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首个 iced + Material 3 Expressive 版本的源码快照。 完整历史与日常提交在 dev 分支;main 只放阶段性快照。
216 lines
7.4 KiB
Rust
216 lines
7.4 KiB
Rust
//! 双格式输出:人类可读行 + `--json` 机器可读载荷。
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//!
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//! 一个命令只产出 [`Report`](`data` 给脚本,`human` 给人);怎么打印由 [`print_report`]
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//! 一处决定,命令里不出现 `println!`——这样集成测试能直接断言输出形状,
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//! 也能保证 `--json` 覆盖到每个命令(10-cli-design.md §3 全局参数)。
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use std::io::Write;
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use serde_json::{json, Value};
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use crate::error::CliError;
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/// 一个命令的结果。
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#[derive(Debug, Clone)]
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pub struct Report {
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/// `--json` 模式下的 `data` 载荷。
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pub data: Value,
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/// 人类可读输出(一行一条)。
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pub human: Vec<String>,
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}
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impl Report {
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/// 构造(人类可读行在这里就把程序名占位符渲染掉,见 [`crate::cli::program::PLACEHOLDER`])。
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#[must_use]
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pub fn new(data: Value, human: Vec<String>) -> Self {
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Self {
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data,
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human: human.into_iter().map(|line| fill_program(&line)).collect(),
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}
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}
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}
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/// 命令结果 + 环境提示(D19/D21 低于基线时的升级指引之类,不混进 `data`)。
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#[derive(Debug, Clone)]
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pub struct Outcome {
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/// 命令结果。
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pub report: Report,
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/// 环境级提示(人类模式进 stderr,JSON 模式进信封的 `warnings`)。
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pub warnings: Vec<String>,
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/// 命令自定义的退出码;`None` = 0(绝大多数命令)。
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///
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/// 只有"结果多态且脚本要分流"的命令才用得上:`ull pack import` 的三态是
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/// `0` 成功 / `3` 部分成功 / `1` 失败,光靠 0/1 分不出来。加这个字段而不是让命令
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/// 自己 `std::process::exit`,是为了让**输出照常刷新**(绕过 runner 的输出刷新会把
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/// "输出没刷完就退出"这种 bug 装进 CLI)。
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pub exit_code: Option<i32>,
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}
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impl Outcome {
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/// 无提示的结果。
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#[must_use]
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pub fn new(report: Report) -> Self {
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Self {
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report,
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warnings: Vec::new(),
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exit_code: None,
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}
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}
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/// 带上环境提示(同样在构造时渲染占位符,JSON 与人类可读两条出口才不会分叉)。
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#[must_use]
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pub fn with_warnings(report: Report, warnings: Vec<String>) -> Self {
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Self {
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report,
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warnings: warnings
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.into_iter()
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.map(|line| fill_program(&line))
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.collect(),
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exit_code: None,
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}
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}
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/// 指定进程退出码(不指定 = 0)。
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#[must_use]
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pub fn with_exit_code(mut self, code: i32) -> Self {
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self.exit_code = Some(code);
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self
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}
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}
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/// 打印成功结果。
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///
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/// # Errors
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///
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/// 写 stdout/stderr 失败时返回 IO 错误(管道被关掉等)。
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pub fn print_report(
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outcome: &Outcome,
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json: bool,
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quiet: bool,
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out: &mut dyn Write,
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err: &mut dyn Write,
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) -> std::io::Result<()> {
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if json {
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// 信封固定三个键,脚本按 `ok` 分流后直接吃 `data`。
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let envelope = json!({
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"ok": true,
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"data": outcome.report.data,
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"warnings": outcome.warnings,
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});
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writeln!(out, "{}", serde_json::to_string_pretty(&envelope)?)?;
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return Ok(());
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}
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if !quiet {
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for line in &outcome.report.human {
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writeln!(out, "{line}")?;
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}
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}
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for warning in &outcome.warnings {
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writeln!(err, "提示: {warning}")?;
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}
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Ok(())
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}
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/// 打印错误(人类模式进 stderr,JSON 模式进 stdout 的错误信封)。
