From 61a3bb607cee62b4abb800f0c6cecfb660c61bce Mon Sep 17 00:00:00 2001
From: Aza Tulepbergenov <atulep@google.com>
Date: Mon, 3 Apr 2023 15:24:04 -0700
Subject: [PATCH 01/11] feat: adds script.

---
 .../git-migrate-history.sh                    | 146 ++++++++++++++++++
 scripts/split_repo_migration/run.sh           |  54 +++++++
 2 files changed, 200 insertions(+)
 create mode 100755 scripts/split_repo_migration/git-migrate-history.sh
 create mode 100644 scripts/split_repo_migration/run.sh

diff --git a/scripts/split_repo_migration/git-migrate-history.sh b/scripts/split_repo_migration/git-migrate-history.sh
new file mode 100755
index 000000000000..c3ab951452ea
--- /dev/null
+++ b/scripts/split_repo_migration/git-migrate-history.sh
@@ -0,0 +1,146 @@
+#!/bin/bash
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -ex
+
+if [ $# -lt 4 ]
+then
+  echo "Usage: $0 <source-repo> <target-repo> <source-path> <target-path> [folders,to,skip] [files,to,keep] [branch-name]"
+  exit 1
+fi
+
+# source GitHub repository. format: <owner>/<repo>
+SOURCE_REPO=$1
+
+# destination GitHub repository. format: <owner>/<repo>
+TARGET_REPO=$2
+
+# path in the source repo to copy code from. Defaults to the root directory
+SOURCE_PATH=$3
+
+# path in the target repo to put the copied code
+TARGET_PATH=$4
+
+# comma-separated list of files/folders to skip
+IGNORE_FOLDERS=$5
+# keep these specific files that would otherwise be deleted by IGNORE_FOLDERS
+KEEP_FILES=$6
+
+# override the HEAD branch name for the migration PR
+BRANCH=$7
+
+if [[ ! -z "${UPDATE_SCRIPT}" ]]
+then
+  UPDATE_SCRIPT=$(realpath "${UPDATE_SCRIPT}")
+fi
+
+if [[ -z "${BRANCH}" ]]
+then
+  # default the branch name to be generated from the source repo name
+  BRANCH=$(basename ${SOURCE_REPO})-migration
+fi
+echo "here"
+export FILTER_BRANCH_SQUELCH_WARNING=1
+
+# create a working directory
+WORKDIR=$(mktemp -d -t code-migration-XXXXXXXXXX)
+echo "Created working directory: ${WORKDIR}"
+
+pushd "${WORKDIR}"  # cd into workdir
+
+echo "Cloning source repository: ${SOURCE_REPO}"
+git clone "git@github.com:${SOURCE_REPO}.git" source-repo
+
+pushd source-repo
+git remote remove origin
+
+# prune only files within the specified directory
+if [[ ! -z "${SOURCE_PATH}" ]]
+then
+  echo "Pruning commits only including path: ${SOURCE_PATH}"
+  git filter-branch \  # rewrites history... unsafe
+    --prune-empty \
+    --subdirectory-filter "${SOURCE_PATH}"
+fi
+
+if [[ ! -z "${IGNORE_FOLDERS}" ]]
+then
+  echo "Ignoring folder: ${IGNORE_FOLDERS}"
+  mkdir -p ${WORKDIR}/filtered-source
+  FOLDERS=$(echo ${IGNORE_FOLDERS} | tr "," " ")
+  # remove files/folders we don't want
+  FILTER="(rm -rf ${FOLDERS} || true)"
+  if [[ ! -z "${KEEP_FILES}" ]]
+  then
+    KEEP_FILES_SPACES=($(echo ${KEEP_FILES} | tr "," " "))
+    LAST_ELEMENT=$(( ${#KEEP_FILES_SPACES[@]} - 1 ))
+    KEEP_FILE_COMMANDS=""
+    for file in "${KEEP_FILES_SPACES[@]}"
+    do
+      if [[ $file == "${KEEP_FILES_SPACES[$LAST_ELEMENT]}" ]]
+      then
+        KEEP_FILE_COMMANDS+="git checkout -- ${file} 2>/dev/null || true"
+      else 
+        KEEP_FILE_COMMANDS+="git checkout -- ${file} 2>/dev/null || true; "
+      fi   
+    done
+    # restore files to keep, silence errors if the file doesn't exist
+    FILTER="${FILTER}; ${KEEP_FILE_COMMANDS}"
+  fi
+  git filter-branch \
+    --force \
+    --prune-empty \
+    --tree-filter "${FILTER}"
+fi
+
+# reorganize the filtered code into the desired target locations
+if [[ ! -z "${TARGET_PATH}" ]]
+then
+  echo "Moving files to destination path: ${TARGET_PATH}"
+  git filter-branch \
+    --force \
+    --prune-empty \
+    --tree-filter \
+      "shopt -s dotglob; mkdir -p ${WORKDIR}/migrated-source; mv * ${WORKDIR}/migrated-source; mkdir -p ${TARGET_PATH}; mv ${WORKDIR}/migrated-source/* ${TARGET_PATH}"
+fi
+
+# back to workdir
+popd
+
+# merge histories
+echo "Cloning target repository: ${SOURCE_REPO}"
+git clone "git@github.com:${TARGET_REPO}.git" target-repo
+pushd target-repo
+
+git remote add --fetch migration ../source-repo
+git checkout -b "${BRANCH}"
+git merge --allow-unrelated-histories migration/main --no-edit
+
+if [[ ! -z "${UPDATE_SCRIPT}" ]]
+then
+  bash "${UPDATE_SCRIPT}"
+fi
+echo "Success"
+# git push -u origin "${BRANCH}" --force
+
+# # create pull request
+# if gh --help > /dev/null
+# then
+#   gh pr create --title "migrate code from ${SOURCE_REPO}"
+# else
+#   hub pull-request -m "migrate code from ${SOURCE_REPO}"
+# fi
+
+popd
\ No newline at end of file
diff --git a/scripts/split_repo_migration/run.sh b/scripts/split_repo_migration/run.sh
new file mode 100644
index 000000000000..bd40af6cf710
--- /dev/null
+++ b/scripts/split_repo_migration/run.sh
@@ -0,0 +1,54 @@
+#!/bin/bash
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+ 
+set -e
+ 
+if [ $# -lt 2 ]
+then
+  echo "Usage: $0 <split-repo-name> <target-path>"
+  exit 1
+fi
+ 
+# repo name (e.g. nodejs-asset)
+SPLIT_REPO=$1
+# destination directory (e.g. google-cloud-asset)
+ARTIFACT_NAME=$2
+ 
+## Get the directory of the build script
+SCRIPT_DIR=$(realpath $(dirname "${BASH_SOURCE[0]}"))
+ 
+#export UPDATE_SCRIPT="${SCRIPT_DIR}/split-repo-post-process.sh"
+export PACKAGE_PATH="packages/${ARTIFACT_NAME}"
+ 
+# Args to migrate git
+# 1. source GitHub repository. format: <owner>/<repo>
+# 2. destination GitHub repository. format: <owner>/<repo>
+# 3. path in the source repo to copy code from. Defaults to the root directory
+# 4. path in the target repo to put the copied code
+# 5. comma-separated list of files/folders to skip
+# 6. keep these specific files that would otherwise be deleted by IGNORE_FOLDERS
+# 7. override the HEAD branch name for the migration PR
+
+echo ${PACKAGE_PATH}
+
+# run the migrate script, remove .kokoro and .github folders
+# keep the .github/.OwlBot.yaml config
+${SCRIPT_DIR}/git-migrate-history.sh \
+  "googleapis/${SPLIT_REPO}" \
+  "googleapis/google-cloud-python" \
+  "" \
+  "${PACKAGE_PATH}" \
+  ".kokoro,.github,.trampolinerc,SECURITY.md,renovate.json,samples" \
+  ".github/.OwlBot.yaml"

