mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2025-01-04 12:14:09 +00:00
835 lines
28 KiB
Rust
835 lines
28 KiB
Rust
//! A build dependency for Cargo libraries to find system artifacts through the
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//! `pkg-config` utility.
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//!
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//! This library will shell out to `pkg-config` as part of build scripts and
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//! probe the system to determine how to link to a specified library. The
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//! `Config` structure serves as a method of configuring how `pkg-config` is
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//! invoked in a builder style.
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//!
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//! A number of environment variables are available to globally configure how
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//! this crate will invoke `pkg-config`:
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//!
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//! * `FOO_NO_PKG_CONFIG` - if set, this will disable running `pkg-config` when
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//! probing for the library named `foo`.
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//!
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//! * `PKG_CONFIG_ALLOW_CROSS` - The `pkg-config` command usually doesn't
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//! support cross-compilation, and this crate prevents it from selecting
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//! incompatible versions of libraries.
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//! Setting `PKG_CONFIG_ALLOW_CROSS=1` disables this protection, which is
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//! likely to cause linking errors, unless `pkg-config` has been configured
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//! to use appropriate sysroot and search paths for the target platform.
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//!
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//! There are also a number of environment variables which can configure how a
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//! library is linked to (dynamically vs statically). These variables control
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//! whether the `--static` flag is passed. Note that this behavior can be
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//! overridden by configuring explicitly on `Config`. The variables are checked
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//! in the following order:
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//!
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//! * `FOO_STATIC` - pass `--static` for the library `foo`
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//! * `FOO_DYNAMIC` - do not pass `--static` for the library `foo`
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//! * `PKG_CONFIG_ALL_STATIC` - pass `--static` for all libraries
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//! * `PKG_CONFIG_ALL_DYNAMIC` - do not pass `--static` for all libraries
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//!
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//! After running `pkg-config` all appropriate Cargo metadata will be printed on
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//! stdout if the search was successful.
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//!
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//! # Example
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//!
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//! Find the system library named `foo`, with minimum version 1.2.3:
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//!
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//! ```no_run
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//! extern crate pkg_config;
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//!
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//! fn main() {
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//! pkg_config::Config::new().atleast_version("1.2.3").probe("foo").unwrap();
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//! }
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//! ```
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//!
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//! Find the system library named `foo`, with no version requirement (not
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//! recommended):
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//!
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//! ```no_run
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//! extern crate pkg_config;
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//!
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//! fn main() {
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//! pkg_config::probe_library("foo").unwrap();
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//! }
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//! ```
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//!
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//! Configure how library `foo` is linked to.
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//!
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//! ```no_run
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//! extern crate pkg_config;
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//!
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//! fn main() {
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//! pkg_config::Config::new().atleast_version("1.2.3").statik(true).probe("foo").unwrap();
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//! }
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//! ```
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#![doc(html_root_url = "https://docs.rs/pkg-config/0.3")]
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use std::collections::HashMap;
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use std::env;
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use std::error;
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use std::ffi::{OsStr, OsString};
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use std::fmt;
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use std::io;
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use std::ops::{Bound, RangeBounds};
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use std::path::PathBuf;
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use std::process::{Command, Output};
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use std::str;
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#[derive(Clone, Debug)]
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pub struct Config {
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statik: Option<bool>,
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min_version: Bound<String>,
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max_version: Bound<String>,
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extra_args: Vec<OsString>,
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cargo_metadata: bool,
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env_metadata: bool,
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print_system_libs: bool,
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print_system_cflags: bool,
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}
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#[derive(Clone, Debug)]
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pub struct Library {
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pub libs: Vec<String>,
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pub link_paths: Vec<PathBuf>,
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pub frameworks: Vec<String>,
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pub framework_paths: Vec<PathBuf>,
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pub include_paths: Vec<PathBuf>,
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pub ld_args: Vec<Vec<String>>,
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pub defines: HashMap<String, Option<String>>,
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pub version: String,
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_priv: (),
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}
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/// Represents all reasons `pkg-config` might not succeed or be run at all.
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pub enum Error {
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/// Aborted because of `*_NO_PKG_CONFIG` environment variable.
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///
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/// Contains the name of the responsible environment variable.
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EnvNoPkgConfig(String),
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/// Detected cross compilation without a custom sysroot.
