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use std::collections::{HashMap, HashSet};
use crate::engine::EngineState;
use crate::engine::DEFAULT_OVERLAY_NAME;
use crate::{ShellError, Span, Value, VarId};
pub type EnvVars = HashMap<String, HashMap<String, Value>>;
#[derive(Debug, Clone)]
pub struct ProfilingConfig {
pub max_depth: i64,
pub depth: i64,
pub collect_source: bool,
pub collect_values: bool,
}
impl ProfilingConfig {
pub fn new(max_depth: i64, collect_source: bool, collect_values: bool) -> Self {
ProfilingConfig {
max_depth,
depth: 0,
collect_source,
collect_values,
}
}
pub fn enter_block(&mut self) {
self.depth += 1;
}
pub fn leave_block(&mut self) {
self.depth -= 1;
}
pub fn should_debug(&self) -> bool {
self.depth <= self.max_depth
}
pub fn reset(&mut self) {
self.max_depth = 0;
self.depth = 0;
self.collect_source = false;
self.collect_values = false;
}
}
#[derive(Debug, Clone)]
pub struct Stack {
pub vars: Vec<(VarId, Value)>,
pub env_vars: Vec<EnvVars>,
pub env_hidden: HashMap<String, HashSet<String>>,
pub active_overlays: Vec<String>,
pub recursion_count: Box<u64>,
pub profiling_config: ProfilingConfig,
}
impl Stack {
pub fn new() -> Stack {
Stack {
vars: vec![],
env_vars: vec![],
env_hidden: HashMap::new(),
active_overlays: vec![DEFAULT_OVERLAY_NAME.to_string()],
recursion_count: Box::new(0),
profiling_config: ProfilingConfig::new(0, false, false),
}
}
pub fn with_env(
&mut self,
env_vars: &[EnvVars],
env_hidden: &HashMap<String, HashSet<String>>,
) {
if self.env_vars.iter().any(|scope| !scope.is_empty()) {
self.env_vars = env_vars.to_owned();
}
if !self.env_hidden.is_empty() {
self.env_hidden = env_hidden.to_owned();
}
}
pub fn get_var(&self, var_id: VarId, span: Span) -> Result<Value, ShellError> {
for (id, val) in &self.vars {
if var_id == *id {
return Ok(val.clone().with_span(span));
}
}
Err(ShellError::VariableNotFoundAtRuntime { span })
}
pub fn get_var_with_origin(&self, var_id: VarId, span: Span) -> Result<Value, ShellError> {
for (id, val) in &self.vars {
if var_id == *id {
return Ok(val.clone());
}
}
Err(ShellError::VariableNotFoundAtRuntime { span })
}
pub fn add_var(&mut self, var_id: VarId, value: Value) {
for (id, val) in &mut self.vars {
if *id == var_id {
*val = value;
return;
}
}
self.vars.push((var_id, value));
}
pub fn remove_var(&mut self, var_id: VarId) {
for (idx, (id, _)) in self.vars.iter().enumerate() {
if *id == var_id {
self.vars.remove(idx);
return;
}
}
}
pub fn add_env_var(&mut self, var: String, value: Value) {
if let Some(last_overlay) = self.active_overlays.last() {
if let Some(env_hidden) = self.env_hidden.get_mut(last_overlay) {
env_hidden.remove(&var);
}
if let Some(scope) = self.env_vars.last_mut() {
if let Some(env_vars) = scope.get_mut(last_overlay) {
env_vars.insert(var, value);
} else {
scope.insert(last_overlay.into(), HashMap::from([(var, value)]));
}
} else {
self.env_vars.push(HashMap::from([(
last_overlay.into(),
HashMap::from([(var, value)]),
)]));
}
} else {
panic!("internal error: no active overlay");
}
}
pub fn last_overlay_name(&self) -> Result<String, ShellError> {
self.active_overlays
.last()
.cloned()
.ok_or_else(|| ShellError::NushellFailed {
msg: "No active overlay".into(),
})
}
pub fn captures_to_stack(&self, captures: &HashMap<VarId, Value>) -> Stack {
let mut env_vars = self.env_vars.clone();
env_vars.push(HashMap::new());
let mut vars = vec![];
for (id, val) in captures {
vars.push((*id, val.clone()));
}
Stack {
vars,
env_vars,
env_hidden: self.env_hidden.clone(),
active_overlays: self.active_overlays.clone(),
recursion_count: self.recursion_count.to_owned(),
profiling_config: self.profiling_config.clone(),
}
}
pub fn gather_captures(&self, captures: &[VarId]) -> Stack {
let mut vars = vec![];
let fake_span = Span::new(0, 0);
for capture in captures {
if let Ok(value) = self.get_var(*capture, fake_span) {
vars.push((*capture, value));
}
}
let mut env_vars = self.env_vars.clone();
env_vars.push(HashMap::new());
Stack {
vars,
env_vars,
env_hidden: self.env_hidden.clone(),
active_overlays: self.active_overlays.clone(),
recursion_count: self.recursion_count.to_owned(),
profiling_config: self.profiling_config.clone(),
}
}
pub fn get_env_vars(&self, engine_state: &EngineState) -> HashMap<String, Value> {