From 2c1e1e47a9e90341be7b159b1139f8834e8a15ae Mon Sep 17 00:00:00 2001
From: Aza Tulepbergenov <atulep@google.com>
Date: Thu, 6 Apr 2023 18:35:30 -0700
Subject: [PATCH 02/11] feat: fix some bugs.

---
 .../git-migrate-history.sh                    | 23 +++++++++++++++++--
 scripts/split_repo_migration/run.sh           |  2 +-
 2 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/scripts/split_repo_migration/git-migrate-history.sh b/scripts/split_repo_migration/git-migrate-history.sh
index c3ab951452ea..3e51b6138103 100755
--- a/scripts/split_repo_migration/git-migrate-history.sh
+++ b/scripts/split_repo_migration/git-migrate-history.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-# Copyright 2022 Google LLC
+# Copyright 2023 Google LLC
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -133,7 +133,26 @@ then
   bash "${UPDATE_SCRIPT}"
 fi
 echo "Success"
-# git push -u origin "${BRANCH}" --force
+
+popd # back to workdir
+
+# Do a diff between source code split repl and migrated code.
+git clone "git@github.com:${SOURCE_REPO}.git" source-repo-validation  # Not ideal to clone again.
+rm -rf source-repo-validation/.git  # That folder is not needed for validation.
+
+if diff -r target-repo/"${TARGET_PATH}" source-repo-validation; then
+  echo "No diff"
+else
+  echo "Diff non-empty"
+  exit 1
+fi
+
+pushd target-repo  # To target repo
+
+# Uncomment this to push to branch and create a pull request.
+# BRANCH here is something like python-speech-migration.
+
+# git push -u origin "${BRANCH}" --force  
 