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///
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/// Ignore the error with `PKG_CONFIG_ALLOW_CROSS=1`,
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/// which may let `pkg-config` select libraries
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/// for the host's architecture instead of the target's.
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CrossCompilation,
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/// Failed to run `pkg-config`.
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///
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/// Contains the command and the cause.
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Command { command: String, cause: io::Error },
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/// `pkg-config` did not exit sucessfully after probing a library.
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///
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/// Contains the command and output.
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Failure { command: String, output: Output },
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/// `pkg-config` did not exit sucessfully on the first attempt to probe a library.
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///
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/// Contains the command and output.
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ProbeFailure {
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name: String,
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command: String,
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output: Output,
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},
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#[doc(hidden)]
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// please don't match on this, we're likely to add more variants over time
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__Nonexhaustive,
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}
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impl error::Error for Error {}
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impl fmt::Debug for Error {
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fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
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// Failed `unwrap()` prints Debug representation, but the default debug format lacks helpful instructions for the end users
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<Error as fmt::Display>::fmt(self, f)
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}
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}
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impl fmt::Display for Error {
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fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
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match *self {
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Error::EnvNoPkgConfig(ref name) => write!(f, "Aborted because {} is set", name),
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Error::CrossCompilation => f.write_str(
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"pkg-config has not been configured to support cross-compilation.\n\
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\n\
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Install a sysroot for the target platform and configure it via\n\
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PKG_CONFIG_SYSROOT_DIR and PKG_CONFIG_PATH, or install a\n\
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cross-compiling wrapper for pkg-config and set it via\n\
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PKG_CONFIG environment variable.",
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),
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Error::Command {
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ref command,
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ref cause,
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} => {
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match cause.kind() {
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io::ErrorKind::NotFound => {
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let crate_name =
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std::env::var("CARGO_PKG_NAME").unwrap_or_else(|_| "sys".to_owned());
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let instructions = if cfg!(target_os = "macos") || cfg!(target_os = "ios") {
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"Try `brew install pkg-config` if you have Homebrew.\n"
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} else if cfg!(unix) {
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"Try `apt install pkg-config`, or `yum install pkg-config`,\n\
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or `pkg install pkg-config` depending on your distribution.\n"
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} else {
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"" // There's no easy fix for Windows users
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};
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write!(f, "Could not run `{command}`\n\
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The pkg-config command could not be found.\n\
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\n\
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Most likely, you need to install a pkg-config package for your OS.\n\
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{instructions}\
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\n\
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If you've already installed it, ensure the pkg-config command is one of the\n\
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directories in the PATH environment variable.\n\
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\n\
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If you did not expect this build to link to a pre-installed system library,\n\
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then check documentation of the {crate_name} crate for an option to\n\
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build the library from source, or disable features or dependencies\n\
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that require pkg-config.", command = command, instructions = instructions, crate_name = crate_name)
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}
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_ => write!(f, "Failed to run command `{}`, because: {}", command, cause),
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}
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}
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Error::ProbeFailure {
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ref name,
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ref command,
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ref output,
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} => {
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write!(
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f,
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"`{}` did not exit successfully: {}\nerror: could not find system library '{}' required by the '{}' crate\n",
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command, output.status, name, env::var("CARGO_PKG_NAME").unwrap_or_default(),
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)?;
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format_output(output, f)
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}
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Error::Failure {
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ref command,
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ref output,
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} => {
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write!(
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f,
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"`{}` did not exit successfully: {}",
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command, output.status
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)?;
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format_output(output, f)
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}
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Error::__Nonexhaustive => panic!(),
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}
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}
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}
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fn format_output(output: &Output, f: &mut fmt::Formatter) -> fmt::Result {
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let stdout = String::from_utf8_lossy(&output.stdout);
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if !stdout.is_empty() {
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write!(f, "\n--- stdout\n{}", stdout)?;
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}
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let stderr = String::from_utf8_lossy(&output.stderr);
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if !stderr.is_empty() {
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write!(f, "\n--- stderr\n{}", stderr)?;
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}
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Ok(())
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}
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/// Deprecated in favor of the probe_library function
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#[doc(hidden)]
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pub fn find_library(name: &str) -> Result<Library, String> {
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probe_library(name).map_err(|e| e.to_string())
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}
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/// Simple shortcut for using all default options for finding a library.
