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apply_patch.ts
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281 lines (245 loc) · 9.38 KB
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import z from "zod"
import * as path from "path"
import * as fs from "fs/promises"
import { Tool } from "./tool"
import { Bus } from "../bus"
import { FileWatcher } from "../file/watcher"
import { Instance } from "../project/instance"
import { Patch } from "../patch"
import { createTwoFilesPatch, diffLines } from "diff"
import { assertExternalDirectory } from "./external-directory"
import { trimDiff } from "./edit"
import { LSP } from "../lsp"
import { Filesystem } from "../util/filesystem"
import DESCRIPTION from "./apply_patch.txt"
import { File } from "../file"
const PatchParams = z.object({
patchText: z.string().describe("The full patch text that describes all changes to be made"),
})
export const ApplyPatchTool = Tool.define("apply_patch", {
description: DESCRIPTION,
parameters: PatchParams,
async execute(params, ctx) {
if (!params.patchText) {
throw new Error("patchText is required")
}
// Parse the patch to get hunks
let hunks: Patch.Hunk[]
try {
const parseResult = Patch.parsePatch(params.patchText)
hunks = parseResult.hunks
} catch (error) {
throw new Error(`apply_patch verification failed: ${error}`)
}
if (hunks.length === 0) {
const normalized = params.patchText.replace(/\r\n/g, "\n").replace(/\r/g, "\n").trim()
if (normalized === "*** Begin Patch\n*** End Patch") {
throw new Error("patch rejected: empty patch")
}
throw new Error("apply_patch verification failed: no hunks found")
}
// Validate file paths and check permissions
const fileChanges: Array<{
filePath: string
oldContent: string
newContent: string
type: "add" | "update" | "delete" | "move"
movePath?: string
diff: string
additions: number
deletions: number
}> = []
let totalDiff = ""
for (const hunk of hunks) {
const filePath = path.resolve(Instance.directory, hunk.path)
await assertExternalDirectory(ctx, filePath)
switch (hunk.type) {
case "add": {
const oldContent = ""
const newContent =
hunk.contents.length === 0 || hunk.contents.endsWith("\n") ? hunk.contents : `${hunk.contents}\n`
const diff = trimDiff(createTwoFilesPatch(filePath, filePath, oldContent, newContent))
let additions = 0
let deletions = 0
for (const change of diffLines(oldContent, newContent)) {
if (change.added) additions += change.count || 0
if (change.removed) deletions += change.count || 0
}
fileChanges.push({
filePath,
oldContent,
newContent,
type: "add",
diff,
additions,
deletions,
})
totalDiff += diff + "\n"
break
}
case "update": {
// Check if file exists for update
const stats = await fs.stat(filePath).catch(() => null)
if (!stats || stats.isDirectory()) {
throw new Error(`apply_patch verification failed: Failed to read file to update: ${filePath}`)
}
const oldContent = await fs.readFile(filePath, "utf-8")
let newContent = oldContent
// Apply the update chunks to get new content
try {
const fileUpdate = Patch.deriveNewContentsFromChunks(filePath, hunk.chunks)
newContent = fileUpdate.content
} catch (error) {
throw new Error(`apply_patch verification failed: ${error}`)
}
const diff = trimDiff(createTwoFilesPatch(filePath, filePath, oldContent, newContent))
let additions = 0
let deletions = 0
for (const change of diffLines(oldContent, newContent)) {
if (change.added) additions += change.count || 0
if (change.removed) deletions += change.count || 0
}
const movePath = hunk.move_path ? path.resolve(Instance.directory, hunk.move_path) : undefined
await assertExternalDirectory(ctx, movePath)
fileChanges.push({
filePath,
oldContent,
newContent,
type: hunk.move_path ? "move" : "update",
movePath,
diff,
additions,
deletions,
})
totalDiff += diff + "\n"
break
}
case "delete": {
const contentToDelete = await fs.readFile(filePath, "utf-8").catch((error) => {
throw new Error(`apply_patch verification failed: ${error}`)
})
const deleteDiff = trimDiff(createTwoFilesPatch(filePath, filePath, contentToDelete, ""))
