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Improve parser

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This commit is contained in:
Yehuda Katz
2019-06-04 14:42:31 -07:00
parent 45c76be4d1
commit f3bb4a03c2
13 changed files with 3689 additions and 1178 deletions
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80
src/cli.rs
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@ -10,7 +10,8 @@ use crate::evaluate::Scope;
crate use crate::format::{EntriesListView, GenericView};
use crate::git::current_branch;
use crate::object::Value;
use crate::parser::{ParsedCommand, Pipeline};
use crate::parser::ast::{Expression, Leaf};
use crate::parser::{Args, ParsedCommand, Pipeline};
use crate::stream::empty_stream;
use log::debug;
@ -208,6 +209,18 @@ async fn process_line(readline: Result<String, ReadlineError>, ctx: &mut Context
input = match (item, next) {
(None, _) => break,
(Some(ClassifiedCommand::Expr(_)), _) => {
return LineResult::Error(ShellError::unimplemented(
"Expression-only commands",
))
}
(_, Some(ClassifiedCommand::Expr(_))) => {
return LineResult::Error(ShellError::unimplemented(
"Expression-only commands",
))
}
(
Some(ClassifiedCommand::Internal(left)),
Some(ClassifiedCommand::Internal(_)),
@ -305,36 +318,55 @@ fn classify_pipeline(
}
fn classify_command(
command: &ParsedCommand,
command: &Expression,
context: &Context,
) -> Result<ClassifiedCommand, ShellError> {
let command_name = &command.name[..];
let args = &command.args;
// let command_name = &command.name[..];
// let args = &command.args;
match command_name {
other => match context.has_command(command_name) {
true => {
let command = context.get_command(command_name);
let config = command.config();
let scope = Scope::empty();
if let Expression::Call(call) = command {
match (&call.name, &call.args) {
(Expression::Leaf(Leaf::Bare(name)), args) => {
match context.has_command(&name.to_string()) {
true => {
let command = context.get_command(&name.to_string());
let config = command.config();
let scope = Scope::empty();
let args = config.evaluate_args(args.iter(), &scope)?;
let args = match args {
Some(args) => config.evaluate_args(args.iter(), &scope)?,
None => Args::default(),
};
Ok(ClassifiedCommand::Internal(InternalCommand {
command,
args,
}))
Ok(ClassifiedCommand::Internal(InternalCommand {
command,
args,
}))
}
false => {
let arg_list_strings: Vec<String> = match args {
Some(args) => args.iter().map(|i| i.as_external_arg()).collect(),
None => vec![],
};
Ok(ClassifiedCommand::External(ExternalCommand {
name: name.to_string(),
args: arg_list_strings,
}))
}
}
}
false => {
let arg_list_strings: Vec<String> =
args.iter().map(|i| i.as_external_arg()).collect();
Ok(ClassifiedCommand::External(ExternalCommand {
name: other.to_string(),
args: arg_list_strings,
}))
}
},
(_, None) => Err(ShellError::string(
"Unimplemented command that is just an expression (1)",
)),
(_, Some(args)) => Err(ShellError::string("Unimplemented dynamic command")),
}
} else {
Err(ShellError::string(&format!(
"Unimplemented command that is just an expression (2) -- {:?}",
command
)))
}
}