From 7a10767fed1f792dddc9a074af95bc9508835999 Mon Sep 17 00:00:00 2001
From: Noah Hellman <noah@hllmn.net>
Date: Tue, 4 Apr 2023 19:27:20 +0200
Subject: [PATCH] jotdown_wasm: display version

mostly useful for the hosted version
---
 Cargo.lock                       | 144 +++++++++++++++++++++++++++++--
 examples/jotdown_wasm/Cargo.toml |   3 +
 examples/jotdown_wasm/Makefile   |   2 +-
 examples/jotdown_wasm/build.rs   |  17 ++++
 examples/jotdown_wasm/demo.html  |  25 ++++--
 examples/jotdown_wasm/src/lib.rs |   6 ++
 6 files changed, 184 insertions(+), 13 deletions(-)
 create mode 100644 examples/jotdown_wasm/build.rs

diff --git a/Cargo.lock b/Cargo.lock
index c85b251..d686cdb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -65,6 +65,15 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"
 
+[[package]]
+name = "cc"
+version = "1.0.79"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50d30906286121d95be3d479533b458f87493b30a4b5f79a607db8f5d11aa91f"
+dependencies = [
+ "jobserver",
+]
+
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -159,6 +168,28 @@ version = "1.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7fcaabb2fef8c910e7f4c7ce9f67a1283a1715879a7c230ca9d6d1ae31f16d91"
 
+[[package]]
+name = "form_urlencoded"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a9c384f161156f5260c24a097c56119f9be8c798586aecc13afbcbe7b7e26bf8"
+dependencies = [
+ "percent-encoding",
+]
+
+[[package]]
+name = "git2"
+version = "0.14.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3826a6e0e2215d7a41c2bfc7c9244123969273f3476b939a226aac0ab56e9e3c"
+dependencies = [
+ "bitflags",
+ "libc",
+ "libgit2-sys",
+ "log",
+ "url",
+]
+
 [[package]]
 name = "half"
 version = "1.8.2"
@@ -186,6 +217,16 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "71a816c97c42258aa5834d07590b718b4c9a598944cd39a52dc25b351185d678"
 
+[[package]]
+name = "idna"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e14ddfc70884202db2244c223200c204c2bda1bc6e0998d11b5e024d657209e6"
+dependencies = [
+ "unicode-bidi",
+ "unicode-normalization",
+]
+
 [[package]]
 name = "indexmap"
 version = "1.9.2"
@@ -211,6 +252,15 @@ version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fad582f4b9e86b6caa621cabeb0963332d92eea04729ab12892c2533951e6440"
 
+[[package]]
+name = "jobserver"
+version = "0.1.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "936cfd212a0155903bcbc060e316fb6cc7cbf2e1907329391ebadc1fe0ce77c2"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "jotdown"
 version = "0.1.0"
@@ -219,6 +269,7 @@ version = "0.1.0"
 name = "jotdown_wasm"
 version = "0.1.0"
 dependencies = [
+ "git2",
  "jotdown",
  "wasm-bindgen",
  "web-sys",
@@ -245,6 +296,30 @@ version = "0.2.139"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "201de327520df007757c1f0adce6e827fe8562fbc28bfd9c15571c66ca1f5f79"
 
+[[package]]
+name = "libgit2-sys"
+version = "0.13.2+1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3a42de9a51a5c12e00fc0e4ca6bc2ea43582fc6418488e8f615e905d886f258b"
+dependencies = [
+ "cc",
+ "libc",
+ "libz-sys",
+ "pkg-config",
+]
+
+[[package]]
+name = "libz-sys"
+version = "1.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9702761c3935f8cc2f101793272e202c72b99da8f4224a19ddcf1279a6450bbf"
+dependencies = [
+ "cc",
+ "libc",
+ "pkg-config",
+ "vcpkg",
+]
+
 [[package]]
 name = "log"
 version = "0.4.17"
@@ -282,19 +357,31 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b7820b9daea5457c9f21c69448905d723fbd21136ccf521748f23fd49e723ee"
 
 [[package]]
-name = "proc-macro2"
-version = "1.0.51"
+name = "percent-encoding"
+version = "2.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5d727cae5b39d21da60fa540906919ad737832fe0b1c165da3a34d6548c849d6"
+checksum = "478c572c3d73181ff3c2539045f6eb99e5491218eae919370993b890cdbdd98e"
+
+[[package]]
+name = "pkg-config"
+version = "0.3.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ac9a59f73473f1b8d852421e59e64809f025994837ef743615c6d0c5b305160"
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.56"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b63bdb0cd06f1f4dedf69b254734f9b45af66e4a031e42a7480257d9898b435"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.23"
+version = "1.0.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8856d8364d252a14d474036ea1358d63c9e6965c8e5c1885c18f73d70bff9c7b"
+checksum = "4424af4bf778aae2051a77b60283332f386554255d722233d09fbfc7e30da2fc"
 dependencies = [
  "proc-macro2",
 ]
@@ -387,12 +474,59 @@ dependencies = [
  "serde_json",
 ]
 
+[[package]]
+name = "tinyvec"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "87cc5ceb3875bb20c2890005a4e226a4651264a5c75edb2421b52861a0a0cb50"
+dependencies = [
+ "tinyvec_macros",
+]
+
+[[package]]
+name = "tinyvec_macros"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
+
+[[package]]
+name = "unicode-bidi"
+version = "0.3.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "92888ba5573ff080736b3648696b70cafad7d250551175acbaa4e0385b3e1460"
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "84a22b9f218b40614adcb3f4ff08b703773ad44fa9423e4e0d346d5db86e4ebc"
 
