From 7d31c4fc1ebf53653f4da9c66f6d7e15ad00f39c Mon Sep 17 00:00:00 2001
From: Jose Diaz-Gonzalez <email@josediazgonzalez.com>
Date: Sat, 24 Oct 2015 00:11:29 -0400
Subject: [PATCH 1/2] Add pre-receive-app plugin trigger

Users can modify the temporary working directory to add or remove any necessary files before an application is processed for deployment.
---
 plugins/20_events/pre-receive-app | 1 +
 plugins/git/commands              | 2 ++
 plugins/tar/commands              | 2 ++
 3 files changed, 5 insertions(+)
 create mode 120000 plugins/20_events/pre-receive-app

diff --git a/plugins/20_events/pre-receive-app b/plugins/20_events/pre-receive-app
new file mode 120000
index 000000000..5178a749f
--- /dev/null
+++ b/plugins/20_events/pre-receive-app
@@ -0,0 +1 @@
+hook
\ No newline at end of file
diff --git a/plugins/git/commands b/plugins/git/commands
index ff2c4c094..783813f12 100755
--- a/plugins/git/commands
+++ b/plugins/git/commands
@@ -21,8 +21,10 @@ git_build_app_repo() {
   find -name .git -prune -exec rm -rf {} \; > /dev/null
 
   if [[ -f Dockerfile ]] && [[ "$([[ -f .env ]] && grep -q BUILDPACK_URL .env; echo $?)" != "0" ]] && [[ ! -f ".buildpacks" ]]; then
+    plugn trigger pre-receive-app "$APP" "dockerfile" "$TMP_WORK_DIR"
     dokku receive "$APP" "dockerfile" "$TMP_WORK_DIR" | sed -u "s/^/"$'\e[1G'"/"
   else
+    plugn trigger pre-receive-app "$APP" "herokuish" "$TMP_WORK_DIR"
     dokku receive "$APP" "herokuish" "$TMP_WORK_DIR" | sed -u "s/^/"$'\e[1G'"/"
   fi
 }
diff --git a/plugins/tar/commands b/plugins/tar/commands
index 519ae4e15..c5773ec17 100755
--- a/plugins/tar/commands
+++ b/plugins/tar/commands
@@ -52,8 +52,10 @@ case "$1" in
     chmod -R u+r "$TMP_WORK_DIR"
 
     if [[ -f Dockerfile ]] && [[ "$([[ -f .env ]] && grep -q BUILDPACK_URL .env; echo $?)" != "0" ]] && [[ ! -f ".buildpacks" ]]; then
+      plugn trigger pre-receive-app "$APP" "dockerfile" "$TMP_WORK_DIR"
       dokku receive "$APP" "dockerfile" "$TMP_WORK_DIR" | sed -u "s/^/"$'\e[1G'"/"
     else
+      plugn trigger pre-receive-app "$APP" "herokuish" "$TMP_WORK_DIR"
       dokku receive "$APP" "herokuish" "$TMP_WORK_DIR" | sed -u "s/^/"$'\e[1G'"/"
     fi
     ;;

From c793dca61aca2efe1b8ca908557c549c032ad72c Mon Sep 17 00:00:00 2001
From: Jose Diaz-Gonzalez <email@josediazgonzalez.com>
Date: Sat, 24 Oct 2015 00:20:54 -0400
Subject: [PATCH 2/2] Add documentation for pre-receive-app trigger

[ci skip]
---
 docs/development/plugin-triggers.md | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/docs/development/plugin-triggers.md b/docs/development/plugin-triggers.md
index 50e7fdb35..b0e77bded 100644
--- a/docs/development/plugin-triggers.md
+++ b/docs/development/plugin-triggers.md
@@ -587,6 +587,25 @@ set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
 nginx -t
 ```
 
+### `pre-receive-app`
+
+- Description: Allows you to customize the contents of an application directory before they are processed for deployment. The `IMAGE_SOURCE_TYPE` can be any of `[herokuish, dockerfile]`
+- Invoked by: `dokku git-hook`, `dokku tar-build-locked`
+- Arguments: `$APP $IMAGE_SOURCE_TYPE $TMP_WORK_DIR`
+- Example:
+
+```shell
+#!/usr/bin/env bash
+# Adds a file called `dokku-is-awesome` to the repository
+# the contents will be the application name
+
+set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+
+APP="$1"; IMAGE_SOURCE_TYPE="$2"; TMP_WORK_DIR="$3"
+
+echo "$APP" > "$TMP_WORK_DIR/dokku-is-awesome"
+```
+
 ### `receive-app`
 
 - Description: Allows you to customize what occurs when an app is received. Normally just triggers an application build.