rsconstruct 0.9.85

Rust based fast build system
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//! a2x generator — registered as a `SimpleGenerator` with a custom execute fn.

use anyhow::{Context, Result};
use std::fs;
use std::process::Command;

use crate::config::StandardConfig;
use crate::graph::Product;
use crate::processors::{check_command_output, ensure_output_dir, run_command};

use crate::processors::{DiscoverMode, SimpleGenerator, SimpleGeneratorParams};

fn execute_a2x(
    ctx: &crate::build_context::BuildContext,
    config: &StandardConfig,
    product: &Product,
) -> Result<()> {
    let input = product.primary_input();
    let output = product.primary_output();
    ensure_output_dir(output)?;
    let command = config.require_command("a2x")?;
    let mut cmd = Command::new(command);
    for arg in &config.args {
        cmd.arg(arg);
    }
    cmd.arg(input);
    let out = run_command(ctx, &cmd)?;
    check_command_output(&out, format_args!("a2x {}", input.display()))?;
    // a2x generates the PDF next to the input file — move it to the output path
    let stem = input.file_stem().context("a2x input has no file stem")?;
    let generated = input.with_file_name(format!("{}.pdf", stem.to_string_lossy()));
    if generated != *output {
        // a2x exiting 0 without producing the PDF must fail here, not later
        // as a confusing cache-store error about a missing output.
        if !generated.exists() {
            anyhow::bail!(
                "a2x reported success but did not produce {}",
                generated.display()
            );
        }
        fs::rename(&generated, output).with_context(|| {
            format!(
                "Failed to move a2x output from {} to {}",
                generated.display(),
                output.display()
            )
        })?;
    }
    Ok(())
}

fn create_a2x(toml: &toml::Value) -> anyhow::Result<Box<dyn crate::processors::Processor>> {
    crate::registries::deserialize_and_create(toml, |cfg| {
        Box::new(SimpleGenerator::new(
            cfg,
            SimpleGeneratorParams {
                extra_tools: &["python3"],
                extra_tools_fn: None,
                discover_mode: DiscoverMode::SingleFormat("pdf"),
                execute_fn: execute_a2x,
                is_native: false,
            },
        ))
    })
}
inventory::submit! { crate::registries::ProcessorPlugin {
    version: 1,
    name: "a2x", processor_type: crate::processors::ProcessorType::Generator, create: create_a2x,
    fields: &[],
    omit_standard_fields: &[],
    scan_defaults: Some(crate::config::ScanDefaultsData { src_dirs: &[], src_extensions: &[".txt"], src_exclude_dirs: &[] }),
    defaults: Some(crate::config::ProcessorDefaults { output_dir: "out/a2x", command: "a2x", ..crate::config::ProcessorDefaults::EMPTY }),
    defconfig_json: crate::registries::default_config_json::<crate::config::StandardConfig>,
    keywords: &["asciidoc", "converter", "generator", "documentation", "html", "pdf"],
    description: "Convert AsciiDoc files to PDF",
    is_native: false,
    can_fix: false,
    supports_batch: false,
    max_jobs_cap: None,
} }