 # # create pull request
 # if gh --help > /dev/null
diff --git a/scripts/split_repo_migration/run.sh b/scripts/split_repo_migration/run.sh
index bd40af6cf710..637c0e2a6282 100644
--- a/scripts/split_repo_migration/run.sh
+++ b/scripts/split_repo_migration/run.sh
@@ -50,5 +50,5 @@ ${SCRIPT_DIR}/git-migrate-history.sh \
   "googleapis/google-cloud-python" \
   "" \
   "${PACKAGE_PATH}" \
-  ".kokoro,.github,.trampolinerc,SECURITY.md,renovate.json,samples" \
+  "" \
   ".github/.OwlBot.yaml"

From fcb0211689477313c351b53fc8c6abcdd4ff4e68 Mon Sep 17 00:00:00 2001
From: Aza Tulepbergenov <atulep@google.com>
Date: Thu, 6 Apr 2023 18:52:36 -0700
Subject: [PATCH 03/11] feat: add update script.

---
 scripts/split_repo_migration/git-migrate-history.sh | 3 +++
 scripts/split_repo_migration/run.sh                 | 3 ++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/scripts/split_repo_migration/git-migrate-history.sh b/scripts/split_repo_migration/git-migrate-history.sh
index 3e51b6138103..fca0ada47275 100755
--- a/scripts/split_repo_migration/git-migrate-history.sh
+++ b/scripts/split_repo_migration/git-migrate-history.sh
@@ -41,6 +41,9 @@ KEEP_FILES=$6
 # override the HEAD branch name for the migration PR
 BRANCH=$7
 
+# Path for update script for migration postprocessing.
+UPDATE_SCRIPT=$8
+
 if [[ ! -z "${UPDATE_SCRIPT}" ]]
 then
   UPDATE_SCRIPT=$(realpath "${UPDATE_SCRIPT}")
diff --git a/scripts/split_repo_migration/run.sh b/scripts/split_repo_migration/run.sh
index 637c0e2a6282..2d96799a5344 100644
--- a/scripts/split_repo_migration/run.sh
+++ b/scripts/split_repo_migration/run.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-# Copyright 2022 Google LLC
+# Copyright 2023 Google LLC
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -40,6 +40,7 @@ export PACKAGE_PATH="packages/${ARTIFACT_NAME}"
 # 5. comma-separated list of files/folders to skip
 # 6. keep these specific files that would otherwise be deleted by IGNORE_FOLDERS
 # 7. override the HEAD branch name for the migration PR
+# 8. path for update script.
 
 echo ${PACKAGE_PATH}
 

From 39432b13fe0fb9f68b572db5d590924fef3ae856 Mon Sep 17 00:00:00 2001
From: Aza Tulepbergenov <atulep@google.com>
Date: Thu, 13 Apr 2023 14:53:01 -0700
Subject: [PATCH 04/11] chore: address pr feedback.

---
 .../git-migrate-history.sh                    | 24 ++++++-------------
 1 file changed, 7 insertions(+), 17 deletions(-)

diff --git a/scripts/split_repo_migration/git-migrate-history.sh b/scripts/split_repo_migration/git-migrate-history.sh
index fca0ada47275..004a54a64b09 100755
--- a/scripts/split_repo_migration/git-migrate-history.sh
+++ b/scripts/split_repo_migration/git-migrate-history.sh
@@ -15,10 +15,12 @@
 
 set -ex
 
+[[ "${BASH_SOURCE[0]}" != "${0}" ]] && EXIT=return || EXIT=exit
+
 if [ $# -lt 4 ]
 then
   echo "Usage: $0 <source-repo> <target-repo> <source-path> <target-path> [folders,to,skip] [files,to,keep] [branch-name]"
-  exit 1
+  $EXIT 1
 fi
 
