added errors to remove anyhow dependency from mostrod

[arkanoider]

@grunch

added errors for anyhow removal

Summary by CodeRabbit

• New Features
  • Enhanced error reporting now provides clearer, more actionable messages related to environment configurations and file operations. This update improves the system's ability to pinpoint and communicate errors in real-time, allowing users to quickly identify and address issues, thereby enhancing troubleshooting effectiveness and overall system reliability for a more robust experience.

[coderabbitai]

Walkthrough

The pull request updates the error handling in the code by modifying the ServiceError enum in the error module. Two new variants, EnvVarError(String) and IOError(String), have been added to better represent environment variable and I/O related errors. Corresponding changes in the fmt::Display implementation ensure these variants are formatted correctly. Additionally, deprecated conversion code has been removed to streamline error management.

Changes

File(s)	Change Summary
src/error.rs	- Added EnvVarError(String) and IOError(String) variants to ServiceError - Updated fmt::Display implementation to handle the new variants - Removed commented-out error conversion implementations

Poem

I hop through lines of code with glee,
New error hops bring clarity to me.
Env and IO now join the dance,
Bouncing bugs get a second chance.
With whiskers twitching, I celebrate anew –
A rabbit’s cheer for changes true!

---

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📥 Commits

Reviewing files that changed from the base of the PR and between e05ed1d and 0b30e15.

📒 Files selected for processing (1)

• src/error.rs (2 hunks)

🔇 Additional comments (1)

src/error.rs (1)

92-93: Good addition of specific error types to support anyhow removal.

The addition of EnvVarError and IOError variants to the ServiceError enum helps eliminate the need for the anyhow crate by providing explicit error types for environment variable and I/O operations. Both implementations include the associated error message as a String, which maintains good error context.

Consider whether you'll need to implement From traits for converting from standard library errors (like std::env::VarError and std::io::Error) to these custom variants for ergonomic error handling. This would allow using the ? operator with these error types.

// Example implementation that might be needed elsewhere in the codebase
impl From<std::env::VarError> for ServiceError {
    fn from(err: std::env::VarError) -> Self {
        ServiceError::EnvVarError(err.to_string())
    }
}

impl From<std::io::Error> for ServiceError {
    fn from(err: std::io::Error) -> Self {
        ServiceError::IOError(err.to_string())
    }
}

Also applies to: 148-149

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[grunch]

Hey buddy, I don't see any anyhow removing in this PR

[arkanoider]

Hey buddy, I don't see any anyhow removing in this PR

Sorry title is misleading... it's referred to mostrod pr about anyhow removal. Will fix the title if i can from mobile.

[grunch]

LGTM