chore: release v12.0.1 (#510)

* chore: bump ci toolchain and MSRV

* fix clippy on macOS

.github/workflows/check-and-lint.yaml

@@ -7,7 +7,7 @@ on:
 name: CI
 
 env:
-  RUST_VER: '1.68.0'
+  RUST_VER: '1.71.0'
   CROSS_VER: '0.2.5'
   CARGO_NET_RETRY: 3
 

.github/workflows/code-coverage.yml

@@ -57,10 +57,3 @@ jobs:
           # token: ${{ secrets.CODECOV_TOKEN }}
           files: ./lcov.info
           fail_ci_if_error: true
-      - name: Test creation of config file
-        run: |
-          CONFIG_PATH=~/.config/topgrade.toml;
-          if [ -f "$CONFIG_PATH" ]; then rm $CONFIG_PATH; fi
-          cargo build; 
-          ./target/debug/topgrade --dry-run --only system;
-          stat $CONFIG_PATH;

.github/workflows/crates-publish.yml

@@ -4,7 +4,7 @@ on:
   #   types:
   #     - completed
   release:
-    types: [published, edited]
+    types: [published]
 
 name: Publish to crates.io on release
 

.github/workflows/test-config-creation.yml

@@ -0,0 +1,21 @@
+name: Test Configuration File Creation
+
+on:
+  pull_request:
+
+env:
+  CARGO_TERM_COLOR: always
+
+
+jobs:
+  TestConfig:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - run: |
+          CONFIG_PATH=~/.config/topgrade.toml;
+          if [ -f "$CONFIG_PATH" ]; then rm $CONFIG_PATH; fi
+          cargo build; 
+          ./target/debug/topgrade --dry-run --only system;
+          stat $CONFIG_PATH;

.github/workflows/update_pypi.yml

@@ -0,0 +1,99 @@
+name: Update PyPi
+
+on:
+  release:
+    types: [published]
+
+permissions:
+  contents: read
+
+jobs:
+  linux:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        target: [x86_64, x86, aarch64]
+    steps:
+      - uses: actions/checkout@v3
+      - name: Build wheels
+        uses: PyO3/maturin-action@v1
+        with:
+          target: ${{ matrix.target }}
+          args: --release --out dist
+          sccache: 'true'
+          manylinux: auto
+      - name: Upload wheels
+        uses: actions/upload-artifact@v3
+        with:
+          name: wheels
+          path: dist
+
+  windows:
+    runs-on: windows-latest
+    strategy:
+      matrix:
+        target: [x64, x86]
+    steps:
+      - uses: actions/checkout@v3
+      - name: Build wheels
+        uses: PyO3/maturin-action@v1
+        with:
+          target: ${{ matrix.target }}
+          args: --release --out dist
+          sccache: 'true'
+      - name: Upload wheels
+        uses: actions/upload-artifact@v3
+        with:
+          name: wheels
+          path: dist
+
+  macos:
+    runs-on: macos-latest
+    strategy:
+      matrix:
+        target: [x86_64, aarch64]
+    steps:
+      - uses: actions/checkout@v3
+      - name: Build wheels
+        uses: PyO3/maturin-action@v1
+        with:
+          target: ${{ matrix.target }}
+          args: --release --out dist
+          sccache: 'true'
+      - name: Upload wheels
+        uses: actions/upload-artifact@v3
+        with:
+          name: wheels
+          path: dist
+
+  sdist:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Build sdist
+        uses: PyO3/maturin-action@v1
+        with:
+          command: sdist
+          args: --out dist
+      - name: Upload sdist
+        uses: actions/upload-artifact@v3
+        with:
+          name: wheels
+          path: dist
+
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+    if: "startsWith(github.ref, 'refs/tags/')"
+    needs: [linux, windows, macos, sdist]
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          name: wheels
+      - name: Publish to PyPI
+        uses: PyO3/maturin-action@v1
+        env:
+          MATURIN_PYPI_TOKEN: ${{ secrets.PYPI_API_TOKEN }}
+        with:
+          command: upload
+          args: --skip-existing *

CONTRIBUTING.md

@@ -1,16 +1,19 @@
 ## Contributing to `topgrade`
 
-Thank you for your interest in contributing to `topgrade`! We welcome and encourage
+Thank you for your interest in contributing to `topgrade`! 
-contributions of all kinds, such as:
+We welcome and encourage contributions of all kinds, such as:
 
