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add $. w/ shrimp runtime info

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This commit is contained in:
Chris Wanstrath 2025-11-10 00:53:16 -08:00
parent 6ca64d362c
commit 36e8a88aae
11 changed files with 135 additions and 62 deletions
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3
bin/repl
View File

@ -7,6 +7,9 @@ import * as readline from 'readline'
import { readFileSync, writeFileSync } from 'fs' import { readFileSync, writeFileSync } from 'fs'
import { basename } from 'path' import { basename } from 'path'
globals.$.script.name = '(repl)'
globals.$.script.path = '(repl)'
async function repl() { async function repl() {
const commands = ['/clear', '/reset', '/vars', '/funcs', '/history', '/bytecode', '/exit', '/save', '/quit'] const commands = ['/clear', '/reset', '/vars', '/funcs', '/history', '/bytecode', '/exit', '/save', '/quit']

8
bin/shrimp
View File

@ -1,13 +1,17 @@
#!/usr/bin/env bun #!/usr/bin/env bun
import { colors } from '../src/prelude' import { colors, globals as prelude } from '../src/prelude'
import { treeToString } from '../src/utils/tree' import { treeToString } from '../src/utils/tree'
import { runCode, runFile, compileFile, parseCode } from '../src' import { runCode, runFile, compileFile, parseCode } from '../src'
import { resolve } from 'path'
import { bytecodeToString } from 'reefvm' import { bytecodeToString } from 'reefvm'
import { readFileSync } from 'fs' import { readFileSync } from 'fs'
import { spawn } from 'child_process' import { spawn } from 'child_process'
import { join } from 'path' import { join } from 'path'
const idx = Bun.argv.indexOf('--')
prelude.$.args = idx >= 0 ? Bun.argv.slice(idx + 1) : []
function showHelp() { function showHelp() {
console.log(`${colors.bright}${colors.magenta}🦐 Shrimp${colors.reset} is a scripting language in a shell. console.log(`${colors.bright}${colors.magenta}🦐 Shrimp${colors.reset} is a scripting language in a shell.
@ -149,10 +153,12 @@ async function main() {
console.log(`${colors.bright}usage: shrimp run <file>${colors.reset}`) console.log(`${colors.bright}usage: shrimp run <file>${colors.reset}`)
process.exit(1) process.exit(1)
} }
prelude.$.script.path = resolve(file)
await runFile(file) await runFile(file)
return return
} }
prelude.$.script.path = resolve(command)
await runFile(command) await runFile(command)
} }

2
src/compiler/utils.ts
View File

@ -293,7 +293,7 @@ export const getDotGetParts = (node: SyntaxNode, input: string) => {
) )
} }
if (object.type.id !== terms.IdentifierBeforeDot) { if (object.type.id !== terms.IdentifierBeforeDot && object.type.id !== terms.Dollar) {
throw new CompilerError( throw new CompilerError(
`DotGet object must be an IdentifierBeforeDot, got ${object.type.name}`, `DotGet object must be an IdentifierBeforeDot, got ${object.type.name}`,
object.from, object.from,

