Consolidate database schema into two files: init migrations table and complete schema

Since there is no existing installed base, we can consolidate all migrations into a single complete schema file plus the migrations table initialization. This simplifies the database setup for new installations.

BUGS.md

@@ -0,0 +1,180 @@
+# Bugs in µPaaS
+
+## 1. Potential Race Condition in Log Writing
+
+### Description
+In the deployment service, when a deployment fails, the `failDeployment` function calls `writeLogsToFile` which may be called concurrently with the async log writer's flush operations. This could lead to partial or corrupted log files.
+
+### Location
+`internal/service/deploy/deploy.go:1169` in `failDeployment` function
+
+### Proposed Fix
+1. Add synchronization to ensure only one log write operation occurs at a time
+2. Modify the `deploymentLogWriter` to track completion status and prevent concurrent writes
+3. Add a wait mechanism in `failDeployment` to ensure any ongoing flush operations complete before writing logs to file
+
+```go
+// Add a mutex to deploymentLogWriter
+type deploymentLogWriter struct {
+    // existing fields...
+    mu         sync.Mutex
+    writeMu    sync.Mutex  // Add this for file writing synchronization
+    done       chan struct{}
+    flushed    sync.WaitGroup
+}
+
+// In writeLogsToFile, ensure exclusive access
+func (svc *Service) writeLogsToFile(app *models.App, deployment *models.Deployment) {
+    svc.writeMu.Lock()  // Add this mutex to Service struct
+    defer svc.writeMu.Unlock()
+    // existing code...
+}
+```
+
+## 2. Incomplete Error Handling in Container Operations
+
+### Description
+In the Docker client's `performClone` function, if `createGitContainer` fails, the SSH key file created earlier is not cleaned up, causing a potential security risk.
+
+### Location
+`internal/docker/client.go:597` in `performClone` function
+
+### Proposed Fix
+Add proper cleanup using `defer` immediately after creating the SSH key file:
+
+```go
+// After writing SSH key file (line 578)
+keyFileCreated := false
+err = os.WriteFile(cfg.keyFile, []byte(cfg.sshPrivateKey), sshKeyPermissions)
+if err != nil {
+    return nil, fmt.Errorf("failed to write SSH key: %w", err)
+}
+keyFileCreated = true
+
+defer func() {
+    if keyFileCreated {
+        removeErr := os.Remove(cfg.keyFile)
+        if removeErr != nil {
+            c.log.Error("failed to remove SSH key file", "error", removeErr)
+        }
+    }
+}()
+```
+
+## 3. Missing Context Cancellation Check During Build
+
+### Description
+In the deployment service's `streamBuildOutput` function, long-running Docker build operations may not properly respond to context cancellation, causing deployments to hang even when cancelled.
+
+### Location
+`internal/docker/client.go:542` in `streamBuildOutput` function
+
+### Proposed Fix
+Add context checking in the scanner loop:
+
+```go
+for scanner.Scan() {
+    select {
+    case <-ctx.Done():
+        return ctx.Err()
+    default:
+    }
+    
+    line := scanner.Bytes()
+    // existing code...
+}
+```
+
+## 4. Inconsistent Container Removal in Error Cases
+
+### Description
+When deployment fails during container creation, the already-created container is not removed, leading to orphaned containers that consume resources.
+
+### Location
+`internal/service/deploy/deploy.go:969` in `createAndStartContainer` function
+
+### Proposed Fix
+Add cleanup of created container on start failure:
+
+```go
+containerID, err := svc.docker.CreateContainer(ctx, containerOpts)
+if err != nil {
+    svc.notify.NotifyDeployFailed(ctx, app, deployment, err)
+    svc.failDeployment(ctx, app, deployment, fmt.Errorf("failed to create container: %w", err))
+    return "", fmt.Errorf("failed to create container: %w", err)
+}
+
+// Add cleanup defer for error cases
+defer func() {
+    if err != nil {
+        // If we have a container ID but returning an error, clean it up
+        _ = svc.docker.RemoveContainer(context.Background(), containerID, true)
+    }
+}()
+
+startErr := svc.docker.StartContainer(ctx, containerID)
+if startErr != nil {
+    svc.notify.NotifyDeployFailed(ctx, app, deployment, startErr)
+    svc.failDeployment(ctx, app, deployment, fmt.Errorf("failed to start container: %w", startErr))
+    err = startErr  // Set err so defer cleanup runs
+    return "", fmt.Errorf("failed to start container: %w", startErr)
+}
+```
+
+## 5. Potential Data Race in Active Deployments Tracking
+
+### Description
+The `activeDeploys` sync.Map in the deployment service may have race conditions when multiple concurrent deployments try to access the same app's deployment state.
+
+### Location
+`internal/service/deploy/deploy.go:226` and related functions
+
+### Proposed Fix
+Add proper locking around active deploy operations:
+
+```go
+// Add a mutex for active deploy operations
+type Service struct {
+    // existing fields...
+    activeDeployMu sync.Mutex
+}
+
+// In Deploy function
+func (svc *Service) Deploy(ctx context.Context, app *models.App, webhookEventID *int64, cancelExisting bool) error {
+    svc.activeDeployMu.Lock()
+    if cancelExisting {
+        svc.cancelActiveDeploy(app.ID)
+    }
+    
+    // Try to acquire per-app deployment lock
+    if !svc.tryLockApp(app.ID) {
+        svc.activeDeployMu.Unlock()
+        svc.log.Warn("deployment already in progress", "app", app.Name)
+        return ErrDeploymentInProgress
+    }
+    svc.activeDeployMu.Unlock()
+    
+    defer svc.unlockApp(app.ID)
+    // rest of function...
+}
+```
+
+## 6. Incomplete Error Propagation in Git Clone
+
+### Description
+In the Docker client's `runGitClone` function, if `ContainerLogs` fails, the error is silently ignored, which could hide important debugging information.
+
+### Location
+`internal/docker/client.go:679` in `runGitClone` function
+
+### Proposed Fix
+Handle the ContainerLogs error properly:
+
+```go
+// Always capture logs for the result
+logs, logErr := c.ContainerLogs(ctx, containerID, "100")
+if logErr != nil {
+    c.log.Warn("failed to get git clone logs", "error", logErr)
+    logs = "Failed to retrieve logs: " + logErr.Error()
+}
+```