 1. Issue reports or feature requests
 2. Documentation improvements
 3. Code (PR or PR Review)
 
+Please follow the [Karma Runner guidelines](http://karma-runner.github.io/6.2/dev/git-commit-msg.html)
+for commit messages.
+
 ## Adding a new `step`
 
-In `topgrade`'s term, package manager is called `step`. To add a new `step` to
+In `topgrade`'s term, package manager is called `step`.
-`topgrade`: 
+To add a new `step` to `topgrade`: 
 
 1. Add a new variant to 
    [`enum Step`](https://github.com/topgrade-rs/topgrade/blob/cb7adc8ced8a77addf2cb051d18bba9f202ab866/src/config.rs#L100)

Cargo.lock

@@ -624,7 +624,7 @@ checksum = "5cbc844cecaee9d4443931972e1289c8ff485cb4cc2767cb03ca139ed6885153"
 dependencies = [
  "cfg-if",
  "libc",
- "redox_syscall",
+ "redox_syscall 0.2.16",
  "windows-sys 0.48.0",
 ]
 
@@ -1495,6 +1495,15 @@ dependencies = [
  "bitflags",
 ]
 
+[[package]]
+name = "redox_syscall"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "567664f262709473930a4bf9e51bf2ebf3348f2e748ccc50dea20646858f8f29"
+dependencies = [
+ "bitflags",
+]
+
 [[package]]
 name = "redox_users"
 version = "0.4.3"
@@ -1502,7 +1511,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b033d837a7cf162d7993aded9304e30a83213c648b6e389db233191f891e5c2b"
 dependencies = [
  "getrandom",
- "redox_syscall",
+ "redox_syscall 0.2.16",
  "thiserror",
 ]
 
@@ -1541,15 +1550,6 @@ version = "0.6.29"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f162c6dd7b008981e4d40210aca20b4bd0f9b60ca9271061b07f78537722f2e1"
 
-[[package]]
-name = "remove_dir_all"
-version = "0.5.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3acd125665422973a33ac9d3dd2df85edad0f4ae9b00dafb1a05e43a9f5ef8e7"
-dependencies = [
- "winapi",
-]
-
 [[package]]
 name = "reqwest"
 version = "0.11.18"
@@ -1947,16 +1947,16 @@ dependencies = [
 
 [[package]]
 name = "tempfile"
-version = "3.2.0"
+version = "3.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dac1c663cfc93810f88aed9b8941d48cabf856a1b111c29a40439018d870eb22"
+checksum = "31c0432476357e58790aaa47a8efb0c5138f137343f3b5f23bd36a27e3b0a6d6"
 dependencies = [
+ "autocfg",
  "cfg-if",
- "libc",
+ "fastrand",
- "rand",
+ "redox_syscall 0.3.5",
- "redox_syscall",
+ "rustix",
- "remove_dir_all",
+ "windows-sys 0.48.0",
- "winapi",
 ]
 
 [[package]]
@@ -2126,7 +2126,7 @@ dependencies = [
 
 [[package]]
 name = "topgrade"
-version = "12.0.0"
+version = "12.0.1"
 dependencies = [
  "cfg-if",
  "chrono",

Cargo.toml

@@ -5,7 +5,7 @@ categories = ["os"]
 keywords = ["upgrade", "update"]
 license = "GPL-3.0"
 repository = "https://github.com/topgrade-rs/topgrade"
-version = "12.0.0"
+version = "12.0.1"
 authors = ["Roey Darwish Dror <roey.ghost@gmail.com>", "Thomas Schönauer <t.schoenauer@hgs-wt.at>"]
 exclude = ["doc/screenshot.gif"]
 edition = "2021"
@@ -37,7 +37,7 @@ chrono = "~0.4"
 glob = "~0.3"
 strum = { version = "~0.24", features = ["derive"] }
 thiserror = "~1.0"
-tempfile = "~3.2"
+tempfile = "~3.6"
 cfg-if = "~1.0"
 tokio = { version = "~1.18", features = ["process", "rt-multi-thread"] }
 futures = "~0.3"

README.md

@@ -34,11 +34,13 @@ To remedy this, **Topgrade** detects which tools you use and runs the appropriat
 - Void Linux: [XBPS](https://voidlinux.org/packages/?arch=x86_64&q=topgrade)
 - macOS: [Homebrew](https://formulae.brew.sh/formula/topgrade) or [MacPorts](https://ports.macports.org/port/topgrade/)
 - Windows: [Scoop](https://github.com/ScoopInstaller/Main/blob/master/bucket/topgrade.json)
+- PyPi: [pip](https://pypi.org/project/topgrade/)
 
 Other systems users can either use `cargo install` or the compiled binaries from the release page.
 The compiled binaries contain a self-upgrading feature.
 
