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Add ability to disable env var substitution

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This commit is contained in:
Mike Bierlee 2022-09-28 23:49:08 +03:00
parent 8389d75958
commit 84220739d8
1 changed files with 50 additions and 3 deletions
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53
source/mirage/config.d
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@ -17,6 +17,7 @@ import std.conv : to, ConvException;
import std.file : readText;
import std.path : extension;
import std.process : environment;
import std.typecons : Flag;
import mirage.json : loadJsonConfig;
@ -211,17 +212,28 @@ private class ConfigPath {
}
}
/**
* Used in a ConfigDictionary to enable to disable environment variable substitution.
*/
alias SubstituteEnvironmentVariables = Flag!"substituteEnvironmentVariables";
/**
* A ConfigDictionary contains the configuration tree and facilities to get values from that tree.
*/
class ConfigDictionary {
ConfigNode rootNode;
SubstituteEnvironmentVariables substituteEnvironmentVariables = SubstituteEnvironmentVariables
.yes;
this() {
this(SubstituteEnvironmentVariables substituteEnvironmentVariables = SubstituteEnvironmentVariables
.yes) {
this.substituteEnvironmentVariables = substituteEnvironmentVariables;
}
this(ConfigNode rootNode) {
this(ConfigNode rootNode, SubstituteEnvironmentVariables substituteEnvironmentVariables = SubstituteEnvironmentVariables
.yes) {
this.rootNode = rootNode;
this.substituteEnvironmentVariables = substituteEnvironmentVariables;
}
/**
@ -242,7 +254,7 @@ class ConfigDictionary {
auto node = getNodeAt(path);
auto value = cast(ValueNode) node;
if (value) {
return substituteEnvVars(value);
return substituteEnvironmentVariables ? substituteEnvVars(value) : value.value;
} else {
throw new ConfigReadException(
"Value expected but " ~ node.nodeType ~ " found at path: " ~ createExceptionPath(
@ -746,4 +758,39 @@ version (unittest) {
assert(config.get("megaMix") == "is ready! is set! go!");
assert(config.get("typical") == "localhost:8080");
}
@("Don't read value from environment variables when disabled")
unittest {
environment.remove("MIRAGE_CONFIG_TEST_ENV_VAR");
environment.remove("MIRAGE_CONFIG_TEST_ENV_VAR_TWO");
auto config = new ConfigDictionary(
new ObjectNode(
[
"withBrackets": new ValueNode("${MIRAGE_CONFIG_TEST_ENV_VAR}"),
"withoutBrackets": new ValueNode("$MIRAGE_CONFIG_TEST_ENV_VAR"),
"withWhiteSpace": new ValueNode(" ${MIRAGE_CONFIG_TEST_ENV_VAR} "),
"alsoWithWhiteSpace": new ValueNode(" $MIRAGE_CONFIG_TEST_ENV_VAR"),
"tooMuchWhiteSpace": new ValueNode("$MIRAGE_CONFIG_TEST_ENV_VAR "),
"notSet": new ValueNode("${MIRAGE_CONFIG_NOT_SET_TEST_ENV_VAR}"),
"withDefault": new ValueNode("$MIRAGE_CONFIG_NOT_SET_TEST_ENV_VAR:use default!"),
"withDefaultAndBrackets": new ValueNode(
"${MIRAGE_CONFIG_NOT_SET_TEST_ENV_VAR:use default!}"),
"megaMix": new ValueNode("${MIRAGE_CONFIG_TEST_ENV_VAR_TWO} ${MIRAGE_CONFIG_TEST_ENV_VAR} ${MIRAGE_CONFIG_NOT_SET_TEST_ENV_VAR:go}!"),
"typical": new ValueNode("${MIRAGE_CONFIG_TEST_HOSTNAME:localhost}:${MIRAGE_CONFIG_TEST_PORT:8080}"),
]),
SubstituteEnvironmentVariables.no
);
assert(config.get("withBrackets") == "${MIRAGE_CONFIG_TEST_ENV_VAR}");
assert(config.get("withoutBrackets") == "$MIRAGE_CONFIG_TEST_ENV_VAR");
assert(config.get("withWhiteSpace") == " ${MIRAGE_CONFIG_TEST_ENV_VAR} ");
assert(config.get("alsoWithWhiteSpace") == " $MIRAGE_CONFIG_TEST_ENV_VAR");
assert(config.get("tooMuchWhiteSpace") == "$MIRAGE_CONFIG_TEST_ENV_VAR ");
assert(config.get("notSet") == "${MIRAGE_CONFIG_NOT_SET_TEST_ENV_VAR}");
assert(config.get("withDefault") == "$MIRAGE_CONFIG_NOT_SET_TEST_ENV_VAR:use default!");
assert(config.get("withDefaultAndBrackets") == "${MIRAGE_CONFIG_NOT_SET_TEST_ENV_VAR:use default!}");
assert(config.get("megaMix") == "${MIRAGE_CONFIG_TEST_ENV_VAR_TWO} ${MIRAGE_CONFIG_TEST_ENV_VAR} ${MIRAGE_CONFIG_NOT_SET_TEST_ENV_VAR:go}!");
assert(config.get("typical") == "${MIRAGE_CONFIG_TEST_HOSTNAME:localhost}:${MIRAGE_CONFIG_TEST_PORT:8080}");
}
}