# TRUEREF-0019 — Git-Native Version Indexing and Corporate Deployment Support

**Priority:** P1
**Status:** Pending
**Depends On:** TRUEREF-0001, TRUEREF-0002
**Blocks:** —

---

## Overview

TrueRef is intended for corporate environments where developers work with private repositories hosted on Bitbucket Server/Data Center and self-hosted GitLab instances. This feature covers two tightly related concerns:

1. **Git-native version indexing** — resolve version tags to specific commit hashes, extract file trees per commit using `git archive`, and store indexed snippets against an exact commit rather than a floating label.
2. **Corporate deployment support** — run TrueRef inside Docker with access to private remotes, per-host credentials, and corporate CA certificates without requiring changes to the host machine beyond environment variables and file mounts.

Together these allow a team to deploy TrueRef once, point it at their internal repositories, and have it return version-accurate documentation to LLM assistants.

---

## Part 1: Git-Native Version Indexing

### Background

Currently, versions are registered manually with a tag and a title. There is no link between a version tag and a specific git commit, so re-indexing the same version after a branch has moved produces different results silently. For documentation retrieval to be trustworthy, each indexed version must be pinned to an immutable commit hash.

### Version → Commit Hash Resolution

Git tags are the canonical mapping. Both lightweight and annotated tags must be handled:

```sh
# Resolves any tag, branch, or ref to the underlying commit hash
git -C /path/to/repo rev-parse <tag>^{commit}
```

The `^{commit}` peel dereferences annotated tag objects to the commit they point at.

For GitHub-hosted repositories the GitHub REST API provides the same mapping without requiring a local clone:

```
GET /repos/{owner}/{repo}/git/refs/tags/{tag}
```

If the returned object type is `tag` (annotated), a second request is required to dereference it:

```
GET /repos/{owner}/{repo}/git/tags/{sha}
→ { object: { sha: "<commit-sha>", type: "commit" } }
```

### Schema Change

Add `commit_hash` to the versions table:

```sql
ALTER TABLE versions ADD COLUMN commit_hash TEXT;
```

Populated at version registration time. Re-indexing a version always uses the stored commit hash, never re-resolves the tag (tags can be moved; the stored hash is immutable).

### Tag Auto-Discovery

When a repository is added or re-fetched, TrueRef should discover all version tags automatically and propose them to the user rather than requiring manual entry:

```sh
git -C /path/to/repo tag -l
# → ["v1.0.0", "v1.1.0", "v2.0.0", ...]
```

For each tag, resolve to a commit hash and pre-populate the versions table. The user can then select which versions to index from the UI.

### Per-Version File Extraction via `git archive`

`git archive` extracts a clean file tree from any commit without disturbing the working directory or requiring a separate clone:

```sh
git -C /path/to/repo archive <commit-hash> | tar -x -C /tmp/trueref-idx/<repo>-<tag>/
```

Advantages over `git checkout` or worktrees:
- Working directory is completely untouched
- No `.git` directory in the output (cleaner for parsing)
- Temp directory deleted after indexing with no git state to clean up
- Multiple versions can be extracted in parallel

The indexing pipeline receives the extracted temp directory as its source path — identical to the existing local crawler interface.

```
trigger index v2.0.0
  → look up commit_hash = "a3f9c12"
  → git archive a3f9c12 | tar -x /tmp/trueref/repo-v2.0.0/
  → run crawler on /tmp/trueref/repo-v2.0.0/
  → store snippets { repo_id, version_tag, commit_hash }
  → rm -rf /tmp/trueref/repo-v2.0.0/
```

### trueref.json Explicit Override

Allow commit hashes to be pinned explicitly per version, overriding tag resolution. Useful when tags are mutable, versioning is non-standard, or a specific patch within a release must be targeted:

```json
{
  "previousVersions": [
    {
      "tag": "v2.0.0",
      "title": "Version 2.0.0",
      "commitHash": "a3f9c12abc..."
    }
  ]
}
```

### Edge Cases

| Case | Handling |
|------|----------|
| Annotated tags | `rev-parse <tag>^{commit}` peels to commit automatically |
| Mutable tags (e.g. `latest`) | Re-resolve on re-index; warn in UI if hash has changed |
| Branch as version | `rev-parse origin/<branch>^{commit}` gives tip; re-resolves on re-index |
| Shallow clone | Run `git fetch --unshallow` before `git archive` if commit is unavailable |
| Submodules | `git archive --recurse-submodules` or document as a known limitation |
| Git LFS | `git lfs pull` required after archive if LFS-tracked files are needed for indexing |

