adding Gitea Mirror

Gitea-Mirror.md

@@ -0,0 +1,73 @@
+## Mission
+
+Mirror repositories from one Gitea instance to another, using a private SSH key from a 3rd workstation / server. This keeps the SSH private keypart secure on your own servers and allows for a password to be set on it as desired.
+
+## Setup
+
+  1. Create a new SSH keypair to use as a Deploy Key on both Gitea instances:
+      ```
+      ssh-keygen -t ed25519 -a 100 -f reposync -C reposync
+      ```
+  2. Add the public keypart to the source repository as a Deploy Key without Write access
+  3. Add the public keypart to the destination repository as a Deploy Key with Write access
+  4. Disable Issues, Projects and Pull Requests on the destination repository (optional)
+
+Gitea allows the same SSH keypair to be used as Deploy Keys for multiple repositories. If using a password on the SSH keypair, leverage `ssh-agent` / `ssh-add` as needed.
+
+## Build Repos
+
+One-time need, prepare the initial repository sync setup and test the initial mirroring.
+
+**buildmirrors.sh**
+```
+#!/usr/bin/env bash
+
+WDIR="${HOME}/repos/mirror"
+cd "${WDIR}" || exit 1
+
+REPOS="repo1 repo2 repo3 repo4"
+USER="frank"
+EMAIL="frank@thetank"
+SSH="ssh -a -o IdentitiesOnly=yes -i ~/.ssh/reposync -F /dev/null"
+SRC="git@src.gitea.server:frankthetank"
+DST="git@dst.gitea.server:frankthetank"
+
+for repo in ${REPOS}; do
+  GIT_SSH_COMMAND="${SSH}" git clone --mirror ${SRC}/${repo}.git
+  if [[ -d ${repo}.git ]]; then
+    pushd "$(pwd)" >/dev/null
+    cd ${repo}.git
+    git config core.sshCommand "${SSH}"
+    git config user.name "${USER}"
+    git config user.email "${EMAIL}"
+    git remote set-url --push origin ${DST}/${repo}.git
+    git fetch -p origin
+    git push --mirror
+    popd >/dev/null
+    sleep 1
+  fi
+done
+```
+
+## Mirror Repos
+
+To be used to keep the repos mirrored over time, whether automated or manual.
+
+**repomirror.sh**
+```
+#!/usr/bin/env bash
+
+WDIR="${HOME}/repos/mirror"
+cd "${WDIR}" || exit 1
+
+for repo in *.git/; do
+  if [[ -d "${repo}" && ! -L "${repo}" ]]; then
+    pushd "$(pwd)" >/dev/null
+    cd "${repo}"
+    git fetch -q -p origin
+    git push -q --mirror
+    popd >/dev/null
+    sleep 1
+  fi
+done
+```

_Sidebar.md

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 - [[Git Quickstart]]
 - [[Git Rewrite User]]
 - [[Git Server]]
+- [[Gitea Mirror]]
 - [[GitLab Anchors]]
 - [[Glibc IPv4]]
 - [[GnuPG Things]]