refactor makefile elements into submodules

1 files changed, 22 insertions, 0 deletions

diff --git a/src/makefile/inference_rules.rs b/src/makefile/inference_rules.rs
new file mode 100644
index 0000000..3d18730
--- /dev/null
+++ b/src/makefile/inference_rules.rs
@@ -0,0 +1,22 @@
+use std::fmt;
+
+use crate::makefile::command_line::CommandLine;
+
+#[derive(PartialEq, Eq, Clone, Debug)]
+pub struct InferenceRule {
+    /// POSIX calls this ".s1" but that's not useful.
+    pub product: String,
+    /// POSIX calls this ".s2" but that's not useful.
+    pub prereq: String,
+    pub commands: Vec<CommandLine>,
+}
+
+impl fmt::Display for InferenceRule {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        writeln!(f, "{}{}:", &self.prereq, &self.product)?;
+        for command in &self.commands {
+            writeln!(f, "\t{}", command)?;
+        }
+        Ok(())
+    }
+}