Add kubeval and yaml-lint hooks

githooks/pre-push/kubeval

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+currentBranch="$(git rev-parse --abbrev-ref HEAD)"
+originCommit="$(git rev-parse --short "$(git merge-base master "$currentBranch")")"
+filesToBePushed="$(git diff --name-only "$originCommit")"
+failed=0
+
+check-kubeval() {
+    if ! command -v kubeval > /dev/null 2>&1; then
+        printf '\033[0;31m\U1F6ABkubeval is not installed\033[0m'
+        printf '  Install it from https://github.com/instrumenta/kubeval/releases'
+        exit 1
+    fi
+}
+
+for chartName in $( cut -d'/' -f1,2 <<< "$filesToBePushed" | uniq ); do
+    check-kubeval
+    # Avoid running 'kubeval' when modified dirs are not charts
+    if [[ $chartName = bitnami/* ]]; then
+        printf '\033[01;33mValidating %s:\n\033[0m' "$chartName"
+        chartPath="$(git rev-parse --show-toplevel)"/"$chartName"
+
+        printf '\033[0;34m- Running helm template %s | kubeval\n\033[0m' "$chartPath"
+        if helm template "$chartPath" | kubeval; then
+            printf '\033[0;32m\U2705 helm template %s | kubeval\n\n\033[0m' "$chartPath"
+        else
+            printf '\033[0;31m\U1F6AB helm template %s | kubeval failed. Push cancelled.\n\n\033[0m' "$chartPath"
+            failed=1
+        fi
+    fi
+done
+
+exit $failed

githooks/pre-push/yaml-lint

@@ -0,0 +1,79 @@
+#!/bin/bash
+
+currentBranch="$(git rev-parse --abbrev-ref HEAD)"
+originCommit="$(git rev-parse --short "$(git merge-base master "$currentBranch")")"
+filesToBePushed="$(git diff --name-only "$originCommit")"
+repoPath="$(git rev-parse --show-toplevel)"
+
+failed=0
+
+yaml-lint-file-render() {
+    local -r chart_path="${1:?missing_chart}"
+    local -r path="${2:?missing_file}"
+    local -r display_path=${1#"$repoPath/"}
+    local -r lint_rules="{extends: default, rules: {line-length: disable, trailing-spaces: disable, truthy: enable, document-start: disable, empty-lines: {max-end: 2} }}"
+    printf '\033[0;34m- Running yamllint on %s/%s\n\033[0m' "$display_path" "$path"
+
+    if ! helm template "$chart_path" -x "$path" | yamllint -d "$lint_rules" -; then
+        printf '\033[0;31m\U1F6AB (helm template %s -x %s | yamllint -d "%s" -) failed\n\n\033[0m' "$chart_path" "$path" "$lint_rules"
+        false
+    else
+        printf '\033[0;32m\U2705 %s/%s\n\n\033[0m' "$display_path" "$path"
+        true
+    fi
+}
+
+yaml-lint-file() {
+    local -r path="${1:?missing_file}"
+    local -r lint_rules="{extends: default, rules: {line-length: disable, trailing-spaces: disable, truthy: enable, document-start: disable, empty-lines: {max-end: 2}}}"
+    local -r display_path=${1#"$repoPath/"}
+    printf '\033[0;34m- Running yamllint on %s\n' "$display_path"
+    if ! yamllint -d "$lint_rules" "$path"; then
+        printf '\033[0;31m\U1F6AB yamllint -d "%s" %s failed\n\n\033[0m' "$lint_rules" "$path"
+        false
+    else
+        printf '\033[0;32m\U2705 %s\n\n\033[0m' "$path"
+        true
+    fi
+}
+
+check-yaml-lint() {
+    if ! command -v yamllint > /dev/null 2>&1; then
+        printf '\033[0;31m\U1F6AByamllint is not installed\033[0m'
+        printf '  Installation for Linux'
+        printf '    pip install --user yamllint'
+        printf '  Installation for Mac OS'
+        printf '    brew install yamllint'
+        exit 1
+    fi
+}
+
+for chartName in $( cut -d'/' -f1,2 <<< "$filesToBePushed" | uniq ); do
+    check-yaml-lint
+    # Avoid running 'yamllint' when modified dirs are not charts
+    if [[ $chartName = bitnami/* ]]; then
+        printf '\033[01;33mLinting yaml of %s:\n\033[0m' "$chartName"
+        chartPath="$repoPath"/"$chartName"
+
+        for yaml_file in values.yaml values-production.yaml requirements.yaml Chart.yaml; do
+            if [[ -f "$chartPath"/"$yaml_file" ]] && ! yaml-lint-file "$chartPath"/"$yaml_file"; then
+                failed=1
+            fi
+        done
+
+        for yaml_file in "$chartPath"/templates/*.yaml; do
+            path_basename=templates/$(basename "$yaml_file")
+            if ! yaml-lint-file-render "$chartPath" "$path_basename"; then
+                failed=1
+            fi
+        done
+    fi
+done
+
+if [[ "$failed" = "1" ]]; then
+    printf '\033[0;31m\U1F6ABYAML lint failed. Not pushing\n\n\033[0m'
+else
+    printf '\033[01;33mYAML lint succeeded\n\n\033[0m'
+fi
+
+exit $failed