feat: add build workflows

- enable fetch-depth for code_checkout
- fetch master branch before checking for changed files
- ensure the clean target is called with the default
- improve makefile failure handling
- ensure VAULT_ADDR is set before VAULT_TOKEN

Makefile

@@ -8,7 +8,7 @@ REGISTRY := git.query.consul
 OWNER := unkin
 DATE_TAG := $(shell date +%Y%m%d)
 SUFFIX=$(shell basename $$(mktemp -u) | cut -d . -f 2)
-GIT_BRANCH=$(shell git branch --show-current)
+GIT_BRANCH=$(shell git symbolic-ref --short HEAD 2>/dev/null || echo $$GITHUB_HEAD_REF)
 GIT_COMMIT := $(shell git rev-parse --short HEAD)
 
 # Find all subdirectories under the IMAGES_PATH
@@ -17,7 +17,7 @@ DIRS := $(shell find $(IMAGES_PATH) -mindepth 3 -maxdepth 3 -type d | sed 's|$(I
 .PHONY: list $(DIRS)
 
 .DEFAULT_GOAL := default
-default:
+default: clean
 	./ci/build.sh
 
 # Make all images
@@ -39,9 +39,11 @@ $(DIRS):
 	@echo "Building for $@"
 
 	# Export environment
-	export VAULT_TOKEN=$$(vault write -field=token auth/approle/login role_id=$$VAULT_ROLEID)
-	export VAULT_ADDR=https://vault.service.consul:8200
-	@eval $$(vault kv get -format=json kv/service/packer/builder/env | jq -r '.data.data | to_entries[] | "export \(.key)=\(.value)"')
+	export VAULT_ADDR=https://vault.query.consul:8200
+	export VAULT_TOKEN=$$(vault write -field=token auth/approle/login role_id=$$VAULT_ROLEID) && \
+	eval $$(vault kv get -format=json kv/service/packer/builder/env | jq -r '.data.data | to_entries[] | "export \(.key)=\(.value)"')
+
+	@echo "Environment retrieved for $@"
 
 	# Check if on master branch
 	@if [ "$(GIT_BRANCH)" = "master" ]; then \
@@ -78,8 +80,8 @@ $(DIRS):
 	export SUFFIX=$(SUFFIX) && \
 	export GIT_COMMIT=$(GIT_COMMIT) && \
 	export GIT_BRANCH=$(GIT_BRANCH) && \
-	packer init . && \
-	packer build . )
+	/usr/bin/packer init . && \
+	/usr/bin/packer build . )
 
 	# Update build timestamp and date in Consul if on master branch
 	@if [ "$(GIT_BRANCH)" = "master" ]; then \