(format!("/home/aur/{}", &command.aur_helper.name))
-            .run(ErrorKind::PostInstallation)?;
+            .run()
            .context("Failed to clone AUR helper package")?;
        arch_chroot
            .execute()
@ -305,7 +294,8 @@ fn create(command: args::CreateCommand) -> Result<(), Error> {
                    &command.aur_helper.name
                ),
            ])
-            .run(ErrorKind::PostInstallation)?;
+            .run()
            .context("Failed to build AUR helper")?;
        arch_chroot
            .execute()
@ -314,14 +304,16 @@ fn create(command: args::CreateCommand) -> Result<(), Error> {
            .args(&command.aur_helper.install_command)
            .args(presets.aur_packages)
            .args(&command.aur_packages)
-            .run(ErrorKind::PostInstallation)?;
+            .run()
            .context("Failed to install AUR packages")?;
        // Clean up aur user:
        arch_chroot
            .execute()
            .arg(mount_point.path())
            .args(&["userdel", "-r", "aur"])
-            .run(ErrorKind::PostInstallation)?;
+            .run()
            .context("Failed to delete temporary aur user")?;
        arch_chroot
            .execute()
@ -332,7 +324,8 @@ fn create(command: args::CreateCommand) -> Result<(), Error> {
                "s/aur ALL=(ALL) NOPASSWD: ALL/# %wheel ALL=(ALL) NOPASSWD: ALL/g",
            ])
            .arg("/etc/sudoers")
-            .run(ErrorKind::PostInstallation)?;
+            .run()
            .context("Failed to undo sudoers changes")?;
    }
    if !presets.scripts.is_empty() {
        info!("Running custom scripts");
@ -347,23 +340,23 @@ fn create(command: args::CreateCommand) -> Result<(), Error> {
                    mount_point
                        .path()
                        .join(PathBuf::from("shared_dirs/"))
-                        .join(dir.file_name().unwrap()),
+                        .join(dir.file_name().expect("Dir had no filename")),
                )
-                .context(ErrorKind::PresetScript)?;
+                .context("Failed mounting shared directories in preset")?;
                // Bind mount shared directories
                let target = mount_point
                    .path()
                    .join(PathBuf::from("shared_dirs/"))
-                    .join(dir.file_name().unwrap());
+                    .join(dir.file_name().expect("Dir had no filename"));
                bind_mount_stack
                    .bind_mount(dir.clone(), target, None)
-                    .context(ErrorKind::Mounting)?;
+                    .context("Failed mounting shared directories in preset")?;
            }
        }
-        let mut script_file =
+        let mut script_file = tempfile::NamedTempFile::new_in(mount_point.path())
-            tempfile::NamedTempFile::new_in(mount_point.path()).context(ErrorKind::PresetScript)?;
+            .context("Failed creating temporary preset script")?;
        script_file
            .write_all(script.script_text.as_bytes())
            .and_then(|_| script_file.as_file_mut().metadata())
@ -372,14 +365,21 @@ fn create(command: args::CreateCommand) -> Result<(), Error> {
                permissions.set_mode(0o755);
                fs::set_permissions(script_file.path(), permissions)
            })
-            .context(ErrorKind::PresetScript)?;
+            .context("Failed creating temporary preset script")?;
        let script_path = script_file.into_temp_path();
        arch_chroot
            .execute()
            .arg(mount_point.path())
-            .arg(Path::new("/").join(script_path.file_name().unwrap()))
+            .arg(
-            .run(ErrorKind::PostInstallation)?;
+                Path::new("/").join(
                    script_path
                        .file_name()
                        .expect("Script path had no file name"),
                ),
            )
            .run()
            .context("Failed running preset script")?;
    }
    info!("Performing post installation tasks");
@ -388,14 +388,15 @@ fn create(command: args::CreateCommand) -> Result<(), Error> {
        .execute()
        .arg(mount_point.path())
        .args(&["systemctl", "enable", "NetworkManager"])
-        .run(ErrorKind::PostInstallation)?;
+        .run()