12
src/index.ts
View File

@ -4,7 +4,7 @@ import { type Tree } from '@lezer/common'
import { Compiler } from '#compiler/compiler' import { Compiler } from '#compiler/compiler'
import { parser } from '#parser/shrimp' import { parser } from '#parser/shrimp'
import { globals as parserGlobals, setGlobals as setParserGlobals } from '#parser/tokenizer' import { globals as parserGlobals, setGlobals as setParserGlobals } from '#parser/tokenizer'
import { globals as shrimpGlobals } from '#prelude' import { globals as prelude } from '#prelude'
export { Compiler } from '#compiler/compiler' export { Compiler } from '#compiler/compiler'
export { parser } from '#parser/shrimp' export { parser } from '#parser/shrimp'
@ -19,7 +19,7 @@ export class Shrimp {
constructor(globals?: Record<string, any>) { constructor(globals?: Record<string, any>) {
const emptyBytecode = { instructions: [], constants: [], labels: new Map() } const emptyBytecode = { instructions: [], constants: [], labels: new Map() }
this.vm = new VM(emptyBytecode, Object.assign({}, shrimpGlobals, globals ?? {})) this.vm = new VM(emptyBytecode, Object.assign({}, prelude, globals ?? {}))
this.globals = globals this.globals = globals
} }
@ -53,7 +53,7 @@ export class Shrimp {
let bytecode let bytecode
if (typeof code === 'string') { if (typeof code === 'string') {
const compiler = new Compiler(code, Object.keys(Object.assign({}, shrimpGlobals, this.globals ?? {}, locals ?? {}))) const compiler = new Compiler(code, Object.keys(Object.assign({}, prelude, this.globals ?? {}, locals ?? {})))
bytecode = compiler.bytecode bytecode = compiler.bytecode
} else { } else {
bytecode = code bytecode = code
@ -79,7 +79,7 @@ export async function runCode(code: string, globals?: Record<string, any>): Prom
} }
export async function runBytecode(bytecode: Bytecode, globals?: Record<string, any>): Promise<any> { export async function runBytecode(bytecode: Bytecode, globals?: Record<string, any>): Promise<any> {
const vm = new VM(bytecode, Object.assign({}, shrimpGlobals, globals)) const vm = new VM(bytecode, Object.assign({}, prelude, globals))
await vm.run() await vm.run()
return vm.stack.length ? fromValue(vm.stack[vm.stack.length - 1]!, vm) : null return vm.stack.length ? fromValue(vm.stack[vm.stack.length - 1]!, vm) : null
} }
@ -90,7 +90,7 @@ export function compileFile(path: string, globals?: Record<string, any>): Byteco
} }
export function compileCode(code: string, globals?: Record<string, any>): Bytecode { export function compileCode(code: string, globals?: Record<string, any>): Bytecode {
const globalNames = [...Object.keys(shrimpGlobals), ...(globals ? Object.keys(globals) : [])] const globalNames = [...Object.keys(prelude), ...(globals ? Object.keys(globals) : [])]
const compiler = new Compiler(code, globalNames) const compiler = new Compiler(code, globalNames)
return compiler.bytecode return compiler.bytecode
} }
@ -102,7 +102,7 @@ export function parseFile(path: string, globals?: Record<string, any>): Tree {
export function parseCode(code: string, globals?: Record<string, any>): Tree { export function parseCode(code: string, globals?: Record<string, any>): Tree {
const oldGlobals = [...parserGlobals] const oldGlobals = [...parserGlobals]
const globalNames = [...Object.keys(shrimpGlobals), ...(globals ? Object.keys(globals) : [])] const globalNames = [...Object.keys(prelude), ...(globals ? Object.keys(globals) : [])]
setParserGlobals(globalNames) setParserGlobals(globalNames)
const result = parser.parse(code) const result = parser.parse(code)

6
src/parser/shrimp.grammar
View File

@ -29,6 +29,7 @@
rightParen { ")" } rightParen { ")" }
colon[closedBy="end", @name="colon"] { ":" } colon[closedBy="end", @name="colon"] { ":" }
Underscore { "_" } Underscore { "_" }
Dollar { "$" }
Regex { "//" (![/\\\n[] | "\\" ![\n] | "[" (![\n\\\]] | "\\" ![\n])* "]")+ ("//" $[gimsuy]*)? } // Stolen from the lezer JavaScript grammar Regex { "//" (![/\\\n[] | "\\" ![\n] | "[" (![\n\\\]] | "\\" ![\n])* "]")+ ("//" $[gimsuy]*)? } // Stolen from the lezer JavaScript grammar
"|"[@name=operator] "|"[@name=operator]
} }
@ -239,7 +240,8 @@ expression {
@skip {} { @skip {} {
DotGet { DotGet {
IdentifierBeforeDot dot (DotGet | Number | Identifier | ParenExpr) IdentifierBeforeDot dot (DotGet | Number | Identifier | ParenExpr) |
Dollar dot (DotGet | Number | Identifier | ParenExpr)
} }
String { String {
@ -254,7 +256,7 @@ stringContent {
} }
Interpolation { Interpolation {
"$" Identifier | "$" FunctionCallOrIdentifier |
"$" ParenExpr "$" ParenExpr
} }