 # source GitHub repository. format: <owner>/<repo>
@@ -41,24 +43,16 @@ KEEP_FILES=$6
 # override the HEAD branch name for the migration PR
 BRANCH=$7
 
-# Path for update script for migration postprocessing.
-UPDATE_SCRIPT=$8
-
-if [[ ! -z "${UPDATE_SCRIPT}" ]]
-then
-  UPDATE_SCRIPT=$(realpath "${UPDATE_SCRIPT}")
-fi
 
 if [[ -z "${BRANCH}" ]]
 then
   # default the branch name to be generated from the source repo name
   BRANCH=$(basename ${SOURCE_REPO})-migration
 fi
-echo "here"
 export FILTER_BRANCH_SQUELCH_WARNING=1
 
 # create a working directory
-WORKDIR=$(mktemp -d -t code-migration-XXXXXXXXXX)
+WORKDIR="$(mktemp -d -t code-migration-XXXXXXXXXX)"
 echo "Created working directory: ${WORKDIR}"
 
 pushd "${WORKDIR}"  # cd into workdir
@@ -81,7 +75,7 @@ fi
 if [[ ! -z "${IGNORE_FOLDERS}" ]]
 then
   echo "Ignoring folder: ${IGNORE_FOLDERS}"
-  mkdir -p ${WORKDIR}/filtered-source
+  mkdir -p "${WORKDIR}/filtered-source"
   FOLDERS=$(echo ${IGNORE_FOLDERS} | tr "," " ")
   # remove files/folders we don't want
   FILTER="(rm -rf ${FOLDERS} || true)"
@@ -131,15 +125,11 @@ git remote add --fetch migration ../source-repo
 git checkout -b "${BRANCH}"
 git merge --allow-unrelated-histories migration/main --no-edit
 
-if [[ ! -z "${UPDATE_SCRIPT}" ]]
-then
-  bash "${UPDATE_SCRIPT}"
-fi
 echo "Success"
 
 popd # back to workdir
 
-# Do a diff between source code split repl and migrated code.
+# Do a diff between source code split repo and migrated code.
 git clone "git@github.com:${SOURCE_REPO}.git" source-repo-validation  # Not ideal to clone again.
 rm -rf source-repo-validation/.git  # That folder is not needed for validation.
 
@@ -147,7 +137,7 @@ if diff -r target-repo/"${TARGET_PATH}" source-repo-validation; then
   echo "No diff"
 else
   echo "Diff non-empty"
-  exit 1
+  $EXIT 1
 fi
 
 pushd target-repo  # To target repo

From 2096df74d759a5096218eb2ea0a1fb049634bfbb Mon Sep 17 00:00:00 2001
From: Aza Tulepbergenov <atulep@google.com>
Date: Thu, 13 Apr 2023 18:03:09 -0700
Subject: [PATCH 05/11] chore: address feedback.

---
 .../git-migrate-history.sh                    | 22 +++++++++----------
 scripts/split_repo_migration/run.sh           |  7 +++---
 2 files changed, 14 insertions(+), 15 deletions(-)

diff --git a/scripts/split_repo_migration/git-migrate-history.sh b/scripts/split_repo_migration/git-migrate-history.sh
index 004a54a64b09..d19d77b4b5ac 100755
--- a/scripts/split_repo_migration/git-migrate-history.sh
+++ b/scripts/split_repo_migration/git-migrate-history.sh
@@ -136,23 +136,21 @@ rm -rf source-repo-validation/.git  # That folder is not needed for validation.
 if diff -r target-repo/"${TARGET_PATH}" source-repo-validation; then
   echo "No diff"
 else
-  echo "Diff non-empty"
+  diff -r target-repo/"${TARGET_PATH}" source-repo-validation > "diff.txt"
+  echo "Diff non-empty. See ${WORKDIR}/diff.txt"
   $EXIT 1
 fi
 
 pushd target-repo  # To target repo
 
-# Uncomment this to push to branch and create a pull request.
-# BRANCH here is something like python-speech-migration.
+git push -u origin "${BRANCH}" --force
 
-# git push -u origin "${BRANCH}" --force  
-
-# # create pull request
-# if gh --help > /dev/null
-# then
-#   gh pr create --title "migrate code from ${SOURCE_REPO}"
-# else
-#   hub pull-request -m "migrate code from ${SOURCE_REPO}"
-# fi
+# create pull request
+if gh --help > /dev/null
+then
+  gh pr create --title "migrate code from ${SOURCE_REPO}"
+else
+  hub pull-request -m "migrate code from ${SOURCE_REPO}"
+fi
 
 popd
\ No newline at end of file
diff --git a/scripts/split_repo_migration/run.sh b/scripts/split_repo_migration/run.sh
index 2d96799a5344..5e461c1f1afb 100644
--- a/scripts/split_repo_migration/run.sh
+++ b/scripts/split_repo_migration/run.sh
@@ -14,11 +14,13 @@
 # limitations under the License.
  