        .context("Failed to enable NetworkManager")?;
    info!("Configuring journald");
    fs::write(
        mount_point.path().join("etc/systemd/journald.conf"),
        constants::JOURNALD_CONF,
    )
-    .context(ErrorKind::PostInstallation)?;
+    .context("Failed to write to journald.conf")?;
    info!("Setting locale");
    fs::OpenOptions::new()
@ -403,53 +404,56 @@ fn create(command: args::CreateCommand) -> Result<(), Error> {
        .write(true)
        .open(mount_point.path().join("etc/locale.gen"))
        .and_then(|mut locale_gen| locale_gen.write_all(b"en_US.UTF-8 UTF-8\n"))
-        .context(ErrorKind::Locale)?;
+        .context("Failed to create locale.gen")?;
    fs::write(
        mount_point.path().join("etc/locale.conf"),
        "LANG=en_US.UTF-8",
    )
-    .context(ErrorKind::Locale)?;
+    .context("Failed to write to locale.conf")?;
    arch_chroot
        .execute()
        .arg(mount_point.path())
        .arg("locale-gen")
-        .run(ErrorKind::Locale)?;
+        .run()
        .context("locale-gen failed")?;
    info!("Generating initramfs");
    fs::write(
        mount_point.path().join("etc/mkinitcpio.conf"),
-        initcpio::Initcpio::new(encrypted_root.is_some()).to_config(),
+        initcpio::Initcpio::new(encrypted_root.is_some()).to_config()?,
    )
-    .context(ErrorKind::Initramfs)?;
+    .context("Failed to write to mkinitcpio.conf")?;
    arch_chroot
        .execute()
        .arg(mount_point.path())
        .args(&["mkinitcpio", "-p", "linux"])
-        .run(ErrorKind::Initramfs)?;
+        .run()
        .context("Failed to run mkinitcpio - do you have the base and linux packages installed?")?;
    if encrypted_root.is_some() {
        debug!("Setting up GRUB for an encrypted root partition");
        let uuid = blkid
-            .unwrap()
+            .expect("No tool for blkid")
            .execute()
            .arg(root_partition_base.path())
            .args(&["-o", "value", "-s", "UUID"])
-            .run_text_output(ErrorKind::Partitioning)?;
+            .run_text_output()
            .context("Failed to run blkid")?;
        let trimmed = uuid.trim();
        debug!("Root partition UUID: {}", trimmed);
        let mut grub_file = fs::OpenOptions::new()
            .append(true)
            .open(mount_point.path().join("etc/default/grub"))
-            .context(ErrorKind::Bootloader)?;
+            .context("Failed to create /etc/default/grub")?;
        write!(
            &mut grub_file,
            "GRUB_CMDLINE_LINUX=\"cryptdevice=UUID={}:luks_root\"",
            trimmed
        )
-        .context(ErrorKind::Bootloader)?;
+        .context("Failed to write to /etc/default/grub")?;
    }
    info!("Installing the Bootloader");
@ -458,7 +462,7 @@ fn create(command: args::CreateCommand) -> Result<(), Error> {
        .arg(mount_point.path())
        .args(&["bash", "-c"])
        .arg(format!("grub-install --target=i386-pc --boot-directory /boot {} && grub-install --target=x86_64-efi --efi-directory /boot --boot-directory /boot --removable &&  grub-mkconfig -o /boot/grub/grub.cfg", disk_path.display()))
-        .run(ErrorKind::Bootloader)?;
+        .run().context("Failed to install grub")?;
    debug!(
        "GRUB configuration: {}",
@ -471,7 +475,8 @@ fn create(command: args::CreateCommand) -> Result<(), Error> {
        arch_chroot
            .execute()
            .arg(mount_point.path())
-            .run(ErrorKind::Interactive)?;
+            .run()
            .context("Failed to enter interactive chroot")?;
    }
    info!("Unmounting filesystems");
--- a/src/presets.rs
+++ b/src/presets.rs
@ -1,5 +1,4 @@
-use crate::error::{Error, ErrorKind};
+use anyhow::{anyhow, Context};
 use failure::ResultExt;
 use serde::Deserialize;
 use std::collections::HashSet;
 use std::env;
@ -34,11 +33,9 @@ fn visit_dirs(dir: &Path, filevec: &mut Vec<PathBuf>) -> Result<(), io::Error> {
 }
 impl Preset {
-    fn load(path: &Path) -> Result<Self, Error> {
+    fn load(path: &Path) -> anyhow::Result<Self> {
-        let data = fs::read_to_string(path)
+        let data = fs::read_to_string(path).with_context(|| format!("{}", path.display()))?;
-            .with_context(|_| ErrorKind::Preset(format!("{}", path.display())))?;
+        Ok(toml::from_str(&data).with_context(|| format!("{}", path.display()))?)