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///
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/// # Errors
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///
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/// 写 stdout/stderr 失败时返回 IO 错误。
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pub fn print_error(
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error: &CliError,
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json: bool,
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out: &mut dyn Write,
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err: &mut dyn Write,
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) -> std::io::Result<()> {
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if json {
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writeln!(out, "{}", serde_json::to_string_pretty(&error.to_json())?)?;
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return Ok(());
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}
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writeln!(err, "错误: {}", error.message())?;
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if let Some(hint) = error.hint() {
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writeln!(err, "提示: {hint}")?;
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}
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Ok(())
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}
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/// 渲染文案里的程序名占位符(M82)。
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///
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/// **只替换占位符**,不对整条文本做词替换:消息里插值进来的账户名 / 路径 / 回显的子命令
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/// 一个字节都不动(r1 曾把账户名 `ull` 改成程序名、把 `D:/tmp/ull/.ULL` 改成
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/// `D:/tmp/unlucky-launcher/.ULL`)。
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fn fill_program(text: &str) -> String {
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crate::cli::program::fill(text)
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}
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/// 长任务的实时进度行(**只进 stderr**,不参与 [`Report`])。
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///
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/// 命令的正经输出仍然全部走 [`Report`](stdout、可断言的形状);下载/安装这类分钟级任务
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/// 需要无缓冲的实时反馈,才单独开这条通道。行内不含 ANSI,`--no-color` 无需处理。
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///
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/// `--json` / `--quiet` 的抑制由**调用方**决定(`InstallArgs::progress` 已按全局选项算好),
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/// 这样这条通道不需要知道全局选项长什么样。
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///
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/// 写不出去(管道早闭)就静默放弃:进度永远不该让命令失败。
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pub fn progress_line(text: &str) {
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let mut stderr = std::io::stderr();
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let _ = writeln!(stderr, "{text}");
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let _ = stderr.flush();
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}
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#[cfg(test)]
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mod tests {
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use super::{print_report, progress_line, Outcome, Report};
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use crate::cli::program::{self, PLACEHOLDER};
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use crate::error::CliError;
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use serde_json::json;
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#[test]
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fn progress_line_never_panics() {
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// 只验证"写不出去也不抛"(真实 stderr 在测试里通常可写)。
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progress_line("测试进度 1/2");
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progress_line("");
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}
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#[test]
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fn json_error_envelope_never_leaks_the_placeholder() {
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// r2 的回归:JSON 分支直接序列化未渲染的 message/hint,`%prog%` 原样漏给脚本。
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let error = CliError::usage(format!("{PLACEHOLDER} 需要一个值"))
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.with_hint(format!("{PLACEHOLDER} --help 查看命令列表"));
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let envelope = serde_json::to_string(&error.to_json()).expect("序列化");
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assert!(!envelope.contains(PLACEHOLDER), "{envelope}");
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assert!(envelope.contains(&program::name()), "{envelope}");
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}
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#[test]
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fn json_warnings_never_leak_the_placeholder() {
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// warnings 是第二条 JSON 出口(以前连人类可读那条都没走到)。
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let report = Report::new(
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json!({ "ok": true }),
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vec![format!("{PLACEHOLDER} instances list 看看现有实例")],
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);
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let outcome =
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Outcome::with_warnings(report, vec![format!("用 {PLACEHOLDER} install 装版本")]);
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let mut out: Vec<u8> = Vec::new();
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let mut err: Vec<u8> = Vec::new();
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print_report(&outcome, true, false, &mut out, &mut err).expect("写 JSON");
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let text = String::from_utf8_lossy(&out).into_owned();
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assert!(!text.contains(PLACEHOLDER), "{text}");
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assert!(text.contains(&program::name()), "{text}");
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}
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#[test]
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fn human_lines_render_the_placeholder_too() {
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let report = Report::new(
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json!({}),
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vec![format!("用 `{PLACEHOLDER} install` 登记实例")],
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);
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assert_eq!(
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report.human[0],
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format!("用 `{} install` 登记实例", program::name())
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);
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// 用户数据不受影响:账户名恰好叫 ull 的那种
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let report = Report::new(json!({}), vec!["找不到账户 `ull`".to_string()]);
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assert_eq!(report.human[0], "找不到账户 `ull`");
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}
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}
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