diff --git a/.gitignore b/.gitignore
index 5d2110f..b6f6506 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,5 +2,6 @@
 ci/Cargo.lock
 cli/Cargo.lock
 git/Cargo.lock
+logger/Cargo.lock
 utils/Cargo.lock
 target/
diff --git a/Cargo.lock b/Cargo.lock
index ec087ff..f162d1e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -38,6 +38,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "ci"
 version = "0.1.0"
+dependencies = [
+ "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "clap"
@@ -74,6 +77,7 @@ dependencies = [
 name = "git"
 version = "0.1.0"
 dependencies = [
+ "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "utils 0.1.0",
 ]
 
@@ -90,6 +94,22 @@ name = "libc"
 version = "0.2.65"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "log"
+version = "0.4.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "logger"
+version = "0.1.0"
+dependencies = [
+ "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "simple_logger 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.6"
@@ -158,6 +178,16 @@ dependencies = [
  "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "simple_logger"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "atty 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "ssc"
 version = "0.1.0"
@@ -165,6 +195,7 @@ dependencies = [
  "ci 0.1.0",
  "cli 0.1.0",
  "git 0.1.0",
+ "logger 0.1.0",
  "rand 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -270,6 +301,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum getrandom 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)" = "e7db7ca94ed4cd01190ceee0d8a8052f08a247aa1b469a7f68c6a3b71afcf407"
 "checksum heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "20564e78d53d2bb135c343b3f47714a56af2061f1c928fdb541dc7b9fdd94205"
 "checksum libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)" = "1a31a0627fdf1f6a39ec0dd577e101440b7db22672c0901fe00a9a6fbb5c24e8"
+"checksum log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)" = "14b6052be84e6b71ab17edffc2eeabf5c2c3ae1fdb464aae35ac50c67a44e1f7"
 "checksum ppv-lite86 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "74490b50b9fbe561ac330df47c08f3f33073d2d00c150f719147d7c54522fa1b"
 "checksum proc-macro-error 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "aeccfe4d5d8ea175d5f0e4a2ad0637e0f4121d63bd99d356fb1f39ab2e7c6097"
 "checksum proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "9c9e470a8dc4aeae2dee2f335e8f533e2d4b347e1434e5671afc49b054592f27"
@@ -278,6 +310,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum rand_chacha 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "03a2a90da8c7523f554344f921aa97283eadf6ac484a6d2a7d0212fa7f8d6853"
 "checksum rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
 "checksum rand_hc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ca3129af7b92a17112d59ad498c6f81eaf463253766b90396d39ea7a39d6613c"
+"checksum simple_logger 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fea0c4611f32f4c2bac73754f22dca1f57e6c1945e0590dae4e5f2a077b92367"
 "checksum strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
 "checksum structopt 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "c167b61c7d4c126927f5346a4327ce20abf8a186b8041bbeb1ce49e5db49587b"
 "checksum structopt-derive 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "519621841414165d2ad0d4c92be8f41844203f2b67e245f9345a5a12d40c69d7"
diff --git a/Cargo.toml b/Cargo.toml
index de365e8..1d67ad7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,6 +15,7 @@ edition = "2018"
 ci = { path = "ci" }
 cli = { path = "cli" }
 git = { path = "git" }
+logger = { path= "logger" }
 
 [dev-dependencies]
 rand = "0.7"
diff --git a/ci/Cargo.toml b/ci/Cargo.toml
index cc67104..2f9f2aa 100644
--- a/ci/Cargo.toml
+++ b/ci/Cargo.toml
@@ -3,3 +3,6 @@ name = "ci"
 version = "0.1.0"
 authors = ["KNP Labs"]
 edition = "2018"
+
+[dependencies]
+log = "0.4.8"
diff --git a/ci/src/lib.rs b/ci/src/lib.rs
index a26c422..43fbf63 100644
--- a/ci/src/lib.rs
+++ b/ci/src/lib.rs
@@ -1,16 +1,26 @@
+extern crate log;
+
 use std::process::Command;
+use log::debug;
 
 pub fn run_stop_cmd(cmd: &String) -> i32 {
     // As the cmd to run is a single string, we run it though a shell
     // otherwise rust will look for an executable which *is* the whole
     // `cmd` string.
-    let result = Command::new("/bin/sh")
+    let mut command = Command::new("/bin/sh");
+    command
         .arg("-c")
         .arg(cmd)
+    ;
+
+    debug!("Running `{:?}`", command);
+
+    let result = command
         .output()
         .expect("Unable to run the stop command.")
     ;
 
+
     return result.status.code().unwrap();
 }
 
diff --git a/cli/src/lib.rs b/cli/src/lib.rs
index db498fe..3311185 100644
--- a/cli/src/lib.rs
+++ b/cli/src/lib.rs
@@ -17,6 +17,11 @@ struct RawCli {
 
     #[structopt(long = "cmd", help = "The command to use to skip the build.")]
     cmd: String,
+
+    // The number of occurrences of the `v/verbose` flag
+    /// Verbose mode (-v, -vv, -vvv, etc.)
+    #[structopt(short, long, parse(from_occurrences), help = "Verbosity mode : -v, -vv")]
+    verbosity: u8,
 }
 
 // The Cli struct represents the resolved CLI args and options.
@@ -57,4 +62,8 @@ impl Cli {
     pub fn cmd(&self) -> &String {
         return &self.raw_cli.cmd;
     }
+
+    pub fn verbosity(&self) -> &u8 {
+        return &self.raw_cli.verbosity;
+    }
 }
diff --git a/git/Cargo.toml b/git/Cargo.toml
index 0dfcaa9..83ae158 100644
--- a/git/Cargo.toml
+++ b/git/Cargo.toml
@@ -6,3 +6,4 @@ edition = "2018"
 
