48 lines
1.6 KiB
Zig
48 lines
1.6 KiB
Zig
const std = @import("std");
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/// This script replaces a matching license header from .zig source files in a directory tree
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/// with the `new_header` below.
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const new_header = "";
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pub fn main() !void {
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var progress = std.Progress{};
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const root_node = progress.start("", 0);
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defer root_node.end();
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var arena_allocator = std.heap.ArenaAllocator.init(std.heap.page_allocator);
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const arena = arena_allocator.allocator();
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const args = try std.process.argsAlloc(arena);
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const path_to_walk = args[1];
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const dir = try std.fs.cwd().openDir(path_to_walk, .{ .iterate = true });
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var walker = try dir.walk(arena);
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defer walker.deinit();
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var buffer: [500]u8 = undefined;
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const expected_header = buffer[0..try std.io.getStdIn().readAll(&buffer)];
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while (try walker.next()) |entry| {
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if (!std.mem.endsWith(u8, entry.basename, ".zig"))
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continue;
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var node = root_node.start(entry.basename, 0);
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node.activate();
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defer node.end();
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const source = try dir.readFileAlloc(arena, entry.path, 20 * 1024 * 1024);
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if (!std.mem.startsWith(u8, source, expected_header)) {
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std.debug.print("no match: {s}\n", .{entry.path});
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continue;
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}
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const truncated_source = source[expected_header.len..];
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const new_source = try arena.alloc(u8, truncated_source.len + new_header.len);
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std.mem.copy(u8, new_source, new_header);
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std.mem.copy(u8, new_source[new_header.len..], truncated_source);
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try dir.writeFile(entry.path, new_source);
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}
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}
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