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pub fn probe_library(name: &str) -> Result<Library, Error> {
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Config::new().probe(name)
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}
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#[doc(hidden)]
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#[deprecated(note = "use config.target_supported() instance method instead")]
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pub fn target_supported() -> bool {
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Config::new().target_supported()
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}
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/// Run `pkg-config` to get the value of a variable from a package using
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/// `--variable`.
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///
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/// The content of `PKG_CONFIG_SYSROOT_DIR` is not injected in paths that are
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/// returned by `pkg-config --variable`, which makes them unsuitable to use
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/// during cross-compilation unless specifically designed to be used
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/// at that time.
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pub fn get_variable(package: &str, variable: &str) -> Result<String, Error> {
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let arg = format!("--variable={}", variable);
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let cfg = Config::new();
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let out = run(cfg.command(package, &[&arg]))?;
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Ok(str::from_utf8(&out).unwrap().trim_end().to_owned())
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}
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impl Config {
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/// Creates a new set of configuration options which are all initially set
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/// to "blank".
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pub fn new() -> Config {
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Config {
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statik: None,
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min_version: Bound::Unbounded,
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max_version: Bound::Unbounded,
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extra_args: vec![],
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print_system_cflags: true,
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print_system_libs: true,
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cargo_metadata: true,
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env_metadata: true,
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}
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}
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/// Indicate whether the `--static` flag should be passed.
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///
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/// This will override the inference from environment variables described in
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/// the crate documentation.
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pub fn statik(&mut self, statik: bool) -> &mut Config {
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self.statik = Some(statik);
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self
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}
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/// Indicate that the library must be at least version `vers`.
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pub fn atleast_version(&mut self, vers: &str) -> &mut Config {
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self.min_version = Bound::Included(vers.to_string());
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self.max_version = Bound::Unbounded;
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self
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}
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/// Indicate that the library must be equal to version `vers`.
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pub fn exactly_version(&mut self, vers: &str) -> &mut Config {
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self.min_version = Bound::Included(vers.to_string());
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self.max_version = Bound::Included(vers.to_string());
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self
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}
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/// Indicate that the library's version must be in `range`.
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pub fn range_version<'a, R>(&mut self, range: R) -> &mut Config
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where
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R: RangeBounds<&'a str>,
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{
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self.min_version = match range.start_bound() {
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Bound::Included(vers) => Bound::Included(vers.to_string()),
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Bound::Excluded(vers) => Bound::Excluded(vers.to_string()),
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Bound::Unbounded => Bound::Unbounded,
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};
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self.max_version = match range.end_bound() {
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Bound::Included(vers) => Bound::Included(vers.to_string()),
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Bound::Excluded(vers) => Bound::Excluded(vers.to_string()),
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Bound::Unbounded => Bound::Unbounded,
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};
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self
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}
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/// Add an argument to pass to pkg-config.
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///
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/// It's placed after all of the arguments generated by this library.
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pub fn arg<S: AsRef<OsStr>>(&mut self, arg: S) -> &mut Config {
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self.extra_args.push(arg.as_ref().to_os_string());
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self
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}
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/// Define whether metadata should be emitted for cargo allowing it to
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/// automatically link the binary. Defaults to `true`.
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pub fn cargo_metadata(&mut self, cargo_metadata: bool) -> &mut Config {
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self.cargo_metadata = cargo_metadata;
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self
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}
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/// Define whether metadata should be emitted for cargo allowing to
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/// automatically rebuild when environment variables change. Defaults to
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/// `true`.
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pub fn env_metadata(&mut self, env_metadata: bool) -> &mut Config {
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self.env_metadata = env_metadata;
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self
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}
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/// Enable or disable the `PKG_CONFIG_ALLOW_SYSTEM_LIBS` environment
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/// variable.
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///
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/// This env var is enabled by default.
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pub fn print_system_libs(&mut self, print: bool) -> &mut Config {
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self.print_system_libs = print;
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self
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}
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/// Enable or disable the `PKG_CONFIG_ALLOW_SYSTEM_CFLAGS` environment
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/// variable.
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///
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/// This env var is enabled by default.
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pub fn print_system_cflags(&mut self, print: bool) -> &mut Config {
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self.print_system_cflags = print;
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self
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}
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/// Deprecated in favor fo the `probe` function
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#[doc(hidden)]
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pub fn find(&self, name: &str) -> Result<Library, String> {
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self.probe(name).map_err(|e| e.to_string())
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}
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/// Run `pkg-config` to find the library `name`.