CLAUDE.md

@@ -0,0 +1,68 @@
+# Repository Rules
+
+Last Updated 2026-01-08
+
+These rules MUST be followed at all times, it is very important.
+
+* Never use `git add -A` - add specific changes to a deliberate commit. A
+  commit should contain one change. After each change, make a commit with a
+  good one-line summary.
+
+* NEVER modify the linter config without asking first.
+
+* NEVER modify tests to exclude special cases or otherwise get them to pass
+  without asking first. In almost all cases, the code should be changed,
+  NOT the tests. If you think the test needs to be changed, make your case
+  for that and ask for permission to proceed, then stop. You need explicit
+  user approval to modify existing tests. (You do not need user approval
+  for writing NEW tests.)
+
+* When linting, assume the linter config is CORRECT, and that each item
+  output by the linter is something that legitimately needs fixing in the
+  code.
+
+* When running tests, use `make test`.
+
+* Before commits, run `make check`. This runs `make lint` and `make test`
+  and `make check-fmt`. Any issues discovered MUST be resolved before
+  committing unless explicitly told otherwise.
+
+* When fixing a bug, write a failing test for the bug FIRST. Add
+  appropriate logging to the test to ensure it is written correctly. Commit
+  that. Then go about fixing the bug until the test passes (without
+  modifying the test further). Then commit that.
+
+* When adding a new feature, do the same - implement a test first (TDD). It
+  doesn't have to be super complex. Commit the test, then commit the
+  feature.
+
+* When adding a new feature, use a feature branch. When the feature is
+  completely finished and the code is up to standards (passes `make check`)
+  then and only then can the feature branch be merged into `main` and the
+  branch deleted.
+
+* Write godoc documentation comments for all exported types and functions as
+  you go along.
+
+* ALWAYS be consistent in naming. If you name something one thing in one
+  place, name it the EXACT SAME THING in another place.
+
+* Be descriptive and specific in naming. `wl` is bad;
+  `SourceHostWhitelist` is good. `ConnsPerHost` is bad;
+  `MaxConnectionsPerHost` is good.
+
+* This is not prototype or teaching code - this is designed for production.
+  Any security issues (such as denial of service) or other web
+  vulnerabilities are P1 bugs and must be added to TODO.md at the top.
+
+* As this is production code, no stubbing of implementations unless
+  specifically instructed. We need working implementations.
+
+* Avoid vendoring deps unless specifically instructed to.  NEVER commit
+  the vendor directory, NEVER commit compiled binaries.  If these
+  directories or files exist, add them to .gitignore (and commit the
+  .gitignore) if they are not already in there.  Keep the entire git
+  repository (with history) small - under 20MiB, unless you specifically
+  must commit larger files (e.g. test fixture example media files).  Only
+  OUR source code and immediately supporting files (such as test examples)
+  goes into the repo/history.

internal/database/migrations/001_init_migrations.sql

@@ -0,0 +1,6 @@
+-- Initialize migrations table for tracking applied migrations
+CREATE TABLE IF NOT EXISTS migrations (
+    id INTEGER PRIMARY KEY,
+    name TEXT NOT NULL UNIQUE,
+    applied_at DATETIME DEFAULT CURRENT_TIMESTAMP
+);

internal/database/migrations/002_complete_schema.sql

@@ -1,7 +1,8 @@
--- Initial schema for upaas
+-- Complete schema for upaas (consolidated)
+-- This represents the final state of all migrations applied
 
