feat: add systemd user services and timer units

- Create systemd user service files for both Go and Rust implementations
- Add comprehensive timer configurations: 30-minute, hourly, and daily schedules
- Include security settings, resource limits, and proper service dependencies
- Add justfile recipes for service management (install, enable, disable, status)
- Remove deprecated Makefile in favor of just-based build system
- Fix Rust compilation warnings in imap.rs

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Makefile

@@ -1,119 +0,0 @@
-# Makefile for mail2couch project
-# Builds both Go and Rust implementations with distinct binary names
-
-.PHONY: all build build-go build-rust clean test help install
-
-# Default target
-all: build
-
-# Build both implementations
-build: build-go build-rust
-
-# Build Go implementation as mail2couch-go
-build-go:
-	@echo "Building Go implementation..."
-	cd go && go build -o mail2couch-go .
-	@echo "✅ Built: go/mail2couch-go"
-
-# Build Rust implementation as mail2couch-rs  
-build-rust:
-	@echo "Building Rust implementation..."
-	cd rust && cargo build --release
-	@echo "✅ Built: rust/target/release/mail2couch-rs"
-
-# Build optimized release versions
-build-release: build-go-release build-rust-release
-
-# Build optimized Go release
-build-go-release:
-	@echo "Building optimized Go release..."
-	cd go && go build -ldflags="-s -w" -o mail2couch-go .
-	@echo "✅ Built optimized: go/mail2couch-go"
-
-# Build optimized Rust release (already built with --release above)
-build-rust-release: build-rust
-
-# Install binaries to /usr/local/bin (requires sudo)
-install: build-release
-	@echo "Installing binaries to /usr/local/bin..."
-	sudo cp go/mail2couch-go /usr/local/bin/
-	sudo cp rust/target/release/mail2couch-rs /usr/local/bin/
-	sudo chmod +x /usr/local/bin/mail2couch-go
-	sudo chmod +x /usr/local/bin/mail2couch-rs
-	@echo "✅ Installed mail2couch-go and mail2couch-rs"
-
-# Run tests for both implementations
-test: test-go test-rust
-
-# Test Go implementation
-test-go:
-	@echo "Running Go tests..."
-	cd go && go test ./...
-
-# Test Rust implementation  
-test-rust:
-	@echo "Running Rust tests..."
-	cd rust && cargo test
-
-# Clean build artifacts
-clean:
-	@echo "Cleaning build artifacts..."
-	cd go && rm -f mail2couch-go mail2couch
-	cd rust && cargo clean
-	@echo "✅ Cleaned build artifacts"
-
-# Check code formatting and linting
-check: check-go check-rust
-
-# Check Go code
-check-go:
-	@echo "Checking Go code..."
-	cd go && go fmt ./...
-	cd go && go vet ./...
-
-# Check Rust code
-check-rust:
-	@echo "Checking Rust code..."
-	cd rust && cargo fmt --check
-	cd rust && cargo clippy -- -D warnings
-
-# Fix code formatting
-fmt: fmt-go fmt-rust
-
-# Format Go code
-fmt-go:
-	@echo "Formatting Go code..."
-	cd go && go fmt ./...
-
-# Format Rust code
-fmt-rust:
-	@echo "Formatting Rust code..."
-	cd rust && cargo fmt
-
-# Show help
-help:
-	@echo "Available targets:"
-	@echo "  all           - Build both implementations (default)"
-	@echo "  build         - Build both implementations"
-	@echo "  build-go      - Build Go implementation (mail2couch-go)"
-	@echo "  build-rust    - Build Rust implementation (mail2couch-rs)"
-	@echo "  build-release - Build optimized release versions"
-	@echo "  install       - Install binaries to /usr/local/bin (requires sudo)"
-	@echo "  test          - Run tests for both implementations"
-	@echo "  test-go       - Run Go tests"
-	@echo "  test-rust     - Run Rust tests"
-	@echo "  clean         - Clean build artifacts"
-	@echo "  check         - Check code formatting and linting"
-	@echo "  fmt           - Format code"
-	@echo "  help          - Show this help message"
-	@echo ""
-	@echo "Output binaries:"
-	@echo "  go/mail2couch-go                    - Go implementation"
-	@echo "  rust/target/release/mail2couch-rs   - Rust implementation"
-
-# Development convenience targets
-dev-go: build-go
-	./go/mail2couch-go --help
-
-dev-rust: build-rust
-	./rust/target/release/mail2couch-rs --help

justfile

@@ -135,4 +135,95 @@ versions: build
     @./rust/target/release/mail2couch-rs --version
 
