obsidian-export/src/main.rs
2021-02-15 21:24:23 +01:00

112 lines
3.9 KiB
Rust

use eyre::{eyre, Result};
use gumdrop::Options;
use obsidian_export::{ExportError, Exporter, FrontmatterStrategy, WalkOptions};
use std::{env, path::PathBuf};
const VERSION: &'static str = env!("CARGO_PKG_VERSION");
#[derive(Debug, Options)]
struct Opts {
#[options(help = "Display program help")]
help: bool,
#[options(help = "Display version information")]
version: bool,
#[options(help = "Source file containing reference", free, required)]
source: Option<PathBuf>,
#[options(help = "Destination file being linked to", free, required)]
destination: Option<PathBuf>,
#[options(
help = "Frontmatter strategy (one of: always, never, auto)",
no_short,
long = "frontmatter",
parse(try_from_str = "frontmatter_strategy_from_str"),
default = "auto"
)]
frontmatter_strategy: FrontmatterStrategy,
#[options(
no_short,
help = "Read ignore patterns from files with this name",
default = ".export-ignore"
)]
ignore_file: String,
#[options(no_short, help = "Export hidden files", default = "false")]
hidden: bool,
#[options(no_short, help = "Disable git integration", default = "false")]
no_git: bool,
#[options(no_short, help = "Don't process embeds recursively", default = "false")]
no_recursive_embeds: bool,
}
fn frontmatter_strategy_from_str(input: &str) -> Result<FrontmatterStrategy> {
match input {
"auto" => Ok(FrontmatterStrategy::Auto),
"always" => Ok(FrontmatterStrategy::Always),
"never" => Ok(FrontmatterStrategy::Never),
_ => Err(eyre!("must be one of: always, never, auto")),
}
}
fn main() {
// Due to the use of free arguments in Opts, we must bypass Gumdrop to determine whether the
// version flag was specified. Without this, "missing required free argument" would get printed
// when no other args are specified.
if env::args().any(|arg| arg == "-v" || arg == "--version") {
println!("obsidian-export {}", VERSION);
std::process::exit(0);
}
let args = Opts::parse_args_default_or_exit();
let source = args.source.unwrap();
let destination = args.destination.unwrap();
let walk_options = WalkOptions {
ignore_filename: &args.ignore_file,
ignore_hidden: !args.hidden,
honor_gitignore: !args.no_git,
..Default::default()
};
let mut exporter = Exporter::new(source, destination);
exporter.frontmatter_strategy(args.frontmatter_strategy);
exporter.process_embeds_recursively(!args.no_recursive_embeds);
exporter.walk_options(walk_options);
if let Err(err) = exporter.run() {
match err {
ExportError::FileExportError {
ref path,
ref source,
} => match &**source {
// An arguably better way of enhancing error reports would be to construct a custom
// `eyre::EyreHandler`, but that would require a fair amount of boilerplate and
// reimplementation of basic reporting.
ExportError::RecursionLimitExceeded { file_tree } => {
eprintln!(
"Error: {:?}",
eyre!(
"'{}' exceeds the maximum nesting limit of embeds",
path.display()
)
);
eprintln!("\nFile tree:");
for (idx, path) in file_tree.iter().enumerate() {
eprintln!(" {}-> {}", " ".repeat(idx), path.display());
}
eprintln!("\nHint: Ensure notes are non-recursive, or specify --no-recursive-embeds to break cycles")
}
_ => eprintln!("Error: {:?}", eyre!(err)),
},
_ => eprintln!("Error: {:?}", eyre!(err)),
};
std::process::exit(1);
};
}