Tons of cleanup. More useless git notices.

src/io.rs

@@ -1,5 +1,7 @@
+use std::fs::{File, OpenOptions};
 use std::io::{self, Seek, SeekFrom};
-use std::path::{Path, PathBuf};
+
+use crate::cli::CONFIG;
 
 use anyhow::Context;
 
@@ -17,28 +19,49 @@ pub fn get_stream_length<S: Seek>(stream: &mut S) -> io::Result<u64> {
     len
 }
 
-/// Generates a file path if one not provided.
-/// source_name for fallback name.
-pub fn get_path<P>(
-    file_path: &Option<P>,
-    source_name: &P,
-    extension: &str,
-) -> anyhow::Result<PathBuf>
-where
-    P: AsRef<Path>,
-{
-    if let Some(f) = file_path {
-        return Ok(f.as_ref().to_path_buf());
-    }
-
-    Ok(PathBuf::from(format!(
-        "{}.{}",
-        source_name
-            .as_ref()
-            .to_str()
-            .context("source_name path was not UTF-8 valid.")?,
-        extension
-    ))
-    .as_path()
-    .to_owned())
+pub fn load_input() -> anyhow::Result<File> {
+    OpenOptions::new()
+        .read(true)
+        .open(&CONFIG.input)
+        .with_context(|| format!("Failed to open input file: {}", &CONFIG.input.display()))
+}
+
+pub fn load_output() -> anyhow::Result<File> {
+    OpenOptions::new()
+        .read(true)
+        .write(true)
+        .create(true)
+        .open(crate::path::OUTPUT_PATH.clone())
+        .with_context(|| {
+            format!(
+                "Failed to open/create output file at: {}",
+                crate::path::OUTPUT_PATH.display()
+            )
+        })
+}
+
+pub fn load_map_read() -> anyhow::Result<File> {
+    OpenOptions::new()
+        .read(true)
+        .open(crate::path::MAP_PATH.clone())
+        .with_context(|| {
+            format!(
+                "Failed to open/create mapping file at: {}",
+                crate::path::MAP_PATH.display()
+            )
+        })
+}
+
+pub fn load_map_write() -> anyhow::Result<File> {
+    OpenOptions::new()
+        .write(true)
+        .create(true)
+        .truncate(true) // Wipe old map. Should really make a backup first.
+        .open(crate::path::MAP_PATH.clone())
+        .with_context(|| {
+            format!(
+                "Failed to open map file at: {}",
+                crate::path::MAP_PATH.display()
+            )
+        })
 }