Setup codecov (#37)

* Report coverage to the Codecov service even if the build failed.

* Setup Codecov README and documentation badges.

* Setup target coverage.

README.md

@@ -1,6 +1,7 @@
 [![Mappers](https://raw.githubusercontent.com/dry-python/brand/master/logo/mappers.png)](https://github.com/dry-python/mappers)
 
-[![Build Status](https://dev.azure.com/dry-python/mappers/_apis/build/status/dry-python.mappers?branchName=master)](https://dev.azure.com/dry-python/mappers/_build/latest?definitionId=1&branchName=master)
+[![azure-pipeline](https://dev.azure.com/dry-python/mappers/_apis/build/status/dry-python.mappers?branchName=master)](https://dev.azure.com/dry-python/mappers/_build/latest?definitionId=1&branchName=master)
+[![codecov](https://codecov.io/gh/dry-python/mappers/branch/master/graph/badge.svg)](https://codecov.io/gh/dry-python/mappers)
 
 -----
 

azure-pipelines.yml

@@ -81,7 +81,7 @@ jobs:
         inputs:
           versionSpec: $(python.version)
         displayName: Install Python.
-      - script: pip install --upgrade tox
+      - script: pip install --upgrade tox codecov
         displayName: Install Tox.
       - task: NodeTool@0
         inputs:
@@ -91,14 +91,10 @@ jobs:
       - script: tox -e $(tox.env)
         displayName: Run Tox.
       - script: |
-          if [ ! -f .coverage ]; then
-            echo No coverage data found.
-            exit 0
+          if [ -f .coverage ]
+          then
+            codecov
           fi
-          PATH=$HOME/.local/bin:$PATH
-          python$(python.version) -m pip install --user codecov
-          codecov
         env:
           CODECOV_TOKEN: $(codecov.token)
-        condition: succeeded()
         displayName: Report Coverage.

codecov.yml

@@ -0,0 +1,10 @@
+---
+comment: false
+coverage:
+  status:
+    project:
+      default:
+        target: 95%
+    patch:
+      default:
+        target: 100%

docs/index.md

@@ -1,6 +1,7 @@
 [![Mappers](https://raw.githubusercontent.com/dry-python/brand/master/logo/mappers.png)](https://github.com/dry-python/mappers)
 
-[![Build Status](https://dev.azure.com/dry-python/mappers/_apis/build/status/dry-python.mappers?branchName=master)](https://dev.azure.com/dry-python/mappers/_build/latest?definitionId=1&branchName=master)
+[![azure-pipeline](https://dev.azure.com/dry-python/mappers/_apis/build/status/dry-python.mappers?branchName=master)](https://dev.azure.com/dry-python/mappers/_build/latest?definitionId=1&branchName=master)
+[![codecov](https://codecov.io/gh/dry-python/mappers/branch/master/graph/badge.svg)](https://codecov.io/gh/dry-python/mappers)
 
 -----