-Topgrade requires Rust 1.60 or above.
+> Currently, Topgrade requires Rust 1.65 or above. In general, Topgrade tracks 
+> the latest stable toolchain.
 
 ## Usage
 

config.example.toml

@@ -1,6 +1,6 @@
 # Include any additional configuration file(s)
 # [include] sections are processed in the order you write them
-# Files in $CONFIG_DIR/topgrade/topgrade.d/ are automatically included at the beginning of this file
+# Files in $CONFIG_DIR/topgrade.d/ are automatically included before this file
 [include]
 #paths = ["/etc/topgrade.toml"]
 
@@ -23,8 +23,8 @@
 # Sudo command to be used
 #sudo_command = "sudo"
 
-# Run `sudo -v` to cache credentials at the start of the run; this avoids a
+# Run `sudo -v` to cache credentials at the start of the run
-# blocking password prompt in the middle of a possibly-unattended run.
+# This avoids a blocking password prompt in the middle of an unattended run
 #pre_sudo = false
 
 # Run inside tmux
@@ -33,7 +33,7 @@
 # List of remote machines with Topgrade installed on them
 #remote_topgrades = ["toothless", "pi", "parnas"]
 
-# Arguments to pass SSH when upgrading remote systems
+# Arguments to pass to SSH when upgrading remote systems
 #ssh_arguments = "-o ConnectTimeout=2"
 
 # Path to Topgrade executable on remote machines
@@ -57,32 +57,28 @@
 # Whether to self update (this is ignored if the binary has been built without self update support, available also via setting the environment variable TOPGRADE_NO_SELF_UPGRADE)
 #no_self_update = true
 
-[git]
-#max_concurrency = 5
-# Additional git repositories to pull
-#repos = [
-#    "~/src/*/",
-#    "~/.config/something"
-#]
-
-# Don't pull the predefined git repos
-#pull_predefined = false
-
-# Arguments to pass Git when pulling Repositories
-#arguments = "--rebase --autostash"
-
-[composer]
-#self_update = true
-
 # Commands to run before anything
 [pre_commands]
 #"Emacs Snapshot" = "rm -rf ~/.emacs.d/elpa.bak && cp -rl ~/.emacs.d/elpa ~/.emacs.d/elpa.bak"
 
+# Commands to run after anything
+[post_commands]
+#"Emacs Snapshot" = "rm -rf ~/.emacs.d/elpa.bak && cp -rl ~/.emacs.d/elpa ~/.emacs.d/elpa.bak"
+
 # Custom commands
 [commands]
 #"Python Environment" = "~/dev/.env/bin/pip install -i https://pypi.python.org/simple -U --upgrade-strategy eager jupyter"
 #"Custom command using interactive shell (unix)" = "-i vim_upgrade"
 
+[python]
+#enable_pip_review = true                         ###disabled by default
+#enable_pip_review_local = true                   ###disabled by default
+#enable_pipupgrade = true                         ###disabled by default
+#pipupgrade_arguments = "-y -u --pip-path pip"    ###disabled by default
+
+[composer]
+#self_update = true
+
 [brew]
 #greedy_cask = true
 #autoremove = true
@@ -109,11 +105,19 @@
 #rpm_ostree = false
 #nix_arguments = "--flake"
 
-[python]
+[git]
-#enable_pip_review = true                         ###disabled by default
+#max_concurrency = 5
-#enable_pip_review_local = true                   ###disabled by default
+# Additional git repositories to pull
-#enable_pipupgrade = true                         ###disabled by default
+#repos = [
-#pipupgrade_arguments = "-y -u --pip-path pip"    ###disabled by default
+#    "~/src/*/",
+#    "~/.config/something"
+#]
+
+# Don't pull the predefined git repos
+#pull_predefined = false
+
+# Arguments to pass Git when pulling Repositories
+#arguments = "--rebase --autostash"
 
