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Only check for and require SQLITE3_INCLUDE_DIR if we're running bindgen at buildtime.

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This commit is contained in:
John Gallagher 2017-03-03 15:16:49 -05:00
parent 06383c65cb
commit f0dfab0349
1 changed files with 32 additions and 11 deletions
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43
libsqlite3-sys/build.rs
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@ -44,22 +44,39 @@ mod build {
use std::env;
pub enum HeaderLocation {
FromEnvironment,
Wrapper,
FromPath(String),
}
impl From<HeaderLocation> for String {
fn from(header: HeaderLocation) -> String {
match header {
HeaderLocation::FromEnvironment => {
let mut header = env::var("SQLITE3_INCLUDE_DIR")
.expect("SQLITE3_INCLUDE_DIR must be set if SQLITE3_LIB_DIR is set");
header.push_str("/sqlite3.h");
header
}
HeaderLocation::Wrapper => "wrapper.h".into(),
HeaderLocation::FromPath(path) => path,
}
}
}
pub fn main() {
let header = find_sqlite();
bindings::write_to_out_dir(header);
}
// Prints the necessary cargo link commands and returns the path to the header.
fn find_sqlite() -> String {
fn find_sqlite() -> HeaderLocation {
// Allow users to specify where to find SQLite.
if let Ok(dir) = env::var("SQLITE3_LIB_DIR") {
let mut header = env::var("SQLITE3_INCLUDE_DIR")
.expect("SQLITE3_INCLUDE_DIR must be set if SQLITE3_LIB_DIR is set");
header.push_str("/sqlite3.h");
//run_bindgen(header);
println!("cargo:rustc-link-lib=sqlite3");
println!("cargo:rustc-link-search={}", dir);
return header;
return HeaderLocation::FromEnvironment;
}
// See if pkg-config can do everything for us.
@ -67,9 +84,9 @@ mod build {
Ok(mut lib) => {
if let Some(mut header) = lib.include_paths.pop() {
header.push("sqlite3.h");
header.to_string_lossy().into()
HeaderLocation::FromPath(header.to_string_lossy().into())
} else {
"wrapper.h".into()
HeaderLocation::Wrapper
}
}
Err(_) => {
@ -78,13 +95,15 @@ mod build {
// output /usr/lib explicitly, but that can introduce other linking problems; see
// https://github.com/jgallagher/rusqlite/issues/207.
println!("cargo:rustc-link-lib=sqlite3");
"wrapper.h".into()
HeaderLocation::Wrapper
}
}
}
#[cfg(not(feature = "buildtime_bindgen"))]
mod bindings {
use super::HeaderLocation;
use std::{env, fs};
use std::path::Path;
@ -105,7 +124,7 @@ mod build {
"bindgen-bindings/bindgen_3.7.4.rs",
];
pub fn write_to_out_dir(_header: String) {
pub fn write_to_out_dir(_header: HeaderLocation) {
let out_dir = env::var("OUT_DIR").unwrap();
let out_path = Path::new(&out_dir).join("bindgen.rs");
let in_path = PREBUILT_BINDGEN_PATHS[PREBUILT_BINDGEN_PATHS.len() - 1];
@ -118,6 +137,7 @@ mod build {
extern crate bindgen;
use self::bindgen::chooser::{TypeChooser, IntKind};
use super::HeaderLocation;
use std::env;
use std::io::Write;
@ -137,7 +157,8 @@ mod build {
}
}
pub fn write_to_out_dir(header: String) {
pub fn write_to_out_dir(header: HeaderLocation) {
let header: String = header.into();
let out_dir = env::var("OUT_DIR").unwrap();
let mut output = Vec::new();
bindgen::builder()