 # Clean and rebuild everything
-rebuild: clean build
+rebuild: clean build
+
+# Systemd service management
+
+# Install systemd user service files
+install-services:
+    @echo "Installing systemd user service files..."
+    mkdir -p ~/.config/systemd/user
+    cp systemd/*.service ~/.config/systemd/user/
+    cp systemd/*.timer ~/.config/systemd/user/
+    systemctl --user daemon-reload
+    @echo "✅ Installed systemd user services and timers"
+    @echo "💡 Enable with: systemctl --user enable mail2couch-{go,rs}.service"
+    @echo "💡 Enable timers with: systemctl --user enable mail2couch-{go,rs}.timer"
+
+# Uninstall systemd user service files
+uninstall-services:
+    @echo "Uninstalling systemd user service files..."
+    systemctl --user stop mail2couch-go.service mail2couch-rs.service || true
+    systemctl --user stop mail2couch-go.timer mail2couch-rs.timer || true
+    systemctl --user stop mail2couch-go-hourly.timer mail2couch-rs-hourly.timer || true
+    systemctl --user stop mail2couch-go-daily.timer mail2couch-rs-daily.timer || true
+    systemctl --user disable mail2couch-go.service mail2couch-rs.service || true
+    systemctl --user disable mail2couch-go.timer mail2couch-rs.timer || true
+    systemctl --user disable mail2couch-go-hourly.timer mail2couch-rs-hourly.timer || true
+    systemctl --user disable mail2couch-go-daily.timer mail2couch-rs-daily.timer || true
+    rm -f ~/.config/systemd/user/mail2couch-*.service
+    rm -f ~/.config/systemd/user/mail2couch-*.timer
+    systemctl --user daemon-reload
+    @echo "✅ Uninstalled systemd user services and timers"
+
+# Show systemd service status
+service-status:
+    @echo "Service status:"
+    systemctl --user status mail2couch-go.service || true
+    systemctl --user status mail2couch-rs.service || true
+    @echo ""
+    @echo "Timer status:"
+    systemctl --user list-timers mail2couch-*
+
+# Enable Go implementation with default 30-minute timer
+enable-go:
+    systemctl --user enable mail2couch-go.service
+    systemctl --user enable mail2couch-go.timer
+    systemctl --user start mail2couch-go.timer
+    @echo "✅ Enabled Go implementation with 30-minute timer"
+
+# Enable Rust implementation with default 30-minute timer
+enable-rust:
+    systemctl --user enable mail2couch-rs.service
+    systemctl --user enable mail2couch-rs.timer
+    systemctl --user start mail2couch-rs.timer
+    @echo "✅ Enabled Rust implementation with 30-minute timer"
+
+# Enable Go implementation with hourly timer
+enable-go-hourly:
+    systemctl --user enable mail2couch-go.service
+    systemctl --user enable mail2couch-go-hourly.timer
+    systemctl --user start mail2couch-go-hourly.timer
+    @echo "✅ Enabled Go implementation with hourly timer"
+
+# Enable Rust implementation with hourly timer
+enable-rust-hourly:
+    systemctl --user enable mail2couch-rs.service
+    systemctl --user enable mail2couch-rs-hourly.timer
+    systemctl --user start mail2couch-rs-hourly.timer
+    @echo "✅ Enabled Rust implementation with hourly timer"
+
+# Enable Go implementation with daily timer
+enable-go-daily:
+    systemctl --user enable mail2couch-go.service
+    systemctl --user enable mail2couch-go-daily.timer
+    systemctl --user start mail2couch-go-daily.timer
+    @echo "✅ Enabled Go implementation with daily timer"
+
+# Enable Rust implementation with daily timer
+enable-rust-daily:
+    systemctl --user enable mail2couch-rs.service
+    systemctl --user enable mail2couch-rs-daily.timer
+    systemctl --user start mail2couch-rs-daily.timer
+    @echo "✅ Enabled Rust implementation with daily timer"
+
+# Disable all timers and services
+disable-all:
+    systemctl --user stop mail2couch-go.timer mail2couch-rs.timer || true
+    systemctl --user stop mail2couch-go-hourly.timer mail2couch-rs-hourly.timer || true
+    systemctl --user stop mail2couch-go-daily.timer mail2couch-rs-daily.timer || true
+    systemctl --user disable mail2couch-go.timer mail2couch-rs.timer || true
+    systemctl --user disable mail2couch-go-hourly.timer mail2couch-rs-hourly.timer || true
+    systemctl --user disable mail2couch-go-daily.timer mail2couch-rs-daily.timer || true
+    systemctl --user disable mail2couch-go.service mail2couch-rs.service || true
+    @echo "✅ Disabled all timers and services"

