feat(taskfiles): expose current version based on latest release or dev tag

Taskfile.internal.yml

@@ -8,10 +8,14 @@ tasks:
     prefix: "build image: {{ .SERVICE }}"
     dir: services/{{ .SERVICE }}
     cmd: . ./build.sh
+    env:
+      IMAGE_VERSION: "{{ .VERSION }}"
   start-service:
     prefix: "start: {{ .SERVICE }}"
     dir: services/{{ .SERVICE }}
     cmd: . ./start.sh
+    env:
+      IMAGE_VERSION: "{{ .VERSION }}"
   stop-service:
     prefix: "stop: {{ .SERVICE }}"
     dir: services/{{ .SERVICE }}

Taskfile.yml

@@ -11,6 +11,11 @@ includes:
 
 output: prefixed
 
+vars:
+  # Any build that is not on a tag is a development build.
+  CURRENT_VERSION:
+    sh: git describe --tags --exact-match $(git rev-parse HEAD) 2> /dev/null || echo "dev-$(git rev-parse HEAD)"
+
 tasks:
   build:
     desc: "Builds images for one or more services. Include service names as a space-separated list."
@@ -19,6 +24,7 @@ tasks:
         task: internal:build-images
         vars:
           SERVICE: "{{ .ITEM }}"
+          VERSION: "{{ .CURRENT_VERSION }}"
     prefix: "build: {{ .CLI_ARGS }}"
     dir: services
   start:
@@ -28,6 +34,7 @@ tasks:
         task: internal:start-service
         vars:
           SERVICE: "{{ .ITEM }}"
+          VERSION: "{{ .CURRENT_VERSION }}"
     prefix: "start: {{ .CLI_ARGS }}"
     dir: services
   stop: