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// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.security.tool.securityenv;
import java.io.PrintStream;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
/**
* Definition of some unix shell variants and how to export environments variable for those supported.
* The output format is inspired by ssh-agent's output.
*
* @author bjorncs
*/
enum UnixShell {
BOURNE("bourne", List.of("bash", "sh")) {
@Override
void writeOutputVariables(PrintStream out, Map<String, String> outputVariables) {
outputVariables.forEach((name, value) -> {
out.print(name);
out.print("=\"");
out.print(value); // note: value is assumed to need no escaping
out.print("\"; export ");
out.print(name);
out.println(';');
});
}
},
CSHELL("cshell", List.of("csh", "fish")) {
@Override
void writeOutputVariables(PrintStream out, Map<String, String> outputVariables) {
outputVariables.forEach((name, value) -> {
out.print("setenv ");
out.print(name);
out.print(" \"");
out.print(value); // note: value is assumed to need no escaping
out.println("\";");
});
}
};
private static final UnixShell DEFAULT = BOURNE;
private final String configName;
private final List<String> knownShellBinaries;
UnixShell(String configName, List<String> knownShellBinaries) {
this.configName = configName;
this.knownShellBinaries = knownShellBinaries;
}
abstract void writeOutputVariables(PrintStream out, Map<String, String> outputVariables);
String configName() {
return configName;
}
static UnixShell fromConfigName(String configName) {
return Arrays.stream(values())
.filter(shell -> shell.configName.equals(configName))
.findAny()
.orElseThrow(() -> new IllegalArgumentException("Unknown shell: " + configName));
}
static UnixShell detect(String shellEnvVariable) {
if (shellEnvVariable == null || shellEnvVariable.isEmpty()) return DEFAULT;
int lastSlash = shellEnvVariable.lastIndexOf('/');
String shellName = lastSlash != -1 ? shellEnvVariable.substring(lastSlash + 1) : shellEnvVariable;
return Arrays.stream(values())
.filter(shell -> shell.knownShellBinaries.contains(shellName))
.findAny()
.orElse(DEFAULT);
}
}
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