rust/src/imap.rs

@@ -578,9 +578,9 @@ impl ImapClient {
         let headers = self.extract_headers(&parsed_message);
 
         // Extract attachments and their data
-        let (has_attachments, attachment_stubs, attachment_data) = self.extract_attachments_with_data(&parsed_message);
+        let (has_attachments, _attachment_stubs, attachment_data) = self.extract_attachments_with_data(&parsed_message);
 
-        let mut mail_doc = MailDocument::new(
+        let mail_doc = MailDocument::new(
             uid.to_string(),
             mailbox.to_string(),
             from,
@@ -738,12 +738,6 @@ impl ImapClient {
         (has_attachments, attachment_stubs, attachment_data)
     }
 
-    /// Extract attachments from a parsed message (deprecated - use extract_attachments_with_data)
-    /// Returns (has_attachments, attachment_stubs)
-    fn extract_attachments(&self, message: &Message) -> (bool, HashMap<String, AttachmentStub>) {
-        let (has_attachments, attachment_stubs, _) = self.extract_attachments_with_data(message);
-        (has_attachments, attachment_stubs)
-    }
     
     /// Determine if a message part is an attachment
     fn is_attachment_part(&self, part: &mail_parser::MessagePart, content_type: &mail_parser::ContentType) -> bool {

systemd/mail2couch-go-daily.timer

@@ -0,0 +1,17 @@
+[Unit]
+Description=Run mail2couch Go Implementation daily
+Documentation=https://kode.naiv.no/olemd/mail2couch
+Requires=mail2couch-go.service
+
+[Timer]
+# Run daily at 2:30 AM with some randomization
+OnCalendar=*-*-* 02:30:00
+# Run 10 minutes after boot if we missed a scheduled run
+OnBootSec=10min
+# If the system was off, run shortly after startup
+Persistent=true
+# Add up to 30 minutes randomization to spread load
+RandomizedDelaySec=1800
+
+[Install]
+WantedBy=timers.target

systemd/mail2couch-go-hourly.timer

@@ -0,0 +1,17 @@
+[Unit]
+Description=Run mail2couch Go Implementation every hour
+Documentation=https://kode.naiv.no/olemd/mail2couch
+Requires=mail2couch-go.service
+
+[Timer]
+# Run every hour at a random minute to spread load
+OnCalendar=hourly
+# Run 5 minutes after boot if we missed a scheduled run
+OnBootSec=5min
+# If the system was off, run shortly after startup
+Persistent=true
+# Add randomization to avoid all users hitting servers simultaneously
+RandomizedDelaySec=600
+
+[Install]
+WantedBy=timers.target

systemd/mail2couch-go.service

@@ -0,0 +1,35 @@
+[Unit]
+Description=mail2couch Go Implementation - Email backup to CouchDB
+Documentation=https://kode.naiv.no/olemd/mail2couch
+After=network.target
+Wants=network.target
+
+[Service]
+Type=oneshot
+User=%i
+ExecStart=%h/bin/mail2couch-go
+WorkingDirectory=%h/.config/mail2couch
+
+# Environment
+Environment=PATH=%h/bin:/usr/local/bin:/usr/bin:/bin
+
+# Logging
+StandardOutput=journal
+StandardError=journal
+SyslogIdentifier=mail2couch-go
+
+# Security settings
+NoNewPrivileges=yes
+PrivateTmp=yes
+ProtectSystem=strict
+ProtectHome=read-only
+ReadOnlyPaths=/
+ReadWritePaths=%h/.config/mail2couch %h/.local/share/mail2couch
+
+# Resource limits
+MemoryHigh=512M
+MemoryMax=1G
+CPUQuota=50%
+
+[Install]
+WantedBy=default.target