        Ok(toml::from_str(&data)
            .with_context(|_| ErrorKind::Preset(format!("{}", path.display())))?)
    }
    fn process(
@ -48,7 +45,7 @@ impl Preset {
        environment_variables: &mut HashSet<String>,
        path: &PathBuf,
        aur_packages: &mut HashSet<String>,
-    ) -> Result<(), ErrorKind> {
+    ) -> anyhow::Result<()> {
        if let Some(preset_packages) = &self.packages {
            packages.extend(preset_packages.clone());
        }
@ -73,18 +70,18 @@ impl Preset {
                        x.iter()
                            .cloned()
                            .map(|y| {
-                                let full_path = path.parent().unwrap().join(&y);
+                                let full_path = path.parent().expect("Path has no parent").join(&y);
                                if full_path.is_dir() {
                                    Ok(full_path)
                                } else {
-                                    Err(ErrorKind::Preset(format!(
+                                    Err(anyhow!(
                                        "Preset: {} - shared directory: {} is not directory",
                                        path.display(),
                                        y.display()
-                                    )))
+                                    ))
                                }
                            })
-                            .collect::<Result<Vec<_>, ErrorKind>>()
+                            .collect::<anyhow::Result<Vec<_>>>()
                    })
                    .map_or(Ok(None), |r| r.map(Some))?,
            });
@ -105,7 +102,7 @@ pub struct PresetsCollection {
 }
 impl PresetsCollection {
-    pub fn load(list: &[PathBuf]) -> Result<Self, Error> {
+    pub fn load(list: &[PathBuf]) -> anyhow::Result<Self> {
        let mut packages = HashSet::new();
        let mut aur_packages = HashSet::new();
        let mut scripts: Vec<Script> = Vec::new();
@ -117,7 +114,7 @@ impl PresetsCollection {
                // Recursively load directories of preset files
                let mut dir_paths: Vec<PathBuf> = Vec::new();
                visit_dirs(&preset, &mut dir_paths)
-                    .with_context(|_| ErrorKind::Preset(format!("{}", preset.display())))?;
+                    .with_context(|| format!("{}", preset.display()))?;
                // Order not guaranteed so we sort
                // In the future may want to support numerical sort i.e. 15_... < 100_...
@ -148,7 +145,10 @@ impl PresetsCollection {
            .collect();
        if !missing_envrionments.is_empty() {
-            return Err(ErrorKind::MissingEnvironmentVariables(missing_envrionments).into());
+            return Err(anyhow!(
                "Missing environment variables {:?}",
                missing_envrionments
            ));
        }
        Ok(Self {
--- a/src/process.rs
+++ b/src/process.rs
@ -1,51 +1,35 @@
-use super::error::{Error, ErrorKind};
+use anyhow::anyhow;
 use failure::{Fail, ResultExt};
 use log::error;
-use std::process::{Command, ExitStatus};
+use std::process::Command;
 use std::str;
 #[derive(Debug, Fail)]
 enum ProcessError {
    #[fail(display = "{}", _0)]
    BadExitCode(ExitStatus),
    #[fail(display = "Process output isn't valid UTF-8")]
    InvalidUtf8,
 }
 pub trait CommandExt {
-    fn run(&mut self, context: ErrorKind) -> Result<(), Error>;
+    fn run(&mut self) -> anyhow::Result<()>;
-    fn run_text_output(&mut self, context: ErrorKind) -> Result<String, Error>;
+    fn run_text_output(&mut self) -> anyhow::Result<String>;
 }
 impl CommandExt for Command {
-    fn run(&mut self, context: ErrorKind) -> Result<(), Error> {
+    fn run(&mut self) -> anyhow::Result<()> {
-        let exit_status = self
+        let exit_status = self.spawn()?.wait()?;
            .spawn()
            .with_context(|_| context.clone())?
