Add log/env_logger, empty store module

Cargo.lock

@@ -2,6 +2,15 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "aho-corasick"
+version = "0.7.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b4f55bd91a0978cbfd91c457a164bab8b4001c833b7f323132c0a4e1922dd44e"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "atty"
 version = "0.2.14"
@@ -19,6 +28,12 @@ version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
 [[package]]
 name = "clap"
 version = "4.0.14"
@@ -56,6 +71,19 @@ dependencies = [
  "os_str_bytes",
 ]
 
+[[package]]
+name = "env_logger"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c90bf5f19754d10198ccb95b70664fc925bd1fc090a0fd9a6ebc54acc8cd6272"
+dependencies = [
+ "atty",
+ "humantime",
+ "log",
+ "regex",
+ "termcolor",
+]
+
 [[package]]
 name = "heck"
 version = "0.4.0"
@@ -71,17 +99,40 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "humantime"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a3a5bfb195931eeb336b2a7b4d761daec841b97f947d34394601737a7bba5e4"
+
 [[package]]
 name = "libc"
 version = "0.2.135"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "68783febc7782c6c5cb401fbda4de5a9898be1762314da0bb2c10ced61f18b0c"
 
+[[package]]
+name = "log"
+version = "0.4.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "memchr"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
+
 [[package]]
 name = "nancy"
 version = "0.1.0"
 dependencies = [
  "clap",
+ "env_logger",
+ "log",
 ]
 
 [[package]]
@@ -138,6 +189,23 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "regex"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4c4eb3267174b8c6c2f654116623910a0fef09c4753f8dd83db29c48a0df988b"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.6.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a3f87b73ce11b1619a3c6332f45341e0047173771e8b8b73f87bfeefb7b56244"
+
 [[package]]
 name = "strsim"
 version = "0.10.0"

Cargo.toml

@@ -19,3 +19,5 @@ path = "src/cli/main.rs"
 
 [dependencies]
 clap = { version = "4.0.14", features = ["derive"] }
+env_logger = "0.9.1"
+log = "0.4.17"

src/cli/main.rs

@@ -1,4 +1,5 @@
 use clap::{Parser, Subcommand};
+use env_logger;
 use nancy;
 
 // Composable provenance tracking for scientific data analysis
@@ -11,23 +12,35 @@ struct Cli {
 
 #[derive(Subcommand)]
 enum Commands {
-    /// just says hello
+    /// Record changes to a store directory (or a new store)
+    Record {
+    },
+    /// Check for changes in store and print basic statistics
+    Status {
+    },
+    /// Just say hello
     Hello {
-        /// say hello from lib too?
         #[arg(short, long)]
         fromlib: bool,
     },
 }
 
 fn main() {
+    env_logger::init();
     let cli = Cli::parse();
 
     match &cli.command {
         Some(Commands::Hello { fromlib }) => {
+            println!("Hello from nancy (binary)!");
             if *fromlib {
                 nancy::say_hello();
             }
-            println!("Hello from nancy (binary)!")
+        }
+        Some(Commands::Record { }) => {
+            println!("Record not yet implemented");
+        }
+        Some(Commands::Status { }) => {
+            println!("Status not yet implemented");
         }
         None => {}
     }

src/lib/main.rs

@@ -1,3 +1,9 @@
+use log;
+
+mod store;
+
 pub fn say_hello() {
-    println!("Hello from libnancy.rlib!");
+    log::trace!("enter say_hello()");
+    println!("If you see nothing in the next line, set RUST_LOG to info or lower");
+    log::info!("Hello from libnancy.rlib!!!");
 }

src/lib/store.rs

@@ -0,0 +1,3 @@
+struct Store{
+};
+