 set -e
- 
+
+[[ "${BASH_SOURCE[0]}" != "${0}" ]] && EXIT=return || EXIT=exit
+
 if [ $# -lt 2 ]
 then
   echo "Usage: $0 <split-repo-name> <target-path>"
-  exit 1
+  $EXIT 1
 fi
  
 # repo name (e.g. nodejs-asset)
@@ -29,7 +31,6 @@ ARTIFACT_NAME=$2
 ## Get the directory of the build script
 SCRIPT_DIR=$(realpath $(dirname "${BASH_SOURCE[0]}"))
  
-#export UPDATE_SCRIPT="${SCRIPT_DIR}/split-repo-post-process.sh"
 export PACKAGE_PATH="packages/${ARTIFACT_NAME}"
  
 # Args to migrate git

From e336cd390e59aa787b6b6a5d59be39dbd36e25d3 Mon Sep 17 00:00:00 2001
From: Aza Tulepbergenov <atulep@google.com>
Date: Tue, 18 Apr 2023 10:41:16 -0700
Subject: [PATCH 06/11] chore: address feedback and change args.

---
 .../git-migrate-history.sh                    | 46 +++++++++------
 scripts/split_repo_migration/run.sh           | 56 -------------------
 2 files changed, 28 insertions(+), 74 deletions(-)
 delete mode 100644 scripts/split_repo_migration/run.sh

diff --git a/scripts/split_repo_migration/git-migrate-history.sh b/scripts/split_repo_migration/git-migrate-history.sh
index d19d77b4b5ac..f89977e44040 100755
--- a/scripts/split_repo_migration/git-migrate-history.sh
+++ b/scripts/split_repo_migration/git-migrate-history.sh
@@ -13,13 +13,25 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Sample usage:
+#
+# git-migrate-history.sh \
+# "googleapis/python-speech" \
+# "~/temp/google-cloud-python" \
+# "" \
+# "" \
+# ".github/.OwlBot.yaml"
+#
+# This invocation runs migration script on python-speech, where the source path is root directory,
+# nothing is ignored, and .OwlBot.yaml is being kept.
+
 set -ex
 
 [[ "${BASH_SOURCE[0]}" != "${0}" ]] && EXIT=return || EXIT=exit
 
-if [ $# -lt 4 ]
+if [ $# -lt 3 ]
 then
-  echo "Usage: $0 <source-repo> <target-repo> <source-path> <target-path> [folders,to,skip] [files,to,keep] [branch-name]"
+  echo "Usage: $0 <source-repo> <target-repo> <source-path> [folders,to,skip] [files,to,keep] [branch-name]"
   $EXIT 1
 fi
 
@@ -27,21 +39,19 @@ fi
 SOURCE_REPO=$1
 
 # destination GitHub repository. format: <owner>/<repo>
-TARGET_REPO=$2
+TARGET_REPO=$2  # Path to google-cloud-python
 
 # path in the source repo to copy code from. Defaults to the root directory
 SOURCE_PATH=$3
 
-# path in the target repo to put the copied code
-TARGET_PATH=$4
-
 # comma-separated list of files/folders to skip
-IGNORE_FOLDERS=$5
+IGNORE_FOLDERS=$4
+
 # keep these specific files that would otherwise be deleted by IGNORE_FOLDERS
-KEEP_FILES=$6
+KEEP_FILES=$5
 
 # override the HEAD branch name for the migration PR
-BRANCH=$7
+BRANCH=$6
 
 
 if [[ -z "${BRANCH}" ]]
@@ -102,6 +112,8 @@ then
     --tree-filter "${FILTER}"
 fi
 
+TARGET_PATH=$(jq -r '.distribution_name' .repo-metadata.json)  # -r removes quotes around the name.
+
 # reorganize the filtered code into the desired target locations
 if [[ ! -z "${TARGET_PATH}" ]]
 then
@@ -117,12 +129,10 @@ fi
 popd
 
 # merge histories
-echo "Cloning target repository: ${SOURCE_REPO}"
-git clone "git@github.com:${TARGET_REPO}.git" target-repo
-pushd target-repo
+pushd $TARGET_REPO
 
-git remote add --fetch migration ../source-repo
-git checkout -b "${BRANCH}"
+git remote add --fetch migration ${WORKDIR}/source-repo
+git checkout -B "${BRANCH}"
 git merge --allow-unrelated-histories migration/main --no-edit
 
 echo "Success"
@@ -133,15 +143,15 @@ popd # back to workdir
 git clone "git@github.com:${SOURCE_REPO}.git" source-repo-validation  # Not ideal to clone again.
 rm -rf source-repo-validation/.git  # That folder is not needed for validation.
 
