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annotate libpam-sys/libpam-sys-test/build.rs @ 113:178310336596

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Fix up more constants, make things i32 rather than u32.
author Paul Fisher <paul@pfish.zone>
date Sun, 29 Jun 2025 03:11:33 -0400
parents 04105e9a7de8
children 93d423b65555
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110
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1 use bindgen::MacroTypeVariation;
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2 use libpam_sys_impls::cfg_pam_impl;
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3 use quote::{format_ident, ToTokens};
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4 use std::path::PathBuf;
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5 use std::{env, fs};
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6 use syn::{Ident, Item, ItemConst, Path, Type, TypePath};
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7
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8 fn main() {
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9 generate_const_test();
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10 }
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11
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12 #[cfg_pam_impl("LinuxPam")]
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13 fn test_config() -> TestConfig {
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14 TestConfig {
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15 headers: vec![
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16 "security/_pam_types.h".into(),
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17 "security/pam_appl.h".into(),
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18 "security/pam_ext.h".into(),
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19 "security/pam_modules.h".into(),
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20 ],
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21 ignore_consts: vec!["__LINUX_PAM__".into(), "__LINUX_PAM_MINOR__".into()],
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22 }
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23 }
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24
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25 #[cfg_pam_impl("OpenPam")]
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26 fn test_config() -> TestConfig {
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27 TestConfig {
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28 headers: vec![
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29 "security/pam_types.h".into(),
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30 "security/openpam.h".into(),
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31 "security/pam_appl.h".into(),
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32 "security/pam_constants.h".into(),
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33 ],
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34 ignore_consts: vec!["OPENPAM_VERSION"],
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35 }
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36 }
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37
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38 #[cfg_pam_impl(not(any("LinuxPam", "OpenPam")))]
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39 fn test_config() -> TestConfig {
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40 panic!("This PAM implementation is not yet tested.")
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41 }
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42
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43 fn generate_const_test() {
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44 let config = test_config();
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45 let builder = bindgen::Builder::default()
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46 .header_contents("_.h", &config.header_contents())
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47 .merge_extern_blocks(true)
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48 .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
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49 .blocklist_type(".*")
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50 .blocklist_function(".*")
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51 .allowlist_var(".*")
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52 .default_macro_constant_type(MacroTypeVariation::Unsigned);
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53
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54 let generated = builder.generate().unwrap().to_string();
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55 let file = syn::parse_file(&generated).unwrap();
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56 let mut tests = vec![];
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57 tests.push("{".into());
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58 tests.extend(
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59 file.items
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60 .iter()
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61 .filter_map(|item| {
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62 if let Item::Const(item) = item {
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63 Some(item)
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64 } else {
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65 None
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66 }
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67 })
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68 .filter(|item| config.should_check_const(item))
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69 .cloned()
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70 .map(|mut item| {
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71 item.ty = Box::new(Type::Path(TypePath {
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72 qself: None,
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73 path: format_ident!("i32").into(),
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74 }));
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75 format!(
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76 "assert_eq!({tokens}, libpam_sys::{name});",
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77 tokens = item.expr.to_token_stream(),
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78 name = item.ident
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79 )
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80 }),
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81 );
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82 tests.push("}".into());
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83 fs::write(
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84 PathBuf::from(env::var("OUT_DIR").unwrap()).join("constant_test.rs"),
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85 tests.join("\n"),
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86 )
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87 .unwrap();
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88 }
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89
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90 struct TestConfig {
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91 headers: Vec<String>,
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92 ignore_consts: Vec<String>,
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93 }
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94
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95 impl TestConfig {
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96 fn header_contents(&self) -> String {
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97 let vec: Vec<_> = self
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98 .headers
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99 .iter()
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100 .map(|h| format!("#include <{h}>\n"))
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101 .collect();
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102 vec.join("")
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103 }
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104
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105 fn should_check_const(&self, item: &ItemConst) -> bool {
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106 !self.ignore_consts.contains(&item.ident.to_string())
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107 }
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108 }