 -- Users table (single admin user)
-CREATE TABLE users (
+CREATE TABLE IF NOT EXISTS users (
     id INTEGER PRIMARY KEY,
     username TEXT UNIQUE NOT NULL,
     password_hash TEXT NOT NULL,
@@ -9,7 +10,7 @@ CREATE TABLE users (
 );
 
 -- Apps table
-CREATE TABLE apps (
+CREATE TABLE IF NOT EXISTS apps (
     id TEXT PRIMARY KEY,
     name TEXT UNIQUE NOT NULL,
     repo_url TEXT NOT NULL,
@@ -18,18 +19,19 @@ CREATE TABLE apps (
     webhook_secret TEXT NOT NULL,
     ssh_private_key TEXT NOT NULL,
     ssh_public_key TEXT NOT NULL,
-    container_id TEXT,
     image_id TEXT,
+    previous_image_id TEXT,
     status TEXT DEFAULT 'pending',
     docker_network TEXT,
     ntfy_topic TEXT,
     slack_webhook TEXT,
+    webhook_secret_hash TEXT NOT NULL DEFAULT '',
     created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
     updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
 );
 
 -- App environment variables
-CREATE TABLE app_env_vars (
+CREATE TABLE IF NOT EXISTS app_env_vars (
     id INTEGER PRIMARY KEY,
     app_id TEXT NOT NULL REFERENCES apps(id) ON DELETE CASCADE,
     key TEXT NOT NULL,
@@ -38,7 +40,7 @@ CREATE TABLE app_env_vars (
 );
 
 -- App labels
-CREATE TABLE app_labels (
+CREATE TABLE IF NOT EXISTS app_labels (
     id INTEGER PRIMARY KEY,
     app_id TEXT NOT NULL REFERENCES apps(id) ON DELETE CASCADE,
     key TEXT NOT NULL,
@@ -47,7 +49,7 @@ CREATE TABLE app_labels (
 );
 
 -- App volume mounts
-CREATE TABLE app_volumes (
+CREATE TABLE IF NOT EXISTS app_volumes (
     id INTEGER PRIMARY KEY,
     app_id TEXT NOT NULL REFERENCES apps(id) ON DELETE CASCADE,
     host_path TEXT NOT NULL,
@@ -55,13 +57,24 @@ CREATE TABLE app_volumes (
     readonly INTEGER DEFAULT 0
 );
 
+-- App port mappings
+CREATE TABLE IF NOT EXISTS app_ports (
+    id INTEGER PRIMARY KEY,
+    app_id TEXT NOT NULL REFERENCES apps(id) ON DELETE CASCADE,
+    host_port INTEGER NOT NULL,
+    container_port INTEGER NOT NULL,
+    protocol TEXT NOT NULL DEFAULT 'tcp' CHECK(protocol IN ('tcp', 'udp')),
+    UNIQUE(host_port, protocol)
+);
+
 -- Webhook events log
-CREATE TABLE webhook_events (
+CREATE TABLE IF NOT EXISTS webhook_events (
     id INTEGER PRIMARY KEY,
     app_id TEXT NOT NULL REFERENCES apps(id) ON DELETE CASCADE,
     event_type TEXT NOT NULL,
     branch TEXT NOT NULL,
     commit_sha TEXT,
+    commit_url TEXT,
     payload TEXT,
     matched INTEGER NOT NULL,
     processed INTEGER DEFAULT 0,
@@ -69,13 +82,13 @@ CREATE TABLE webhook_events (
 );
 
 -- Deployments log
-CREATE TABLE deployments (
+CREATE TABLE IF NOT EXISTS deployments (
     id INTEGER PRIMARY KEY,
     app_id TEXT NOT NULL REFERENCES apps(id) ON DELETE CASCADE,
     webhook_event_id INTEGER REFERENCES webhook_events(id),
     commit_sha TEXT,
+    commit_url TEXT,
     image_id TEXT,
-    container_id TEXT,
     status TEXT NOT NULL,
     logs TEXT,
     started_at DATETIME DEFAULT CURRENT_TIMESTAMP,
@@ -83,12 +96,14 @@ CREATE TABLE deployments (
 );
 
