Merge pull request #43 from cisagov/improvement/enhance_bump_version_…

…script

Enhance the `bump_version.sh` script

README.md

@@ -30,7 +30,7 @@ against any directory that houses `.pkr.hcl` files.
 ```yaml
 repos:
   - repo: https://github.com/cisagov/pre-commit-packer
-    rev: v0.0.2
+    rev: v0.1.0
     hooks:
       - id: packer_fmt
       - id: packer_validate

bump-version

@@ -0,0 +1,155 @@
+#!/usr/bin/env bash
+
+# bump-version [--push] [--label LABEL] (major | minor | patch | prerelease | build | finalize | show)
+
+set -o nounset
+set -o errexit
+set -o pipefail
+
+VERSION_FILE=config/version.txt
+README_FILE=README.md
+
+USAGE=$(
+  cat << END_OF_LINE
+Update the version of the project.
+
+Usage:
+  ${0##*/} [--push] [--label LABEL] (major | minor | patch | prerelease | build | finalize | show)
+  ${0##*/} (-h | --help)
+
+Options:
+  -h | --help    Show this message.
+  --push         Perform a \`git push\` after updating the version.
+  --label LABEL  Specify the label to use when updating the build or prerelease version.
+END_OF_LINE
+)
+
+old_version=$(< "$VERSION_FILE")
+new_version="$old_version"
+
+bump_part=""
+label=""
+commit_prefix="Bump"
+with_push=false
+commands_with_label=("build" "prerelease")
+commands_with_prerelease=("major" "minor" "patch")
+with_prerelease=false
+
+#######################################
+# Display an error message, the help information, and exit with a non-zero status.
+# Arguments:
+#   Error message.
+#######################################
+function invalid_option() {
+  echo "$1"
+  echo "$USAGE"
+  exit 1
+}
+
+#######################################
+# Bump the version using the provided command.
+# Arguments:
+#   The version to bump.
+#   The command to bump the version.
+# Returns:
+#   The new version.
+#######################################
+function bump_version() {
+  local temp_version
+  temp_version=$(python -c "import semver; print(semver.parse_version_info('$1').${2})")
+  echo "$temp_version"
+}
+
+if [ $# -eq 0 ]; then
+  echo "$USAGE"
+  exit 1
+else
+  while [ $# -gt 0 ]; do
+    case $1 in
+      --push)
+        if [ "$with_push" = true ]; then
+          invalid_option "Push has already been set."
+        fi
+
+        with_push=true
+        shift
+        ;;
+      --label)
+        if [ -n "$label" ]; then
+          invalid_option "Label has already been set."
+        fi
+
+        label="$2"
+        shift 2
+        ;;
+      build | finalize | major | minor | patch)
+        if [ -n "$bump_part" ]; then
+          invalid_option "Only one version part should be bumped at a time."
+        fi
+
+        bump_part="$1"
+        shift
+        ;;
+      prerelease)
+        with_prerelease=true
+        shift
+        ;;
+      show)
+        echo "$old_version"
+        exit 0
+        ;;
+      -h | --help)
+        echo "$USAGE"
+        exit 0
+        ;;
+      *)
+        invalid_option "Invalid option: $1"
+        ;;
+    esac
+  done
+fi
+
+if [ -n "$label" ] && [ "$with_prerelease" = false ] && [[ ! " ${commands_with_label[*]} " =~ [[:space:]]${bump_part}[[:space:]] ]]; then
+  invalid_option "Setting the label is only allowed for the following commands: ${commands_with_label[*]}"
+fi
+
+if [ "$with_prerelease" = true ] && [[ ! " ${commands_with_prerelease[*]} " =~ [[:space:]]${bump_part}[[:space:]] ]]; then
+  invalid_option "Changing the prerelease is only allowed in conjunction with the following commands: ${commands_with_prerelease[*]}"
+fi
+
+label_option=""
+if [ -n "$label" ]; then
+  label_option="token='$label'"
+fi
+
+if [ -n "$bump_part" ]; then
+  if [ "$bump_part" = "finalize" ]; then
+    commit_prefix="Finalize"
+    bump_command="finalize_version()"
+  elif [ "$bump_part" = "build" ]; then
+    bump_command="bump_${bump_part}($label_option)"
+  else
+    bump_command="bump_${bump_part}()"
+  fi
+  new_version=$(bump_version "$old_version" "$bump_command")
+  echo Changing version from "$old_version" to "$new_version"
+fi
+
+if [ "$with_prerelease" = true ]; then
+  bump_command="bump_prerelease($label_option)"
+  temp_version=$(bump_version "$new_version" "$bump_command")
+  echo Changing version from "$new_version" to "$temp_version"
+  new_version="$temp_version"
+fi
+
+tmp_file=/tmp/version.$$
+sed "s/$old_version/$new_version/" $VERSION_FILE > $tmp_file
+mv $tmp_file $VERSION_FILE
+sed "s/$old_version/$new_version/" $README_FILE > $tmp_file
+mv $tmp_file $README_FILE
+git add $VERSION_FILE $README_FILE
+git commit --message "$commit_prefix version from $old_version to $new_version"
+
+if [ "$with_push" = true ]; then
+  git push
+fi

config/version.txt

@@ -1 +1 @@
-0.0.2
+0.1.0

requirements-dev.txt

@@ -1,3 +1,3 @@
 --requirement requirements-test.txt
 ipython
-semver
+semver>=3