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Original file line number | Diff line number | Diff line change |
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import * as fs from "fs"; | ||
import path from "path"; | ||
import { execSync } from "child_process"; | ||
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interface LetterGroup { | ||
offset: number; | ||
length: number; | ||
packages: string[]; | ||
} | ||
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// Read and parse input file | ||
const content = fs.readFileSync(path.join(__dirname, "..", "src", "cli", "add_completions.txt"), "utf8"); | ||
const packages = content | ||
.split("\n") | ||
.map(line => line.trim()) | ||
.filter(line => line.length > 0) | ||
.sort(); | ||
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// Group packages by first letter | ||
const letterGroups = new Map<string, LetterGroup>(); | ||
let currentOffset = 0; | ||
let maxListSize = 0; | ||
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for (const pkg of packages) { | ||
if (pkg.length === 0) continue; | ||
const firstLetter = pkg[0].toLowerCase(); | ||
if (!letterGroups.has(firstLetter)) { | ||
letterGroups.set(firstLetter, { | ||
offset: currentOffset, | ||
length: 0, | ||
packages: [], | ||
}); | ||
} | ||
const group = letterGroups.get(firstLetter)!; | ||
group.packages.push(pkg); | ||
group.length++; | ||
maxListSize = Math.max(maxListSize, group.length); | ||
} | ||
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// Helper to ensure temp dir exists | ||
const tmpDir = path.join(__dirname, "tmp"); | ||
if (!fs.existsSync(tmpDir)) { | ||
fs.mkdirSync(tmpDir); | ||
} | ||
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// Create a single buffer with all package data | ||
const dataChunks: Buffer[] = []; | ||
let totalUncompressed = 0; | ||
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// Store total package count first | ||
const totalCountBuf = Buffer.alloc(4); | ||
totalCountBuf.writeUInt32LE(packages.length, 0); | ||
dataChunks.push(totalCountBuf); | ||
totalUncompressed += 4; | ||
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// Then all packages with length prefixes | ||
for (const pkg of packages) { | ||
const lenBuf = Buffer.alloc(2); | ||
lenBuf.writeUInt16LE(pkg.length, 0); | ||
dataChunks.push(lenBuf); | ||
dataChunks.push(Buffer.from(pkg, "utf8")); | ||
totalUncompressed += 2 + pkg.length; | ||
} | ||
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const uncompressedData = Buffer.concat(dataChunks); | ||
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// Write to temp file and compress with zstd | ||
const uncompressedPath = path.join(tmpDir, "packages.bin"); | ||
const compressedPath = path.join(tmpDir, "packages.bin.zst"); | ||
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fs.writeFileSync(uncompressedPath, uncompressedData); | ||
execSync(`zstd -1 --rm -f "${uncompressedPath}" -o "${compressedPath}"`); | ||
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// Read back compressed data | ||
const compressedData = fs.readFileSync(compressedPath); | ||
fs.unlinkSync(compressedPath); | ||
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// Calculate compression ratio | ||
const totalCompressed = compressedData.length; | ||
const ratio = ((totalCompressed / totalUncompressed) * 100).toFixed(1); | ||
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console.log("\nCompression statistics:"); | ||
console.log(`Uncompressed size: ${totalUncompressed} bytes`); | ||
console.log(`Compressed size: ${totalCompressed} bytes`); | ||
console.log(`Compression ratio: ${ratio}%`); | ||
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// Generate Zig code | ||
const chunks: string[] = []; | ||
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// Header with comments and imports | ||
chunks.push(`// Auto-generated file. Do not edit. | ||
// To regenerate this file, run: | ||
// | ||
// bun misctools/generate-add-completions.ts | ||
// | ||
// If you update add_completions.txt, then you should run this script again. | ||
// | ||
// This used to be a comptime block, but it made the build too slow. | ||
