feat: skip breaking changes notification with env var (#659)

* feat: skip breaking changes notification with env var

* ci: apply that env in ci

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

@@ -17,5 +17,5 @@ jobs:
           CONFIG_PATH=~/.config/topgrade.toml;
           if [ -f "$CONFIG_PATH" ]; then rm $CONFIG_PATH; fi
           cargo build; 
-          ./target/debug/topgrade --dry-run --only system;
+          TOPGRADE_SKIP_BRKC_NOTIFY=true ./target/debug/topgrade --dry-run --only system;
           stat $CONFIG_PATH;

src/breaking_changes.rs

@@ -12,6 +12,7 @@ use crate::XDG_DIRS;
 use color_eyre::eyre::Result;
 use etcetera::base_strategy::BaseStrategy;
 use std::{
+    env::var,
     fs::{read_to_string, OpenOptions},
     io::Write,
     path::PathBuf,
@@ -89,6 +90,16 @@ fn keep_file_path() -> PathBuf {
     data_dir().join(keep_file)
 }
 
+/// If environment variable `TOPGRADE_SKIP_BRKC_NOTIFY` is set to `true`, then
+/// we won't notify the user of the breaking changes.
+pub(crate) fn should_skip() -> bool {
+    if let Ok(var) = var("TOPGRADE_SKIP_BRKC_NOTIFY") {
+        return var.as_str() == "true";
+    }
+
+    false
+}
+
 /// True if this is the first execution of a major release.
 pub(crate) fn first_run_of_major_release() -> Result<bool> {
     let version = VERSION_STR.parse::<Version>().expect("should be a valid version");

src/main.rs

@@ -6,7 +6,7 @@ use std::path::PathBuf;
 use std::process::exit;
 use std::time::Duration;
 
-use crate::breaking_changes::{first_run_of_major_release, print_breaking_changes, write_keep_file};
+use crate::breaking_changes::{first_run_of_major_release, print_breaking_changes, should_skip, write_keep_file};
 use clap::CommandFactory;
 use clap::{crate_version, Parser};
 use color_eyre::eyre::Context;
@@ -135,9 +135,13 @@ fn run() -> Result<()> {
     let ctx = execution_context::ExecutionContext::new(run_type, sudo, &git, &config);
     let mut runner = runner::Runner::new(&ctx);
 
-    // If this is the first execution of a major release, inform user of breaking
-    // changes
-    if first_run_of_major_release()? {
+    // If
+    //
+    // 1. the breaking changes notification shouldnot be skipped
+    // 2. this is the first execution of a major release
+    //
+    // inform user of breaking changes
+    if !should_skip() && first_run_of_major_release()? {
         print_breaking_changes();
 
         if prompt_yesno("Confirmed?")? {