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///
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/// This will use all configuration previously set to specify how
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/// `pkg-config` is run.
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pub fn probe(&self, name: &str) -> Result<Library, Error> {
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let abort_var_name = format!("{}_NO_PKG_CONFIG", envify(name));
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if self.env_var_os(&abort_var_name).is_some() {
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return Err(Error::EnvNoPkgConfig(abort_var_name));
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} else if !self.target_supported() {
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return Err(Error::CrossCompilation);
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}
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let mut library = Library::new();
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let output = run(self.command(name, &["--libs", "--cflags"])).map_err(|e| match e {
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Error::Failure { command, output } => Error::ProbeFailure {
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name: name.to_owned(),
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command,
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output,
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},
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other => other,
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})?;
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library.parse_libs_cflags(name, &output, self);
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let output = run(self.command(name, &["--modversion"]))?;
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library.parse_modversion(str::from_utf8(&output).unwrap());
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Ok(library)
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}
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/// True if pkg-config is used for the host system, or configured for cross-compilation
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pub fn target_supported(&self) -> bool {
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let target = env::var_os("TARGET").unwrap_or_default();
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let host = env::var_os("HOST").unwrap_or_default();
|
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|
|
// Only use pkg-config in host == target situations by default (allowing an
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// override).
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|
if host == target {
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return true;
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}
|
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|
|
// pkg-config may not be aware of cross-compilation, and require
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// a wrapper script that sets up platform-specific prefixes.
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match self.targetted_env_var("PKG_CONFIG_ALLOW_CROSS") {
|
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// don't use pkg-config if explicitly disabled
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Some(ref val) if val == "0" => false,
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Some(_) => true,
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None => {
|
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// if not disabled, and pkg-config is customized,
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// then assume it's prepared for cross-compilation
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self.targetted_env_var("PKG_CONFIG").is_some()
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|| self.targetted_env_var("PKG_CONFIG_SYSROOT_DIR").is_some()
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}
|
|
}
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|
}
|
|
|
|
/// Deprecated in favor of the top level `get_variable` function
|
|
#[doc(hidden)]
|
|
pub fn get_variable(package: &str, variable: &str) -> Result<String, String> {
|
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get_variable(package, variable).map_err(|e| e.to_string())
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}
|
|
|
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fn targetted_env_var(&self, var_base: &str) -> Option<OsString> {
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|
