37 lines
1.0 KiB
Rust
37 lines
1.0 KiB
Rust
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use std::fmt;
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use std::path::Path;
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use anyhow::{Context, Result};
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#[derive(Debug)]
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pub struct Generation(u64);
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impl Generation {
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pub fn from_toplevel(toplevel: impl AsRef<Path>) -> Result<Self> {
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let file_name = toplevel.as_ref().file_name().ok_or(anyhow::anyhow!(
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"Failed to extract file name from generation"
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))?;
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let file_name_str = file_name
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.to_str()
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.with_context(|| "Failed to convert file name of generation to string")?;
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let generation_version = file_name_str
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.split("-")
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.nth(1)
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.ok_or(anyhow::anyhow!("Failed to extract version from generation"))?;
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let parsed_generation_version = generation_version.parse().with_context(|| {
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format!("Failed to parse generation version: {}", generation_version)
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})?;
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Ok(Self(parsed_generation_version))
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}
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}
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impl fmt::Display for Generation {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{}", self.0)
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}
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}
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