            .wait()
            .with_context(|_| context.clone())?;
        if !exit_status.success() {
-            Err(ProcessError::BadExitCode(exit_status)).with_context(|_| context.clone())?;
+            Err(anyhow!("Bad exit code: {}", exit_status))?;
        }
        Ok(())
    }
-    fn run_text_output(&mut self, context: ErrorKind) -> Result<String, Error> {
+    fn run_text_output(&mut self) -> anyhow::Result<String> {
-        let output = self.output().with_context(|_| context.clone())?;
+        let output = self.output()?;
        if !output.status.success() {
            let error = str::from_utf8(&output.stderr).unwrap_or("[INVALID UTF8]");
            error!("{}", error);
-            Err(ProcessError::BadExitCode(output.status)).with_context(|_| context.clone())?;
+            Err(anyhow!("Bad exit code: {}", output.status))?;
        }
-        Ok(String::from(
+        Ok(String::from(str::from_utf8(&output.stdout).map_err(
-            str::from_utf8(&output.stdout)
+            |_| anyhow!("Process output is not valid UTF-8"),
-                .map_err(|_| ProcessError::InvalidUtf8)
+        )?))
                .with_context(|_| context.clone())?,
        ))
    }
 }
--- a/src/storage/crypt.rs
+++ b/src/storage/crypt.rs
@ -1,8 +1,7 @@
 use super::markers::BlockDevice;
 use crate::error::{Error, ErrorKind};
 use crate::process::CommandExt;
 use crate::tool::Tool;
-use failure::ResultExt;
+use anyhow::Context;
 use log::{debug, warn};
 use std::fs;
 use std::io::Read;
@ -21,14 +20,15 @@ pub struct EncryptedDevice<'t, 'o> {
 }
 impl<'t, 'o> EncryptedDevice<'t, 'o> {
-    pub fn prepare(cryptsetup: &Tool, device: &dyn BlockDevice) -> Result<(), Error> {
+    pub fn prepare(cryptsetup: &Tool, device: &dyn BlockDevice) -> anyhow::Result<()> {
        debug!("Preparing encrypted device in {}", device.path().display());
        cryptsetup
            .execute()
            .arg("luksFormat")
            .arg("-q")
            .arg(device.path())
-            .run(ErrorKind::LuksSetup)?;
+            .run()
            .context("Error setting up an encrypted device")?;
        Ok(())
    }
@ -37,7 +37,7 @@ impl<'t, 'o> EncryptedDevice<'t, 'o> {
        cryptsetup: &'t Tool,
        device: &'o dyn BlockDevice,
        name: String,
-    ) -> Result<EncryptedDevice<'t, 'o>, Error> {
+    ) -> anyhow::Result<EncryptedDevice<'t, 'o>> {
        debug!(
            "Opening encrypted device {} as {}",
            device.path().display(),
@ -48,7 +48,8 @@ impl<'t, 'o> EncryptedDevice<'t, 'o> {
            .arg("open")
            .arg(device.path())
            .arg(&name)
-            .run(ErrorKind::LuksOpen)?;
+            .run()
            .context("Error opening the encrypted device")?;
        let path = PathBuf::from("/dev/mapper").join(&name);
        Ok(Self {
@ -59,13 +60,14 @@ impl<'t, 'o> EncryptedDevice<'t, 'o> {
        })
    }
-    fn _close(&mut self) -> Result<(), Error> {
+    fn _close(&mut self) -> anyhow::Result<()> {
        debug!("Closing encrypted device {}", self.name);
        self.cryptsetup
            .execute()
            .arg("close")
            .arg(&self.name)
-            .run(ErrorKind::LuksClose)?;
+            .run()
            .context("Error closing the encrypted device")?;
        Ok(())
    }
@ -85,16 +87,16 @@ impl<'t, 'o> BlockDevice for EncryptedDevice<'t, 'o> {
    }
 }
-pub fn is_encrypted_device(device: &dyn BlockDevice) -> Result<bool, Error> {
+pub fn is_encrypted_device(device: &dyn BlockDevice) -> anyhow::Result<bool> {
    let mut f = fs::OpenOptions::new()
        .read(true)
        .write(false)
        .open(device.path())
-        .context(ErrorKind::LuksDetection)?;
+        .context("Error detecting whether the root partition is an encrypted device")?;
    let mut buffer = [0; 6];
    f.read_exact(&mut buffer)
-        .context(ErrorKind::LuksDetection)?;
+        .context("Error detecting whether the root partition is an encrypted device")?;
