36 lines
886 B
Rust
36 lines
886 B
Rust
use crate::{jobs::{ChildProc, JobBldr}, libsh::error::{ErrSpan, ShErr, ShErrKind, ShResult}, parse::{execute::prepare_argv, NdRule, Node}, prelude::*, state::write_vars};
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pub fn shift(node: Node, job: &mut JobBldr) -> ShResult<()> {
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let NdRule::Command { assignments: _, argv } = node.class else {
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unreachable!()
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};
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let child_pgid = if let Some(pgid) = job.pgid() {
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pgid
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} else {
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job.set_pgid(Pid::this());
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Pid::this()
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};
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let child = ChildProc::new(Pid::this(), Some("shift"), Some(child_pgid))?;
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job.push_child(child);
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let mut argv = prepare_argv(argv).into_iter().skip(1);
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if let Some((arg,span)) = argv.next() {
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let Ok(count) = arg.parse::<usize>() else {
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return Err(
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ShErr::full(
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ShErrKind::ExecFail,
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"Expected a number in shift args",
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span.into()
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)
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)
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};
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for _ in 0..count {
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write_vars(|v| v.fpop_arg());
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}
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}
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Ok(())
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}
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