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| 1 | +use crate::state::{JavaVersion, MemorySettings}; |
| 2 | +use regex::{Captures, Regex}; |
| 3 | +use std::collections::BTreeMap; |
| 4 | +use std::sync::LazyLock; |
| 5 | + |
| 6 | +static ENV_VAR_PATTERN: LazyLock<Regex> = |
| 7 | + LazyLock::new(|| Regex::new(r"\$(\w+)").expect("valid env var regex")); |
| 8 | + |
| 9 | +#[derive(Debug, Clone)] |
| 10 | +pub(crate) struct HookVariables { |
| 11 | + pub instance_name: String, |
| 12 | + pub instance_id: String, |
| 13 | + pub instance_dir: String, |
| 14 | + pub java_path: String, |
| 15 | + pub java_args: String, |
| 16 | +} |
| 17 | + |
| 18 | +#[derive(Debug, Clone)] |
| 19 | +pub(crate) struct HookEnvironment { |
| 20 | + lookup_env: BTreeMap<String, String>, |
| 21 | + injected_env: BTreeMap<String, String>, |
| 22 | +} |
| 23 | + |
| 24 | +impl HookEnvironment { |
| 25 | + pub(crate) fn from_current_env( |
| 26 | + custom_env_vars: &[(String, String)], |
| 27 | + variables: HookVariables, |
| 28 | + ) -> Self { |
| 29 | + Self::new( |
| 30 | + std::env::vars_os().map(|(key, value)| { |
| 31 | + ( |
| 32 | + key.to_string_lossy().into_owned(), |
| 33 | + value.to_string_lossy().into_owned(), |
| 34 | + ) |
| 35 | + }), |
| 36 | + custom_env_vars, |
| 37 | + variables, |
| 38 | + ) |
| 39 | + } |
| 40 | + |
| 41 | + fn new( |
| 42 | + process_env: impl IntoIterator<Item = (String, String)>, |
| 43 | + custom_env_vars: &[(String, String)], |
| 44 | + variables: HookVariables, |
| 45 | + ) -> Self { |
| 46 | + let mut lookup_env = |
| 47 | + process_env.into_iter().collect::<BTreeMap<_, _>>(); |
| 48 | + let mut injected_env = BTreeMap::new(); |
| 49 | + |
| 50 | + for (key, value) in custom_env_vars { |
| 51 | + lookup_env.insert(key.clone(), value.clone()); |
| 52 | + injected_env.insert(key.clone(), value.clone()); |
| 53 | + } |
| 54 | + |
| 55 | + let hook_vars = [ |
| 56 | + ("INST_NAME", variables.instance_name), |
| 57 | + ("INST_ID", variables.instance_id), |
| 58 | + ("INST_DIR", variables.instance_dir.clone()), |
| 59 | + ("INST_MC_DIR", variables.instance_dir), |
| 60 | + ("INST_JAVA", variables.java_path), |
| 61 | + ("INST_JAVA_ARGS", variables.java_args), |
| 62 | + ]; |
| 63 | + |
| 64 | + for (key, value) in hook_vars { |
| 65 | + let key = key.to_string(); |
| 66 | + lookup_env.insert(key.clone(), value.clone()); |
| 67 | + injected_env.insert(key, value); |
| 68 | + } |
| 69 | + |
| 70 | + Self { |
| 71 | + lookup_env, |
| 72 | + injected_env, |
| 73 | + } |
| 74 | + } |
| 75 | + |
| 76 | + pub(crate) fn expand(&self, input: &str) -> String { |
| 77 | + ENV_VAR_PATTERN |
| 78 | + .replace_all(input, |captures: &Captures| { |
| 79 | + self.lookup_env |
| 80 | + .get(&captures[1]) |
| 81 | + .cloned() |
| 82 | + .unwrap_or_else(|| captures[0].to_string()) |
| 83 | + }) |
| 84 | + .into_owned() |
| 85 | + } |
| 86 | + |
| 87 | + pub(crate) fn injected_envs(&self) -> Vec<(String, String)> { |
| 88 | + self.injected_env |
| 89 | + .iter() |
| 90 | + .map(|(key, value)| (key.clone(), value.clone())) |
| 91 | + .collect() |
| 92 | + } |
| 93 | +} |
| 94 | + |
| 95 | +pub(crate) fn build_hook_java_args( |
| 96 | + java_args: &[String], |
| 97 | + memory: MemorySettings, |
| 98 | + java_version: &JavaVersion, |
| 99 | +) -> String { |
| 100 | + let mut args = vec![format!("-Xmx{}M", memory.maximum)]; |
| 101 | + |
| 102 | + args.extend(java_args.iter().filter(|arg| !arg.is_empty()).cloned()); |
| 103 | + |
| 104 | + if java_version.parsed_version >= 9 { |
| 105 | + args.push( |
| 106 | + "--add-opens=java.base/java.lang.reflect=ALL-UNNAMED".to_string(), |
| 107 | + ); |
| 108 | + } |
| 109 | + |
| 110 | + if java_version.parsed_version >= 25 { |
| 111 | + args.push( |
| 112 | + "--add-opens=jdk.internal/jdk.internal.misc=ALL-UNNAMED" |
| 113 | + .to_string(), |
| 114 | + ); |
| 115 | + } |
| 116 | + |
| 117 | + args.join(" ") |
| 118 | +} |
| 119 | + |
| 120 | +#[cfg(test)] |
| 121 | +mod tests { |
| 122 | + use super::*; |
| 123 | + |
| 124 | + fn sample_variables() -> HookVariables { |
| 125 | + HookVariables { |
| 126 | + instance_name: "Test Instance".to_string(), |
| 127 | + instance_id: "test-instance".to_string(), |
| 128 | + instance_dir: "/profiles/test-instance".to_string(), |
| 129 | + java_path: "/java/bin/java".to_string(), |
| 130 | + java_args: "-Xmx4096M".to_string(), |
| 131 | + } |
| 132 | + } |
| 133 | + |
| 134 | + #[test] |
| 135 | + fn expands_builtin_and_custom_variables() { |
| 136 | + let env = HookEnvironment::new( |
| 137 | + [("HOME".to_string(), "/home/alex".to_string())], |
| 138 | + &[("CUSTOM_VAR".to_string(), "custom".to_string())], |
| 139 | + sample_variables(), |
| 140 | + ); |
| 141 | + |
| 142 | + assert_eq!( |
| 143 | + env.expand("$HOME/$INST_ID/$CUSTOM_VAR"), |
| 144 | + "/home/alex/test-instance/custom" |
| 145 | + ); |
| 146 | + } |
| 147 | + |
| 148 | + #[test] |
| 149 | + fn leaves_unknown_variables_untouched() { |
| 150 | + let env = HookEnvironment::new([], &[], sample_variables()); |
| 151 | + |
| 152 | + assert_eq!(env.expand("$UNKNOWN/$INST_NAME"), "$UNKNOWN/Test Instance"); |
| 153 | + } |
| 154 | + |
| 155 | + #[test] |
| 156 | + fn expands_empty_variables_to_empty_strings() { |
| 157 | + let env = HookEnvironment::new( |
| 158 | + [("EMPTY_VAR".to_string(), String::new())], |
| 159 | + &[], |
| 160 | + sample_variables(), |
| 161 | + ); |
| 162 | + |
| 163 | + assert_eq!(env.expand("prefix$EMPTY_VAR-suffix"), "prefix-suffix"); |
| 164 | + } |
| 165 | +} |
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