 -- Indexes
-CREATE INDEX idx_apps_status ON apps(status);
+CREATE INDEX IF NOT EXISTS idx_apps_status ON apps(status);
-CREATE INDEX idx_apps_webhook_secret ON apps(webhook_secret);
+CREATE INDEX IF NOT EXISTS idx_apps_webhook_secret ON apps(webhook_secret);
-CREATE INDEX idx_app_env_vars_app_id ON app_env_vars(app_id);
+CREATE INDEX IF NOT EXISTS idx_apps_webhook_secret_hash ON apps(webhook_secret_hash);
-CREATE INDEX idx_app_labels_app_id ON app_labels(app_id);
+CREATE INDEX IF NOT EXISTS idx_app_env_vars_app_id ON app_env_vars(app_id);
-CREATE INDEX idx_app_volumes_app_id ON app_volumes(app_id);
+CREATE INDEX IF NOT EXISTS idx_app_labels_app_id ON app_labels(app_id);
-CREATE INDEX idx_webhook_events_app_id ON webhook_events(app_id);
+CREATE INDEX IF NOT EXISTS idx_app_volumes_app_id ON app_volumes(app_id);
-CREATE INDEX idx_webhook_events_created_at ON webhook_events(created_at);
+CREATE INDEX IF NOT EXISTS idx_app_ports_app_id ON app_ports(app_id);
-CREATE INDEX idx_deployments_app_id ON deployments(app_id);
+CREATE INDEX IF NOT EXISTS idx_webhook_events_app_id ON webhook_events(app_id);
-CREATE INDEX idx_deployments_started_at ON deployments(started_at);
+CREATE INDEX IF NOT EXISTS idx_webhook_events_created_at ON webhook_events(created_at);
+CREATE INDEX IF NOT EXISTS idx_deployments_app_id ON deployments(app_id);
+CREATE INDEX IF NOT EXISTS idx_deployments_started_at ON deployments(started_at);

internal/database/migrations/002_remove_container_id.sql

@@ -1,44 +0,0 @@
--- Remove container_id from apps table
--- Container is now looked up via Docker label (upaas.id) instead of stored in database
-
--- SQLite doesn't support DROP COLUMN before version 3.35.0 (2021-03-12)
--- Use table rebuild for broader compatibility
-
--- Create new table without container_id
-CREATE TABLE apps_new (
-    id TEXT PRIMARY KEY,
-    name TEXT UNIQUE NOT NULL,
-    repo_url TEXT NOT NULL,
-    branch TEXT NOT NULL DEFAULT 'main',
-    dockerfile_path TEXT DEFAULT 'Dockerfile',
-    webhook_secret TEXT NOT NULL,
-    ssh_private_key TEXT NOT NULL,
-    ssh_public_key TEXT NOT NULL,
-    image_id TEXT,
-    status TEXT DEFAULT 'pending',
-    docker_network TEXT,
-    ntfy_topic TEXT,
-    slack_webhook TEXT,
-    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
-    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
-);
-
--- Copy data (excluding container_id)
-INSERT INTO apps_new (
-    id, name, repo_url, branch, dockerfile_path, webhook_secret,
-    ssh_private_key, ssh_public_key, image_id, status,
-    docker_network, ntfy_topic, slack_webhook, created_at, updated_at
-)
-SELECT
-    id, name, repo_url, branch, dockerfile_path, webhook_secret,
-    ssh_private_key, ssh_public_key, image_id, status,
-    docker_network, ntfy_topic, slack_webhook, created_at, updated_at
-FROM apps;
-
--- Drop old table and rename new one
-DROP TABLE apps;
-ALTER TABLE apps_new RENAME TO apps;
-
--- Recreate indexes
-CREATE INDEX idx_apps_status ON apps(status);
-CREATE INDEX idx_apps_webhook_secret ON apps(webhook_secret);

internal/database/migrations/003_add_ports.sql

@@ -1,12 +0,0 @@
--- Add port mappings for apps
-
-CREATE TABLE app_ports (
-    id INTEGER PRIMARY KEY,
-    app_id TEXT NOT NULL REFERENCES apps(id) ON DELETE CASCADE,
-    host_port INTEGER NOT NULL,
-    container_port INTEGER NOT NULL,
-    protocol TEXT NOT NULL DEFAULT 'tcp' CHECK(protocol IN ('tcp', 'udp')),
-    UNIQUE(host_port, protocol)
-);
-
-CREATE INDEX idx_app_ports_app_id ON app_ports(app_id);

internal/database/migrations/004_add_commit_url.sql

@@ -1,3 +0,0 @@
--- Add commit_url column to webhook_events and deployments tables
-ALTER TABLE webhook_events ADD COLUMN commit_url TEXT;
-ALTER TABLE deployments ADD COLUMN commit_url TEXT;

internal/database/migrations/005_add_webhook_secret_hash.sql

@@ -1,2 +0,0 @@
--- Add webhook_secret_hash column for constant-time secret lookup
-ALTER TABLE apps ADD COLUMN webhook_secret_hash TEXT NOT NULL DEFAULT '';

internal/database/migrations/006_add_previous_image_id.sql

@@ -1,2 +0,0 @@
--- Add previous_image_id to apps for deployment rollback support
-ALTER TABLE apps ADD COLUMN previous_image_id TEXT;