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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| // Token types | ||
| const TOKEN_TYPE = { | ||
| COMMAND: "COMMAND", | ||
| FLAG: "FLAG", | ||
| PIPE: "PIPE", | ||
| SEMICOLON: "SEMICOLON", | ||
| }; | ||
|
|
||
| // Tokenize the input string | ||
| function tokenize(input) { | ||
| const tokens = []; | ||
| // Updated regex to handle semicolons attached to other tokens | ||
| const regex = /(--\w+|-.\w*|"[^"]*"|;|\S+)/g; | ||
| const words = input.match(regex); | ||
|
|
||
| for (let i = 0; i < words.length; i++) { | ||
| let word = words[i]; | ||
|
|
||
| if (word.startsWith("--") || word.startsWith("-")) { | ||
| // Check if the next word is a value for this flag | ||
| if ( | ||
| i + 1 < words.length && | ||
| !words[i + 1].startsWith("--") && | ||
| !words[i + 1].startsWith("-") && | ||
| words[i + 1] !== "|" && | ||
| words[i + 1] !== ";" | ||
| ) { | ||
| let flagValue = words[++i].replace(/"/g, ""); | ||
| // If the flag value ends with a semicolon, separate it | ||
| if (flagValue.endsWith(";")) { | ||
| flagValue = flagValue.slice(0, -1); | ||
| tokens.push({ | ||
| type: TOKEN_TYPE.FLAG, | ||
| value: word, | ||
| flagValue: flagValue, | ||
| }); | ||
| tokens.push({ type: TOKEN_TYPE.SEMICOLON, value: ";" }); | ||
| } else { | ||
| tokens.push({ | ||
| type: TOKEN_TYPE.FLAG, | ||
| value: word, | ||
| flagValue: flagValue, | ||
| }); | ||
| } | ||
| } else { | ||
| tokens.push({ type: TOKEN_TYPE.FLAG, value: word, flagValue: null }); | ||
| } | ||
| } else if (word === "|") { | ||
| tokens.push({ type: TOKEN_TYPE.PIPE, value: word }); | ||
| } else if (word === ";") { | ||
| tokens.push({ type: TOKEN_TYPE.SEMICOLON, value: word }); | ||
| } else { | ||
| tokens.push({ type: TOKEN_TYPE.COMMAND, value: word.replace(/"/g, "") }); | ||
| } | ||
| } | ||
|
|
||
| return tokens; | ||
| } | ||
|
|
||
| // Parse the tokens into a syntax tree | ||
| function parse(tokens) { | ||
| const commands = []; | ||
| let currentCommand = null; | ||
|
|
||
| for (let token of tokens) { | ||
| switch (token.type) { | ||
| case TOKEN_TYPE.COMMAND: | ||
| currentCommand = { | ||
| commandName: token.value, | ||
| commandArguments: {}, | ||
| terminators: [], | ||
| }; | ||
| commands.push(currentCommand); | ||
| break; | ||
| case TOKEN_TYPE.FLAG: | ||
| if (currentCommand) { | ||
| const flagName = token.value.replace(/^-+/,''); | ||
| currentCommand.commandArguments[flagName] = token.flagValue; | ||
| // currentCommand.flags.push({ flag: token.value, value: token.flagValue }); | ||
| } else { | ||
| throw new Error("Flag without command"); | ||
| } | ||
| break; | ||
| case TOKEN_TYPE.PIPE: | ||
| if (currentCommand) { | ||
| currentCommand.terminators.push(token.value); | ||
| } else { | ||
| throw new Error("Pipe without command"); | ||
| } | ||
| currentCommand = null; // Reset current command for the next one | ||
| break; | ||
| case TOKEN_TYPE.SEMICOLON: | ||
| if (currentCommand) { | ||
| currentCommand.terminators.push(token.value); | ||
| } else { | ||
| throw new Error("Semicolon without command"); | ||
| } | ||
| currentCommand = null; // Reset current command for the next one | ||
| break; | ||
| default: | ||
| throw new Error("Unknown token type"); | ||
| } | ||
| } | ||
|
|
||
| return commands; | ||
| } | ||
|
|
||
| export default function main(input) { | ||
| const tokens = tokenize(input); | ||
| const syntaxTree = parse(tokens); | ||
|
|
||
| return syntaxTree; | ||
| } |