Multilabel

src/commands/get-largest-tag.yml

@@ -0,0 +1,8 @@
+description: >
+  Exports the largest tag in the repo as an Env Var.
+steps:
+  - checkout
+  - run:
+      command: |
+        LARGEST_TAG=$(git tag | grep -E ^([vV])\(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)\\.(0|[1-9][0-9]*)$ | sort -r --version-sort | head -n1)
+        echo "export LARGEST_TAG=${LARGEST_TAG}" >> "$BASH_ENV"

src/commands/get-last-tag.yml

@@ -1,5 +1,5 @@
 description: >
-  Exports the last tag as an Env Var.
+  Exports the last tag of this branch as an Env Var.
 steps:
   - checkout
   - run:

src/scripts/export-tag.sh

@@ -1,25 +1,25 @@
 COMMIT_SHA=$(eval echo "$SHA")
 echo "Commit hash: $COMMIT_SHA"
+
+# valid semvar for consideration must contain a "v" prefix and no postfix
 NAT='0|[1-9][0-9]*'
 SEMVER_REGEX="\
-^[vV]?\
+^([vV]?\
 ($NAT)\\.($NAT)\\.($NAT)$"
 
 REPO_NAME="${CIRCLE_PROJECT_REPONAME}"
 
-PR_NUMBER=$(curl -s -X GET -u "$USER":"$GIT_USER_TOKEN" https://api.github.com/search/issues?q="$COMMIT_SHA" | jq .items[0].number)
-
-LABEL=$(curl -s -X GET -u "$USER":"$GIT_USER_TOKEN" https://api.github.com/repos/"$REPO_NAME"/issues/"$PR_NUMBER"/labels  | jq .[0].name -r)
+# choose the first/most recent PR that this commit is part of - might have issues picking between multiple prs
+PR_NUMBER=$(curl -s -X GET -H "Authorization: token $GIT_USER_TOKEN" https://api.github.com/search/issues?q="$COMMIT_SHA" | jq .items[0].number)
 
-if [ "$LABEL" == null ] || [ "$LABEL" == "WIP" ]
-then
-    LABEL="patch"
-fi
+# select all the labels of this PR
+LABELS=$(curl -s -X GET -H "Authorization: token $GIT_USER_TOKEN" https://api.github.com/repos/"$REPO_NAME"/issues/"$PR_NUMBER"/labels | jq .[].name -r | grep -Ei "^(major|minor|patch)$" | tr '[:upper:]' '[:lower:]' | tr "\n" " ")
 
-LAST_TAG=$(git describe --tags --abbrev=0 | sed -e "s/^$PREFIX//")
+# to ensure uniqueness, find the highest semvar of any tag in the repo
+LARGEST_TAG=$(git tag | grep -E "$SEMVER_REGEX" | sort -r --version-sort | head -n1)
 
-echo "Last Tag: $LAST_TAG"
-echo "Semver part to update: $LABEL"
+echo "Largest Tag: $LARGEST_TAG"
+echo "Labels: $LABELS"
 
 # Show error message.
 function error {
@@ -33,10 +33,11 @@ function validate_version {
     echo "$version"
     if [[ "$version" =~ $SEMVER_REGEX ]]; then
     if [ "$#" -eq "2" ]; then
-        local major=${BASH_REMATCH[1]}
-        local minor=${BASH_REMATCH[2]}
-        local patch=${BASH_REMATCH[3]}
-        eval "$2=(\"$major\" \"$minor\" \"$patch\")"
+        local prefix=${BASH_REMATCH[1]}
+        local major=${BASH_REMATCH[2]}
+        local minor=${BASH_REMATCH[3]}
+        local patch=${BASH_REMATCH[4]}
+        eval "$2=(\"$prefix\" \"$major\" \"$minor\" \"$patch\")"
     else
         echo "$version"
     fi
@@ -49,23 +50,43 @@ function validate_version {
 function increment {
     local new; local version; local command;
 
-    command=$LABEL
-    version=$LAST_TAG
+    commands=$LABELS
+
+    # no labels count as "patch"
+    if [ "$commands" == null ] || [ -z "$commands" ]; then
+        commands="patch"
+    fi
+
+    version=$LARGEST_TAG
 
     validate_version "$version" parts
+
     # shellcheck disable=SC2154
-    local major="${parts[0]}"
-    local minor="${parts[1]}"
-    local patch="${parts[2]}"
+    local prefix="${parts[0]}"
+    local major="${parts[1]}"
+    local minor="${parts[2]}"
+    local patch="${parts[3]}"
+
+    local has_major=0;
+    local has_minor=0;
+    local new="$version"
 
-    case "$command" in
-    major) new="$((major + 1)).0.0";;
-    minor) new="${major}.$((minor + 1)).0";;
-    patch) new="${major}.${minor}.$((patch + 1))";;
-    esac
+    for command in $commands; do
+        if [ "$command" = "major" ]; then
+            new="$((major + 1)).0.0"
+            has_major=1
+        elif [ "$command" = "minor" ] && [ $has_major -eq 0 ]; then
+            new="${major}.$((minor + 1)).0"
+            has_minor=1
+        elif [ "$command" = "patch" ] && [ $has_major -eq 0 ] && [ $has_minor -eq 0 ]; then
+            new="${major}.${minor}.$((patch + 1))"
+        elif [ "$command" = "wip" ] && [ $has_major -eq 0 ] && [ $has_minor -eq 0 ]; then
+            new="${major}.${minor}.$((patch + 1))"
+        fi
+    done
 
     echo "$new"
-    echo "export NEW_SEMVER_TAG=${PREFIX}${new}" >> "$BASH_ENV"
+    echo "export NEW_SEMVER_TAG=${prefix}${new}" >> "$BASH_ENV"
 
     if [ -z "$NEW_SEMVER_TAG" ]
     then