Move the package manager step to the beginning (fixes #19)

README.md

@@ -14,12 +14,17 @@ Other systems users can either use `cargo install` or use the compiled binaries
 ## Usage
 Just invoke `topgrade`. It will invoke the following steps:
 
+* Invoke the system package manager:
+  * *Arch*: Invoke [yay](https://github.com/Jguer/yay) or fall back to pacman
+  * *CentOS/RHEL*: Invoke `yum upgrade`
+  * *Fedora* - Invoke `dnf upgrade`
+  * *Debian/Ubuntu*: Invoke `apt update && apt dist-upgrade`
+  * *macOS*: Invoke `brew update && brew upgrade`
 * Check if the following paths are tracked by Git. If so, pull them:
   * ~/.emacs.d (Should work whether you use [Spacemacs](http://spacemacs.org/) or a custom configuration)
   * ~/.zshrc
   * [~/.oh-my-zsh](https://github.com/robbyrussell/oh-my-zsh)
   * ~/.tmux
-
 * *Unix*: Invoke [zplug](https://github.com/zplug/zplug) update
 * *Unix*: Upgrade tmux plugins with [TPM](https://github.com/tmux-plugins/tpm)
 * Invoke Cargo [install-update](https://github.com/nabijaczleweli/cargo-update)
@@ -30,12 +35,7 @@ Just invoke `topgrade`. It will invoke the following steps:
   * [Plug](https://github.com/junegunn/vim-plug)
 * Upgrade NPM globally installed packages
 * Upgrade Atom packages
-* *Linux*: Invoke the system package manager:
-  * *Arch*: Invoke [yay](https://github.com/Jguer/yay) or fall back to pacman
-  * *CentOS/RHEL*: Invoke `yum upgrade`
-  * *Fedora* - Invoke `dnf upgrade`
-  * *Debian/Ubuntu*: Invoke `apt update && apt dist-upgrade`
 * *Linux*: Invoke [fwupdmgr](https://github.com/hughsie/fwupd) to show firmware upgrade. (View only. No upgrades will actually be performed)
-* *Linux*: Run [needrestart](https://github.com/liske/needrestart)
-* *macOS*: Upgrade [Homebrew](https://brew.sh/) packages
-* *macOS*: Upgrade App Store applications
+* Final stage
+  * *Linux*: Run [needrestart](https://github.com/liske/needrestart)
+  * *macOS*: Upgrade App Store applications

src/main.rs

@@ -84,6 +84,39 @@ fn main() -> Result<(), Error> {
     let mut reports = Report::new();
     let config = Config::read()?;
 
+    let sudo = if cfg!(target_os = "linux") {
+        which("sudo").ok()
+    } else {
+        None
+    };
+
+    if cfg!(target_os = "linux") {
+        terminal.print_separator("System update");
+        match linux::Distribution::detect() {
+            Ok(distribution) => {
+                match distribution {
+                    linux::Distribution::Arch => upgrade_arch_linux(&sudo, &terminal),
+                    linux::Distribution::CentOS => upgrade_redhat(&sudo, &terminal),
+                    linux::Distribution::Fedora => upgrade_fedora(&sudo, &terminal),
+                    linux::Distribution::Ubuntu | linux::Distribution::Debian => {
+                        upgrade_debian(&sudo, &terminal)
+                    }
+                }.report("System upgrade", &mut reports);
+            }
+
+            Err(e) => {
+                println!("Error detecting current distribution: {}", e);
+            }
+        }
+    }
+
+    if cfg!(target_os = "macos") {
+        if let Ok(brew) = which("brew") {
+            terminal.print_separator("Homebrew");
+            run_homebrew(&brew).report("Homebrew", &mut reports);
+        }
+    }
+
     git_repos.insert(home_path(".emacs.d"));
 
