From dda2e048623413157a8a637babb31567434b69b9 Mon Sep 17 00:00:00 2001
From: winterb <winterb@uni-greifswald.de>
Date: Fri, 23 Feb 2024 12:28:43 +0100
Subject: [PATCH] WIP++; added check functions; also include closed; doc

---
 migrate_assignments.sh | 51 +++++++++++++++++++++++++++++++-----------
 1 file changed, 38 insertions(+), 13 deletions(-)

diff --git a/migrate_assignments.sh b/migrate_assignments.sh
index eefb725..1e4e21b 100755
--- a/migrate_assignments.sh
+++ b/migrate_assignments.sh
@@ -1,4 +1,6 @@
 #!/bin/bash
+# Migrate assignments for Gitea-Issues after a Gitea2Gitea-Migration
+# 2024 Benjamin Winter
 set -eu
 
 readonly PROGNAME=`/usr/bin/basename $0`
@@ -18,9 +20,23 @@ print_help()
 {
 cat << "EOF"
 PURPOSE
-    this script will start in DRY MODE by default - see --GO parameter
+- Migrate assignments for Gitea-Issues after a Gitea2Gitea-Migration
+    - issues must have the same ID on both systems
+    - users must have the same NAME on both systems
+- example
+    - OLD: https://oldgitea.example.com/my_organisation/my_repository
+    - NEW: https://newgitea.example.com/my_organisation/my_repository
+- Typical Workflow
+    1. migrate your repository from your OLD Gitea instance to your NEW one
+    2. use this script to migrate the assignments
 
-INSTALLATION AND PREPERATION
+INFORMATION
+- this script will start in DRY MODE by default - see --GO parameter
+- this script will check the environment and stops on any error
+- this script will check the OLD and NEW repository for inconsistencies
+- if your titles include a ¬ character, the script may could behave funny as this i used as separator
+
+INSTALLATION AND PREPARATION
 - install
     - jq - Command-line JSON processor
     - tea: https://gitea.com/gitea/tea
@@ -35,7 +51,7 @@ INSTALLATION AND PREPERATION
     - tea login add --name OLD --url https://oldgitea.example.com --token 123456789123456789
     - tea login add --name NEW --url https://newgitea.example.com --token 123459789123456789
 
-USAGE
+    USAGE
     -h | --help      print this help
     -r | --repo      required, i.e. "my_organisation/my_repository"
     -o | --login_old required, tea-id of your old login
@@ -98,23 +114,32 @@ if [[ -z "$repo" || -z "$login_old" || -z "$login_new" ]] ; then error_in_or_out
 #
 # START
 #
+if $dry_run; then echo -e "###\n### DRY RUN - will not change anything\n###"; fi
 
 # check commands
 checkCommand tea
 checkCommand jq
 
+# get data
+echo -e "\n# checking access to OLD (\"$login_old\") and NEW (\"$login_new\")"
+json_old=$(tea issues list --output json --login "$login_old" --repo "$repo" --state all --fields index,assignees,title)
+json_new=$(tea issues list --output json --login "$login_new" --repo "$repo" --state all --fields index,assignees,title)
 
-if $dry_run; then echo -e "###\n### DRY RUN - will not change anything\n###"; fi
-
-str=$(tea issues list --output json --login "$login_old" --repo "$repo" --fields index,title,assignees)
-
-while IFS="¬"; read -r index title assignees; do
-    echo "processing issue #${index} - \"${title}\", assigned to ${assignees}"
-done< <(echo "$str" | jq --raw-output '.[] | "\(.index)¬\(.title)¬\(.assignees)"')
+# check data
+readonly json_old_ids=$(echo "$json_old" | jq ".[] | .index")
+readonly json_new_ids=$(echo "$json_new" | jq ".[] | .index")
+if [[ "$json_old_ids" != "$json_new_ids" ]]; then
+    echo >&2 "OLD repositories' ids differ from NEW repository. Aborting.";
+    echo >&2 "OLD repositories' ids: $(echo "$json_old_ids" | tr '\n' ,)";
+    echo >&2 "NEW repositories' ids: $(echo "$json_new_ids" | tr '\n' ,)";
+    exit 3;
+fi
 
 
-#tea issues list --output simple --login NEW
-#tea issues list --output simple --login NEW --repo eine_tolle_organisation/ein_tolles_repository
+# process data
+while IFS="¬"; read -r index assignees title; do
+    echo "processing issue #${index} - \"${title}\", assigned to \"${assignees}\""
+done< <(echo "$json_old" | jq --raw-output '.[] | "\(.index)¬\(.assignees)¬\(.title)"')
+
 
 exit 0
-