+[[package]]
+name = "unicode-normalization"
+version = "0.1.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c5713f0fc4b5db668a2ac63cdb7bb4469d8c9fed047b1d0292cc7b0ce2ba921"
+dependencies = [
+ "tinyvec",
+]
+
+[[package]]
+name = "url"
+version = "2.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0d68c799ae75762b8c3fe375feb6600ef5602c883c5d21eb51c09f22b83c4643"
+dependencies = [
+ "form_urlencoded",
+ "idna",
+ "percent-encoding",
+]
+
+[[package]]
+name = "vcpkg"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
+
 [[package]]
 name = "walkdir"
 version = "2.3.2"
diff --git a/examples/jotdown_wasm/Cargo.toml b/examples/jotdown_wasm/Cargo.toml
index 13dc212..307afb1 100644
--- a/examples/jotdown_wasm/Cargo.toml
+++ b/examples/jotdown_wasm/Cargo.toml
@@ -17,3 +17,6 @@ wasm-bindgen = { version = "0.2", default-features = false }
 
 [dependencies.web-sys]
 version = "0.3"
+
+[build-dependencies]
+git2 = { version = "0.14", default-features = false }
diff --git a/examples/jotdown_wasm/Makefile b/examples/jotdown_wasm/Makefile
index d2a2b92..89a7632 100644
--- a/examples/jotdown_wasm/Makefile
+++ b/examples/jotdown_wasm/Makefile
@@ -1,6 +1,6 @@
 WASM=pkg/jotdown_wasm_bg.wasm
 
-SRC=$(shell find src ../../src -name '*.rs')
+SRC=$(shell find . ../../src -name '*.rs')
 
 ${WASM}: ${SRC}
 	wasm-pack build --release --target web
diff --git a/examples/jotdown_wasm/build.rs b/examples/jotdown_wasm/build.rs
new file mode 100644
index 0000000..84d86c0
--- /dev/null
+++ b/examples/jotdown_wasm/build.rs
@@ -0,0 +1,17 @@
+fn get_version() -> String {
+    if let Ok(repo) = git2::Repository::discover(".") {
+        if let Ok(describe) = repo.describe(&git2::DescribeOptions::new()) {
+            if let Ok(format) = describe.format(None) {
+                return format;
+            }
+        }
+    }
+
+    std::env::var("CARGO_PKG_VERSION").unwrap()
+}
+
+fn main() {
+    let out_dir = std::env::var_os("OUT_DIR").unwrap();
+    let dest_path = std::path::Path::new(&out_dir).join("version");
+    std::fs::write(&dest_path, get_version()).unwrap();
+}
diff --git a/examples/jotdown_wasm/demo.html b/examples/jotdown_wasm/demo.html
index a3ad142..ba7679b 100644
--- a/examples/jotdown_wasm/demo.html
+++ b/examples/jotdown_wasm/demo.html
@@ -1,12 +1,16 @@
 <div id="jotdown" style="flex-grow:1;display:flex;flex-direction:column">
   <script type="module">
     import init, {
+        jotdown_version,
         jotdown_render,
         jotdown_parse,
         jotdown_parse_indent,
     } from './pkg/jotdown_wasm.js';
     await init();
 
+    let version = document.getElementById("jotdown-version");
+    version.innerText = "jotdown-" + jotdown_version();
+
     let output = document.getElementById("jotdown-output");
     let input = document.getElementById("jotdown-input");
     let fmt = document.getElementById("jotdown-fmt");
@@ -35,13 +39,20 @@
     // auto focus on input on load
     setTimeout(() => { input.focus(); }, 0);
   </script>
-  <div>
-    <select id="jotdown-fmt">
-      <option value="preview">preview</option>
-      <option value="html">html</option>
-      <option value="events">events</option>
-      <option value="events_indent">events (indented)</option>
-    </select>
+  <div style="display:flex;gap:1rem">
+    <div style="width:50%">
+      <span style="opacity:50%">
+        version: <span id="jotdown-version">(not loaded)</span>
+      </span>
+    </div>
+    <div style="width:50%">
+      <select id="jotdown-fmt">
+        <option value="preview">preview</option>
+        <option value="html">html</option>
+        <option value="events">events</option>
+        <option value="events_indent">events (indented)</option>
+      </select>
+    </div>
   </div>
   <div id="jotdown-panes" style="display:flex;height:100%;gap:1rem">
     <pre id="jotdown-input" contenteditable="true" placeholder="Input djot here" style="width:50%;height:100%;overflow:scroll;resize:none;box-sizing:border-box;margin:0">*Hello world!*</pre>
diff --git a/examples/jotdown_wasm/src/lib.rs b/examples/jotdown_wasm/src/lib.rs
index ba72c80..9aeb866 100644
--- a/examples/jotdown_wasm/src/lib.rs
+++ b/examples/jotdown_wasm/src/lib.rs
@@ -3,6 +3,12 @@ use wasm_bindgen::prelude::*;
 use jotdown::Render;
 use std::fmt::Write;
 
+#[must_use]
+#[wasm_bindgen]
+pub fn jotdown_version() -> String {
+    include_str!(concat!(env!("OUT_DIR"), "/version")).to_string()
+}
+
 #[must_use]
 #[wasm_bindgen]
 pub fn jotdown_render(djot: &str) -> String {