69
src/parser/shrimp.terms.ts
View File

@ -37,42 +37,43 @@ export const
Program = 35, Program = 35,
PipeExpr = 36, PipeExpr = 36,
WhileExpr = 38, WhileExpr = 38,
keyword = 83, keyword = 84,
ConditionalOp = 40, ConditionalOp = 40,
ParenExpr = 41, ParenExpr = 41,
FunctionCallWithNewlines = 42, FunctionCallWithNewlines = 42,
DotGet = 43, DotGet = 43,
Number = 44, Number = 44,
PositionalArg = 45, Dollar = 45,
FunctionDef = 46, PositionalArg = 46,
Params = 47, FunctionDef = 47,
NamedParam = 48, Params = 48,
NamedArgPrefix = 49, NamedParam = 49,
String = 50, NamedArgPrefix = 50,
StringFragment = 51, String = 51,
Interpolation = 52, StringFragment = 52,
EscapeSeq = 53, Interpolation = 53,
DoubleQuote = 54, FunctionCallOrIdentifier = 54,
Boolean = 55, EscapeSeq = 55,
Null = 56, DoubleQuote = 56,
colon = 57, Boolean = 57,
CatchExpr = 58, Null = 58,
Block = 60, colon = 59,
FinallyExpr = 61, CatchExpr = 60,
Underscore = 64, Block = 62,
NamedArg = 65, FinallyExpr = 63,
IfExpr = 66, Underscore = 66,
FunctionCall = 68, NamedArg = 67,
ElseIfExpr = 69, IfExpr = 68,
ElseExpr = 71, FunctionCall = 70,
FunctionCallOrIdentifier = 72, ElseIfExpr = 71,
BinOp = 73, ElseExpr = 73,
Regex = 74, BinOp = 74,
Dict = 75, Regex = 75,
Array = 76, Dict = 76,
FunctionCallWithBlock = 77, Array = 77,
TryExpr = 78, FunctionCallWithBlock = 78,
Throw = 80, TryExpr = 79,
Import = 82, Throw = 81,
CompoundAssign = 84, Import = 83,
Assign = 85 CompoundAssign = 85,
Assign = 86

20
src/parser/shrimp.ts
View File

@ -4,24 +4,24 @@ import {operatorTokenizer} from "./operatorTokenizer"
import {tokenizer, specializeKeyword} from "./tokenizer" import {tokenizer, specializeKeyword} from "./tokenizer"
import {trackScope} from "./parserScopeContext" import {trackScope} from "./parserScopeContext"
import {highlighting} from "./highlight" import {highlighting} from "./highlight"
const spec_Identifier = {__proto__:null,while:78, null:112, catch:118, finally:124, end:126, if:134, else:140, try:158, throw:162, import:166} const spec_Identifier = {__proto__:null,while:78, null:116, catch:122, finally:128, end:130, if:138, else:144, try:160, throw:164, import:168}
export const parser = LRParser.deserialize({ export const parser = LRParser.deserialize({
version: 14, version: 14,
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tokenizers: [operatorTokenizer, 1, 2, 3, tokenizer, new LocalTokenGroup("[~RP!O!PU~ZO#`~~", 11)], tokenizers: [operatorTokenizer, 1, 2, 3, tokenizer, new LocalTokenGroup("[~RP!O!PU~ZO#a~~", 11)],
topRules: {"Program":[0,35]}, topRules: {"Program":[0,35]},
specialized: [{term: 28, get: (value: any, stack: any) => (specializeKeyword(value, stack) << 1), external: specializeKeyword},{term: 28, get: (value: keyof typeof spec_Identifier) => spec_Identifier[value] || -1}], specialized: [{term: 28, get: (value: any, stack: any) => (specializeKeyword(value, stack) << 1), external: specializeKeyword},{term: 28, get: (value: keyof typeof spec_Identifier) => spec_Identifier[value] || -1}],
tokenPrec: 2373 tokenPrec: 2428
}) })

9
src/parser/tests/dot-get.test.ts
View File

@ -447,5 +447,14 @@ end`).toMatchTree(`
Number 1 Number 1
Identifier b Identifier b
`) `)
test('parses $.pid just fine', () => {
expect(`$.pid`).toMatchTree(`
FunctionCallOrIdentifier
DotGet
Dollar $
Identifier pid
`)
})
}) })
}) })

