use std::env; use std::path::Path; fn main() { let out_dir = env::var("OUT_DIR").unwrap(); let out_path = Path::new(&out_dir).join("bindgen.rs"); build::main(&out_dir, &out_path); } #[cfg(feature = "bundled")] mod build { extern crate cc; use std::path::Path; pub fn main(out_dir: &str, out_path: &Path) { if cfg!(feature = "sqlcipher") { panic!("Builds with bundled SQLCipher are not supported"); } #[cfg(feature = "buildtime_bindgen")] { use super::{bindings, HeaderLocation}; let header = HeaderLocation::FromPath("sqlite3/sqlite3.h".to_owned()); bindings::write_to_out_dir(header, out_path); } #[cfg(not(feature = "buildtime_bindgen"))] { use std::fs; fs::copy("sqlite3/bindgen_bundled_version.rs", out_path) .expect("Could not copy bindings to output directory"); } let mut cfg = cc::Build::new(); cfg.file("sqlite3/sqlite3.c") .flag("-DSQLITE_CORE") .flag("-DSQLITE_DEFAULT_FOREIGN_KEYS=1") .flag("-DSQLITE_ENABLE_API_ARMOR") .flag("-DSQLITE_ENABLE_COLUMN_METADATA") .flag("-DSQLITE_ENABLE_DBSTAT_VTAB") .flag("-DSQLITE_ENABLE_FTS3") .flag("-DSQLITE_ENABLE_FTS3_PARENTHESIS") .flag("-DSQLITE_ENABLE_FTS5") .flag("-DSQLITE_ENABLE_JSON1") .flag("-DSQLITE_ENABLE_LOAD_EXTENSION=1") .flag("-DSQLITE_ENABLE_MEMORY_MANAGEMENT") .flag("-DSQLITE_ENABLE_RTREE") .flag("-DSQLITE_ENABLE_STAT2") .flag("-DSQLITE_ENABLE_STAT4") .flag("-DSQLITE_HAVE_ISNAN") .flag("-DSQLITE_SOUNDEX") .flag("-DSQLITE_THREADSAFE=1") .flag("-DSQLITE_USE_URI") .flag("-DHAVE_USLEEP=1"); if cfg!(feature = "unlock_notify") { cfg.flag("-DSQLITE_ENABLE_UNLOCK_NOTIFY"); } cfg.compile("libsqlite3.a"); println!("cargo:lib_dir={}", out_dir); } } fn env_prefix() -> &'static str { if cfg!(feature = "sqlcipher") { "SQLCIPHER" } else { "SQLITE3" } } pub enum HeaderLocation { FromEnvironment, Wrapper, FromPath(String), } impl From for String { fn from(header: HeaderLocation) -> String { match header { HeaderLocation::FromEnvironment => { let prefix = env_prefix(); let mut header = env::var(format!("{}_INCLUDE_DIR", prefix)).expect(&format!( "{}_INCLUDE_DIR must be set if {}_LIB_DIR is set", prefix, prefix )); header.push_str("/sqlite3.h"); header } HeaderLocation::Wrapper => "wrapper.h".into(), HeaderLocation::FromPath(path) => path, } } } #[cfg(not(feature = "bundled"))] mod build { extern crate pkg_config; #[cfg(all(feature = "vcpkg", target_env = "msvc"))] extern crate vcpkg; use super::{bindings, env_prefix, HeaderLocation}; use std::env; use std::path::Path; pub fn main(_out_dir: &str, out_path: &Path) { let header = find_sqlite(); bindings::write_to_out_dir(header, out_path); } // Prints the necessary cargo link commands and returns the path to the header. fn find_sqlite() -> HeaderLocation { let link_lib = link_lib(); println!("cargo:rerun-if-env-changed={}_INCLUDE_DIR", env_prefix()); println!("cargo:rerun-if-env-changed={}_LIB_DIR", env_prefix()); if cfg!(target_os = "windows") { println!("cargo:rerun-if-env-changed=PATH"); } // Allow users to specify where to find SQLite. if let Ok(dir) = env::var(format!("{}_LIB_DIR", env_prefix())) { println!("cargo:rustc-link-lib={}", link_lib); println!