    Ok(buffer == LUKS_MAGIC_1 || buffer == LUKS_MAGIC_2)
 }
--- a/src/storage/filesystem.rs
+++ b/src/storage/filesystem.rs
@ -1,9 +1,6 @@
 use super::markers::BlockDevice;
-use crate::{
+use crate::{process::CommandExt, tool::Tool};
-    error::{Error, ErrorKind},
+use anyhow::Context;
    process::CommandExt,
    tool::Tool,
 };
 #[derive(Debug, Clone, Copy)]
 pub enum FilesystemType {
@ -31,14 +28,14 @@ impl<'a> Filesystem<'a> {
        block: &'a dyn BlockDevice,
        fs_type: FilesystemType,
        mkfs: &Tool,
-    ) -> Result<Self, Error> {
+    ) -> anyhow::Result<Self> {
        let mut command = mkfs.execute();
        match fs_type {
            FilesystemType::Ext4 => command.arg("-F").arg(block.path()),
            FilesystemType::Vfat => command.arg("-F32").arg(block.path()),
        };
-        command.run(ErrorKind::Formatting)?;
+        command.run().context("Error formatting filesystem")?;
        Ok(Self { fs_type, block })
    }
--- a/src/storage/loop_device.rs
+++ b/src/storage/loop_device.rs
@ -1,6 +1,5 @@
 use crate::error::{Error, ErrorKind};
 use crate::tool::Tool;
-use failure::ResultExt;
+use anyhow::{anyhow, Context};
 use log::info;
 use std::path::{Path, PathBuf};
@ -11,20 +10,24 @@ pub struct LoopDevice {
 }
 impl LoopDevice {
-    pub fn create(file: &Path) -> Result<Self, Error> {
+    pub fn create(file: &Path) -> anyhow::Result<Self> {
        let losetup = Tool::find("losetup")?;
        let output = losetup
            .execute()
            .args(&["--find", "-P", "--show"])
            .arg(file)
            .output()
-            .context(ErrorKind::Image)?;
+            .context("Error creating the image")?;
        if !output.status.success() {
-            return Err(ErrorKind::Losetup(String::from_utf8(output.stderr).unwrap()).into());
+            return Err(anyhow!(String::from_utf8(output.stderr)?));
        }
-        let path = PathBuf::from(String::from_utf8(output.stdout).unwrap().trim());
+        let path = PathBuf::from(
            String::from_utf8(output.stdout)
                .context("Output not valid UTF-8")?
                .trim(),
        );
        info!("Mounted {} to {}", file.display(), path.display());
        Ok(LoopDevice { path, losetup })
@ -43,7 +46,7 @@ impl Drop for LoopDevice {
            .arg("-d")
            .arg(&self.path)
            .spawn()
-            .unwrap()
+            .expect("Failed to spawn command to detach loop device")
            .wait()
            .ok();
    }
--- a/src/storage/mount_stack.rs
+++ b/src/storage/mount_stack.rs
@ -1,6 +1,5 @@
 use super::Filesystem;
-use crate::error::{Error, ErrorKind};
+use anyhow::anyhow;
 use failure::Fail;
 use log::{debug, warn};
 use nix::mount::{mount, umount, MsFlags};
 use std::marker::PhantomData;
@ -56,21 +55,25 @@ impl<'a> MountStack<'a> {
        Ok(())
    }
-    fn _umount(&mut self) -> Result<(), Error> {
+    fn _umount(&mut self) -> anyhow::Result<()> {
        let mut result = Ok(());
        while let Some(target) = self.targets.pop() {
            debug!("Unmounting {}", target.display());
            if let Err(e) = umount(&target) {
                warn!("Unable to umount {}: {}", target.display(), e);
-                result = Err(Error::from(e.context(ErrorKind::UmountFailure)));
+                result = Err(anyhow!(
                    "Failed unmounting filesystem: {}, {}",
                    target.display(),
                    e
                ));
            };
        }
        result
    }
-    pub fn umount(mut self) -> Result<(), Error> {
+    pub fn umount(mut self) -> anyhow::Result<()> {
        self._umount()
    }
 }
--- a/src/storage/removeable_devices.rs
+++ b/src/storage/removeable_devices.rs
@ -1,6 +1,5 @@
-use crate::error::{Error, ErrorKind};
+use anyhow::Context;
 use byte_unit::Byte;
 use failure::ResultExt;
 use std::{fmt, fs};
 #[derive(Debug)]
