git.delta.rocks / jrsonnet / refs/commits / cc55b2dd2d98

1use std::{fs, path::Path};23use anyhow::Result;4use xshell::{cmd, Shell};56/// Checks that the `file` has the specified `contents`. If that is not the7/// case, updates the file and then fails the test.8pub fn ensure_file_contents(file: &Path, contents: &str) -> Result<()> {9	if let Ok(old_contents) = fs::read_to_string(file) {10		if normalize_newlines(&old_contents) == normalize_newlines(contents) {11			// File is already up to date.12			return Ok(());13		}14	}1516	eprintln!("{} was not up-to-date, updating", file.display());17	if let Some(parent) = file.parent() {18		let _ = fs::create_dir_all(parent);19	}20	fs::write(file, contents).unwrap();21	Ok(())22}2324// Eww, someone configured git to use crlf?25fn normalize_newlines(s: &str) -> String {26	s.replace("\r\n", "\n")27}2829pub(crate) fn pluralize(s: &str) -> String {30	format!("{}s", s)31}3233pub fn to_upper_snake_case(s: &str) -> String {34	let mut buf = String::with_capacity(s.len());35	let mut prev = false;36	for c in s.chars() {37		if c.is_ascii_uppercase() && prev {38			buf.push('_')39		}40		prev = true;4142		buf.push(c.to_ascii_uppercase());43	}44	buf45}46pub fn to_lower_snake_case(s: &str) -> String {47	let mut buf = String::with_capacity(s.len());48	let mut prev = false;49	for c in s.chars() {50		if c.is_ascii_uppercase() && prev {51			buf.push('_')52		}53		prev = true;5455		buf.push(c.to_ascii_lowercase());56	}57	buf58}5960pub fn to_pascal_case(s: &str) -> String {61	let mut buf = String::with_capacity(s.len());62	let mut prev_is_underscore = true;63	for c in s.chars() {64		if c == '_' {65			prev_is_underscore = true;66		} else if prev_is_underscore {67			buf.push(c.to_ascii_uppercase());68			prev_is_underscore = false;69		} else {70			buf.push(c.to_ascii_lowercase());71		}72	}73	buf74}7576pub fn reformat(text: &str) -> Result<String> {77	// let _e = pushenv("RUSTUP_TOOLCHAIN", "stable");78	// rustfmt()?;79	let sh = Shell::new()?;80	let stdout = cmd!(sh, "rustfmt").stdin(text).read()?;81	Ok(format!(82		"{}\n\n{}\n",83		"//! This is a generated file, please do not edit manually. Changes can be84//! made in codegeneration that lives in `xtask` top-level dir.",85		stdout86	))87}