Hermes Agent を非公開 GitHub にバックアップして復旧を確認する

umask 077
install -d -m 700 /PRIVATE-KEY-STORE
age-keygen -o /PRIVATE-KEY-STORE/hermes-backup-identity.txt
age-keygen -y /PRIVATE-KEY-STORE/hermes-backup-identity.txt

gh repo create ACCOUNT/PRIVATE-REPOSITORY --private --clone
gh repo view ACCOUNT/PRIVATE-REPOSITORY --json isPrivate --jq .isPrivate
cd PRIVATE-REPOSITORY
git remote set-url origin git@github.com:ACCOUNT/PRIVATE-REPOSITORY.git
git remote get-url --all origin
git remote get-url --push --all origin
git branch -M main
printf '%s\n' 'Encrypted Hermes backup storage; ciphertext and checksum only.' > README.md
git add README.md
git commit -m 'Initialize private backup repository'
git push -u origin HEAD:main
git ls-remote --heads origin main

install -d -m 700 /ABSOLUTE/PRIVATE-SETUP
cd /ABSOLUTE/PRIVATE-SETUP

#!/usr/bin/env bash
# Documentation-based Linux sample for an operator to review and adapt.
# Place with hermes-github-backup.conf under the owning HERMES_HOME/scripts/.
# Requires GNU stat -c and du -sb. Git Bash was used only for inert fixtures.
set -Eeuo pipefail
umask 077

script_dir=$(CDPATH= cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P)
owning_home=$(CDPATH= cd -- "$script_dir/.." && pwd -P)
if [[ -n ${HERMES_HOME:-} && $(CDPATH= cd -- "$HERMES_HOME" && pwd -P) != "$owning_home" ]]; then
  printf 'Backup stopped: cron profile and script directory differ.\n' >&2
  exit 1
fi
export HERMES_HOME="$owning_home"

config="$script_dir/hermes-github-backup.conf"
[[ -f "$config" ]] || { printf 'Backup stopped: reviewed configuration missing.\n' >&2; exit 1; }
# This file is local, owner-reviewed shell configuration. It must contain no secret.
# shellcheck source=/dev/null
source "$config"
: "${HERMES_BIN:?set an absolute Hermes executable path}"
: "${REPO_DIR:?set an absolute private clone path}"
: "${STAGING_PARENT:?set an absolute private staging path}"
: "${AGE_RECIPIENT:?set an age public recipient}"
: "${EXPECTED_REMOTE:?set the exact private GitHub SSH remote}"
: "${BRANCH:=main}"

fail() { printf 'Backup stopped: %s.\n' "$1" >&2; exit 1; }
for path in "$HERMES_BIN" "$REPO_DIR" "$STAGING_PARENT"; do
  [[ $path == /* ]] || fail 'a configured path is not absolute'
done
[[ -x "$HERMES_BIN" ]] || fail 'Hermes executable unavailable'
[[ $AGE_RECIPIENT == age1* ]] || fail 'age public recipient invalid'
[[ $EXPECTED_REMOTE == git@github.com:*/*.git ]] || fail 'remote is not the reviewed GitHub SSH URL'
[[ $BRANCH =~ ^[a-zA-Z0-9._/-]+$ ]] || fail 'branch name invalid'
[[ -d "$STAGING_PARENT" ]] || fail 'staging directory unavailable'
stage_parent=$(CDPATH= cd -- "$STAGING_PARENT" && pwd -P)
[[ $stage_parent != "$owning_home" && $stage_parent != "$owning_home"/* ]] || fail 'staging is inside Hermes data'

# Atomic, nonblocking whole-flow lock: keep it through push and remote readback.
# A stale directory after a crash requires operator inspection; never steal it.
lockdir="$stage_parent/.hermes-github-backup-flow.lock"
mkdir -- "$lockdir" 2>/dev/null || fail 'another backup flow holds the lock or a stale lock needs review'
work=''
cleanup() {
  if [[ -n $work ]]; then
    rm -f -- "$work/hermes.zip" "$work/latest.zip.age" "$work/latest.sha256" "$work/backup.log"
    rmdir -- "$work" 2>/dev/null || true
  fi
  rmdir -- "$lockdir" 2>/dev/null || true
}
trap cleanup EXIT