 [windows]
 # Manually select Windows updates
@@ -131,10 +135,28 @@
 # Use sudo if the NPM directory isn't owned by the current user
 #use_sudo = true
 
+[yarn]
+# Run `yarn global upgrade` with `sudo`
+#use_sudo = true
+
+[vim]
+# For `vim-plug`, execute `PlugUpdate!` instead of `PlugUpdate`
+#force_plug_update = true
+
 [firmware]
 # Offer to update firmware; if false just check for and display available updates
 #upgrade = true
 
+[vagrant]
+# Vagrant directories
+#directories = []
+
+# power on vagrant boxes if needed
+#power_on = true
+
+# Always suspend vagrant boxes instead of powering off
+#always_suspend = true
+
 [flatpak]
 # Use sudo for updating the system-wide installation
 #use_sudo = true

pyproject.toml

@@ -0,0 +1,16 @@
+[build-system]
+requires = ["maturin>=1.0,<2.0"]
+build-backend = "maturin"
+
+[project]
+name = "topgrade"
+requires-python = ">=3.7"
+classifiers = [
+    "Programming Language :: Rust",
+    "Programming Language :: Python :: Implementation :: CPython",
+    "Programming Language :: Python :: Implementation :: PyPy",
+]
+
+
+[tool.maturin]
+bindings = "bin"

src/config.rs

@@ -370,6 +370,8 @@ pub struct Vim {
 pub struct Misc {
     pre_sudo: Option<bool>,
 
+    sudo_command: Option<SudoKind>,
+
     #[merge(strategy = crate::utils::merge_strategies::vec_prepend_opt)]
     git_repos: Option<Vec<String>>,
 
@@ -440,8 +442,6 @@ pub struct ConfigFile {
     #[merge(strategy = crate::utils::merge_strategies::inner_merge_opt)]
     misc: Option<Misc>,
 
-    sudo_command: Option<SudoKind>,
-
     #[merge(strategy = crate::utils::merge_strategies::commands_merge_opt)]
     pre_commands: Option<Commands>,
 
@@ -1389,7 +1389,7 @@ impl Config {
     }
 
     pub fn sudo_command(&self) -> Option<SudoKind> {
-        self.config_file.sudo_command
+        self.config_file.misc.as_ref().and_then(|misc| misc.sudo_command)
     }
 
     /// If `true`, `sudo` should be called after `pre_commands` in order to elevate at the

src/execution_context.rs

@@ -5,6 +5,7 @@ use crate::sudo::Sudo;
 use crate::utils::{require_option, REQUIRE_SUDO};
 use crate::{config::Config, executor::Executor};
 use color_eyre::eyre::Result;
+use std::env::var;
 use std::path::Path;
 use std::sync::Mutex;
 
@@ -17,16 +18,20 @@ pub struct ExecutionContext<'a> {
     /// This is used in `./steps/remote/ssh.rs`, where we want to run `topgrade` in a new
     /// tmux window for each remote.
     tmux_session: Mutex<Option<String>>,
+    /// True if topgrade is running under ssh.
+    under_ssh: bool,
 }
 
 impl<'a> ExecutionContext<'a> {
     pub fn new(run_type: RunType, sudo: Option<Sudo>, git: &'a Git, config: &'a Config) -> Self {
+        let under_ssh = var("SSH_CLIENT").is_ok() || var("SSH_TTY").is_ok();
         Self {
             run_type,
             sudo,
             git,
             config,
             tmux_session: Mutex::new(None),
+            under_ssh,
         }
     }
 
@@ -51,6 +56,10 @@ impl<'a> ExecutionContext<'a> {
         self.config
     }
 
+    pub fn under_ssh(&self) -> bool {
+        self.under_ssh
+    }
+
     pub fn set_tmux_session(&self, session_name: String) {
         self.tmux_session.lock().unwrap().replace(session_name);
     }

src/steps/emacs.rs

@@ -1,4 +1,4 @@
-#[cfg(any(windows))]
+#[cfg(windows)]
 use std::env;
 use std::path::{Path, PathBuf};
 

src/steps/generic.rs

@@ -339,7 +339,7 @@ pub fn run_conda_update(ctx: &ExecutionContext) -> Result<()> {
     print_separator("Conda");
 
