diff --git a/Makefile b/Makefile
index 4984ea6..3ba81e5 100644
--- a/Makefile
+++ b/Makefile
@@ -43,3 +43,16 @@ install:
 	install -D --target-directory="$(DESTDIR)$(BINDIR)" bin/$(NAME)-*
 	install --directory "$(DESTDIR)$(TMPDIR)/$(NAME)/deployer/request"
 	install --directory "$(DESTDIR)$(TMPDIR)/$(NAME)/deployer/response"
+
+.PHONY: check_format
+check_format:
+	shfmt --diff .
+
+.PHONY: check_linting
+check_linting:
+	shfmt --find . | xargs bash -o noexec
+	shfmt --find . | xargs shellcheck
+
+.PHONY: unit_test
+unit_test:
+	@echo "not implemented yet"
diff --git a/netoik-cicd.spec b/netoik-cicd.spec
index c8c60a2..94ac914 100644
--- a/netoik-cicd.spec
+++ b/netoik-cicd.spec
@@ -10,7 +10,7 @@ Source0:        %{name}-%{version}.tar.gz
 
 BuildArch:	x86_64
 BuildRequires:	make
-Requires:       bash,rpm-build,rpmdevtools,inotify-tools
+Requires:       bash,rpm-build,rpmdevtools,inotify-tools,shfmt,shellcheck
 
 %description
 Netoik Continuous Deployment tool
diff --git a/src/newcommit.sh b/src/newcommit.sh
new file mode 100644
index 0000000..0bd5acc
--- /dev/null
+++ b/src/newcommit.sh
@@ -0,0 +1,35 @@
+#!/usr/bin/bash
+#
+# This binary is made to be run by git server, it checks code validity.
+
+# Exit immediately if any command fails.
+set -e
+
+# Exit with the last non-zero exit code.
+set -o pipefail
+
+# Name of current gitops pipeline.
+pipeline="NEWTAG"
+
+log () {
+        echo -e "[$pipeline] $(date --rfc-3339=s) - $1"
+}
+
+fail () {
+        if [ $# -eq 1 ]; then
+                echo "$1" 1>&2
+        fi
+        exit 1
+}
+
+# Check format.
+log "Check format."
+make check_format
+
+# Check linting.
+log "Check linting."
+make check_linting
+
+# Run unit tests.
+log "Run unit tests."
+make unit_test
diff --git a/src/newtag.sh b/src/newtag.sh
index 5477109..c207501 100755
--- a/src/newtag.sh
+++ b/src/newtag.sh
@@ -29,6 +29,12 @@ pkg_name=$(make name)
 pkg_version=$(make version)
 [ -z $pkg_version ] && fail "Empty result for target 'make version'."
 
+# Check code validity.
+log "Check code validity for $pkg_name v$pkg_version."
+make check_format
+make check_linting
+make unit_test
+
 # Make tarball with source code.
 log "Make source tarball for $pkg_name v$pkg_version."
 make tarball