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| 1 | +use rush_expand::Context; |
| 2 | +use rush_parser::{CaseStatement, CompleteCommand, ForStatement, IfStatement, WhileStatement}; |
| 3 | +use crate::{ExecutionResult, PipelineError}; |
| 4 | + |
| 5 | +/// Execute an if statement |
| 6 | +pub fn execute_if( |
| 7 | + if_stmt: &IfStatement, |
| 8 | + context: &mut Context, |
| 9 | +) -> Result<ExecutionResult, PipelineError> { |
| 10 | + // Execute the condition and check if it succeeded |
| 11 | + let condition_result = execute_complete_command(&if_stmt.condition, context)?; |
| 12 | + |
| 13 | + if condition_result.success() { |
| 14 | + // Condition was true, execute then body |
| 15 | + execute_command_list(&if_stmt.then_body, context) |
| 16 | + } else { |
| 17 | + // Check elif clauses |
| 18 | + for elif in &if_stmt.elif_clauses { |
| 19 | + let elif_result = execute_complete_command(&elif.condition, context)?; |
| 20 | + if elif_result.success() { |
| 21 | + return execute_command_list(&elif.then_body, context); |
| 22 | + } |
| 23 | + } |
| 24 | + |
| 25 | + // No elif matched, execute else body if present |
| 26 | + if let Some(else_body) = &if_stmt.else_body { |
| 27 | + execute_command_list(else_body, context) |
| 28 | + } else { |
| 29 | + // No else clause, return success (standard shell behavior) |
| 30 | + Ok(crate::command::success_result()) |
| 31 | + } |
| 32 | + } |
| 33 | +} |
| 34 | + |
| 35 | +/// Execute a while loop |
| 36 | +pub fn execute_while( |
| 37 | + while_stmt: &WhileStatement, |
| 38 | + context: &mut Context, |
| 39 | +) -> Result<ExecutionResult, PipelineError> { |
| 40 | + let mut last_result = crate::command::success_result(); |
| 41 | + |
| 42 | + loop { |
| 43 | + // Execute the condition |
| 44 | + let condition_result = execute_complete_command(&while_stmt.condition, context)?; |
| 45 | + |
| 46 | + if !condition_result.success() { |
| 47 | + // Condition failed, exit loop |
| 48 | + break; |
| 49 | + } |
| 50 | + |
| 51 | + // Execute the loop body |
| 52 | + last_result = execute_command_list(&while_stmt.body, context)?; |
| 53 | + } |
| 54 | + |
| 55 | + Ok(last_result) |
| 56 | +} |
| 57 | + |
| 58 | +/// Execute a for loop |
| 59 | +pub fn execute_for( |
| 60 | + for_stmt: &ForStatement, |
| 61 | + context: &mut Context, |
| 62 | +) -> Result<ExecutionResult, PipelineError> { |
| 63 | + use rush_expand::expand_word; |
| 64 | + |
| 65 | + let mut last_result = crate::command::success_result(); |
| 66 | + |
| 67 | + // Expand all the words in the list |
| 68 | + let mut values = Vec::new(); |
| 69 | + for word in &for_stmt.words { |
| 70 | + let expanded = expand_word(word, context) |
| 71 | + .map_err(|e| PipelineError::ExpansionError(e.to_string()))?; |
| 72 | + values.push(expanded); |
| 73 | + } |
| 74 | + |
| 75 | + // Execute the loop body for each value |
| 76 | + for value in values { |
| 77 | + // Set the loop variable |
| 78 | + context.set_var(&for_stmt.var_name, &value); |
| 79 | + |
| 80 | + // Execute the loop body |
| 81 | + last_result = execute_command_list(&for_stmt.body, context)?; |
| 82 | + } |
| 83 | + |
| 84 | + Ok(last_result) |
| 85 | +} |
| 86 | + |
| 87 | +/// Execute a case statement |
| 88 | +pub fn execute_case( |
| 89 | + case_stmt: &CaseStatement, |
| 90 | + context: &mut Context, |
| 91 | +) -> Result<ExecutionResult, PipelineError> { |
| 92 | + use rush_expand::expand_word; |
| 93 | + |
| 94 | + // Expand the word to match against |
| 95 | + let word_value = expand_word(&case_stmt.word, context) |
| 96 | + .map_err(|e| PipelineError::ExpansionError(e.to_string()))?; |
| 97 | + |
| 98 | + // Try each case clause |
| 99 | + for clause in &case_stmt.clauses { |
| 100 | + // Check if any pattern matches |
| 101 | + for pattern in &clause.patterns { |
| 102 | + let pattern_value = expand_word(pattern, context) |
| 103 | + .map_err(|e| PipelineError::ExpansionError(e.to_string()))?; |
| 104 | + |
| 105 | + // TODO: Implement glob pattern matching |
| 106 | + // For now, just do exact string matching |
| 107 | + if word_value == pattern_value { |
| 108 | + // Pattern matched, execute this clause's commands |
| 109 | + return execute_command_list(&clause.body, context); |
| 110 | + } |
| 111 | + } |
| 112 | + } |
| 113 | + |
| 114 | + // No clause matched, return success (standard shell behavior) |
| 115 | + Ok(crate::command::success_result()) |
| 116 | +} |
| 117 | + |
| 118 | +/// Execute a complete command (helper for recursive execution) |
| 119 | +fn execute_complete_command( |
| 120 | + cmd: &CompleteCommand, |
| 121 | + context: &mut Context, |
| 122 | +) -> Result<ExecutionResult, PipelineError> { |
| 123 | + match cmd { |
| 124 | + CompleteCommand::Simple(simple_cmd) => { |
| 125 | + Ok(crate::execute_simple_with_redirects(simple_cmd, context, false)?) |
| 126 | + } |
| 127 | + CompleteCommand::Pipeline(pipeline) => { |
| 128 | + crate::execute_pipeline(pipeline, context) |
| 129 | + } |
| 130 | + CompleteCommand::AndOrList(and_or_list) => { |
| 131 | + crate::execute_and_or_list(and_or_list, context) |
| 132 | + } |
| 133 | + CompleteCommand::If(if_stmt) => { |
| 134 | + execute_if(if_stmt, context) |
| 135 | + } |
| 136 | + CompleteCommand::While(while_stmt) => { |
| 137 | + execute_while(while_stmt, context) |
| 138 | + } |
| 139 | + CompleteCommand::For(for_stmt) => { |
| 140 | + execute_for(for_stmt, context) |
| 141 | + } |
| 142 | + CompleteCommand::Case(case_stmt) => { |
| 143 | + execute_case(case_stmt, context) |
| 144 | + } |
| 145 | + } |
| 146 | +} |
| 147 | + |
| 148 | +/// Execute a list of commands |
| 149 | +fn execute_command_list( |
| 150 | + commands: &[CompleteCommand], |
| 151 | + context: &mut Context, |
| 152 | +) -> Result<ExecutionResult, PipelineError> { |
| 153 | + let mut last_result = crate::command::success_result(); |
| 154 | + |
| 155 | + for cmd in commands { |
| 156 | + last_result = execute_complete_command(cmd, context)?; |
| 157 | + context.set_exit_status(last_result.exit_code()); |
| 158 | + } |
| 159 | + |
| 160 | + Ok(last_result) |
| 161 | +} |