     let mut command = ctx.run_type().execute(conda);
-    command.args(["update", "--all"]);
+    command.args(["update", "--all", "-n", "base"]);
     if ctx.config().yes(Step::Conda) {
         command.arg("--yes");
     }
@@ -360,7 +360,7 @@ pub fn run_mamba_update(ctx: &ExecutionContext) -> Result<()> {
     print_separator("Mamba");
 
     let mut command = ctx.run_type().execute(mamba);
-    command.args(["update", "--all"]);
+    command.args(["update", "--all", "-n", "base"]);
     if ctx.config().yes(Step::Mamba) {
         command.arg("--yes");
     }
@@ -720,7 +720,8 @@ pub fn bin_update(ctx: &ExecutionContext) -> Result<()> {
 }
 
 pub fn spicetify_upgrade(ctx: &ExecutionContext) -> Result<()> {
-    let spicetify = require("spicetify")?;
+    // As of 04-07-2023 NixOS packages Spicetify with the `spicetify-cli` binary name
+    let spicetify = require("spicetify").or(require("spicetify-cli"))?;
 
     print_separator("Spicetify");
     ctx.run_type().execute(spicetify).arg("upgrade").status_checked()

src/steps/os/dragonfly.rs

@@ -10,6 +10,7 @@ pub fn upgrade_packages(ctx: &ExecutionContext) -> Result<()> {
     print_separator("DragonFly BSD Packages");
     ctx.execute(sudo)
         .args(["/usr/local/sbin/pkg", "upgrade"])
+        .arg(if ctx.config().yes(Step::System) { "-y" } else { "" })
         .status_checked()
 }
 

src/steps/os/linux.rs

@@ -256,6 +256,7 @@ fn upgrade_suse(ctx: &ExecutionContext) -> Result<()> {
         } else {
             "update"
         })
+        .arg(if ctx.config().yes(Step::System) { "-y" } else { "" })
         .status_checked()?;
 
     Ok(())
@@ -272,6 +273,7 @@ fn upgrade_opensuse_tumbleweed(ctx: &ExecutionContext) -> Result<()> {
         .execute(sudo)
         .arg("zypper")
         .arg("dist-upgrade")
+        .arg(if ctx.config().yes(Step::System) { "-y" } else { "" })
         .status_checked()?;
 
     Ok(())
@@ -281,7 +283,9 @@ fn upgrade_suse_micro(ctx: &ExecutionContext) -> Result<()> {
     let sudo = require_option(ctx.sudo().as_ref(), REQUIRE_SUDO.to_string())?;
     ctx.run_type()
         .execute(sudo)
-        .args(["transactional-update", "dup"])
+        .arg("transactional-update")
+        .arg(if ctx.config().yes(Step::System) { "-n" } else { "" })
+        .arg("dup")
         .status_checked()?;
 
     Ok(())
@@ -325,6 +329,7 @@ fn upgrade_pclinuxos(ctx: &ExecutionContext) -> Result<()> {
         .execute(sudo)
         .arg(&which("apt-get").unwrap())
         .arg("dist-upgrade")
+        .arg(if ctx.config().yes(Step::System) { "-y" } else { "" })
         .status_checked()?;
 
     Ok(())
@@ -499,7 +504,9 @@ fn upgrade_solus(ctx: &ExecutionContext) -> Result<()> {
     let sudo = require_option(ctx.sudo().as_ref(), REQUIRE_SUDO.to_string())?;
     ctx.run_type()
         .execute(sudo)
-        .args(["eopkg", "upgrade"])
+        .arg("eopkg")
+        .arg(if ctx.config().yes(Step::System) { "-y" } else { "" })
+        .arg("upgrade")
         .status_checked()?;
 