### Acceptance Criteria

- [ ] `versions` table has a `commit_hash` column with a migration
- [ ] `resolveTagToCommit(repoPath, tag): string` utility using `child_process`
- [ ] Tag auto-discovery runs on repo registration and on manual re-fetch
- [ ] Discovered tags appear in the UI with their resolved commit hashes
- [ ] Indexing a version extracts files via `git archive` to a temp directory
- [ ] Temp directory is deleted after indexing completes (success or failure)
- [ ] Snippets are stored with both `version_tag` and `commit_hash`
- [ ] `trueref.json` `commitHash` field overrides tag resolution when present
- [ ] Re-indexing a version with a moved tag warns the user if the hash has changed

---

## Part 2: Corporate Deployment Support

### Background

Corporate environments introduce three constraints not present in standard cloud setups:

1. **Multiple private git remotes** — typically Bitbucket Server/Data Center and self-hosted GitLab on separate hostnames, each requiring independent credentials.
2. **Credential management on Windows** — Git Credential Manager stores credentials in the Windows Credential Manager (DPAPI-encrypted), which is inaccessible from inside a Linux container. Personal Access Tokens passed as environment variables are the correct substitute.
3. **Custom CA certificates** — on-premise servers use certificates issued by corporate CAs not trusted by default in Linux container images. All git operations, HTTP requests, and Node.js `fetch` calls fail until the CA is registered at the OS level.

### Multi-Remote Credential Configuration

Two environment variables carry the HTTPS tokens, one per remote. Git's per-host credential scoping routes each token to the correct server:

```sh
# In docker-entrypoint.sh, before any git operation

if [ -n "$GIT_TOKEN_BITBUCKET" ] && [ -n "$BITBUCKET_HOST" ]; then
  git config --global \
    "credential.https://${BITBUCKET_HOST}.helper" \
    "!f() { echo username=x-token-auth; echo password=\$GIT_TOKEN_BITBUCKET; }; f"
fi

if [ -n "$GIT_TOKEN_GITLAB" ] && [ -n "$GITLAB_HOST" ]; then
  git config --global \
    "credential.https://${GITLAB_HOST}.helper" \
    "!f() { echo username=oauth2; echo password=\$GIT_TOKEN_GITLAB; }; f"
fi
```

Username conventions by server type:

| Server | HTTPS username | Password |
|--------|---------------|----------|
| Bitbucket Server / Data Center | `x-token-auth` | HTTP access token |
| Bitbucket Cloud | account username | App password |
| GitLab (self-hosted or cloud) | `oauth2` | Personal access token |
| GitLab deploy token | `gitlab-deploy-token` | Deploy token secret |

SSH authentication is also supported and preferred for long-lived deployments. The host SSH configuration (`~/.ssh/config`) handles per-host key selection and travels into the container via volume mount.

### Corporate CA Certificate Handling

The CA certificate is mounted as a read-only file at a staging path. The entrypoint detects the encoding (PEM or DER) and installs it at the system level before any other operation runs:

```sh
if [ -f /certs/corp-ca.crt ]; then
  if openssl x509 -inform PEM -in /certs/corp-ca.crt -noout 2>/dev/null; then
    cp /certs/corp-ca.crt /usr/local/share/ca-certificates/corp-ca.crt
  else
    openssl x509 -inform DER -in /certs/corp-ca.crt \
      -out /usr/local/share/ca-certificates/corp-ca.crt
  fi
  update-ca-certificates 2>/dev/null
fi
```

Installing at the OS level means git, curl, and Node.js `fetch` all trust the certificate without per-tool flags. `GIT_SSL_NO_VERIFY` is explicitly not used.

`openssl` must be added to the production image:

```dockerfile
RUN apk add --no-cache openssl
```

### SSH Key Permissions

Windows NTFS does not track Unix permissions. SSH keys mounted from `%USERPROFILE%\.ssh` arrive with world-readable permissions that the SSH client rejects. The entrypoint corrects this before any git operation:

```sh
if [ -d /root/.ssh ]; then
  chmod 700 /root/.ssh
  chmod 600 /root/.ssh/* 2>/dev/null || true
fi
```

