refactor: move git-sha flag to git:report

docs/appendices/0.20.0-migration-guide.md

@@ -45,6 +45,11 @@ Dokku will no longer distribute packages for Debian versions that are not `stabl
 - Debian 7 (wheezy)
 - Debian 8 (jessie)
 
+### App report flags
+
+The following changes on the `apps:report` command were made in this release
+
+- The `--git-sha` flag was moved from the `apps:report` command to the `git:report` command.
 ## Deprecations
 
 - `nginx:show-conf` has been deprecated in favor of `nginx:show-config`.

docs/deployment/application-management.md

@@ -236,16 +236,14 @@ dokku apps:report
 ```
 =====> node-js-app
        App dir:             /home/dokku/node-js-app
-       Git sha:             dbddc3f
-       Deploy source:       git
-       Locked:              false
+       App deploy source:   git
+       App locked:          false
 =====> python-sample
 not deployed
 =====> ruby-sample
        App dir:             /home/dokku/ruby-sample
-       Git sha:             a2d477c
-       Deploy source:       git
-       Locked:              false
+       App deploy source:   git
+       App locked:          false
 ```
 
 You can run the command for a specific app also.
@@ -257,13 +255,12 @@ dokku apps:report node-js-app
 ```
 =====> node-js-app
        App dir:             /home/dokku/node-js-app
-       Git sha:             dbddc3f
-       Deploy source:       git
-       Locked:              false
+       App deploy source:   git
+       App locked:          false
 ```
 
 You can pass flags which will output only the value of the specific information you want. For example:
 
 ```shell
-dokku apps:report node-js-app --git-sha
+dokku apps:report node-js-app --app-dir
 ```

plugins/git/internal-functions

@@ -31,6 +31,7 @@ cmd-git-report() {
 
 cmd-git-report-single() {
   declare APP="$1" INFO_FLAG="$2"
+  local APP_DIR="$DOKKU_ROOT/$APP"
   if [[ "$INFO_FLAG" == "true" ]]; then
     INFO_FLAG=""
   fi
@@ -40,6 +41,7 @@ cmd-git-report-single() {
     "--git-global-deploy-branch: $(fn-plugin-property-get "git" "--global" "deploy-branch" "master")"
     "--git-keep-git-dir: $(fn-plugin-property-get "git" "$APP" "keep-git-dir" "false")"
     "--git-rev-env-var: $(fn-plugin-property-get "git" "$APP" "rev-env-var" "GIT_REV")"
+    "--git-sha: $(GIT_DIR="$APP_DIR" git rev-parse --short HEAD 2>/dev/null || false)"
   )
 
   if [[ -z "$INFO_FLAG" ]]; then