match (env::var("TARGET"), env::var("HOST")) {
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(Ok(target), Ok(host)) => {
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let kind = if host == target { "HOST" } else { "TARGET" };
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|
let target_u = target.replace("-", "_");
|
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self.env_var_os(&format!("{}_{}", var_base, target))
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.or_else(|| self.env_var_os(&format!("{}_{}", var_base, target_u)))
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.or_else(|| self.env_var_os(&format!("{}_{}", kind, var_base)))
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.or_else(|| self.env_var_os(var_base))
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}
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|
(Err(env::VarError::NotPresent), _) | (_, Err(env::VarError::NotPresent)) => {
|
|
self.env_var_os(var_base)
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|
}
|
|
(Err(env::VarError::NotUnicode(s)), _) | (_, Err(env::VarError::NotUnicode(s))) => {
|
|
panic!(
|
|
"HOST or TARGET environment variable is not valid unicode: {:?}",
|
|
s
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|
)
|
|
}
|
|
}
|
|
}
|
|
|
|
fn env_var_os(&self, name: &str) -> Option<OsString> {
|
|
if self.env_metadata {
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|
println!("cargo:rerun-if-env-changed={}", name);
|
|
}
|
|
env::var_os(name)
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|
}
|
|
|
|
fn is_static(&self, name: &str) -> bool {
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|
self.statik.unwrap_or_else(|| self.infer_static(name))
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}
|
|
|
|
fn command(&self, name: &str, args: &[&str]) -> Command {
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|
let exe = self
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|
.targetted_env_var("PKG_CONFIG")
|
|
.unwrap_or_else(|| OsString::from("pkg-config"));
|
|
let mut cmd = Command::new(exe);
|
|
if self.is_static(name) {
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cmd.arg("--static");
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|
}
|
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cmd.args(args).args(&self.extra_args);
|
|
|
|
if let Some(value) = self.targetted_env_var("PKG_CONFIG_PATH") {
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|
cmd.env("PKG_CONFIG_PATH", value);
|
|
}
|
|
if let Some(value) = self.targetted_env_var("PKG_CONFIG_LIBDIR") {
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|
cmd.env("PKG_CONFIG_LIBDIR", value);
|
|
}
|
|
if let Some(value) = self.targetted_env_var("PKG_CONFIG_SYSROOT_DIR") {
|
|
cmd.env("PKG_CONFIG_SYSROOT_DIR", value);
|
|
}
|
|
if self.print_system_libs {
|
|
cmd.env("PKG_CONFIG_ALLOW_SYSTEM_LIBS", "1");
|
|
}
|
|
if self.print_system_cflags {
|
|
cmd.env("PKG_CONFIG_ALLOW_SYSTEM_CFLAGS", "1");
|
|
}
|
|
cmd.arg(name);
|
|
match self.min_version {
|
|
Bound::Included(ref version) => {
|
|
cmd.arg(&format!("{} >= {}", name, version));
|
|
}
|
|
Bound::Excluded(ref version) => {
|
|
cmd.arg(&format!("{} > {}", name, version));
|
|
}
|
|
_ => (),
|
|
}
|
|
match self.max_version {
|
|
Bound::Included(ref version) => {
|
|
cmd.arg(&format!("{} <= {}", name, version));
|
|
}
|
|
Bound::Excluded(ref version) => {
|
|
cmd.arg(&format!("{} < {}", name, version));
|
|
}
|
|
_ => (),
|
|
}
|
|
cmd
|
|
}
|
|
|
|
fn print_metadata(&self, s: &str) {
|
|
if self.cargo_metadata {
|
|
println!("cargo:{}", s);
|
|
}
|
|
}
|
|
|
|
fn infer_static(&self, name: &str) -> bool {
|
|
let name = envify(name);
|
|
if self.env_var_os(&format!("{}_STATIC", name)).is_some() {
|
|
true
|
|
} else if self.env_var_os(&format!("{}_DYNAMIC", name)).is_some() {
|
|
false
|
|
} else if self.env_var_os("PKG_CONFIG_ALL_STATIC").is_some() {
|
|
true
|
|
} else if self.env_var_os("PKG_CONFIG_ALL_DYNAMIC").is_some() {
|
|
false
|
|
} else {
|
|
false
|
|
}
|
|
}
|
|
}
|
|
|
|
// Implement Default manualy since Bound does not implement Default.
|
|
impl Default for Config {
|
|
fn default() -> Config {
|
|
Config {
|
|
statik: None,
|
|
min_version: Bound::Unbounded,
|
|
max_version: Bound::Unbounded,
|
|
extra_args: vec![],
|
|
print_system_cflags: false,
|
|
print_system_libs: false,
|
|
cargo_metadata: false,
|
|
env_metadata: false,
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Library {
|
|
fn new() -> Library {
|
|
Library {
|
|
libs: Vec::new(),
|
|
link_paths: Vec::new(),
|
|
include_paths: Vec::new(),
|
|
