build: fixes version for published packages

Cargo.toml

@@ -11,6 +11,7 @@ build = "build.rs"
 include = [
     "**/*.rs",
     "Cargo.toml",
+    "sitters/tree-sitter-*/pepegsitter-version",
     "sitters/tree-sitter-*/*.js",
     "sitters/tree-sitter-*/queries/*.scm",
     "sitters/tree-sitter-*/**/*.c",

build.rs

@@ -55,6 +55,11 @@ impl Sitter {
 
     fn version(&self) -> &str {
         self.version.get_or_init(|| {
+            let version_file = self.path.join("pepegsitter-version");
+            if let Ok(version) = std::fs::read_to_string(version_file) {
+                return version.trim().to_owned();
+            }
+
             let output = Command::new("git")
                 .arg("rev-parse")
                 .arg(format!("HEAD:{}", self.path.display()))
@@ -177,6 +182,8 @@ fn write_pepegsit(sitter @ Sitter { lang, .. }: &Sitter) -> std::io::Result<()>
         }}
 
         /// Get the commit hash or version of this grammar.
+        ///
+        /// Current version: `{version}`.
         pub const fn version() -> &'static str {{
             "{version}"
         }}

publish.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+# `cargo publish` ignores directories containing a Cargo.toml
+git submodule foreach "rm -f Cargo.toml"
+
+# Record the version, so the build script has access to it
+git submodule foreach "git rev-parse HEAD > pepegsitter-version"
+
+# Run the publish, user needs to pass --allow-dirty, just to make sure ...
+cargo publish $@
+
+# Reset the changes just made.
+git submodule foreach "git reset --hard HEAD && git clean -f"