feat: new custom module

Allows basic modules to be created from a config object, including popup content.

src/script.rs

@@ -0,0 +1,35 @@
+use color_eyre::eyre::WrapErr;
+use color_eyre::{Help, Report, Result};
+use std::process::Command;
+use tracing::instrument;
+
+/// Attempts to execute a given command.
+/// If the command returns status 0,
+/// the `stdout` is returned.
+/// Otherwise, an `Err` variant
+/// containing the `stderr` is returned.
+#[instrument]
+pub fn exec_command(command: &str) -> Result<String> {
+    let output = Command::new("sh")
+        .arg("-c")
+        .arg(command)
+        .output()
+        .wrap_err("Failed to get script output")?;
+
+    if output.status.success() {
+        let stdout = String::from_utf8(output.stdout)
+            .map(|output| output.trim().to_string())
+            .wrap_err("Script stdout not valid UTF-8")?;
+
+        Ok(stdout)
+    } else {
+        let stderr = String::from_utf8(output.stderr)
+            .map(|output| output.trim().to_string())
+            .wrap_err("Script stderr not valid UTF-8")?;
+
+        Err(Report::msg(stderr)
+            .wrap_err("Script returned non-zero error code")
+            .suggestion("Check the path to your script")
+            .suggestion("Check the script for errors"))
+    }
+}