@ -27,16 +26,16 @@ fn trimmed(source: String) -> String {
    String::from(source.trim_end())
 }
-pub fn get_storage_devices(allow_non_removable: bool) -> Result<Vec<Device>, Error> {
+pub fn get_storage_devices(allow_non_removable: bool) -> anyhow::Result<Vec<Device>> {
    let mut result = Vec::new();
-    for entry in fs::read_dir("/sys/block").context(ErrorKind::StorageDevicesQuery)? {
+    for entry in fs::read_dir("/sys/block").context("Error querying storage devices")? {
-        let entry = entry.context(ErrorKind::StorageDevicesQuery)?;
+        let entry = entry.context("Error querying storage devices")?;
        let removable = allow_non_removable
            || fs::read_to_string(entry.path().join("removable"))
                .map(|v| v == "1\n")
-                .context(ErrorKind::StorageDevicesQuery)?;
+                .context("Error querying storage devices")?;
        if !removable {
            continue;
@ -44,7 +43,7 @@ pub fn get_storage_devices(allow_non_removable: bool) -> Result<Vec<Device>, Err
        let model = fs::read_to_string(entry.path().join("device/model"))
            .map(trimmed)
-            .context(ErrorKind::StorageDevicesQuery)?;
+            .context("Error querying storage devices")?;
        if model == "CD-ROM" {
            continue;
@ -54,19 +53,19 @@ pub fn get_storage_devices(allow_non_removable: bool) -> Result<Vec<Device>, Err
            name: entry
                .path()
                .file_name()
-                .unwrap()
+                .expect("Could not get file name for dir entry /sys/block")
                .to_string_lossy()
                .into_owned(),
            model,
            vendor: fs::read_to_string(entry.path().join("device/vendor"))
                .map(trimmed)
-                .context(ErrorKind::StorageDevicesQuery)?,
+                .context("Error querying storage devices")?,
            size: Byte::from_bytes(
                fs::read_to_string(entry.path().join("size"))
-                    .context(ErrorKind::StorageDevicesQuery)?
+                    .context("Error querying storage devices")?
                    .trim()
                    .parse::<u128>()
-                    .unwrap()
+                    .context("Could not parse block size to unsigned integer (u128)")?
                    * 512,
            ),
        })
@ -81,7 +80,7 @@ mod tests {
    #[test]
    fn sanity() {
-        let devices = get_storage_devices(false).unwrap();
+        let devices = get_storage_devices(false).expect("No devices");
        println!("{:?}", devices);
    }
 }
--- a/src/storage/storage_device.rs
+++ b/src/storage/storage_device.rs
@ -1,7 +1,6 @@
 use super::markers::{BlockDevice, Origin};
 use super::partition::Partition;
-use crate::error::{Error, ErrorKind};
+use anyhow::{anyhow, Context};
 use failure::ResultExt;
 use log::debug;
 use std::fs::read_to_string;
 use std::marker::PhantomData;
@ -15,14 +14,16 @@ pub struct StorageDevice<'a> {
 }
 impl<'a> StorageDevice<'a> {
-    pub fn from_path(path: &'a Path, allow_non_removable: bool) -> Result<Self, Error> {
+    pub fn from_path(path: &'a Path, allow_non_removable: bool) -> anyhow::Result<Self> {
        debug!("path: {:?}", path);
-        let path = path.canonicalize().context(ErrorKind::DeviceQuery)?;
+        let path = path
            .canonicalize()
            .context("Error querying information about the block device")?;
        let device_name = path
            .file_name()
            .and_then(|s| s.to_str())
            .map(String::from)
-            .ok_or_else(|| Error::from(ErrorKind::InvalidDeviceName))?;
+            .ok_or_else(|| anyhow!("Invalid device name: {}", path.display()))?;
        debug!("real path: {:?}, device name: {:?}", path, device_name);
@ -35,7 +36,10 @@ impl<'a> StorageDevice<'a> {
        // If we only allow removable/loop devices, and the device is neither removable or a loop
        // device then throw a DangerousDevice error