// Compressing the completions list saves about 100 KB of binary size. | ||
const std = @import("std"); | ||
const bun = @import("root").bun; | ||
const zstd = bun.zstd; | ||
const Environment = bun.Environment; | ||
pub const FirstLetter = enum(u8) { | ||
a = 'a', | ||
b = 'b', | ||
c = 'c', | ||
d = 'd', | ||
e = 'e', | ||
f = 'f', | ||
g = 'g', | ||
h = 'h', | ||
i = 'i', | ||
j = 'j', | ||
k = 'k', | ||
l = 'l', | ||
m = 'm', | ||
n = 'n', | ||
o = 'o', | ||
p = 'p', | ||
q = 'q', | ||
r = 'r', | ||
s = 's', | ||
t = 't', | ||
u = 'u', | ||
v = 'v', | ||
w = 'w', | ||
x = 'x', | ||
y = 'y', | ||
z = 'z', | ||
};`); | ||
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// Add the compressed data | ||
chunks.push(`const compressed_data = [_]u8{${[...compressedData].join(",")}};`); | ||
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// Add uncompressed size constant | ||
chunks.push(`const uncompressed_size: usize = ${totalUncompressed};`); | ||
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// Generate index entries | ||
const indexEntries: string[] = []; | ||
let offset = 0; | ||
for (const letter of "abcdefghijklmnopqrstuvwxyz") { | ||
const group = letterGroups.get(letter); | ||
if (group) { | ||
indexEntries.push(` .${letter} = .{ .offset = ${offset}, .length = ${group.length} }`); | ||
offset += group.length; | ||
} else { | ||
indexEntries.push(` .${letter} = .{ .offset = ${offset}, .length = 0 }`); | ||
} | ||
} | ||
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// Generate index type and instance | ||
chunks.push(`pub const IndexEntry = struct { | ||
offset: usize, | ||
length: usize, | ||
}; | ||
pub const Index = std.EnumArray(FirstLetter, IndexEntry); | ||
pub const index = Index.init(.{ | ||
${indexEntries.join(",\n")} | ||
});`); | ||
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// Generate the decompression and access function | ||
chunks.push(`var decompressed_data: ?[]u8 = null; | ||
var packages_list: ?[][]const u8 = null; | ||
pub fn init(allocator: std.mem.Allocator) !void { | ||
// Decompress data | ||
var data = try allocator.alloc(u8, uncompressed_size); | ||
errdefer allocator.free(data); | ||
const result = zstd.decompress(data, &compressed_data); | ||
decompressed_data = data[0..result.success]; | ||
// Parse package list | ||
const total_count = std.mem.readInt(u32, data[0..4], .little); | ||
var packages = try allocator.alloc([]const u8, total_count); | ||
errdefer allocator.free(packages); | ||
var pos: usize = 4; | ||
var i: usize = 0; | ||
while (i < total_count) : (i += 1) { | ||
const len = std.mem.readInt(u16, data[pos..][0..2], .little); | ||
pos += 2; | ||
packages[i] = data[pos..pos + len]; | ||
pos += len; | ||
} | ||
packages_list = packages; | ||
} | ||
pub fn deinit(allocator: std.mem.Allocator) void { | ||
if (packages_list) |pkgs| { | ||
allocator.free(pkgs); | ||
packages_list = null; | ||
} | ||
if (decompressed_data) |data| { | ||
allocator.free(data); | ||
decompressed_data = null; | ||
} | ||
} | ||
pub fn getPackages(letter: FirstLetter) []const []const u8 { | ||
const entry = index.get(letter); | ||
if (entry.length == 0) return &[_][]const u8{}; | ||
return packages_list.?[entry.offset..entry.offset + entry.length]; | ||
}`); | ||
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// Add biggest_list constant | ||
chunks.push(`pub const biggest_list: usize = ${maxListSize};`); | ||
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// Write the output | ||
let zigCode = chunks.join("\n\n"); | ||
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zigCode = execSync("zig fmt --stdin", { | ||
input: zigCode, | ||
encoding: "utf8", | ||
}).toString(); | ||
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fs.writeFileSync(path.join(__dirname, "..", "src", "cli", "add_completions.zig"), zigCode); | ||
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// Clean up temp dir | ||
try { | ||
fs.rmdirSync(tmpDir); | ||
} catch {} | ||
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console.log(`\nGenerated Zig completions for ${packages.length} packages`); |
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