ld_args: Vec::new(),
|
|
frameworks: Vec::new(),
|
|
framework_paths: Vec::new(),
|
|
defines: HashMap::new(),
|
|
version: String::new(),
|
|
_priv: (),
|
|
}
|
|
}
|
|
|
|
fn parse_libs_cflags(&mut self, name: &str, output: &[u8], config: &Config) {
|
|
let mut is_msvc = false;
|
|
if let Ok(target) = env::var("TARGET") {
|
|
if target.contains("msvc") {
|
|
is_msvc = true;
|
|
}
|
|
}
|
|
|
|
let system_roots = if cfg!(target_os = "macos") {
|
|
vec![PathBuf::from("/Library"), PathBuf::from("/System")]
|
|
} else {
|
|
let sysroot = config
|
|
.env_var_os("PKG_CONFIG_SYSROOT_DIR")
|
|
.or_else(|| config.env_var_os("SYSROOT"))
|
|
.map(PathBuf::from);
|
|
|
|
if cfg!(target_os = "windows") {
|
|
if let Some(sysroot) = sysroot {
|
|
vec![sysroot]
|
|
} else {
|
|
vec![]
|
|
}
|
|
} else {
|
|
vec![sysroot.unwrap_or_else(|| PathBuf::from("/usr"))]
|
|
}
|
|
};
|
|
|
|
let mut dirs = Vec::new();
|
|
let statik = config.is_static(name);
|
|
|
|
let words = split_flags(output);
|
|
|
|
// Handle single-character arguments like `-I/usr/include`
|
|
let parts = words
|
|
.iter()
|
|
.filter(|l| l.len() > 2)
|
|
.map(|arg| (&arg[0..2], &arg[2..]));
|
|
for (flag, val) in parts {
|
|
match flag {
|
|
"-L" => {
|
|
let meta = format!("rustc-link-search=native={}", val);
|
|
config.print_metadata(&meta);
|
|
dirs.push(PathBuf::from(val));
|
|
self.link_paths.push(PathBuf::from(val));
|
|
}
|
|
"-F" => {
|
|
let meta = format!("rustc-link-search=framework={}", val);
|
|
config.print_metadata(&meta);
|
|
self.framework_paths.push(PathBuf::from(val));
|
|
}
|
|
"-I" => {
|
|
self.include_paths.push(PathBuf::from(val));
|
|
}
|
|
"-l" => {
|
|
// These are provided by the CRT with MSVC
|
|
if is_msvc && ["m", "c", "pthread"].contains(&val) {
|
|
continue;
|
|
}
|
|
|
|
if statik && is_static_available(val, &system_roots, &dirs) {
|
|
let meta = format!("rustc-link-lib=static={}", val);
|
|
config.print_metadata(&meta);
|
|
} else {
|
|
let meta = format!("rustc-link-lib={}", val);
|
|
config.print_metadata(&meta);
|
|
}
|
|
|
|
self.libs.push(val.to_string());
|
|
}
|
|
"-D" => {
|
|
let mut iter = val.split('=');
|
|
self.defines.insert(
|
|
iter.next().unwrap().to_owned(),
|
|
iter.next().map(|s| s.to_owned()),
|
|
);
|
|
}
|
|
_ => {}
|
|
}
|
|
}
|
|
|
|
// Handle multi-character arguments with space-separated value like `-framework foo`
|
|
let mut iter = words.iter().flat_map(|arg| {
|
|
if arg.starts_with("-Wl,") {
|
|
arg[4..].split(',').collect()
|
|
} else {
|
|
vec![arg.as_ref()]
|
|
}
|
|
});
|
|
while let Some(part) = iter.next() {
|
|
match part {
|
|
"-framework" => {
|
|
if let Some(lib) = iter.next() {
|
|
let meta = format!("rustc-link-lib=framework={}", lib);
|
|
config.print_metadata(&meta);
|
|
self.frameworks.push(lib.to_string());
|
|
}
|
|
}
|
|
"-isystem" | "-iquote" | "-idirafter" => {
|
|
if let Some(inc) = iter.next() {
|
|
self.include_paths.push(PathBuf::from(inc));
|
|
}
|
|
}
|
|
_ => (),
|
|
}
|
|
}
|
|
|
|
let mut linker_options = words.iter().filter(|arg| arg.starts_with("-Wl,"));
|
|
while let Some(option) = linker_options.next() {
|
|
let mut pop = false;
|
|
let mut ld_option = vec![];
|
|
for subopt in option[4..].split(',') {
|
|
if pop {
|
|
pop = false;
|
|
continue;
|
|
}
|
|
|
|
if subopt == "-framework" {
|
|
pop = true;
|
|
continue;
|
|
}
|
|
|
|
ld_option.push(subopt);
|
|
}
|
|
|
|
let meta = format!("rustc-link-arg=-Wl,{}", ld_option.join(","));
|
|
config.print_metadata(&meta);
|
|
|
|
self.ld_args
|
|
.push(ld_option.into_iter().map(String::from).collect());
|
|
}
|
|
}
|
|
|
|
fn parse_modversion(&mut self, output: &str) {
|
|
self.version.push_str(output.lines().nth(0).unwrap().trim());
|
|
}
|
|
}
|
|
|
|
fn envify(name: &str) -> String {
|
|
name.chars()
|
|
.map(|c| c.to_ascii_uppercase())
|
|
.map(|c| if c == '-' { '_' } else { c })
|
|
.collect()
|
|
}
|
|
|
|
/// System libraries should only be linked dynamically
|
|
fn is_static_available(name: &str, system_roots: &[PathBuf], dirs: &[PathBuf]) -> bool {
|
|
let libname = format!("lib{}.a", name);
|
|
|
|
dirs.iter().any(|dir| {
|
|
!system_roots.iter().any(|sys| dir.starts_with(sys)) && dir.join(&libname).exists()
|
|
})
|
|
}
|
|
|
|
fn run(mut cmd: Command) -> Result<Vec<u8>, Error> {
|
|
match cmd.output() {
|
|
Ok(output) => {
|
|
if output.status.success() {
|
|
Ok(output.stdout)
|
|
} else {
|
|
Err(Error::Failure {
|
|
command: format!("{:?}", cmd),
|
|
output,
|
|
})
|
|
}
|
|
}
|
|
Err(cause) => Err(Error::Command {
|
|
command: format!("{:?}", cmd),
|
|
cause,
|
|
}),
|
|
}
|
|
}
|
|
|
|
/// Split output produced by pkg-config --cflags and / or --libs into separate flags.
