46 lines
1.4 KiB
Rust
46 lines
1.4 KiB
Rust
use crate::error::{CliError, Result};
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use serde_json::Value;
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use std::{
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fs, io,
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path::{Path, PathBuf},
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};
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pub fn read_file_to_json(path: &PathBuf) -> Result<Value> {
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let content = fs::read_to_string(path).map_err(|e| io_error("读取文件", path, e))?;
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serde_json::from_str(&content).map_err(|e| {
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CliError::InvalidData(format!("解析 JSON '{}' 失败: {}", path.display(), e))
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})
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}
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pub fn write_json_to_file(path: &PathBuf, value: &Value) -> Result<()> {
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let content = serde_json::to_string_pretty(value).map_err(|e| {
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CliError::InvalidData(format!("序列化 JSON '{}' 失败: {}", path.display(), e))
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})?;
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fs::write(path, content).map_err(|e| io_error("写入文件", path, e))?;
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Ok(())
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}
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pub fn update_json_file<F>(path: &PathBuf, updater: F) -> Result<()>
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where
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F: FnOnce(&mut Value) -> Result<()>,
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{
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let mut json = read_file_to_json(path)?;
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updater(&mut json)?;
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write_json_to_file(path, &json)?;
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Ok(())
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}
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pub fn find_project_dir(path: &Option<String>) -> Result<PathBuf> {
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let path = path.as_deref().unwrap_or(".");
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Ok(PathBuf::from(path))
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}
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/// Wraps an [`io::Error`] with the operation name and path so error messages
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/// stop being anonymous "os error 3" strings.
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pub fn io_error(op: &str, path: &Path, err: io::Error) -> CliError {
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CliError::Io(io::Error::new(
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err.kind(),
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format!("{} '{}' 失败: {}", op, path.display(), err),
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))
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}
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