        if !(allow_non_removable || _self.is_removable_device()? || _self.is_loop_device()) {
-            return Err(ErrorKind::DangerousDevice.into());
+            return Err(anyhow!(
                "The given block device is neither removable nor a loop device: {}",
                _self.name
            ));
        }
        Ok(_self)
@ -47,12 +51,13 @@ impl<'a> StorageDevice<'a> {
        path
    }
-    fn is_removable_device(&self) -> Result<bool, Error> {
+    fn is_removable_device(&self) -> anyhow::Result<bool> {
        let mut path = self.sys_path();
        path.push("removable");
        debug!("Reading: {:?}", path);
-        let result = read_to_string(&path).context(ErrorKind::DeviceQuery)?;
+        let result =
            read_to_string(&path).context("Error querying information about the block device")?;
        debug!("{:?} -> {}", path, result);
        Ok(result == "1\n")
@ -64,8 +69,15 @@ impl<'a> StorageDevice<'a> {
        path.exists()
    }
-    pub fn get_partition(&self, index: u8) -> Result<Partition, Error> {
+    pub fn get_partition(&self, index: u8) -> anyhow::Result<Partition> {
-        let name = if self.name.chars().rev().next().unwrap().is_digit(10) {
+        let name = if self
            .name
            .chars()
            .rev()
            .next()
            .expect("Storage device name is empty")
            .is_digit(10)
        {
            format!("{}p{}", self.name, index)
        } else {
            format!("{}{}", self.name, index)
@ -75,7 +87,7 @@ impl<'a> StorageDevice<'a> {
        debug!("Partition {} for {} is in {:?}", index, self.name, path);
        if !path.exists() {
-            return Err(ErrorKind::NoSuchPartition(index).into());
+            return Err(anyhow!("Partition {} does not exist", index));
        }
        Ok(Partition::new::<Self>(path))
    }
--- a/src/tool/chroot.rs
+++ b/src/tool/chroot.rs
@ -2,19 +2,18 @@ use super::mount;
 use super::Tool;
 use crate::args;
 use crate::constants::{BOOT_PARTITION_INDEX, ROOT_PARTITION_INDEX};
 use crate::error::{Error, ErrorKind};
 use crate::process::CommandExt;
 use crate::storage;
 use crate::storage::{is_encrypted_device, EncryptedDevice};
 use crate::storage::{BlockDevice, Filesystem, FilesystemType, LoopDevice};
 use anyhow::Context;
 use log::info;
 use failure::ResultExt;
 use tempfile::tempdir;
 /// Use arch-chroot to chroot to the given device
 /// Also handles encrypted root partitions (detected by checking for the LUKS magic header)
-pub fn chroot(command: args::ChrootCommand) -> Result<(), Error> {
+pub fn chroot(command: args::ChrootCommand) -> anyhow::Result<()> {
    let arch_chroot = Tool::find("arch-chroot")?;
    let cryptsetup;
@ -26,12 +25,12 @@ pub fn chroot(command: args::ChrootCommand) -> Result<(), Error> {
            Err(_) => {
                loop_device = Some(LoopDevice::create(&command.block_device)?);
                storage::StorageDevice::from_path(
-                    loop_device.as_ref().unwrap().path(),
+                    loop_device.as_ref().expect("loop device not found").path(),
                    command.allow_non_removable,
                )?
            }
        };
-    let mount_point = tempdir().context(ErrorKind::TmpDirError)?;
+    let mount_point = tempdir().context("Error creating a temporary directory")?;
    let boot_partition = storage_device.get_partition(BOOT_PARTITION_INDEX)?;
    let boot_filesystem = Filesystem::from_partition(&boot_partition, FilesystemType::Vfat);
@ -40,7 +39,7 @@ pub fn chroot(command: args::ChrootCommand) -> Result<(), Error> {
    let encrypted_root = if is_encrypted_device(&root_partition_base)? {
        cryptsetup = Some(Tool::find("cryptsetup")?);
        Some(EncryptedDevice::open(
-            cryptsetup.as_ref().unwrap(),
+            cryptsetup.as_ref().expect("cryptsetup not found"),
            &root_partition_base,
            "alma_root".into(),
        )?)