     if cfg!(unix) {
@@ -163,32 +196,12 @@ fn main() -> Result<(), Error> {
     }
 
     if cfg!(target_os = "linux") {
-        let sudo = which("sudo");
-
-        terminal.print_separator("System update");
-        match linux::Distribution::detect() {
-            Ok(distribution) => {
-                match distribution {
-                    linux::Distribution::Arch => upgrade_arch_linux(&sudo, &terminal),
-                    linux::Distribution::CentOS => upgrade_redhat(&sudo, &terminal),
-                    linux::Distribution::Fedora => upgrade_fedora(&sudo, &terminal),
-                    linux::Distribution::Ubuntu | linux::Distribution::Debian => {
-                        upgrade_debian(&sudo, &terminal)
-                    }
-                }.report("System upgrade", &mut reports);
-            }
-
-            Err(e) => {
-                println!("Error detecting current distribution: {}", e);
-            }
-        }
-
         if let Ok(fwupdmgr) = which("fwupdmgr") {
             terminal.print_separator("Firmware upgrades");
             run_fwupdmgr(&fwupdmgr).report("Firmware upgrade", &mut reports);
         }
 
-        if let Ok(sudo) = &sudo {
+        if let Some(sudo) = &sudo {
             if let Ok(_) = which("needrestart") {
                 terminal.print_separator("Check for needed restarts");
                 run_needrestart(&sudo).report("Restarts", &mut reports);
@@ -197,13 +210,8 @@ fn main() -> Result<(), Error> {
     }
 
     if cfg!(target_os = "macos") {
-        if let Ok(brew) = which("brew") {
-            terminal.print_separator("Homebrew");
-            run_homebrew(&brew).report("Homebrew", &mut reports);
-        }
-
-        terminal.print_separator("System update");
-        upgrade_macos().report("System upgrade", &mut reports);;
+        terminal.print_separator("App Store");
+        upgrade_macos().report("App Store", &mut reports);;
     }
 
     if let Some(commands) = config.commands() {

src/steps.rs

@@ -144,13 +144,13 @@ pub fn run_homebrew(homebrew: &PathBuf) -> Result<(), failure::Error> {
 }
 
 pub fn upgrade_arch_linux(
-    sudo: &Result<PathBuf, which::Error>,
+    sudo: &Option<PathBuf>,
     terminal: &Terminal,
 ) -> Result<(), failure::Error> {
     if let Ok(yay) = which("yay") {
         Command::new(yay).spawn()?.wait()?.check()?;
     } else {
-        if let Ok(sudo) = &sudo {
+        if let Some(sudo) = &sudo {
             Command::new(&sudo)
                 .args(&["pacman", "-Syu"])
                 .spawn()?
@@ -164,11 +164,8 @@ pub fn upgrade_arch_linux(
     Ok(())
 }
 
-pub fn upgrade_redhat(
-    sudo: &Result<PathBuf, which::Error>,
-    terminal: &Terminal,
-) -> Result<(), failure::Error> {
-    if let Ok(sudo) = &sudo {
+pub fn upgrade_redhat(sudo: &Option<PathBuf>, terminal: &Terminal) -> Result<(), failure::Error> {
+    if let Some(sudo) = &sudo {
         Command::new(&sudo)
             .args(&["yum", "upgrade"])
             .spawn()?
@@ -181,11 +178,8 @@ pub fn upgrade_redhat(
     Ok(())
 }
 
-pub fn upgrade_fedora(
-    sudo: &Result<PathBuf, which::Error>,
-    terminal: &Terminal,
-) -> Result<(), failure::Error> {
-    if let Ok(sudo) = &sudo {
+pub fn upgrade_fedora(sudo: &Option<PathBuf>, terminal: &Terminal) -> Result<(), failure::Error> {
+    if let Some(sudo) = &sudo {
         Command::new(&sudo)
             .args(&["dnf", "upgrade"])
             .spawn()?
@@ -198,11 +192,8 @@ pub fn upgrade_fedora(
     Ok(())
 }
 
-pub fn upgrade_debian(
-    sudo: &Result<PathBuf, which::Error>,
-    terminal: &Terminal,
-) -> Result<(), failure::Error> {
-    if let Ok(sudo) = &sudo {
+pub fn upgrade_debian(sudo: &Option<PathBuf>, terminal: &Terminal) -> Result<(), failure::Error> {
+    if let Some(sudo) = &sudo {
         Command::new(&sudo)
             .args(&["apt", "update"])
             .spawn()?