Remove hard-coded PATH

Use $PATH, instead of a hard-coded PATH from main(). This means that
there is no longer a need to pass around PATH to
repl()/recite()/path::refresh(), since path::refresh() can call env::var
directly.

Since the hard-coded paths were removed, there needs to be some way to
define $PATH. When running the debug build, dwvsh will look in
'dist/etc/dwvshrc' for the initial environment setup. For the release
target, dwvsh will look in '/etc/dwvshrc'. After the global rc file is
sourced, dwvsh will try to source ~/.dwvshrc if it exists, so users can
extend their environment without root access (assuming a release install).

1 files changed, 58 insertions, 0 deletions

diff --git a/src/compose.rs b/src/compose.rs
new file mode 100644
index 0000000..8c4b3ea
--- /dev/null
+++ b/src/compose.rs
@@ -0,0 +1,58 @@
+use crate::poem::{read::Readable, recite::Reciteable, Poem};
+use std::fs;
+use std::path::PathBuf;
+
+pub fn env() {
+    // Use local repo path if running the debug target
+    let global_rc = if cfg!(debug_assertions) {
+        let mut base = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+        base.push("dist/etc/dwvshrc");
+        base
+    } else {
+        PathBuf::from("/etc/dwvshrc")
+    };
+
+    // User defined rc file in ~
+    let mut local_rc = PathBuf::from(env!("HOME"));
+    local_rc.push(".dwvshrc");
+
+    // Read, read, and recite
+    rrr(global_rc);
+    rrr(local_rc);
+}
+
+fn rrr(path: PathBuf) {
+    let poetry = match fs::read_to_string(&path) {
+        Ok(poetry) => poetry,
+        Err(e) => {
+            if path.to_string_lossy().contains("etc/dwvshrc") {
+                eprintln!(
+                    "dwvsh: unable to read global dwvshrc file: {}",
+                    e.to_string().to_lowercase()
+                );
+            }
+            return;
+        }
+    };
+
+    let poem = match Poem::read(poetry) {
+        Ok(poem) => poem,
+        Err(e) => {
+            eprintln!(
+                "dwvsh: error in {}: {}",
+                path.display(),
+                e.to_string().to_lowercase()
+            );
+            return;
+        }
+    };
+
+    let mut bins = vec![];
+    match poem.recite(&mut bins, None) {
+        Ok(_) => {}
+        Err(e) => {
+            eprintln!("dwvsh: {}", e.to_string().to_lowercase());
+            return;
+        }
+    }
+}