     Ok(())
@@ -542,6 +549,11 @@ pub fn run_pacdef(ctx: &ExecutionContext) -> Result<()> {
         ctx.run_type()
             .execute(&pacdef)
             .args(["package", "sync"])
+            .arg(if ctx.config().yes(Step::System) {
+                "--noconfirm"
+            } else {
+                ""
+            })
             .status_checked()?;
 
         println!();
@@ -550,7 +562,15 @@ pub fn run_pacdef(ctx: &ExecutionContext) -> Result<()> {
             .args(["package", "review"])
             .status_checked()?;
     } else {
-        ctx.run_type().execute(&pacdef).arg("sync").status_checked()?;
+        ctx.run_type()
+            .execute(&pacdef)
+            .arg("sync")
+            .arg(if ctx.config().yes(Step::System) {
+                "--noconfirm"
+            } else {
+                ""
+            })
+            .status_checked()?;
 
         println!();
         ctx.run_type().execute(&pacdef).arg("review").status_checked()?;
@@ -599,6 +619,11 @@ fn upgrade_clearlinux(ctx: &ExecutionContext) -> Result<()> {
     ctx.run_type()
         .execute(sudo)
         .args(["swupd", "update"])
+        .arg(if ctx.config().yes(Step::System) {
+            "--assume=yes"
+        } else {
+            ""
+        })
         .status_checked()?;
 
     Ok(())
@@ -1014,4 +1039,9 @@ mod tests {
     fn test_vanilla() {
         test_template(include_str!("os_release/vanilla"), Distribution::Vanilla);
     }
+
+    #[test]
+    fn test_solus() {
+        test_template(include_str!("os_release/solus"), Distribution::Solus);
+    }
 }

src/steps/os/os_release/solus

@@ -0,0 +1,11 @@
+NAME="Solus"
+VERSION="4.4"
+ID="solus"
+VERSION_CODENAME=harmony
+VERSION_ID="4.4"
+PRETTY_NAME="Solus 4.4 Harmony"
+ANSI_COLOR="1;34"
+HOME_URL="https://getsol.us"
+SUPPORT_URL="https://help.getsol.us/docs/user/contributing/getting-involved"
+BUG_REPORT_URL="https://dev.getsol.us/"
+LOGO="distributor-logo-solus"

src/steps/os/unix.rs

@@ -155,7 +155,7 @@ pub fn run_oh_my_bash(ctx: &ExecutionContext) -> Result<()> {
     print_separator("oh-my-bash");
 
     let mut update_script = oh_my_bash;
-    update_script.push_str("tools/upgrade.sh");
+    update_script.push_str("/tools/upgrade.sh");
 
     ctx.run_type().execute("bash").arg(update_script).status_checked()
 }
@@ -383,7 +383,7 @@ pub fn run_nix(ctx: &ExecutionContext) -> Result<()> {
 
     #[cfg(target_os = "macos")]
     {
-        if let Ok(..) = require("darwin-rebuild") {
+        if require("darwin-rebuild").is_ok() {
             return Err(SkipStep(String::from(
                 "Nix-darwin on macOS must be upgraded via darwin-rebuild switch",
             ))

src/steps/toolbx.rs

@@ -52,6 +52,8 @@ pub fn run_toolbx(ctx: &ExecutionContext) -> Result<()> {
             topgrade_path,
             "--only",
             "system",
+            "--no-self-update",
+            "--skip-notify",
         ];
         if ctx.config().yes(Step::Toolbx) {
             args.push("--yes");

src/steps/zsh.rs

@@ -165,6 +165,28 @@ pub fn run_zim(ctx: &ExecutionContext) -> Result<()> {
 
 pub fn run_oh_my_zsh(ctx: &ExecutionContext) -> Result<()> {
     require("zsh")?;
+
+    // When updating `oh-my-zsh` on a remote machine through topgrade, the
+    // following processes will be created:
+    //
+    // SSH -> ZSH -> ZSH ($SHELL) -> topgrade -> ZSH
+    //
+    // The first ZSH process, won't source zshrc (as it is a login shell),
+    // and thus it won't have the ZSH environment variable, as a result, the
+    // children processes won't get it either, so we source the zshrc and set
+    // the ZSH variable for topgrade here.
+    if ctx.under_ssh() {
+        let zshrc_path = zshrc().require()?;
+        let output = Command::new("zsh")
+            .args([
+                "-c",
+                // ` > /dev/null` is used in case the user's zshrc will have some stdout output.
+                format!("source {} > /dev/null && echo $ZSH", zshrc_path.display()).as_str(),
+            ])
+            .output_checked_utf8()?;
+        env::set_var("ZSH", output.stdout.trim());
+    }
+
     let oh_my_zsh = env::var("ZSH")
         .map(PathBuf::from)
         // default to `~/.oh-my-zsh`