 [dependencies]
 utils = { path = "../utils" }
+log = "0.4.8"
diff --git a/git/src/branch.rs b/git/src/branch.rs
index e0c2827..60b29d9 100644
--- a/git/src/branch.rs
+++ b/git/src/branch.rs
@@ -1,16 +1,25 @@
+extern crate log;
+
 use std::path::PathBuf;
 use std::process::Command;
+use log::debug;
 
 use utils::assert_or_panic;
 
 pub fn get_current_branch(
     working_directory: &PathBuf,
 ) -> String {
-    let result = Command::new("git")
+    let mut cmd = Command::new("git");
+    cmd
         .arg("rev-parse")
         .arg("--abbrev-ref")
         .arg("HEAD")
         .current_dir(&working_directory)
+    ;
+
+    debug!("Running `{:?}`", cmd);
+
+    let result = cmd
         .output()
         .expect("Failed to determine current branch.")
     ;
@@ -25,10 +34,16 @@ pub fn get_current_branch(
 pub fn get_current_remote(
     working_directory: &PathBuf,
 ) -> String {
-    let result = Command::new("git")
+    let mut cmd = Command::new("git");
+    cmd
         .arg("remote")
         .arg("show")
         .current_dir(&working_directory)
+    ;
+
+    debug!("Running `{:?}`", cmd);
+
+    let result = cmd
         .output()
         .expect("Failed to determine current remote.")
     ;
@@ -45,7 +60,8 @@ pub fn get_merge_base_commit(
     remote: &String,
     base_branch: &String,
 ) -> String {
-    let result = Command::new("git")
+    let mut cmd = Command::new("git");
+    cmd
         .arg("merge-base")
         .arg(format!(
             "{}/{}",
@@ -54,6 +70,11 @@ pub fn get_merge_base_commit(
         ))
         .arg("HEAD")
         .current_dir(&working_directory)
+    ;
+
+    debug!("Running `{:?}`", cmd);
+
+    let result = cmd
         .output()
         .expect("Failed to determine merge base.")
     ;
diff --git a/git/src/commits_range.rs b/git/src/commits_range.rs
index 09648ae..b7c8681 100644
--- a/git/src/commits_range.rs
+++ b/git/src/commits_range.rs
@@ -9,12 +9,12 @@ pub struct CommitsRange {
 }
 
 impl CommitsRange {
-    pub fn to_str(&self) -> String {
-        return format!(
-            "{}..{}",
-            &self.from,
-            &self.to,
-        );
+    pub fn from(&self) -> &String {
+        return &self.from;
+    }
+
+    pub fn to(&self) -> &String {
+        return &self.to;
     }
 }
 
diff --git a/git/src/path_inspector.rs b/git/src/path_inspector.rs
index b4d005a..ea7c053 100644
--- a/git/src/path_inspector.rs
+++ b/git/src/path_inspector.rs
@@ -1,5 +1,8 @@
+extern crate log;
+
 use std::path::PathBuf;
 use std::process::Command;
+use log::{debug, info};
 
 use utils::assert_or_panic;
 use crate::commits_range::CommitsRange;
@@ -9,16 +12,31 @@ pub fn has_changes_in_paths(
     commits_range: &CommitsRange,
     paths: &Vec<PathBuf>
 ) -> bool {
-    let result = Command::new("git")
-        .arg("log")
-        .arg(commits_range.to_str())
+    let mut cmd = Command::new("git");
+    cmd
+        .arg("diff")
+        .arg("--stat")
+        .arg(commits_range.from())
+        .arg(commits_range.to())
         .args(paths)
         .current_dir(&working_directory)
+    ;
+
+    debug!("Running `{:?}`", cmd);
+
+    let result = cmd
         .output()
         .expect("Failed to run git log command.")
     ;
 
-    assert_or_panic(&result, &String::from("git log"));
+    assert_or_panic(&result, &String::from("git diff"));
+
+    info!(
+        "Detected diff from {} to {} :\n{}",
+        commits_range.from(),
+        commits_range.to(),
+        String::from_utf8(result.stdout.to_vec()).unwrap()
+    );
 
     return !result.stdout.is_empty();
 }
diff --git a/logger/Cargo.toml b/logger/Cargo.toml
new file mode 100644
index 0000000..3dec548
--- /dev/null
+++ b/logger/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "logger"
+version = "0.1.0"
+authors = ["KNP Labs"]
+edition = "2018"
+
+[dependencies]
+log = "0.4.8"
+simple_logger = { version = "1.6.0", default-features = false }
diff --git a/logger/src/lib.rs b/logger/src/lib.rs
new file mode 100644
index 0000000..20337ee
--- /dev/null
+++ b/logger/src/lib.rs
@@ -0,0 +1,16 @@
+extern crate log;
+extern crate simple_logger;
+
+use log::Level;
+
+pub fn configure_logger(verbosity: &u8) {
+    let level: Level;
+
+    match *verbosity {
+        1 => level = Level::Info,
+        2 => level = Level::Debug,
+        _ => level = Level::Warn,
+    }
+
+    simple_logger::init_with_level(level).unwrap();
+}
diff --git a/src/main.rs b/src/main.rs
index 30c0d16..26f9525 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -5,10 +5,13 @@ use std::process::exit;
 
 use cli::Cli;
 use lib::should_skip_ci;
+use logger::configure_logger;
 
 fn main() {
     let cli: Cli = Cli::new();
 
+    configure_logger(cli.verbosity());
+
     let status_code: i32 = should_skip_ci(
         &current_dir().unwrap(),
         cli.paths(),