| 1 | //! The program inside a g1t sandbox: it does one piece of work and |
| 2 | //! reports back to g1t. |
| 3 | //! |
| 4 | //! `MODE` selects the work: `actions` runs one job of a GitHub Actions |
| 5 | //! workflow, `queue` builds and checks a state of the merge queue, |
| 6 | //! `mergecheck` finds out whether a pull request merges cleanly, `deploy` |
| 7 | //! builds a commit for g1t.page, `bump` makes a dependency update (one |
| 8 | //! package raised in its lockfiles, pushed as g1t), `backup` cuts a |
| 9 | //! repository's nightly backup bundle, and `checks` runs an issue's |
| 10 | //! commands, from before checks were workflows. See the modules of those |
| 11 | //! names. It talks to g1t only through the public API and git. |
| 12 | //! |
| 13 | //! Every mode runs with the mining watch in `abuse`: a sandbox that looks |
| 14 | //! like it is mining stops itself and exits with `abuse::EXIT_CODE`. |
| 15 | //! |
| 16 | //! Given a command instead (`register`, `run`, `service`, `remove`, |
| 17 | //! `update`, `version`), it is a self-hosted runner on someone's own |
| 18 | //! machine, which runs work in these modes: see `selfhosted`. |
| 19 | //! |
| 20 | //! `deploy` and `detect` are for a workflow step: a g1t.page build of the |
| 21 | //! job's own checkout, and what that build would find (see `deploy`). |
| 22 | |
| 23 | mod abuse; |
| 24 | mod actions; |
| 25 | mod backup; |
| 26 | mod bump; |
| 27 | mod checks; |
| 28 | mod clone; |
| 29 | mod deploy; |
| 30 | mod docker; |
| 31 | mod guard; |
| 32 | mod mergecheck; |
| 33 | mod queue; |
| 34 | mod selfhosted; |
| 35 | |
| 36 | use std::path::Path; |
| 37 | use std::process::Command; |
| 38 | |
| 39 | use anyhow::{Context, Result, bail}; |
| 40 | use base64::Engine; |
| 41 | use base64::engine::general_purpose::STANDARD; |
| 42 | |
| 43 | pub(crate) const WORKDIR: &str = "/work/repo"; |
| 44 | /// The name and address on every commit g1t makes here: |
| 45 | /// `g1t_contracts::system::{USERNAME, EMAIL}`. |
| 46 | pub(crate) const AUTHOR_NAME: &str = "g1t"; |
| 47 | pub(crate) const AUTHOR_EMAIL: &str = "g1t@users.noreply.g1t.sh"; |
| 48 | |
| 49 | pub(crate) fn env(name: &str) -> Result<String> { |
| 50 | std::env::var(name).with_context(|| format!("{name} is not set")) |
| 51 | } |
| 52 | |
| 53 | /// Runs git and returns its trimmed output, failing on a non-zero exit. |
| 54 | pub(crate) fn git(dir: &Path, args: &[&str]) -> Result<String> { |
| 55 | let output = Command::new("git") |
| 56 | .current_dir(dir) |
| 57 | .args(args) |
| 58 | .output() |
| 59 | .context("could not run git")?; |
| 60 | if !output.status.success() { |
| 61 | bail!( |
| 62 | "git {} failed: {}", |
| 63 | args.first().unwrap_or(&""), |
| 64 | String::from_utf8_lossy(&output.stderr).trim() |
| 65 | ); |
| 66 | } |
| 67 | Ok(String::from_utf8_lossy(&output.stdout).trim().to_owned()) |
| 68 | } |
| 69 | |
| 70 | /// A git option that authenticates one command. The credential is passed |
| 71 | /// per command and never written to the clone's config or its remote URL, |
| 72 | /// where the work's own commands would find it. |
| 73 | pub(crate) fn auth_option(user: &str, token: &str) -> String { |
| 74 | let credentials = STANDARD.encode(format!("{user}:{token}")); |
| 75 | format!("http.extraHeader=Authorization: Basic {credentials}") |
| 76 | } |
| 77 | |
| 78 | fn main() { |
| 79 | // The runc the job's Docker Engine starts containers with (docker/oci.rs). |
| 80 | if docker::oci::invoked_as_runc() { |
| 81 | docker::oci::main(); |
| 82 | } |
| 83 | // A self-hosted runner's commands; the modes below are what it, and |
| 84 | // g1t's sandboxes, run work with. |
| 85 | let args: Vec<String> = std::env::args().skip(1).collect(); |
| 86 | // From a workflow step: a g1t.page build of the job's own checkout, |
| 87 | // and what it would find (deploy.rs). |
| 88 | match args.first().map(String::as_str) { |
| 89 | Some("deploy") => std::process::exit(deploy::cli(&args[1..])), |
| 90 | Some("detect") => std::process::exit(deploy::detect_cli(&args[1..])), |
| 91 | _ => {} |
| 92 | } |
| 93 | if selfhosted::is_command(&args) { |
| 94 | std::process::exit(selfhosted::main(args)); |
| 95 | } |
| 96 | // A sandbox whose HTTPS passes the Worker has it re-signed: trust that |
| 97 | // before anything is fetched. |
| 98 | guard::trust_egress_ca(); |
| 99 | // Watches for mining for as long as the sandbox runs (abuse.rs). |
| 100 | abuse::watch(); |
| 101 | // The work a sandbox is started for. |
| 102 | let code = match std::env::var("MODE").as_deref() { |
| 103 | Ok("actions") => actions::main(), |
| 104 | Ok("backup") => backup::main(), |
| 105 | Ok("bump") => bump::main(), |
| 106 | Ok("checks") => checks::main(), |
| 107 | Ok("deploy") => deploy::main(), |
| 108 | Ok("queue") => queue::main(), |
| 109 | Ok("mergecheck") => mergecheck::main(), |
| 110 | // Work g1t no longer does (an agent's run, a review, a plan, a |
| 111 | // catch-up merge), handed over by an older g1t: refused, saying so. |
| 112 | Ok(mode) => { |
| 113 | eprintln!("g1t-runner: this runner does not do work of mode {mode}"); |
| 114 | 2 |
| 115 | } |
| 116 | Err(_) => { |
| 117 | eprintln!("g1t-runner: MODE is not set: nothing to do"); |
| 118 | 2 |
| 119 | } |
| 120 | }; |
| 121 | std::process::exit(code); |
| 122 | } |