const deletions = contentToDelete.split("\n").length
fileChanges.push({
filePath,
oldContent: contentToDelete,
newContent: "",
type: "delete",
diff: deleteDiff,
additions: 0,
deletions,
})
totalDiff += deleteDiff + "\n"
break
}
}
}
// Build per-file metadata for UI rendering (used for both permission and result)
const files = fileChanges.map((change) => ({
filePath: change.filePath,
relativePath: path.relative(Instance.worktree, change.movePath ?? change.filePath).replaceAll("\\", "/"),
type: change.type,
diff: change.diff,
before: change.oldContent,
after: change.newContent,
additions: change.additions,
deletions: change.deletions,
movePath: change.movePath,
}))
// Check permissions if needed
const relativePaths = fileChanges.map((c) => path.relative(Instance.worktree, c.filePath).replaceAll("\\", "/"))
await ctx.ask({
permission: "edit",
patterns: relativePaths,
always: ["*"],
metadata: {
filepath: relativePaths.join(", "),
diff: totalDiff,
files,
},
})
// Apply the changes
const updates: Array<{ file: string; event: "add" | "change" | "unlink" }> = []
for (const change of fileChanges) {
const edited = change.type === "delete" ? undefined : (change.movePath ?? change.filePath)
switch (change.type) {
case "add":
// Create parent directories (recursive: true is safe on existing/root dirs)
await fs.mkdir(path.dirname(change.filePath), { recursive: true })
await fs.writeFile(change.filePath, change.newContent, "utf-8")
updates.push({ file: change.filePath, event: "add" })
break
case "update":
await fs.writeFile(change.filePath, change.newContent, "utf-8")
updates.push({ file: change.filePath, event: "change" })
break
case "move":
if (change.movePath) {
// Create parent directories (recursive: true is safe on existing/root dirs)
await fs.mkdir(path.dirname(change.movePath), { recursive: true })
await fs.writeFile(change.movePath, change.newContent, "utf-8")
await fs.unlink(change.filePath)
updates.push({ file: change.filePath, event: "unlink" })
updates.push({ file: change.movePath, event: "add" })
}
break
case "delete":
await fs.unlink(change.filePath)
updates.push({ file: change.filePath, event: "unlink" })
break
}
if (edited) {
await Bus.publish(File.Event.Edited, {
file: edited,
})
}
}
// Publish file change events
for (const update of updates) {
await Bus.publish(FileWatcher.Event.Updated, update)
}
// Notify LSP of file changes and collect diagnostics
for (const change of fileChanges) {
if (change.type === "delete") continue
const target = change.movePath ?? change.filePath
await LSP.touchFile(target, true)
}
const diagnostics = await LSP.diagnostics()
// Generate output summary
const summaryLines = fileChanges.map((change) => {
if (change.type === "add") {
return `A ${path.relative(Instance.worktree, change.filePath).replaceAll("\\", "/")}`
}
if (change.type === "delete") {
return `D ${path.relative(Instance.worktree, change.filePath).replaceAll("\\", "/")}`
}
const target = change.movePath ?? change.filePath
return `M ${path.relative(Instance.worktree, target).replaceAll("\\", "/")}`
})
let output = `Success. Updated the following files:\n${summaryLines.join("\n")}`
// Report LSP errors for changed files
const MAX_DIAGNOSTICS_PER_FILE = 20
for (const change of fileChanges) {
if (change.type === "delete") continue
const target = change.movePath ?? change.filePath
const normalized = Filesystem.normalizePath(target)
const issues = diagnostics[normalized] ?? []
const errors = issues.filter((item) => item.severity === 1)
if (errors.length > 0) {
const limited = errors.slice(0, MAX_DIAGNOSTICS_PER_FILE)
const suffix =
errors.length > MAX_DIAGNOSTICS_PER_FILE ? `\n... and ${errors.length - MAX_DIAGNOSTICS_PER_FILE} more` : ""
output += `\n\nLSP errors detected in ${path.relative(Instance.worktree, target).replaceAll("\\", "/")}, please fix:\n<diagnostics file="${target}">\n${limited.map(LSP.Diagnostic.pretty).join("\n")}${suffix}\n</diagnostics>`
}
}
return {
title: output,
metadata: {
diff: totalDiff,
files,
diagnostics,
},
output,
}
},
})