Add logger and verbose flag

Cargo.lock

@@ -1,5 +1,14 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "aho-corasick"
+version = "0.7.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "043164d8ba5c4c3035fec9bbee8647c0261d788f3474306f93bb65901cae0e86"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "ansi_term"
 version = "0.11.0"
@@ -26,6 +35,12 @@ version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 
+[[package]]
+name = "cfg-if"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
+
 [[package]]
 name = "clap"
 version = "2.33.3"
@@ -45,10 +60,25 @@ dependencies = [
 name = "compose-updater"
 version = "0.1.0"
 dependencies = [
+ "env_logger",
  "glob",
+ "log",
  "structopt",
 ]
 
+[[package]]
+name = "env_logger"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "44533bbbb3bb3c1fa17d9f2e4e38bbbaf8396ba82193c4cb1b6445d711445d36"
+dependencies = [
+ "atty",
+ "humantime",
+ "log",
+ "regex",
+ "termcolor",
+]
+
 [[package]]
 name = "glob"
 version = "0.3.0"
@@ -73,6 +103,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "humantime"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df004cfca50ef23c36850aaaa59ad52cc70d0e90243c3c7737a4dd32dc7a3c4f"
+dependencies = [
+ "quick-error",
+]
+
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -85,6 +124,21 @@ version = "0.2.79"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2448f6066e80e3bfc792e9c98bf705b4b0fc6e8ef5b43e5889aff0eaa9c58743"
 
+[[package]]
+name = "log"
+version = "0.4.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fabed175da42fed1fa0746b0ea71f412aa9d35e76e95e59b192c64b9dc2bf8b"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "memchr"
+version = "2.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3728d817d99e5ac407411fa471ff9800a778d88a24685968b36824eaf4bee400"
+
 [[package]]
 name = "proc-macro-error"
 version = "1.0.4"
@@ -118,6 +172,12 @@ dependencies = [
  "unicode-xid",
 ]
 
+[[package]]
+name = "quick-error"
+version = "1.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1d01941d82fa2ab50be1e79e6714289dd7cde78eba4c074bc5a4374f650dfe0"
+
 [[package]]
 name = "quote"
 version = "1.0.7"
@@ -127,6 +187,24 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "regex"
+version = "1.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c3780fcf44b193bc4d09f36d2a3c87b251da4a046c87795a0d35f4f927ad8e6"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+ "thread_local",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.6.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26412eb97c6b088a6997e05f69403a802a92d520de2f8e63c2b65f9e0f47c4e8"
+
 [[package]]
 name = "strsim"
 version = "0.8.0"
@@ -168,6 +246,15 @@ dependencies = [
  "unicode-xid",
 ]
 
+[[package]]
+name = "termcolor"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb6bfa289a4d7c5766392812c0a1f4c1ba45afa1ad47803c11e1f407d846d75f"
+dependencies = [
+ "winapi-util",
+]
+
 [[package]]
 name = "textwrap"
 version = "0.11.0"
@@ -177,6 +264,15 @@ dependencies = [
  "unicode-width",
 ]
 
+[[package]]
+name = "thread_local"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d40c6d1b69745a6ec6fb1ca717914848da4b44ae29d9b3080cbee91d72a69b14"
+dependencies = [
+ "lazy_static",
+]
+
 [[package]]
 name = "unicode-segmentation"
 version = "1.6.0"
@@ -223,6 +319,15 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
+[[package]]
+name = "winapi-util"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"

Cargo.toml

@@ -9,3 +9,5 @@ edition = "2018"
 [dependencies]
 structopt = "0.3.15"
 glob = "0.3.0"
+log = "0.4.11"
+env_logger = "0.7.1"

src/main.rs

@@ -1,3 +1,5 @@
+#[macro_use]
+extern crate log;
 use glob::glob;
 use std::path::PathBuf;
 use std::process::exit;
@@ -10,6 +12,9 @@ mod compose;
 struct Opt {
     #[structopt(name = "files")]
     files: Vec<String>,
+
+    #[structopt(short, long)]
+    verbose: bool,
 }
 
 fn get_files(files: &[String]) -> Option<Vec<PathBuf>> {
@@ -27,10 +32,22 @@ fn get_files(files: &[String]) -> Option<Vec<PathBuf>> {
 
 fn main() {
     let opts = Opt::from_args();
+    env_logger::builder()
+        .format_timestamp(None)
+        .filter_level(if opts.verbose {
+            log::LevelFilter::Debug
+        } else {
+            log::LevelFilter::Info
+        })
+        .format_module_path(false)
+        .init();
+
     if opts.files.is_empty() {
-        println!("Must specify some files");
+        error!("Must specify some files");
         exit(1);
     }
+
+    debug!("Searching for files...");
     let compose_files = match get_files(&opts.files) {
         Some(f) => f,
         None => exit(1),
@@ -40,5 +57,6 @@ fn main() {
         .iter()
         .map(compose::ComposeProject::new)
         .collect();
-    println!("Found {} projects", compose_projects.len());
+
+    info!("Found {} projects", compose_projects.len());
 }