("cargo:rustc-link-search={}", dir); return HeaderLocation::FromEnvironment; } if let Some(header) = try_vcpkg() { return header; } // See if pkg-config can do everything for us. match pkg_config::Config::new() .print_system_libs(false) .probe(link_lib) { Ok(mut lib) => { if let Some(mut header) = lib.include_paths.pop() { header.push("sqlite3.h"); HeaderLocation::FromPath(header.to_string_lossy().into()) } else { HeaderLocation::Wrapper } } Err(_) => { // No env var set and pkg-config couldn't help; just output the link-lib // request and hope that the library exists on the system paths. We used to // output /usr/lib explicitly, but that can introduce other linking problems; // see https://github.com/jgallagher/rusqlite/issues/207. println!("cargo:rustc-link-lib={}", link_lib); HeaderLocation::Wrapper } } } #[cfg(all(feature = "vcpkg", target_env = "msvc"))] fn try_vcpkg() -> Option { // See if vcpkg can find it. if let Ok(mut lib) = vcpkg::Config::new().probe(link_lib()) { if let Some(mut header) = lib.include_paths.pop() { header.push("sqlite3.h"); return Some(HeaderLocation::FromPath(header.to_string_lossy().into())); } } None } #[cfg(not(all(feature = "vcpkg", target_env = "msvc")))] fn try_vcpkg() -> Option { None } fn link_lib() -> &'static str { if cfg!(feature = "sqlcipher") { "sqlcipher" } else { "sqlite3" } } } #[cfg(all(not(feature = "buildtime_bindgen"), not(feature = "bundled")))] mod bindings { use super::HeaderLocation; use std::fs; use std::path::Path; static PREBUILT_BINDGEN_PATHS: &'static [&'static str] = &[ "bindgen-bindings/bindgen_3.6.8.rs", #[cfg(feature = "min_sqlite_version_3_6_23")] "bindgen-bindings/bindgen_3.6.23.rs", #[cfg(feature = "min_sqlite_version_3_7_7")] "bindgen-bindings/bindgen_3.7.7.rs", ]; pub fn write_to_out_dir(_header: HeaderLocation, out_path: &Path) { let in_path = PREBUILT_BINDGEN_PATHS[PREBUILT_BINDGEN_PATHS.len() - 1]; fs::copy(in_path, out_path).expect("Could not copy bindings to output directory"); } } #[cfg(feature = "buildtime_bindgen")] mod bindings { extern crate bindgen; use self::bindgen::callbacks::{IntKind, ParseCallbacks}; use super::HeaderLocation; use std::fs::OpenOptions; use std::io::Write; use std::path::Path; #[derive(Debug)] struct SqliteTypeChooser; impl ParseCallbacks for SqliteTypeChooser { fn int_macro(&self, _name: &str, value: i64) -> Option { if value >= i32::min_value() as i64 && value <= i32::max_value() as i64 { Some(IntKind::I32) } else { None } } } pub fn write_to_out_dir(header: HeaderLocation, out_path: &Path) { let header: String = header.into(); let mut output = Vec::new(); bindgen::builder() .header(header.clone()) .parse_callbacks(Box::new(SqliteTypeChooser)) .rustfmt_bindings(true) .generate() .expect(&format!("could not run bindgen on header {}", header)) .write(Box::new(&mut output)) .expect("could not write output of bindgen"); let mut output = String::from_utf8(output).expect("bindgen output was not UTF-8?!"); // rusqlite's functions feature ors in the SQLITE_DETERMINISTIC flag when it // can. This flag was added in SQLite 3.8.3, but oring it in in prior // versions of SQLite is harmless. We don't want to not build just // because this flag is missing (e.g., if we're linking against // SQLite 3.7.x), so append the flag manually if it isn't present in bindgen's // output. if !output.contains("pub const SQLITE_DETERMINISTIC") { output.push_str("\npub const SQLITE_DETERMINISTIC: i32 = 2048;\n"); } let mut file = OpenOptions::new() .write(true) .truncate(true) .create(true) .open(out_path.clone()) .expect(&format!("Could not write to {:?}", out_path)); file.write_all(output.as_bytes()) .expect(&format!("Could not write to {:?}", out_path)); } }