9
src/parser/tests/strings.test.ts
View File

@ -8,7 +8,8 @@ describe('string interpolation', () => {
String String
StringFragment ${'hello '} StringFragment ${'hello '}
Interpolation Interpolation
Identifier name FunctionCallOrIdentifier
Identifier name
`) `)
}) })
@ -44,7 +45,8 @@ describe('string interpolation', () => {
String String
StringFragment x/ StringFragment x/
Interpolation Interpolation
Identifier y FunctionCallOrIdentifier
Identifier y
StringFragment /z StringFragment /z
`) `)
}) })
@ -122,7 +124,8 @@ describe('string escape sequences', () => {
String String
StringFragment value: StringFragment value:
Interpolation Interpolation
Identifier x FunctionCallOrIdentifier
Identifier x
EscapeSeq \\n EscapeSeq \\n
`) `)
}) })

16
src/prelude/index.ts
View File

@ -1,5 +1,6 @@
// The prelude creates all the builtin Shrimp functions. // The prelude creates all the builtin Shrimp functions.
import { join, resolve } from 'path'
import { import {
type Value, type VM, toValue, type Value, type VM, toValue,
extractParamInfo, isWrapped, getOriginalFunction, extractParamInfo, isWrapped, getOriginalFunction,
@ -22,6 +23,20 @@ export const globals = {
math, math,
str, str,
// shrimp runtime info
$: {
args: Bun.argv.slice(3),
argv: Bun.argv.slice(1),
env: process.env,
pid: process.pid,
cwd: process.env.PWD,
script: {
name: Bun.argv[2] || '(shrimp)',
path: resolve(join('.', Bun.argv[2] ?? ''))
},
},
// hello // hello
echo: (...args: any[]) => { echo: (...args: any[]) => {
console.log(...args.map(a => { console.log(...args.map(a => {
@ -66,7 +81,6 @@ export const globals = {
}, },
// env // env
args: Bun.argv.slice(1),
exit: (num: number) => process.exit(num ?? 0), exit: (num: number) => process.exit(num ?? 0),
// type predicates // type predicates

43
src/prelude/tests/info.test.ts
View File

@ -80,15 +80,15 @@ describe('introspection', () => {
describe('environment', () => { describe('environment', () => {
test('args is an array', async () => { test('args is an array', async () => {
await expect(`array? args`).toEvaluateTo(true, globals) await expect(`array? $.args`).toEvaluateTo(true, globals)
}) })
test('args can be accessed', async () => { test('args can be accessed', async () => {
await expect(`type args`).toEvaluateTo('array', globals) await expect(`type $.args`).toEvaluateTo('array', globals)
}) })
test('', async () => { test('argv includes more than just the args', async () => {
await expect(`list.first args | str.ends-with? 'shrimp.test.ts'`).toEvaluateTo(true) await expect(`list.first $.argv | str.ends-with? 'shrimp.test.ts'`).toEvaluateTo(true)
}) })
}) })
@ -103,3 +103,38 @@ describe('ref', () => {
expect(`rnd = ref math.random; rnd | type`).toEvaluateTo('number') expect(`rnd = ref math.random; rnd | type`).toEvaluateTo('number')
expect(`rnd = ref math.random; ref rnd | type`).toEvaluateTo('native') expect(`rnd = ref math.random; ref rnd | type`).toEvaluateTo('native')
}) })
describe('$ global dictionary', () => {
test('$.args is an array', async () => {
await expect(`$.args | array?`).toEvaluateTo(true, globals)
})
test('$.args can be accessed', async () => {
await expect(`$.args | type`).toEvaluateTo('array', globals)
})
test('$.script.name is a string', async () => {
await expect(`$.script.name | string?`).toEvaluateTo(true, globals)
})
test('$.script.path is a string', async () => {
await expect(`$.script.path | string?`).toEvaluateTo(true, globals)
})
test('$.env is a dict', async () => {
await expect(`$.env | dict?`).toEvaluateTo(true, globals)
})
test('$.pid is a number', async () => {
await expect(`$.pid | number?`).toEvaluateTo(true, globals)
await expect(`$.pid > 0`).toEvaluateTo(true, globals)
})
test('$.cwd is a string', async () => {
await expect(`$.cwd | string?`).toEvaluateTo(true, globals)
})
test('$.cwd returns current working directory', async () => {
await expect(`$.cwd`).toEvaluateTo(process.cwd(), globals)
})
})