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@@ -1,93 +1,54 @@
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-extern crate protobuf_codegen_pure;
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-use protobuf_codegen_pure::Customize;
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-use std::fs::File;
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-use std::io::prelude::*;
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-
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-mod files;
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+extern crate protobuf_codegen; // Does the business
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+extern crate protobuf_codegen_pure; // Helper function
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-fn main() {
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- let mut changed = false;
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- let mut file = File::open("files.rs").unwrap();
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- let mut f_str = String::new();
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- file.read_to_string(&mut f_str).unwrap();
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- drop(file);
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- for &(path, expected_checksum) in files::FILES {
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- let actual = cksum_file(path).unwrap();
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- if expected_checksum != actual {
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- protobuf_codegen_pure::run(protobuf_codegen_pure::Args {
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- out_dir: "src",
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- input: &[path],
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- includes: &["proto"],
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- customize: Customize { ..Default::default() },
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- }).expect("protoc");
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- let new_checksum = cksum_file(path).unwrap();
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- f_str = f_str.replace(&expected_checksum.to_string(), &new_checksum.to_string());
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- changed = true;
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- }
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- }
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- if changed {
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- // Write new checksums to file
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- let mut file = File::create("files.rs").unwrap();
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- file.write_all(f_str.as_bytes()).unwrap();
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- }
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-}
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+use std::path::Path;
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+use std::fs::{read_to_string, write};
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-fn cksum_file<T: AsRef<std::path::Path>>(path: T) -> std::io::Result<u32> {
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- let mut file = File::open(path)?;
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- let mut contents = Vec::new();
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- file.read_to_end(&mut contents)?;
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+use protobuf_codegen_pure::Customize;
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+use protobuf_codegen_pure::parse_and_typecheck;
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- Ok(cksum(&contents))
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-}
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+fn main() {
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+ let customizations = Customize { ..Default::default() };
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-fn cksum<T: AsRef<[u8]>>(data: T) -> u32 {
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- let data = data.as_ref();
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+ let lib_str = read_to_string("src/lib.rs").unwrap();
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- let mut value = 0u32;
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- for x in data {
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- value = (value << 8) ^ CRC_LOOKUP_ARRAY[(*x as u32 ^ (value >> 24)) as usize];
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- }
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+ // Iterate over the desired module names.
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+ for line in lib_str.lines() {
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+ if !line.starts_with("pub mod ") {
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+ continue;
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+ }
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+ let len = line.len();
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+ let name = &line[8..len-1]; // Remove keywords and semi-colon
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+
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+ // Build the paths to relevant files.
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+ let src = &format!("proto/{}.proto", name);
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+ let dest = &format!("src/{}.rs", name);
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+
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+ // Get the contents of the existing generated file.
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+ let mut existing = "".to_string();
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+ if Path::new(dest).exists() {
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+ // Removing CRLF line endings if present.
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+ existing = read_to_string(dest).unwrap().replace("\r\n", "\n");
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+ }
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- let mut n = data.len();
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- while n != 0 {
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- value = (value << 8) ^ CRC_LOOKUP_ARRAY[((n & 0xFF) as u32 ^ (value >> 24)) as usize];
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- n >>= 8;
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+ println!("Regenerating {} from {}", dest, src);
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+
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+ // Parse the proto files as the protobuf-codegen-pure crate does.
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+ let p = parse_and_typecheck(&["proto"], &[src]).expect("protoc");
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+ // But generate them with the protobuf-codegen crate directly.
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+ // Then we can keep the result in-memory.
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+ let result = protobuf_codegen::gen(
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+ &p.file_descriptors,
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+ &p.relative_paths,
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+ &customizations,
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+ );
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+ // Protoc result as a byte array.
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+ let new = &result.first().unwrap().content;
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+ // Convert to utf8 to compare with existing.
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+ let new = std::str::from_utf8(&new).unwrap();
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+ // Save newly generated file if changed.
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+ if new != existing {
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+ write(dest, &new).unwrap();
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+ }
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}
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-
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- !value
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}
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-
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-static CRC_LOOKUP_ARRAY: &'static [u32] = &[
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- 0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b, 0x1a864db2, 0x1e475005,
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- 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61, 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd,
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- 0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
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- 0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3, 0x709f7b7a, 0x745e66cd,
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- 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039, 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5,
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- 0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
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- 0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb, 0xceb42022, 0xca753d95,
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- 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1, 0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d,
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- 0x34867077, 0x30476dc0, 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
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- 0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca,
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- 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde, 0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02,
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- 0x5e9f46bf, 0x5a5e5b08, 0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
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- 0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692,
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- 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6, 0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a,
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- 0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
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- 0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34, 0xdc3abded, 0xd8fba05a,
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- 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637, 0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb,
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- 0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
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- 0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5, 0x3f9b762c, 0x3b5a6b9b,
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- 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff, 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623,
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- 0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
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- 0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3,
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- 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7, 0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b,
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- 0x9b3660c6, 0x9ff77d71, 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
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- 0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c,
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- 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8, 0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24,
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- 0x119b4be9, 0x155a565e, 0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
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- 0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654,
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- 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0, 0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c,
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- 0xe3a1cbc1, 0xe760d676, 0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
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- 0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662, 0x933eb0bb, 0x97ffad0c,
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- 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668, 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4,
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-];
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Ash