[[ -d "$REPO_DIR/.git" ]] || fail 'Git repository unavailable'
repo=$(CDPATH= cd -- "$REPO_DIR" && pwd -P)
[[ $repo != "$owning_home" && $repo != "$owning_home"/* ]] || fail 'repository is inside Hermes data'
[[ $stage_parent != "$repo" && $stage_parent != "$repo"/* ]] || fail 'staging is inside Git repository'
[[ $repo != "$stage_parent"/* ]] || fail 'Git repository is inside staging'

command -v age >/dev/null || fail 'age unavailable'
command -v gh >/dev/null || fail 'GitHub CLI unavailable for private visibility check'
command -v unzip >/dev/null || fail 'zip verifier unavailable'
command -v git >/dev/null || fail 'Git unavailable'
remote_repo=${EXPECTED_REMOTE#git@github.com:}
remote_repo=${remote_repo%.git}
visibility=$(gh repo view "$remote_repo" --json isPrivate --jq .isPrivate 2>/dev/null) || fail 'GitHub repository visibility unreadable'
[[ $visibility == true ]] || fail 'GitHub repository is not confirmed private'
raw_fetch_urls=$(git -C "$repo" config --get-all remote.origin.url) || fail 'Git fetch URL missing'
[[ $raw_fetch_urls == "$EXPECTED_REMOTE" ]] || fail 'Git has multiple or unexpected raw fetch URLs'
raw_push_urls=$(git -C "$repo" config --get-all remote.origin.pushurl || true)
[[ -z $raw_push_urls ]] || fail 'separate Git pushurl requires independent review'
effective_fetch_urls=$(git -C "$repo" remote get-url --all origin) || fail 'effective fetch URL unreadable'
effective_push_urls=$(git -C "$repo" remote get-url --push --all origin) || fail 'effective push URL unreadable'
[[ $effective_fetch_urls == "$EXPECTED_REMOTE" ]] || fail 'Git fetch URL rewrite or extra destination'
[[ $effective_push_urls == "$EXPECTED_REMOTE" ]] || fail 'Git push URL rewrite or extra destination'
[[ $(git -C "$repo" branch --show-current) == "$BRANCH" ]] || fail 'local branch changed'
[[ -z $(git -C "$repo" status --porcelain --untracked-files=all) ]] || fail 'repository has unrelated changes'

# No interactive prompt is possible in an unattended Hermes cron tick.
export GIT_TERMINAL_PROMPT=0
export GIT_SSH_COMMAND='ssh -o BatchMode=yes'
remote_head=$(git -C "$repo" ls-remote --heads origin "$BRANCH" | awk '{print $1}')
[[ -n $remote_head && $remote_head == "$(git -C "$repo" rev-parse HEAD)" ]] || fail 'remote unreadable or branch has changed'

work=$(mktemp -d "$stage_parent/hermes-backup.XXXXXXXX") || fail 'private staging creation failed'

if "$HERMES_BIN" backup -o "$work/hermes.zip" >"$work/backup.log" 2>&1; then
  :
else
  backup_rc=$?
  fail "Hermes full backup returned $backup_rc; temporary zip/log will be removed, so diagnose with a separate controlled manual run"
fi
[[ -s "$work/hermes.zip" ]] || fail 'Hermes archive absent or empty'
unzip -tq "$work/hermes.zip" >"$work/backup.log" 2>&1 || fail 'zip integrity check failed'
age -r "$AGE_RECIPIENT" -o "$work/latest.zip.age" "$work/hermes.zip" >"$work/backup.log" 2>&1 || fail 'archive encryption failed'
[[ -s "$work/latest.zip.age" ]] || fail 'encrypted archive absent or empty'

