drop rbtag and use our own hand-rolled implementation

because we need to update build timestamp each time anything related to
rendering is changed. The rbtag crate only supports git commit times.

Also, reproducible build isn't exactly a goal of this project.

Cargo.lock

@@ -133,7 +133,7 @@ checksum = "030a733c8287d6213886dd487564ff5c8f6aae10278b3588ed177f9d18f8d231"
 dependencies = [
  "proc-macro2 1.0.10",
  "quote 1.0.3",
- "syn 1.0.17",
+ "syn",
  "synstructure",
 ]
 
@@ -205,7 +205,7 @@ dependencies = [
  "proc-macro-hack",
  "proc-macro2 1.0.10",
  "quote 1.0.3",
- "syn 1.0.17",
+ "syn",
 ]
 
 [[package]]
@@ -317,7 +317,6 @@ dependencies = [
  "lazy_static",
  "mime_guess",
  "pulldown-cmark",
- "rbtag",
  "serde",
  "serde_json",
  "wasm-bindgen",
@@ -356,7 +355,7 @@ dependencies = [
  "pest_meta",
  "proc-macro2 1.0.10",
  "quote 1.0.3",
- "syn 1.0.17",
+ "syn",
 ]
 
 [[package]]
@@ -429,26 +428,6 @@ dependencies = [
  "proc-macro2 1.0.10",
 ]
 
-[[package]]
-name = "rbtag"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "72c64936fcc0b811890a9d90020f3df5cec9c604efde88af7db6a35d365132a3"
-dependencies = [
- "rbtag_derive",
-]
-
-[[package]]
-name = "rbtag_derive"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b75511b710ccca8adbb211e04763bd8c78fed585b0ec188a20ed9b0dd95567c4"
-dependencies = [
- "proc-macro2 0.4.30",
- "quote 0.6.13",
- "syn 0.15.44",
-]
-
 [[package]]
 name = "redox_syscall"
 version = "0.1.56"
@@ -490,7 +469,7 @@ checksum = "9e549e3abf4fb8621bd1609f11dfc9f5e50320802273b12f3811a67e6716ea6c"
 dependencies = [
  "proc-macro2 1.0.10",
  "quote 1.0.3",
- "syn 1.0.17",
+ "syn",
 ]
 
 [[package]]
@@ -516,17 +495,6 @@ dependencies = [
  "opaque-debug",
 ]
 
-[[package]]
-name = "syn"
-version = "0.15.44"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ca4b3b69a77cbe1ffc9e198781b7acb0c7365a883670e8f1c1bc66fba79a5c5"
-dependencies = [
- "proc-macro2 0.4.30",
- "quote 0.6.13",
- "unicode-xid 0.1.0",
-]
-
 [[package]]
 name = "syn"
 version = "1.0.17"
@@ -546,7 +514,7 @@ checksum = "67656ea1dc1b41b1451851562ea232ec2e5a80242139f7e679ceccfb5d61f545"
 dependencies = [
  "proc-macro2 1.0.10",
  "quote 1.0.3",
- "syn 1.0.17",
+ "syn",
  "unicode-xid 0.2.0",
 ]
 
@@ -621,7 +589,7 @@ dependencies = [
  "log",
  "proc-macro2 1.0.10",
  "quote 1.0.3",
- "syn 1.0.17",
+ "syn",
  "wasm-bindgen-shared",
 ]
 
@@ -668,7 +636,7 @@ checksum = "d68a5b36eef1be7868f668632863292e37739656a80fc4b9acec7b0bd35a4931"
 dependencies = [
  "proc-macro2 1.0.10",
  "quote 1.0.3",
- "syn 1.0.17",
+ "syn",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]

Cargo.toml

@@ -27,7 +27,6 @@ include_dir = "0.5"
 js-sys = "0.3"
 mime_guess = "2.0"
 pulldown-cmark = { version = "0.7", default-features = false }
-rbtag = "0.3"
 serde = { version = "1.0", features = [ "derive" ] }
 serde_json = "1.0"
 wasm-bindgen = "0.2"

build.rs

@@ -1,17 +1,31 @@
 extern crate serde_json;
 
 use std::io::prelude::*;
+use std::time::*;
 
 fn main() {
     println!("cargo:rerun-if-changed=config.json");
+    println!("cargo:rerun-if-changed=src");
+    println!("cargo:rerun-if-changed=Cargo.toml");
     // Load theme name from config.json and output code to load the theme via include_dir!
     let config: serde_json::Value = 
         serde_json::from_str(&std::fs::read_to_string("./config.json").unwrap()).unwrap();
 
+    generate_build_timestamp();
     generate_theme_loader(&config);
     generate_hljs_loader(&config);
 }
 
+fn generate_build_timestamp() {
+    let build_time = format!(
+        "pub const BUILD_TIMESTAMP: u64 = {};",
+        SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap().as_secs());
+    let out_path = std::path::PathBuf::from(std::env::var("OUT_DIR").unwrap());
+    let mut out_file = std::fs::File::create(out_path.join("build_timestamp.rs")).unwrap();
+    out_file.write(build_time.as_bytes()).unwrap();
+    out_file.sync_data().unwrap();
+}
+
 fn generate_theme_loader(config: &serde_json::Value) {
     let theme_name = match config.get("theme") {
         Some(name) => name,
@@ -25,8 +39,6 @@ fn generate_theme_loader(config: &serde_json::Value) {
 }
 
 fn generate_hljs_loader(config: &serde_json::Value) {
-    println!("cargo:rerun-if-changed=src/hljs_tpl.rs");
-    
     let highlight_lang = match config.get("hljs") {
         Some(val) => val,
         None => panic!("Please specify what language for hljs to support in `config.json` with `hljs`")

src/blog.rs

@@ -7,7 +7,6 @@
 use crate::store;
 use crate::utils::*;
 use pulldown_cmark::*;
-use rbtag::BuildDateTime;
 use serde::{Serialize, Deserialize};
 use std::vec::Vec;
 
@@ -120,7 +119,7 @@ lazy_static! {
     // Whenever this is changed, all cache will be invalided
     // Use build timestamp string
     static ref CACHE_VERSION: String = {
-        format!("{}", BuildTag{}.get_build_timestamp())
+        format!("{}", BUILD_TIMESTAMP)
     };
 }
 

src/render.rs

@@ -6,7 +6,6 @@ use chrono::NaiveDateTime;
 use handlebars::Handlebars;
 use include_dir::{include_dir, Dir};
 use js_sys::{Date, Uint8Array};
-use rbtag::BuildDateTime;
 use serde::Serialize;
 use std::vec::Vec;
 use web_sys::*;
@@ -111,7 +110,7 @@ lazy_static! {
 }
 
 handlebars_helper!(cur_year: | | Date::new_0().get_full_year());
-handlebars_helper!(build_num: | | BuildTag{}.get_build_timestamp());
+handlebars_helper!(build_num: | | BUILD_TIMESTAMP);
 handlebars_helper!(format_date: |date: u64, format: str| {
     NaiveDateTime::from_timestamp(date as i64, 0).format(format).to_string()
 });

src/utils.rs

@@ -1,7 +1,6 @@
 use cfg_if::cfg_if;
 use serde::Deserialize;
 use js_sys::*;
-use rbtag::BuildDateTime;
 use wasm_bindgen::prelude::*;
 use wasm_bindgen_futures::*;
 use web_sys::*;
@@ -158,5 +157,4 @@ pub struct Config {
     pub posts_per_page: usize
 }
 
-#[derive(BuildDateTime)]
-pub struct BuildTag;
+include!(concat!(env!("OUT_DIR"), "/build_timestamp.rs"));