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Rework nc detection

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This commit is contained in:
Magnus Ulimoen 2025-06-10 17:37:00 +02:00
parent 9a8f435f8e
commit 2ba5e8961d
1 changed files with 49 additions and 33 deletions
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82
netcdf-sys/build.rs
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@ -172,13 +172,18 @@ fn from_utf8_to_trimmed_string(bytes: &[u8]) -> String {
}
impl NcInfo {
fn from_path(path: &Path) -> Self {
Self {
fn from_path(path: &Path) -> Option<Self> {
let includedir = path.join("include");
if !includedir.exists() {
return None;
}
Some(Self {
version: None,
includedir: path.join("include"),
libdir: path.join("lib"),
libname: "netcdf".to_owned(),
}
})
}
fn gather_from_ncconfig(search_path: Option<&Path>) -> Option<Self> {
let path = if let Some(search_path) = search_path {
@ -229,6 +234,40 @@ fn _check_consistent_version_linked() {
todo!()
}
fn determine_ncinfo() -> NcInfo {
let nc_dir = std::env::var_os("NETCDF_DIR")
.or_else(|| std::env::var_os("NetCDF_DIR"))
.map(PathBuf::from);
if let Some(nc_dir) = nc_dir.as_ref() {
#[allow(unused_mut)]
if let Some(info) = NcInfo::gather_from_ncconfig(Some(nc_dir)) {
return info;
}
if let Some(info) = NcInfo::from_path(nc_dir) {
return info;
}
#[cfg(windows)]
{
// Conda requires Library prefix
let nc_dir = nc_dir.join("Library");
if let Some(info) = NcInfo::gather_from_ncconfig(Some(&nc_dir)) {
return info;
}
if let Some(info) = NcInfo::from_path(&nc_dir) {
return info;
}
}
}
if let Some(info) = NcInfo::gather_from_ncconfig(None) {
return info;
}
panic!("A system version of libnetcdf could not be found. Consider installing to some default location, use the environment variable NETCDF_DIR (remember to restart the shell), or prefer building the static version of libnetcdf by enabling the `static` feature on `netcdf-sys` or `netcdf`"
);
}
fn main() {
println!("cargo::rerun-if-changed=build.rs");
@ -237,42 +276,19 @@ fn main() {
let netcdf_lib = std::env::var("DEP_NETCDFSRC_LIB").unwrap();
let netcdf_path = PathBuf::from(std::env::var_os("DEP_NETCDFSRC_SEARCH").unwrap());
info = NcInfo::gather_from_ncconfig(Some(&netcdf_path.join("..")))
.unwrap_or_else(|| NcInfo::from_path(&netcdf_path.join("..")));
let mut linfo = NcInfo::gather_from_ncconfig(Some(&netcdf_path.join("..")));
if linfo.is_none() {
linfo = NcInfo::from_path(&netcdf_path.join(".."))
}
info = linfo.expect("The library path should be determined by this point");
println!("cargo::rustc-link-search=native={}", netcdf_path.display());
println!("cargo::rustc-link-lib=static={netcdf_lib}");
} else {
println!("cargo::rerun-if-env-changed=NETCDF_DIR");
let nc_dir = std::env::var_os("NETCDF_DIR")
.or_else(|| std::env::var_os("NetCDF_DIR"))
.map(PathBuf::from);
#[cfg(windows)]
let nc_dir = nc_dir.map(|d| d.join("Library"));
info = if let Some(nc_dir) = nc_dir.as_ref() {
#[allow(unused_mut)]
let mut info = NcInfo::gather_from_ncconfig(Some(nc_dir))
.unwrap_or_else(|| NcInfo::from_path(nc_dir));
#[cfg(windows)]
{
// Conda requires Library prefix
if info.is_none() {
let nc_dir = nc_dir.map(|d| d.join("Library")).unwrap();
info = NcInfo::gather_from_ncconfig(Some(nc_dir))
.unwrap_or_else(|| NcInfo::from_path(nc_dir));
}
}
info
} else {
NcInfo::gather_from_ncconfig(None).unwrap_or_else(||
panic!("A system version of libnetcdf could not be found. Consider installing to some default location, use the environment variable NETCDF_DIR (remember to restart the shell), or prefer building the static version of libnetcdf by enabling the `static` feature on `netcdf-sys` or `netcdf`")
)
};
info = determine_ncinfo();
println!("cargo::rustc-link-search={}", info.libdir.display());
println!("cargo::rustc-link-lib={}", &info.libname);