Highlight uncommitted changes in version

If there are uncommitted changes in the app repository when building,
then append `_uncommitted_<random>` to it to distinguish the image
from one built from a clean checkout.

Also change the version used when renaming a container on redeploy to
distinguish and explain the version suffixes.

test/cli/app_test.rb

@@ -32,7 +32,7 @@ class CliAppTest < CliTestCase
 
     run_command("boot").tap do |output|
       assert_match /Renaming container .* to .* as already deployed on 1.1.1.1/, output # Rename
-      assert_match /docker rename .* .*/, output
+      assert_match /docker rename app-web-latest app-web-latest_replaced_[0-9a-f]{16}/, output
       assert_match "docker run --detach --restart unless-stopped", output
       assert_match "docker container ls --all --filter name=^app-web-123$ --quiet | xargs docker stop", output
     end

test/configuration_test.rb

@@ -72,19 +72,36 @@ class ConfigurationTest < ActiveSupport::TestCase
     assert_equal [ "1.1.1.1", "1.1.1.2", "1.1.1.3" ], config.traefik_hosts
   end
 
-  test "version" do
+  test "version no git repo" do
     ENV.delete("VERSION")
 
     @config.expects(:system).with("git rev-parse").returns(nil)
     error = assert_raises(RuntimeError) { @config.version}
     assert_match /no git repository found/, error.message
+  end
 
-    @config.expects(:current_commit_hash).returns("git-version")
+  test "version from git committed" do
+    ENV.delete("VERSION")
+
+    @config.expects(:`).with("git rev-parse HEAD").returns("git-version")
+    @config.expects(:`).with("git status --porcelain").returns("")
     assert_equal "git-version", @config.version
+  end
 
+  test "version from git uncommitted" do
+    ENV.delete("VERSION")
+
+    @config.expects(:`).with("git rev-parse HEAD").returns("git-version")
+    @config.expects(:`).with("git status --porcelain").returns("M   file\n")
+    assert_match /^git-version_uncommitted_[0-9a-f]{16}$/, @config.version
+  end
+
+  test "version from env" do
     ENV["VERSION"] = "env-version"
     assert_equal "env-version", @config.version
+  end
 
+  test "version from arg" do
     @config.version = "arg-version"
     assert_equal "arg-version", @config.version
   end

test/integration/deploy_test.rb

@@ -110,7 +110,7 @@ class DeployTest < ActiveSupport::TestCase
     end
 
     def latest_app_version
-      deployer_exec("cat version", capture: true)
+      deployer_exec("git rev-parse HEAD", capture: true)
     end
 
     def assert_app_version(version)

test/integration/docker/deployer/Dockerfile

@@ -23,7 +23,6 @@ RUN mkdir -p /etc/docker/certs.d/registry:4443 && ln -s /shared/certs/domain.crt
 RUN git config --global user.email "deployer@example.com"
 RUN git config --global user.name "Deployer"
 RUN git init && git add . && git commit -am "Initial version"
-RUN git rev-parse HEAD > version
 
 HEALTHCHECK --interval=1s CMD pgrep sleep
 

test/integration/docker/deployer/app/Dockerfile

@@ -1,4 +1,7 @@
 FROM nginx:1-alpine-slim
 
 COPY default.conf /etc/nginx/conf.d/default.conf
-COPY version /usr/share/nginx/html/version
+
+ARG COMMIT_SHA
+RUN echo $COMMIT_SHA > /usr/share/nginx/html/version
+

test/integration/docker/deployer/app/config/deploy.yml

@@ -9,6 +9,8 @@ registry:
   password: root
 builder:
   multiarch: false
+  args:
+    COMMIT_SHA: <%= `git rev-parse HEAD` %>
 healthcheck:
   cmd: wget -qO- http://localhost > /dev/null
 traefik:

test/integration/docker/deployer/update_app_rev.sh

@@ -1,4 +1,3 @@
 #!/bin/bash
 
 git commit -am 'Update rev' --amend
-git rev-parse HEAD > version