# Deliberately below GitHub's 50 MiB warning. Git history retains every version.
cipher_bytes=$(stat -c %s "$work/latest.zip.age")
(( cipher_bytes <= 40000000 )) || fail 'encrypted archive exceeds this small-repository recipe'
git_bytes=$(du -sb "$repo/.git" | awk '{print $1}')
(( git_bytes + cipher_bytes + 10000000 <= 500000000 )) || fail 'repository history approaches the review limit'
hash=$(sha256sum "$work/latest.zip.age" | awk '{print $1}')
printf '%s  latest.zip.age\n' "$hash" >"$work/latest.sha256"

cp -- "$work/latest.zip.age" "$repo/latest.zip.age"
cp -- "$work/latest.sha256" "$repo/latest.sha256"
git -C "$repo" add -- latest.zip.age latest.sha256
staged=$(git -C "$repo" diff --cached --name-only)
[[ $staged == $'latest.sha256\nlatest.zip.age' ]] || fail 'staged paths are not the two reviewed files'
git -C "$repo" diff --cached --check >/dev/null || fail 'staged content check failed'
git -C "$repo" commit -m "Encrypted Hermes backup $(date -u +%Y-%m-%dT%H:%M:%SZ)" >/dev/null || fail 'local backup commit failed'
run_head=$(git -C "$repo" rev-parse HEAD)
(( $(du -sb "$repo/.git" | awk '{print $1}') <= 500000000 )) || fail 'Git history exceeds review limit before push'
[[ $(git -C "$repo" rev-parse HEAD) == "$run_head" ]] || fail 'local HEAD changed before push'
git -C "$repo" push origin "$run_head:refs/heads/$BRANCH" >/dev/null || fail 'remote push failed; inspect exact remote before retrying'
remote_head=$(git -C "$repo" ls-remote --heads origin "$BRANCH" | awk '{print $1}')
[[ $remote_head == "$run_head" ]] || fail 'this run commit not confirmed at remote'
printf 'Encrypted backup verified at private remote commit %s.\n' "$run_head"

# No passwords, tokens, age identities or private keys belong here.
HERMES_BIN=/absolute/path/to/hermes
REPO_DIR=/absolute/path/to/dedicated-private-github-clone
STAGING_PARENT=/absolute/path/to/private-staging-outside-hermes-and-git
AGE_RECIPIENT=age1replace_with_operator_public_recipient
EXPECTED_REMOTE=git@github.com:ACCOUNT/PRIVATE-REPOSITORY.git
BRANCH=main

export HERMES_HOME=/absolute/path/to/owning-hermes-data-root
install -d -m 700 /ABSOLUTE/PRIVATE-STAGING
install -d -m 700 "$HERMES_HOME/scripts"
install -m 700 hermes-github-backup.sh "$HERMES_HOME/scripts/hermes-github-backup.sh"
install -m 600 hermes-github-backup.conf "$HERMES_HOME/scripts/hermes-github-backup.conf"
"$HERMES_HOME/scripts/hermes-github-backup.sh"

hermes cron create '0 3 * * *' --no-agent --script hermes-github-backup.sh --deliver local --name 'Encrypted Hermes backup'
hermes cron list
hermes cron status
hermes cron doctor

umask 077
unset HERMES_HOME
git clone git@github.com:ACCOUNT/PRIVATE-REPOSITORY.git /PRIVATE-RECOVERY/hermes-backup-clone
cd /PRIVATE-RECOVERY/hermes-backup-clone
sha256sum -c latest.sha256
age --decrypt -i /PRIVATE-KEY-STORE/hermes-backup-identity.txt -o /PRIVATE-RECOVERY/hermes.zip latest.zip.age
unzip -tq /PRIVATE-RECOVERY/hermes.zip
hermes import /PRIVATE-RECOVERY/hermes.zip
hermes setup
hermes cron list