drizzle_cli/commands/
export.rs

1//! Export command implementation
2//!
3//! Exports the schema as SQL statements.
4
5use std::path::PathBuf;
6
7use crate::commands::overrides;
8use crate::config::Config;
9use crate::config::Dialect;
10use crate::error::CliError;
11use crate::output;
12use crate::snapshot::parse_result_to_snapshot;
13
14#[derive(clap::Args, Debug, Clone)]
15pub struct ExportOptions {
16    /// Output SQL to a file (default: stdout)
17    #[arg(long = "sql")]
18    pub output_path: Option<PathBuf>,
19
20    /// Override dialect from config
21    #[arg(long)]
22    pub dialect: Option<Dialect>,
23
24    /// Override schema path(s)
25    #[arg(long, value_delimiter = ',')]
26    pub schema: Option<Vec<String>>,
27}
28
29/// Run the export command.
30///
31/// # Errors
32///
33/// Returns [`CliError`] if the requested database cannot be resolved, the
34/// schema files cannot be read/parsed, the resolved snapshot cannot be
35/// generated, or if writing the output SQL file fails.
36pub fn run(config: &Config, db_name: Option<&str>, opts: ExportOptions) -> Result<(), CliError> {
37    use drizzle_migrations::parser::SchemaParser;
38
39    let db = config.database(db_name)?;
40    let effective_dialect = overrides::resolve_dialect(db, opts.dialect);
41
42    crate::commands::harness::print_db_header(config, db_name);
43
44    println!("{}", output::heading("Exporting schema as SQL..."));
45    println!();
46
47    println!(
48        "  {}: {}",
49        output::label("Dialect"),
50        effective_dialect.as_str()
51    );
52
53    // Parse schema files
54    let schema_files = overrides::resolve_schema_files(db, opts.schema.as_deref())?;
55    if schema_files.is_empty() {
56        return Err(CliError::NoSchemaFiles(overrides::resolve_schema_display(
57            db,
58            opts.schema.as_deref(),
59        )));
60    }
61
62    println!(
63        "  {} {} schema file(s)",
64        output::label("Parsing"),
65        schema_files.len()
66    );
67
68    let mut combined_code = String::new();
69    for path in &schema_files {
70        let code = std::fs::read_to_string(path)
71            .map_err(|e| CliError::IoError(format!("Failed to read {}: {}", path.display(), e)))?;
72        combined_code.push_str(&code);
73        combined_code.push('\n');
74    }
75
76    let parse_result = SchemaParser::parse(&combined_code);
77
78    if parse_result.tables.is_empty() && parse_result.indexes.is_empty() {
79        println!(
80            "{}",
81            output::warning("No tables or indexes found in schema files.")
82        );
83        return Ok(());
84    }
85
86    println!(
87        "  {} {} table(s), {} index(es)",
88        output::label("Found"),
89        parse_result.tables.len(),
90        parse_result.indexes.len()
91    );
92
93    // Build snapshot from parsed schema (use config dialect)
94    let dialect = effective_dialect.to_base();
95    let snapshot = parse_result_to_snapshot(&parse_result, dialect, db.casing);
96
97    // Generate SQL from snapshot (create statements for all entities)
98    let sql_statements = generate_create_sql(&snapshot, db.breakpoints);
99
100    if sql_statements.is_empty() {
101        println!("{}", output::warning("No SQL statements generated."));
102        return Ok(());
103    }
104
105    let sql_content = sql_statements.join("\n\n");
106
107    // Output to file or stdout
108    if let Some(path) = opts.output_path {
109        std::fs::write(&path, &sql_content)
110            .map_err(|e| CliError::IoError(format!("Failed to write {}: {}", path.display(), e)))?;
111        println!();
112        println!(
113            "{}",
114            output::success(&format!(
115                "Exported {} SQL statement(s) to {}",
116                sql_statements.len(),
117                path.display()
118            ))
119        );
120    } else {
121        println!();
122        println!("{}", output::muted("-- Generated SQL --"));
123        println!();
124        println!("{sql_content}");
125        println!();
126        println!("{}", output::muted("-- End of SQL --"));
127    }
128
129    Ok(())
130}
131
132/// Generate CREATE SQL statements from a snapshot
133fn generate_create_sql(
134    snapshot: &drizzle_migrations::schema::Snapshot,
135    breakpoints: bool,
136) -> Vec<String> {
137    use drizzle_migrations::schema::Snapshot;
138
139    match snapshot {
140        Snapshot::Sqlite(snap) => {
141            use drizzle_migrations::sqlite::SQLiteSnapshot;
142            use drizzle_migrations::sqlite::diff_snapshots;
143            use drizzle_migrations::sqlite::statements::SqliteGenerator;
144
145            // Diff against empty snapshot to get all CREATE statements
146            let empty = SQLiteSnapshot::new();
147            let diff = diff_snapshots(&empty, snap);
148            let generator = SqliteGenerator::new().with_breakpoints(breakpoints);
149            generator.generate_migration(&diff)
150        }
151        Snapshot::Postgres(snap) => {
152            use drizzle_migrations::postgres::PostgresSnapshot;
153            use drizzle_migrations::postgres::diff_full_snapshots;
154            use drizzle_migrations::postgres::statements::PostgresGenerator;
155
156            // Diff against empty snapshot to get all CREATE statements
157            let empty = PostgresSnapshot::new();
158            let diff = diff_full_snapshots(&empty, snap);
159            let generator = PostgresGenerator::new().with_breakpoints(breakpoints);
160            generator.generate(&diff.diffs)
161        }
162    }
163}
drizzle_cli/commands/export.rs

drizzle_cli/commands/
export.rs
