config: change default config to use toml-based configuration

toml-config/src/config/parsers/exec.rs

@@ -0,0 +1,91 @@
+use {
+    crate::{
+        config::{
+            context::Context,
+            extractor::{arr, opt, str, val, Extractor, ExtractorError},
+            parser::{DataType, ParseResult, Parser, UnexpectedDataType},
+            parsers::{
+                env::{EnvParser, EnvParserError},
+                StringParser, StringParserError,
+            },
+            Exec,
+        },
+        toml::{
+            toml_span::{Span, Spanned, SpannedExt},
+            toml_value::Value,
+        },
+    },
+    indexmap::IndexMap,
+    thiserror::Error,
+};
+
+#[derive(Debug, Error)]
+pub enum ExecParserError {
+    #[error(transparent)]
+    Expected(#[from] UnexpectedDataType),
+    #[error(transparent)]
+    Extractor(#[from] ExtractorError),
+    #[error(transparent)]
+    String(#[from] StringParserError),
+    #[error(transparent)]
+    Env(#[from] EnvParserError),
+    #[error("Array cannot be empty")]
+    Empty,
+}
+
+pub struct ExecParser<'a>(pub &'a Context<'a>);
+
+impl Parser for ExecParser<'_> {
+    type Value = Exec;
+    type Error = ExecParserError;
+    const EXPECTED: &'static [DataType] = &[DataType::String, DataType::Array, DataType::Table];
+
+    fn parse_string(&mut self, _span: Span, string: &str) -> ParseResult<Self> {
+        Ok(Exec {
+            prog: string.to_string(),
+            args: vec![],
+            envs: vec![],
+        })
+    }
+
+    fn parse_array(&mut self, span: Span, array: &[Spanned<Value>]) -> ParseResult<Self> {
+        if array.is_empty() {
+            return Err(ExecParserError::Empty.spanned(span));
+        }
+        let prog = array[0].parse_map(&mut StringParser)?;
+        let mut args = vec![];
+        for v in &array[1..] {
+            args.push(v.parse_map(&mut StringParser)?);
+        }
+        Ok(Exec {
+            prog,
+            args,
+            envs: vec![],
+        })
+    }
+
+    fn parse_table(
+        &mut self,
+        span: Span,
+        table: &IndexMap<Spanned<String>, Spanned<Value>>,
+    ) -> ParseResult<Self> {
+        let mut ext = Extractor::new(self.0, span, table);
+        let (prog, args_val, envs_val) =
+            ext.extract((str("prog"), opt(arr("args")), opt(val("env"))))?;
+        let mut args = vec![];
+        if let Some(args_val) = args_val {
+            for arg in args_val.value {
+                args.push(arg.parse_map(&mut StringParser)?);
+            }
+        }
+        let envs = match envs_val {
+            None => vec![],
+            Some(e) => e.parse_map(&mut EnvParser)?,
+        };
+        Ok(Exec {
+            prog: prog.value.to_string(),
+            args,
+            envs,
+        })
+    }
+}