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https://github.com/jj-vcs/jj.git
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c15cc344de
This adds a command that automatically bisects a range of commits using a specified command. By not having the interactive kind (e.g. `jj bisect good/bad/skip/reset`), we avoid - for now at least - having to decide where to store the state. The user can still achieve interactive bisection by passing their shell as the bisection command. Closes #2987.
70 lines
2.7 KiB
Rust
70 lines
2.7 KiB
Rust
// Copyright 2025 The Jujutsu Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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use std::env;
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use std::fs;
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use std::path::PathBuf;
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use std::process::exit;
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use itertools::Itertools as _;
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fn main() {
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let edit_script_path = PathBuf::from(env::var_os("BISECTION_SCRIPT").unwrap());
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let commit_to_test = env::var_os("JJ_BISECT_TARGET")
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.unwrap()
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.to_str()
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.unwrap()
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.to_owned();
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println!("fake-bisector testing commit {commit_to_test}");
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let edit_script = fs::read_to_string(&edit_script_path).unwrap();
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let mut instructions = edit_script.split('\0').collect_vec();
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if let Some(pos) = instructions.iter().position(|&i| i == "next invocation\n") {
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// Overwrite the edit script. The next time `fake-bisector` is called, it will
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// only see the part after the `next invocation` command.
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fs::write(&edit_script_path, instructions[pos + 1..].join("\0")).unwrap();
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instructions.truncate(pos);
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}
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for instruction in instructions {
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let (command, payload) = instruction.split_once('\n').unwrap_or((instruction, ""));
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let parts = command.split(' ').collect_vec();
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match parts.as_slice() {
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[""] => {}
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["fail"] => exit(1),
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["fail-if-target-is", bad_target_commit] => {
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if commit_to_test == *bad_target_commit {
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exit(1)
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}
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}
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["write", path] => {
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fs::write(path, payload).unwrap_or_else(|_| panic!("Failed to write file {path}"));
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}
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["jj", args @ ..] => {
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let jj_executable_path = PathBuf::from(env::var_os("JJ_EXECUTABLE_PATH").unwrap());
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let status = std::process::Command::new(&jj_executable_path)
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.args(args)
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.status()
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.unwrap();
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if !status.success() {
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eprintln!("fake-bisector: failed to run jj: {status:?}");
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exit(1)
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}
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}
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_ => {
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eprintln!("fake-bisector: unexpected command: {command}");
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exit(1)
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}
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}
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}
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}
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