let mut result = HashMap::new();
for active_overlay in self.active_overlays.iter() {
if let Some(env_vars) = engine_state.env_vars.get(active_overlay) {
result.extend(
env_vars
.iter()
.filter(|(k, _)| {
if let Some(env_hidden) = self.env_hidden.get(active_overlay) {
!env_hidden.contains(*k)
} else {
true
}
})
.map(|(k, v)| (k.clone(), v.clone()))
.collect::<HashMap<String, Value>>(),
);
}
}
result.extend(self.get_stack_env_vars());
result
}
pub fn get_stack_env_vars(&self) -> HashMap<String, Value> {
let mut result = HashMap::new();
for scope in &self.env_vars {
for active_overlay in self.active_overlays.iter() {
if let Some(env_vars) = scope.get(active_overlay) {
result.extend(env_vars.clone());
}
}
}
result
}
pub fn get_stack_overlay_env_vars(&self, overlay_name: &str) -> HashMap<String, Value> {
let mut result = HashMap::new();
for scope in &self.env_vars {
if let Some(active_overlay) = self.active_overlays.iter().find(|n| n == &overlay_name) {
if let Some(env_vars) = scope.get(active_overlay) {
result.extend(env_vars.clone());
}
}
}
result
}
pub fn get_env_var_names(&self, engine_state: &EngineState) -> HashSet<String> {
let mut result = HashSet::new();
for active_overlay in self.active_overlays.iter() {
if let Some(env_vars) = engine_state.env_vars.get(active_overlay) {
result.extend(
env_vars
.keys()
.filter(|k| {
if let Some(env_hidden) = self.env_hidden.get(active_overlay) {
!env_hidden.contains(*k)
} else {
true
}
})
.cloned()
.collect::<HashSet<String>>(),
);
}
}
for scope in &self.env_vars {
for active_overlay in self.active_overlays.iter() {
if let Some(env_vars) = scope.get(active_overlay) {
result.extend(env_vars.keys().cloned().collect::<HashSet<String>>());
}
}
}
result
}
pub fn get_env_var(&self, engine_state: &EngineState, name: &str) -> Option<Value> {
for scope in self.env_vars.iter().rev() {
for active_overlay in self.active_overlays.iter().rev() {
if let Some(env_vars) = scope.get(active_overlay) {
if let Some(v) = env_vars.get(name) {
return Some(v.clone());
}
}
}
}
for active_overlay in self.active_overlays.iter().rev() {
let is_hidden = if let Some(env_hidden) = self.env_hidden.get(active_overlay) {
env_hidden.contains(name)
} else {
false
};
if !is_hidden {
if let Some(env_vars) = engine_state.env_vars.get(active_overlay) {
if let Some(v) = env_vars.get(name) {
return Some(v.clone());
}
}
}
}
None
}
pub fn has_env_var(&self, engine_state: &EngineState, name: &str) -> bool {
for scope in self.env_vars.iter().rev() {
for active_overlay in self.active_overlays.iter().rev() {
if let Some(env_vars) = scope.get(active_overlay) {
if env_vars.contains_key(name) {
return true;
}
}
}
}
for active_overlay in self.active_overlays.iter().rev() {
let is_hidden = if let Some(env_hidden) = self.env_hidden.get(active_overlay) {
env_hidden.contains(name)
} else {
false
};
if !is_hidden {
if let Some(env_vars) = engine_state.env_vars.get(active_overlay) {
if env_vars.contains_key(name) {
return true;
}
}
}
}
false
}
pub fn remove_env_var(&mut self, engine_state: &EngineState, name: &str) -> bool {
for scope in self.env_vars.iter_mut().rev() {
for active_overlay in self.active_overlays.iter().rev() {
if let Some(env_vars) = scope.get_mut(active_overlay) {
if env_vars.remove(name).is_some() {
return true;
}
}
}
}
for active_overlay in self.active_overlays.iter().rev() {
if let Some(env_vars) = engine_state.env_vars.get(active_overlay) {
if env_vars.get(name).is_some() {
if let Some(env_hidden) = self.env_hidden.get_mut(active_overlay) {
env_hidden.insert(name.into());
} else {
self.env_hidden
.insert(active_overlay.into(), HashSet::from([name.into()]));
}
return true;
}
}
}
false
}
pub fn has_env_overlay(&self, name: &str, engine_state: &EngineState) -> bool {
for scope in self.env_vars.iter().rev() {
if scope.contains_key(name) {
return true;
}
}
engine_state.env_vars.contains_key(name)
}
pub fn is_overlay_active(&self, name: &String) -> bool {
self.active_overlays.contains(name)
}
pub fn add_overlay(&mut self, name: String) {
self.active_overlays.retain(|o| o != &name);
self.active_overlays.push(name);
}
pub fn remove_overlay(&mut self, name: &String) {
self.active_overlays.retain(|o| o != name);
}
}
impl Default for Stack {
fn default() -> Self {
Self::new()
}
}