### docker-compose.yml

```yaml
services:
  web:
    build: .
    ports:
      - "3000:3000"
    volumes:
      - trueref-data:/data
      - ${USERPROFILE}/.ssh:/root/.ssh:ro
      - ${USERPROFILE}/.gitconfig:/root/.gitconfig:ro
      - ${CORP_CA_CERT}:/certs/corp-ca.crt:ro
    environment:
      DATABASE_URL: /data/trueref.db
      GIT_TOKEN_BITBUCKET: "${BITBUCKET_TOKEN}"
      GIT_TOKEN_GITLAB: "${GITLAB_TOKEN}"
      BITBUCKET_HOST: "${BITBUCKET_HOST}"
      GITLAB_HOST: "${GITLAB_HOST}"
    restart: unless-stopped

  mcp:
    build: .
    command: mcp
    ports:
      - "3001:3001"
    environment:
      TRUEREF_API_URL: http://web:3000
      MCP_PORT: "3001"
    depends_on:
      - web
    restart: unless-stopped

volumes:
  trueref-data:
```

### .env Template

```env
# Corporate CA certificate (PEM or DER, auto-detected)
CORP_CA_CERT=C:/path/to/corp-ca.crt

# Git remote hostnames
BITBUCKET_HOST=bitbucket.corp.example.com
GITLAB_HOST=gitlab.corp.example.com

# Personal access tokens (never commit these)
BITBUCKET_TOKEN=
GITLAB_TOKEN=
```

### Full docker-entrypoint.sh

```sh
#!/bin/sh
set -e

# 1. Trust corporate CA — must run first
if [ -f /certs/corp-ca.crt ]; then
  if openssl x509 -inform PEM -in /certs/corp-ca.crt -noout 2>/dev/null; then
    cp /certs/corp-ca.crt /usr/local/share/ca-certificates/corp-ca.crt
  else
    openssl x509 -inform DER -in /certs/corp-ca.crt \
      -out /usr/local/share/ca-certificates/corp-ca.crt
  fi
  update-ca-certificates 2>/dev/null
fi

# 2. Fix SSH key permissions (Windows mounts arrive world-readable)
if [ -d /root/.ssh ]; then
  chmod 700 /root/.ssh
  chmod 600 /root/.ssh/* 2>/dev/null || true
fi

# 3. Per-host HTTPS credential helpers
if [ -n "$GIT_TOKEN_BITBUCKET" ] && [ -n "$BITBUCKET_HOST" ]; then
  git config --global \
    "credential.https://${BITBUCKET_HOST}.helper" \
    "!f() { echo username=x-token-auth; echo password=\$GIT_TOKEN_BITBUCKET; }; f"
fi

if [ -n "$GIT_TOKEN_GITLAB" ] && [ -n "$GITLAB_HOST" ]; then
  git config --global \
    "credential.https://${GITLAB_HOST}.helper" \
    "!f() { echo username=oauth2; echo password=\$GIT_TOKEN_GITLAB; }; f"
fi

case "${1:-web}" in
  web)
    echo "Running database migrations..."
    DATABASE_URL="$DATABASE_URL" npx drizzle-kit migrate
    echo "Starting TrueRef web app on port ${PORT:-3000}..."
    exec node build
    ;;
  mcp)
    MCP_PORT="${MCP_PORT:-3001}"
    echo "Starting TrueRef MCP HTTP server on port ${MCP_PORT}..."
    exec npx tsx src/mcp/index.ts --transport http --port "$MCP_PORT"
    ;;
  *)
    exec "$@"
    ;;
esac
```

### Acceptance Criteria

- [ ] `docker-entrypoint.sh` runs CA install, SSH permission fix, and credential helpers in that order before any other operation
- [ ] CA cert mount path is `/certs/corp-ca.crt`; PEM and DER are both handled without user intervention
- [ ] `openssl` is installed in the production Docker image
- [ ] Per-host credential helpers are configured only when the relevant env vars are set (no-op if absent)
- [ ] SSH key permissions are corrected unconditionally when `/root/.ssh` exists
- [ ] `docker-compose.yml` exposes `BITBUCKET_HOST`, `GITLAB_HOST`, `GIT_TOKEN_BITBUCKET`, `GIT_TOKEN_GITLAB`, and `CORP_CA_CERT` as first-class configuration points
- [ ] `.env.example` includes all corporate deployment variables with placeholder values
- [ ] README Docker section documents the corporate setup (cert export on Windows, SSH mount, per-host tokens)

---

## Files to Create

- `Dockerfile`
- `docker-compose.yml`
- `docker-entrypoint.sh`
- `.dockerignore`
- `.env.example` (update)

## Files to Modify

- `src/lib/server/db/schema.ts` — add `commit_hash` to versions table
- `src/lib/server/db/migrations/` — new migration for `commit_hash`
- `src/lib/server/services/version.service.ts` — `resolveTagToCommit`, tag auto-discovery
- `src/lib/server/pipeline/indexing.pipeline.ts` — `git archive` extraction, temp dir lifecycle
- `README.md` — Docker section, corporate deployment guide