-if diff -r target-repo/"${TARGET_PATH}" source-repo-validation; then
+DIFF_FILE="${WORKDIR}/diff.txt"
+if diff -r "${TARGET_REPO}/${TARGET_PATH}" source-repo-validation > "${DIFF_FILE}" ; then
   echo "No diff"
 else
-  diff -r target-repo/"${TARGET_PATH}" source-repo-validation > "diff.txt"
-  echo "Diff non-empty. See ${WORKDIR}/diff.txt"
+  echo "Diff non-empty. See ${DIFF_FILE}"
   $EXIT 1
 fi
 
-pushd target-repo  # To target repo
+pushd "${TARGET_REPO}"  # To target repo
 
 git push -u origin "${BRANCH}" --force
 
diff --git a/scripts/split_repo_migration/run.sh b/scripts/split_repo_migration/run.sh
deleted file mode 100644
index 5e461c1f1afb..000000000000
--- a/scripts/split_repo_migration/run.sh
+++ /dev/null
@@ -1,56 +0,0 @@
-#!/bin/bash
-# Copyright 2023 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
- 
-set -e
-
-[[ "${BASH_SOURCE[0]}" != "${0}" ]] && EXIT=return || EXIT=exit
-
-if [ $# -lt 2 ]
-then
-  echo "Usage: $0 <split-repo-name> <target-path>"
-  $EXIT 1
-fi
- 
-# repo name (e.g. nodejs-asset)
-SPLIT_REPO=$1
-# destination directory (e.g. google-cloud-asset)
-ARTIFACT_NAME=$2
- 
-## Get the directory of the build script
-SCRIPT_DIR=$(realpath $(dirname "${BASH_SOURCE[0]}"))
- 
-export PACKAGE_PATH="packages/${ARTIFACT_NAME}"
- 
-# Args to migrate git
-# 1. source GitHub repository. format: <owner>/<repo>
-# 2. destination GitHub repository. format: <owner>/<repo>
-# 3. path in the source repo to copy code from. Defaults to the root directory
-# 4. path in the target repo to put the copied code
-# 5. comma-separated list of files/folders to skip
-# 6. keep these specific files that would otherwise be deleted by IGNORE_FOLDERS
-# 7. override the HEAD branch name for the migration PR
-# 8. path for update script.
-
-echo ${PACKAGE_PATH}
-
-# run the migrate script, remove .kokoro and .github folders
-# keep the .github/.OwlBot.yaml config
-${SCRIPT_DIR}/git-migrate-history.sh \
-  "googleapis/${SPLIT_REPO}" \
-  "googleapis/google-cloud-python" \
-  "" \
-  "${PACKAGE_PATH}" \
-  "" \
-  ".github/.OwlBot.yaml"

From a3694e414ff1e31487b0e43414bc30553a612ccb Mon Sep 17 00:00:00 2001
From: Aza Tulepbergenov <atulep@google.com>
Date: Tue, 18 Apr 2023 17:32:32 -0700
Subject: [PATCH 07/11] chore: address pr feedback.

---
 .../git-migrate-history.sh                    | 23 ++++++++++---------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/scripts/split_repo_migration/git-migrate-history.sh b/scripts/split_repo_migration/git-migrate-history.sh
index f89977e44040..9e3ed6186dd7 100755
--- a/scripts/split_repo_migration/git-migrate-history.sh
+++ b/scripts/split_repo_migration/git-migrate-history.sh
@@ -112,7 +112,7 @@ then
     --tree-filter "${FILTER}"
 fi
 
-TARGET_PATH=$(jq -r '.distribution_name' .repo-metadata.json)  # -r removes quotes around the name.
+TARGET_PATH="packages/$(jq -r '.distribution_name' .repo-metadata.json)"  # -r removes quotes around the name.
 
