Unbundle bash_env.sh as bash-env-json (#33)

The backend Bash script is now shared by nu_plugin_bash_env and
bash-env-elvish.

It is fetched from the source repo by the Rust build script, so
migration should be seamless.

.github/workflows/test-suite.yml

@@ -1,5 +1,11 @@
 name: test suite
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
 env:
   NU_VERSION: 0.98.0
 

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "nu_plugin_bash_env"
-version = "0.14.2"
+version = "0.15.0"
 edition = "2021"
 license = "MIT"
 description = "Nu plugin bash-env"
@@ -14,7 +14,6 @@ itertools = "0.13.0"
 nu-plugin = "0.98.0"
 nu-protocol = "0.98.0"
 once_cell = "1.19.0"
-rust-embed = "8.5.0"
 serde = "1.0.208"
 serde_json = "1.0.125"
 shellexpand = "3.1.0"

README.md

@@ -29,6 +29,7 @@ The following versions are compatible.
 |    0.96 |          0.12.1 |
 |    0.97 |          0.13.0 |
 |    0.98 |          0.14.2 |
+|    0.98 |          0.15.0 |
 
 If you find a new version of Nushell rejects this plugin as incompatible, please report an [issue](https://github.com/tesujimath/nu_plugin_bash_env/issues).
 
@@ -38,6 +39,8 @@ The script uses `jq` for output formatting. Previous versions required at least
 
 Also I suspect at least Bash version `5.1`.
 
+Since version `0.15.0`, this plugin uses [`bash-env-json`](https://github.com/tesujimath/bash-env-json) instead of the previously bundled `bash_env.sh` script.  However, this is fetched and embedded at build time, so there is no difference at runtime.
+
 ## Examples
 
 ### Simple Usage
@@ -132,7 +135,7 @@ Prior to 0.13.0 this plugin was written in Bash, with the Nu plugin protocol don
 
 Since 0.13.0, the plugin is written in Rust, with the much simplified Bash script embedded.
 
-By default the embedded Bash script is extracted at runtime into a temporary directory.  This behaviour may be overridden by setting the ``NU_PLUGIN_BASH_ENV_SCRIPT` environment variable, which is then expected to resolve to the path of the pre-installed script.
+By default the embedded Bash script is extracted at runtime into a temporary directory.  This behaviour may be overridden by setting the ``NU_PLUGIN_BASH_ENV_JSON` environment variable, which is then expected to resolve to the path of the pre-installed script.
 
 ## Logging
 

build.rs

@@ -0,0 +1,54 @@
+use std::{
+    env,
+    path::{Path, PathBuf},
+};
+
+const BASH_ENV_JSON_VERSION: &str = "0.6.1";
+
+fn fetch_bash_env_json() -> Option<PathBuf> {
+    let out_dir: PathBuf = env::var("OUT_DIR").unwrap().into();
+    let bash_env_json_repo_dir = PathBuf::from("bash-env-json");
+    let bash_env_json_repo_path = out_dir.join(bash_env_json_repo_dir.as_path());
+
+    if Path::exists(&bash_env_json_repo_path) {
+        Some(bash_env_json_repo_path)
+    } else {
+        let bash_env_json_repo_path_str = bash_env_json_repo_path.to_string_lossy();
+        let git_args = [
+            "clone",
+            "--filter=blob:none",
+            "--branch",
+            BASH_ENV_JSON_VERSION,
+            "https://github.com/tesujimath/bash-env-json.git",
+            bash_env_json_repo_path_str.as_ref(),
+        ];
+        println!("cargo:warning=git {}", &git_args.join(" "));
+        match std::process::Command::new("git").args(git_args).output() {
+            Ok(output) => {
+                if output.status.success() {
+                    Some(bash_env_json_repo_path)
+                } else {
+                    println!(
+                        "cargo:warning=git {:?} failed: {}",
+                        &git_args, output.status
+                    );
+
+                    None
+                }
+            }
+            Err(e) => {
+                println!("cargo:warning=git clone failed: {}", e);
+
+                None
+            }
+        }
+    }
+}
+
+fn main() -> std::io::Result<()> {
+    if let Some(_bash_env_json_repo_path) = fetch_bash_env_json() {
+        // TODO what now?
+    }
+
+    Ok(())
+}