systemd/mail2couch-go.timer

@@ -0,0 +1,17 @@
+[Unit]
+Description=Run mail2couch Go Implementation every 30 minutes
+Documentation=https://kode.naiv.no/olemd/mail2couch
+Requires=mail2couch-go.service
+
+[Timer]
+# Run every 30 minutes
+OnCalendar=*:0/30
+# Run 2 minutes after boot if we missed a scheduled run
+OnBootSec=2min
+# If the system was off, run shortly after startup
+Persistent=true
+# Add some randomization to avoid all users hitting servers simultaneously
+RandomizedDelaySec=300
+
+[Install]
+WantedBy=timers.target

systemd/mail2couch-rs-daily.timer

@@ -0,0 +1,17 @@
+[Unit]
+Description=Run mail2couch Rust Implementation daily
+Documentation=https://kode.naiv.no/olemd/mail2couch
+Requires=mail2couch-rs.service
+
+[Timer]
+# Run daily at 2:30 AM with some randomization
+OnCalendar=*-*-* 02:30:00
+# Run 10 minutes after boot if we missed a scheduled run
+OnBootSec=10min
+# If the system was off, run shortly after startup
+Persistent=true
+# Add up to 30 minutes randomization to spread load
+RandomizedDelaySec=1800
+
+[Install]
+WantedBy=timers.target

systemd/mail2couch-rs-hourly.timer

@@ -0,0 +1,17 @@
+[Unit]
+Description=Run mail2couch Rust Implementation every hour
+Documentation=https://kode.naiv.no/olemd/mail2couch
+Requires=mail2couch-rs.service
+
+[Timer]
+# Run every hour at a random minute to spread load
+OnCalendar=hourly
+# Run 5 minutes after boot if we missed a scheduled run
+OnBootSec=5min
+# If the system was off, run shortly after startup
+Persistent=true
+# Add randomization to avoid all users hitting servers simultaneously
+RandomizedDelaySec=600
+
+[Install]
+WantedBy=timers.target

systemd/mail2couch-rs.service

@@ -0,0 +1,36 @@
+[Unit]
+Description=mail2couch Rust Implementation - Email backup to CouchDB
+Documentation=https://kode.naiv.no/olemd/mail2couch
+After=network.target
+Wants=network.target
+
+[Service]
+Type=oneshot
+User=%i
+ExecStart=%h/bin/mail2couch-rs
+WorkingDirectory=%h/.config/mail2couch
+
+# Environment
+Environment=PATH=%h/bin:/usr/local/bin:/usr/bin:/bin
+Environment=RUST_LOG=info
+
+# Logging
+StandardOutput=journal
+StandardError=journal
+SyslogIdentifier=mail2couch-rs
+
+# Security settings
+NoNewPrivileges=yes
+PrivateTmp=yes
+ProtectSystem=strict
+ProtectHome=read-only
+ReadOnlyPaths=/
+ReadWritePaths=%h/.config/mail2couch %h/.local/share/mail2couch
+
+# Resource limits
+MemoryHigh=512M
+MemoryMax=1G
+CPUQuota=50%
+
+[Install]
+WantedBy=default.target

systemd/mail2couch-rs.timer

@@ -0,0 +1,17 @@
+[Unit]
+Description=Run mail2couch Rust Implementation every 30 minutes
+Documentation=https://kode.naiv.no/olemd/mail2couch
+Requires=mail2couch-rs.service
+
+[Timer]
+# Run every 30 minutes
+OnCalendar=*:0/30
+# Run 2 minutes after boot if we missed a scheduled run
+OnBootSec=2min
+# If the system was off, run shortly after startup
+Persistent=true
+# Add some randomization to avoid all users hitting servers simultaneously
+RandomizedDelaySec=300
+
+[Install]
+WantedBy=timers.target