 # reorganize the filtered code into the desired target locations
 if [[ ! -z "${TARGET_PATH}" ]]
@@ -131,9 +131,10 @@ popd
 # merge histories
 pushd $TARGET_REPO
 
-git remote add --fetch migration ${WORKDIR}/source-repo
+REMOTE="remote.${SOURCE_REPO}"
+git remote add --fetch ${REMOTE} ${WORKDIR}/source-repo
 git checkout -B "${BRANCH}"
-git merge --allow-unrelated-histories migration/main --no-edit
+git merge --allow-unrelated-histories ${REMOTE}/main --no-edit
 
 echo "Success"
 
@@ -153,14 +154,14 @@ fi
 
 pushd "${TARGET_REPO}"  # To target repo
 
-git push -u origin "${BRANCH}" --force
+# git push -u origin "${BRANCH}" --force
 
-# create pull request
-if gh --help > /dev/null
-then
-  gh pr create --title "migrate code from ${SOURCE_REPO}"
-else
-  hub pull-request -m "migrate code from ${SOURCE_REPO}"
-fi
+# # create pull request
+# if gh --help > /dev/null
+# then
+#   gh pr create --title "migrate code from ${SOURCE_REPO}"
+# else
+#   hub pull-request -m "migrate code from ${SOURCE_REPO}"
+# fi
 
 popd
\ No newline at end of file

From 57e96dcc01ace9025e60e75f54d2090558e326c0 Mon Sep 17 00:00:00 2001
From: Aza Tulepbergenov <atulep@google.com>
Date: Wed, 19 Apr 2023 10:49:45 -0700
Subject: [PATCH 08/11] chore: add gh.

---
 .../git-migrate-history.sh                     | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/scripts/split_repo_migration/git-migrate-history.sh b/scripts/split_repo_migration/git-migrate-history.sh
index 9e3ed6186dd7..997041eeb8e9 100755
--- a/scripts/split_repo_migration/git-migrate-history.sh
+++ b/scripts/split_repo_migration/git-migrate-history.sh
@@ -154,14 +154,14 @@ fi
 
 pushd "${TARGET_REPO}"  # To target repo
 
-# git push -u origin "${BRANCH}" --force
-
-# # create pull request
-# if gh --help > /dev/null
-# then
-#   gh pr create --title "migrate code from ${SOURCE_REPO}"
-# else
-#   hub pull-request -m "migrate code from ${SOURCE_REPO}"
-# fi
+git push -u origin "${BRANCH}" --force
+
+# create pull request
+if gh --help > /dev/null
+then
+  gh pr create --title "migrate code from ${SOURCE_REPO}"
+else
+  hub pull-request -m "migrate code from ${SOURCE_REPO}"
+fi
 
 popd
\ No newline at end of file

From c7c0d485aed84ccaf80c82a09ba2cb6889712729 Mon Sep 17 00:00:00 2001
From: Aza Tulepbergenov <atulep@google.com>
Date: Wed, 19 Apr 2023 14:08:34 -0700
Subject: [PATCH 09/11] fix: fix details for post-processor.

---
 .../git-migrate-history.sh                    | 30 +++++++++++--------
 1 file changed, 18 insertions(+), 12 deletions(-)

diff --git a/scripts/split_repo_migration/git-migrate-history.sh b/scripts/split_repo_migration/git-migrate-history.sh
index 997041eeb8e9..d0a541f3190a 100755
--- a/scripts/split_repo_migration/git-migrate-history.sh
+++ b/scripts/split_repo_migration/git-migrate-history.sh
@@ -31,7 +31,7 @@ set -ex
 
 if [ $# -lt 3 ]
 then
-  echo "Usage: $0 <source-repo> <target-repo> <source-path> [folders,to,skip] [files,to,keep] [branch-name]"
+  echo "Usage: $0 <source-repo> <target-repo> <source-path> [folders,to,skip] [files,to,keep] [branch-name] [issue-number]"
   $EXIT 1
 fi
 
@@ -53,6 +53,8 @@ KEEP_FILES=$5
 # override the HEAD branch name for the migration PR
 BRANCH=$6
 
+# GitHub issue number
+ISSUE_NUMBER=$7
 
 if [[ -z "${BRANCH}" ]]
 then
@@ -112,18 +114,16 @@ then
     --tree-filter "${FILTER}"
 fi
 
-TARGET_PATH="packages/$(jq -r '.distribution_name' .repo-metadata.json)"  # -r removes quotes around the name.
+DISTRIBUTION_NAME=$(jq -r '.distribution_name' .repo-metadata.json) # -r removes quotes around the name.
+TARGET_PATH="packages/${DISTRIBUTION_NAME}"
 
