Add independent Rust Hasher rootfs builder

1 files changed, 61 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..b7bf8c2
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,61 @@
+use std::fs;
+use std::path::{Path, PathBuf};
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct Profile {
+    pub packages: Vec<String>,
+    pub regex_packages: Vec<String>,
+}
+
+impl Profile {
+    pub fn load(path: &Path) -> Result<Self, String> {
+        let profile = fs::read_to_string(path).map_err(|error| error.to_string())?;
+        let parent = path.parent().ok_or("profile path has no parent")?;
+        let mut packages = Vec::new();
+        let mut regex_packages = Vec::new();
+
+        for line in profile.lines() {
+            let line = line.trim();
+            if line.is_empty() || line.starts_with('#') {
+                continue;
+            }
+            if let Some(values) = line.strip_prefix("base:") {
+                extend_words(&mut packages, values);
+            } else if let Some(relative) = line.strip_prefix("include:") {
+                let list = parent.join(relative.trim());
+                let contents = fs::read_to_string(&list)
+                    .map_err(|error| format!("{}: {error}", list.display()))?;
+                for entry in contents.lines().map(str::trim) {
+                    if entry.is_empty() || entry.starts_with('#') {
+                        continue;
+                    }
+                    let package = entry.split('@').next().unwrap_or(entry).trim();
+                    if !package.is_empty() {
+                        packages.push(package.to_owned());
+                    }
+                }
+            } else if let Some(value) = line.strip_prefix("regex:") {
+                regex_packages.push(value.trim().to_owned());
+            } else {
+                return Err(format!("unsupported profile statement: {line}"));
+            }
+        }
+        packages.sort();
+        packages.dedup();
+        regex_packages.sort();
+        regex_packages.dedup();
+        Ok(Self { packages, regex_packages })
+    }
+
+    pub fn install_arguments(&self) -> Vec<String> {
+        self.regex_packages.iter().chain(self.packages.iter()).cloned().collect()
+    }
+}
+
+fn extend_words(target: &mut Vec<String>, values: &str) {
+    target.extend(values.split_whitespace().map(str::to_owned));
+}
+
+pub fn artifact_path(project: &Path) -> PathBuf {
+    project.join("out/alt-controller-rootfs.tar")
+}