|
|
///
|
|
/// Backslash in output is used to preserve literal meaning of following byte. Different words are
|
|
/// separated by unescaped space. Other whitespace characters generally should not occur unescaped
|
|
/// at all, apart from the newline at the end of output. For compatibility with what others
|
|
/// consumers of pkg-config output would do in this scenario, they are used here for splitting as
|
|
/// well.
|
|
fn split_flags(output: &[u8]) -> Vec<String> {
|
|
let mut word = Vec::new();
|
|
let mut words = Vec::new();
|
|
let mut escaped = false;
|
|
|
|
for &b in output {
|
|
match b {
|
|
_ if escaped => {
|
|
escaped = false;
|
|
word.push(b);
|
|
}
|
|
b'\\' => escaped = true,
|
|
b'\t' | b'\n' | b'\r' | b' ' => {
|
|
if !word.is_empty() {
|
|
words.push(String::from_utf8(word).unwrap());
|
|
word = Vec::new();
|
|
}
|
|
}
|
|
_ => word.push(b),
|
|
}
|
|
}
|
|
|
|
if !word.is_empty() {
|
|
words.push(String::from_utf8(word).unwrap());
|
|
}
|
|
|
|
words
|
|
}
|
|
|
|
#[test]
|
|
#[cfg(target_os = "macos")]
|
|
fn system_library_mac_test() {
|
|
use std::path::Path;
|
|
|
|
let system_roots = vec![PathBuf::from("/Library"), PathBuf::from("/System")];
|
|
|
|
assert!(!is_static_available(
|
|
"PluginManager",
|
|
&system_roots,
|
|
&[PathBuf::from("/Library/Frameworks")]
|
|
));
|
|
assert!(!is_static_available(
|
|
"python2.7",
|
|
&system_roots,
|
|
&[PathBuf::from(
|
|
"/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/config"
|
|
)]
|
|
));
|
|
assert!(!is_static_available(
|
|
"ffi_convenience",
|
|
&system_roots,
|
|
&[PathBuf::from(
|
|
"/Library/Ruby/Gems/2.0.0/gems/ffi-1.9.10/ext/ffi_c/libffi-x86_64/.libs"
|
|
)]
|
|
));
|
|
|
|
// Homebrew is in /usr/local, and it's not a part of the OS
|
|
if Path::new("/usr/local/lib/libpng16.a").exists() {
|
|
assert!(is_static_available(
|
|
"png16",
|
|
&system_roots,
|
|
&[PathBuf::from("/usr/local/lib")]
|
|
));
|
|
|
|
let libpng = Config::new()
|
|
.range_version("1".."99")
|
|
.probe("libpng16")
|
|
.unwrap();
|
|
assert!(libpng.version.find('\n').is_none());
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
#[cfg(target_os = "linux")]
|
|
fn system_library_linux_test() {
|
|
assert!(!is_static_available(
|
|
"util",
|
|
&[PathBuf::from("/usr")],
|
|
&[PathBuf::from("/usr/lib/x86_64-linux-gnu")]
|
|
));
|
|
assert!(!is_static_available(
|
|
"dialog",
|
|
&[PathBuf::from("/usr")],
|
|
&[PathBuf::from("/usr/lib")]
|
|
));
|
|
}
|