76 lines
2.8 KiB
Java
76 lines
2.8 KiB
Java
// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
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//
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// SPDX-License-Identifier: Apache-2.0
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package pgp.cert_d;
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import java.io.File;
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/**
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* Provider class that is responsible for resolving the pgp.cert.d base directory of the system.
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* The result can be overwritten by setting the <pre>PGP_CERT_D</pre> environment variable.
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* If this variable is not set, the system-specific default directory will be returned.
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*
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* On Windows systems, this is <pre>%APPDATA%\pgp.cert.d</pre>.
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* On Linux systems it is either <pre>$XDG_DATA_HOME/pgp.cert.d</pre> or, if <pre>$XDG_DATA_HOME</pre> is not set,
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* it is <pre>$HOME/.local/share/pgp.cert.d</pre>
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* On Mac systems it is <pre>$HOME/Library/Application Support/pgp.cert.d</pre>.
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*/
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public class BaseDirectoryProvider {
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public static File getDefaultBaseDir() {
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// Check for environment variable
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String baseDirFromEnv = System.getenv("PGP_CERT_D");
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if (baseDirFromEnv != null) {
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return new File(baseDirFromEnv);
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}
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// return OS-specific default dir
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String osName = System.getProperty("os.name", "generic")
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.toLowerCase();
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return getDefaultBaseDirForOS(osName);
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}
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public static File getDefaultBaseDirForOS(String osName) {
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String STORE_NAME = "pgp.cert.d";
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if (osName.contains("win")) {
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// %APPDATA%\Roaming\pgp.cert.d
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String app_data = System.getenv("APPDATA");
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if (app_data == null) {
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throw new AssertionError("Cannot determine APPDATA directory.");
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}
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File roaming = new File(app_data, "Roaming");
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return new File(roaming, STORE_NAME);
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}
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if (osName.contains("nux")) {
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// $XDG_DATA_HOME/pgp.cert.d
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String xdg_data_home = System.getenv("XDG_DATA_HOME");
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if (xdg_data_home != null) {
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return new File(xdg_data_home, STORE_NAME);
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}
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String user_home = System.getProperty("user.home");
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if (user_home == null) {
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throw new AssertionError("Cannot determine user.home directory.");
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}
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// $HOME/.local/share/pgp.cert.d
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File local = new File(user_home, ".local");
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File share = new File(local, "share");
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return new File(share, STORE_NAME);
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}
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if (osName.contains("mac")) {
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String home = System.getenv("HOME");
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if (home == null) {
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throw new AssertionError("Cannot determine HOME directory.");
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}
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File library = new File(home, "Library");
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File applicationSupport = new File(library, "Application Support");
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return new File(applicationSupport, STORE_NAME);
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}
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throw new IllegalArgumentException("Unknown OS " + osName);
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}
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}
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