 # reorganize the filtered code into the desired target locations
-if [[ ! -z "${TARGET_PATH}" ]]
-then
-  echo "Moving files to destination path: ${TARGET_PATH}"
-  git filter-branch \
-    --force \
-    --prune-empty \
-    --tree-filter \
-      "shopt -s dotglob; mkdir -p ${WORKDIR}/migrated-source; mv * ${WORKDIR}/migrated-source; mkdir -p ${TARGET_PATH}; mv ${WORKDIR}/migrated-source/* ${TARGET_PATH}"
-fi
+echo "Moving files to destination path: ${TARGET_PATH}"
+git filter-branch \
+  --force \
+  --prune-empty \
+  --tree-filter \
+    "shopt -s dotglob; mkdir -p ${WORKDIR}/migrated-source; mv * ${WORKDIR}/migrated-source; mkdir -p ${TARGET_PATH}; mv ${WORKDIR}/migrated-source/* ${TARGET_PATH}"
 
 # back to workdir
 popd
@@ -154,12 +154,18 @@ fi
 
 pushd "${TARGET_REPO}"  # To target repo
 
+# For postprocessing of the batch migration script.
+mkdir -p owl-bot-staging/${DISTRIBUTION_NAME}/${DISTRIBUTION_NAME}
+touch owl-bot-staging/${DISTRIBUTION_NAME}/${DISTRIBUTION_NAME}/${DISTRIBUTION_NAME}.txt
+git add owl-bot-staging
+git commit -m "Trigger owlbot post-processor"
+
 git push -u origin "${BRANCH}" --force
 
 # create pull request
 if gh --help > /dev/null
 then
-  gh pr create --title "migrate code from ${SOURCE_REPO}"
+  gh pr create --title "migrate code from ${SOURCE_REPO}"  --body "feat: Migrate ${SOURCE_REPO} into ${TARGET_PATH} (#${ISSUE_NUMBER})."
 else
   hub pull-request -m "migrate code from ${SOURCE_REPO}"
 fi

From a303e0f8493731e9475f7f5dbf3e9515a2c7c413 Mon Sep 17 00:00:00 2001
From: Aza Tulepbergenov <atulep@google.com>
Date: Wed, 19 Apr 2023 14:42:11 -0700
Subject: [PATCH 10/11] chore: conventional commit.

---
 scripts/split_repo_migration/git-migrate-history.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/split_repo_migration/git-migrate-history.sh b/scripts/split_repo_migration/git-migrate-history.sh
index d0a541f3190a..c17e620000ff 100755
--- a/scripts/split_repo_migration/git-migrate-history.sh
+++ b/scripts/split_repo_migration/git-migrate-history.sh
@@ -165,7 +165,7 @@ git push -u origin "${BRANCH}" --force
 # create pull request
 if gh --help > /dev/null
 then
-  gh pr create --title "migrate code from ${SOURCE_REPO}"  --body "feat: Migrate ${SOURCE_REPO} into ${TARGET_PATH} (#${ISSUE_NUMBER})."
+  gh pr create --title "migrate code from ${SOURCE_REPO}"  --title "feat: Migrate ${SOURCE_REPO} into ${TARGET_PATH} (#${ISSUE_NUMBER})"
 else
   hub pull-request -m "migrate code from ${SOURCE_REPO}"
 fi

From 5c57e45ce1e67904106204549c21a86018f76446 Mon Sep 17 00:00:00 2001
From: Aza Tulepbergenov <atulep@google.com>
Date: Wed, 19 Apr 2023 15:19:51 -0700
Subject: [PATCH 11/11] chore: fix.

---
 scripts/split_repo_migration/git-migrate-history.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/split_repo_migration/git-migrate-history.sh b/scripts/split_repo_migration/git-migrate-history.sh
index c17e620000ff..b6eeb8752986 100755
--- a/scripts/split_repo_migration/git-migrate-history.sh
+++ b/scripts/split_repo_migration/git-migrate-history.sh
@@ -165,7 +165,7 @@ git push -u origin "${BRANCH}" --force
 # create pull request
 if gh --help > /dev/null
 then
-  gh pr create --title "migrate code from ${SOURCE_REPO}"  --title "feat: Migrate ${SOURCE_REPO} into ${TARGET_PATH} (#${ISSUE_NUMBER})"
+  gh pr create --title "feat: Migrate code from ${SOURCE_REPO} into ${TARGET_PATH} (#${ISSUE_NUMBER})" --body "See #${ISSUE_NUMBER}."
 else
   hub pull-request -m "migrate code from ${SOURCE_REPO}"
 fi