commit 46603af9869a76aec4a53765aa8e3fae255a0f5a Author: Alex Crichton Date: Fri Oct 31 22:01:35 2014 -0700 Initial commit diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..4fffb2f --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +/target +/Cargo.lock diff --git a/Cargo.toml b/Cargo.toml new file mode 100644 index 0000000..9921001 --- /dev/null +++ b/Cargo.toml @@ -0,0 +1,5 @@ +[package] + +name = "pkg-config" +version = "0.0.1" +authors = ["Alex Crichton "] diff --git a/LICENSE-APACHE b/LICENSE-APACHE new file mode 100644 index 0000000..16fe87b --- /dev/null +++ b/LICENSE-APACHE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + +TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + +1. 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IN NO EVENT +SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR +IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +DEALINGS IN THE SOFTWARE. diff --git a/README.md b/README.md new file mode 100644 index 0000000..cc8ddd3 --- /dev/null +++ b/README.md @@ -0,0 +1,21 @@ +# pkg-config-rs + +A simple library meant to be used as a build dependency with Cargo packages in +order to use the system `pkg-config` tool (if available) to determine where a +library is located. + +```rust +extern crate "pkg-config" as pkg_config; + +fn main() { + pkg_config::find_library("foo").unwrap(); +} +``` + +# License + +`pkg-config-rs` is primarily distributed under the terms of both the MIT +license and the Apache License (Version 2.0), with portions covered by various +BSD-like licenses. + +See LICENSE-APACHE, and LICENSE-MIT for details. diff --git a/src/lib.rs b/src/lib.rs new file mode 100644 index 0000000..c09fc84 --- /dev/null +++ b/src/lib.rs @@ -0,0 +1,72 @@ +use std::io::Command; +use std::os; +use std::str; + +pub struct Options { + pub statik: bool, +} + +pub fn find_library(name: &str) -> Result<(), String> { + find_library_opts(name, &default_options(name)) +} + +pub fn find_library_opts(name: &str, options: &Options) -> Result<(), String> { + if os::getenv(format!("{}_NO_PKG_CONFIG", envify(name)).as_slice()).is_some() { + return Err(format!("pkg-config requested to be aborted for {}", name)) + } + let mut cmd = Command::new("pkg-config"); + if options.statik { + cmd.arg("--static"); + } + cmd.arg("--libs") + .env("PKG_CONFIG_ALLOW_SYSTEM_LIBS", "1") + .arg(name); + let out = try!(cmd.output().map_err(|e| { + format!("failed to run `{}`: {}", cmd, e) + })); + let stdout = str::from_utf8(out.output.as_slice()).unwrap(); + let stderr = str::from_utf8(out.error.as_slice()).unwrap(); + if !out.status.success() { + let mut msg = format!("`{}` did not exit successfully: {}", cmd, + out.status); + if stdout.len() > 0 { + msg.push_str("\n--- stdout\n"); + msg.push_str(stdout); + } + if stderr.len() > 0 { + msg.push_str("\n--- stderr\n"); + msg.push_str(stderr); + } + return Err(msg) + } + + for arg in stdout.split(' ').filter(|l| !l.is_empty()) { + if arg.starts_with("-l") { + println!("cargo:rustc-args=-l {}", arg.slice_from(2)); + } else if arg.starts_with("-L") { + println!("cargo:rustc-args=-L {}", arg.slice_from(2)); + } + } + Ok(()) +} + +pub fn default_options(name: &str) -> Options { + let name = envify(name); + let statik = if os::getenv(format!("{}_STATIC", name).as_slice()).is_some() { + true + } else if os::getenv(format!("{}_DYNAMIC", name).as_slice()).is_some() { + false + } else if os::getenv("PKG_CONFIG_ALL_STATIC").is_some() { + true + } else if os::getenv("PKG_CONFIG_ALL_DYNAMIC").is_some() { + false + } else { + true + }; + Options { statik: statik } +} + +fn envify(name: &str) -> String { + name.chars().map(|c| c.to_uppercase()).map(|c| if c == '-' {'_'} else {c}) + .collect() +}