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use std::convert::TryFrom;
use crate::dockerfile::Instruction;
use crate::error::*;
use crate::util::*;
use crate::parser::*;
#[derive(Debug, PartialEq, Eq, Clone)]
pub enum CmdInstruction {
Shell(String),
Exec(Vec<String>)
}
impl CmdInstruction {
pub(crate) fn from_exec_record(record: Pair) -> Result<CmdInstruction> {
Ok(CmdInstruction::Exec(parse_string_array(record)?))
}
pub(crate) fn from_shell_record(record: Pair) -> Result<CmdInstruction> {
Ok(CmdInstruction::Shell(
clean_escaped_breaks(record.as_str())
))
}
pub fn shell<S: Into<String>>(s: S) -> CmdInstruction {
CmdInstruction::Shell(s.into())
}
pub fn exec<S: Into<String>>(args: Vec<S>) -> CmdInstruction {
CmdInstruction::Exec(args.into_iter().map(|s| s.into()).collect())
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::test_util::*;
#[test]
fn cmd_basic() -> Result<()> {
assert_eq!(
parse_single(r#"cmd echo "hello world""#, Rule::cmd)?,
CmdInstruction::shell("echo \"hello world\"").into()
);
assert_eq!(
parse_single(r#"cmd ["echo", "hello world"]"#, Rule::cmd)?,
CmdInstruction::exec(vec!["echo", "hello world"]).into()
);
Ok(())
}
#[test]
fn cmd_multiline() -> Result<()> {
assert_eq!(
parse_single(r#"cmd echo \
"hello world""#, Rule::cmd)?,
CmdInstruction::shell("echo \"hello world\"").into()
);
assert_eq!(
parse_single(r#"cmd\
[\
"echo", \
"hello world"\
]"#, Rule::cmd)?,
CmdInstruction::exec(vec!["echo", "hello world"]).into()
);
Ok(())
}
}
impl<'a> TryFrom<&'a Instruction> for &'a CmdInstruction {
type Error = Error;
fn try_from(instruction: &'a Instruction) -> std::result::Result<Self, Self::Error> {
if let Instruction::Cmd(c) = instruction {
Ok(c)
} else {
Err(Error::ConversionError {
from: format!("{:?}", instruction),
to: "CmdInstruction".into()
})
}
}
}