@ -61,7 +60,13 @@ pub fn chroot(command: args::ChrootCommand) -> Result<(), Error> {
        .execute()
        .arg(mount_point.path())
        .args(&command.command)
-        .run(ErrorKind::Interactive)?;
+        .run()
        .with_context(|| {
            format!(
                "Error running command in chroot: {}",
                command.command.join(" "),
            )
        })?;
    info!("Unmounting filesystems");
    mount_stack.umount()?;
--- a/src/tool/mod.rs
+++ b/src/tool/mod.rs
@ -6,8 +6,7 @@ pub use chroot::chroot;
 pub use mount::mount;
 pub use qemu::qemu;
-use crate::error::*;
+use anyhow::anyhow;
 use failure::ResultExt;
 use std::path::PathBuf;
 use std::process::Command;
 use which::which;
@ -18,10 +17,17 @@ pub struct Tool {
 }
 impl Tool {
-    pub fn find(name: &'static str) -> Result<Self, Error> {
+    pub fn find(name: &'static str) -> anyhow::Result<Self> {
-        Ok(Self {
+        // Note this conversion is only necessary until which releases their new version using
-            exec: which(name).context(ErrorKind::NoTool(name))?,
+        // thiserror instead of failure - then we can just use .with_context() on the thiserror
-        })
+        // Error
        // Commit pending release:
        // BLOCKED: https://github.com/harryfei/which-rs/commit/e6e839c4f6cdf8d3e33ec7eafdd50d34472740ea
        let which = match which(name) {
            Ok(x) => Ok(x),
            Err(_) => Err(anyhow!("Could not find tool: {}", name)),
        }?;
        Ok(Self { exec: which })
    }
    pub fn execute(&self) -> Command {
--- a/src/tool/mount.rs
+++ b/src/tool/mount.rs
@ -1,6 +1,5 @@
 use crate::error::{Error, ErrorKind};
 use crate::storage::{Filesystem, MountStack};
-use failure::ResultExt;
+use anyhow::Context;
 use log::{debug, info};
 use std::fs;
 use std::path::Path;
@ -12,7 +11,7 @@ pub fn mount<'a>(
    mount_path: &Path,
    boot_filesystem: &'a Filesystem,
    root_filesystem: &'a Filesystem,
-) -> Result<MountStack<'a>, Error> {
+) -> anyhow::Result<MountStack<'a>> {
    let mut mount_stack = MountStack::new();
    debug!(
        "Root partition: {}",
@ -22,16 +21,16 @@ pub fn mount<'a>(
    info!("Mounting filesystems to {}", mount_path.display());
    mount_stack
        .mount(&root_filesystem, mount_path.into(), None)
-        .context(ErrorKind::Mounting)?;
+        .with_context(|| format!("Error mounting filesystem to {}", mount_path.display()))?;
    let boot_point = mount_path.join("boot");
    if !boot_point.exists() {
-        fs::create_dir(&boot_point).context(ErrorKind::CreateBoot)?;
+        fs::create_dir(&boot_point).context("Error creating the boot directory")?;
    }
    mount_stack
        .mount(&boot_filesystem, boot_point, None)
-        .context(ErrorKind::Mounting)?;
+        .context("Error mounting the boot point")?;
    Ok(mount_stack)
 }
--- a/src/tool/qemu.rs
+++ b/src/tool/qemu.rs
@ -1,15 +1,14 @@
 use super::Tool;
 use crate::args;
-use crate::error;
+use anyhow::Context;
 use log::debug;
 use failure::ResultExt;
 use std::os::unix::process::CommandExt as UnixCommandExt;
 use std::path::PathBuf;
 /// Loads given block device in qemu
 /// Uses kvm if it is enabled
-pub fn qemu(command: args::QemuCommand) -> Result<(), error::Error> {
+pub fn qemu(command: args::QemuCommand) -> anyhow::Result<()> {
    let qemu = Tool::find("qemu-system-x86_64")?;
    let mut run = qemu.execute();
@ -39,5 +38,5 @@ pub fn qemu(command: args::QemuCommand) -> Result<(), error::Error> {
    let err = run.exec();
-    Err(err).context(error::ErrorKind::Qemu)?
+    Err(err).context("Failed launching Qemu")?
 }