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https://github.com/TwiN/gatus.git
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fix(config): Support $$
in config for literal $
(#427)
This commit is contained in:
parent
542da61215
commit
7d6923730e
@ -7,6 +7,7 @@ import (
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"log"
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"os"
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"path/filepath"
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"strings"
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"time"
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"github.com/TwiN/deepmerge"
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@ -214,8 +215,13 @@ func walkConfigDir(path string, fn fs.WalkDirFunc) error {
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// parseAndValidateConfigBytes parses a Gatus configuration file into a Config struct and validates its parameters
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func parseAndValidateConfigBytes(yamlBytes []byte) (config *Config, err error) {
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// Replace $$ with __GATUS_LITERAL_DOLLAR_SIGN__ to prevent os.ExpandEnv from treating "$$" as if it was an
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// environment variable. This allows Gatus to support literal "$" in the configuration file.
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yamlBytes = []byte(strings.ReplaceAll(string(yamlBytes), "$$", "__GATUS_LITERAL_DOLLAR_SIGN__"))
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// Expand environment variables
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yamlBytes = []byte(os.ExpandEnv(string(yamlBytes)))
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// Replace __GATUS_LITERAL_DOLLAR_SIGN__ with "$" to restore the literal "$" in the configuration file
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yamlBytes = []byte(strings.ReplaceAll(string(yamlBytes), "__GATUS_LITERAL_DOLLAR_SIGN__", "$"))
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// Parse configuration file
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if err = yaml.Unmarshal(yamlBytes, &config); err != nil {
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return
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@ -1534,7 +1534,34 @@ endpoints:
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}
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}
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func TestParseAndValidateConfigBytesWithNoEndpointsOrAutoDiscovery(t *testing.T) {
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func TestParseAndValidateConfigBytesWithLiteralDollarSign(t *testing.T) {
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os.Setenv("GATUS_TestParseAndValidateConfigBytesWithLiteralDollarSign", "whatever")
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config, err := parseAndValidateConfigBytes([]byte(`
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endpoints:
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- name: website
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url: https://twin.sh/health
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conditions:
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- "[BODY] == $$GATUS_TestParseAndValidateConfigBytesWithLiteralDollarSign"
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- "[BODY] == $GATUS_TestParseAndValidateConfigBytesWithLiteralDollarSign"
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`))
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if err != nil {
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t.Error("expected no error, got", err.Error())
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}
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if config == nil {
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t.Fatal("Config shouldn't have been nil")
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}
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if config.Endpoints[0].URL != "https://twin.sh/health" {
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t.Errorf("URL should have been %s", "https://twin.sh/health")
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}
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if config.Endpoints[0].Conditions[0] != "[BODY] == $GATUS_TestParseAndValidateConfigBytesWithLiteralDollarSign" {
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t.Errorf("Condition should have been %s", "[BODY] == $GATUS_TestParseAndValidateConfigBytesWithLiteralDollarSign")
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}
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if config.Endpoints[0].Conditions[1] != "[BODY] == whatever" {
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t.Errorf("Condition should have been %s", "[BODY] == whatever")
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}
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}
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func TestParseAndValidateConfigBytesWithNoEndpoints(t *testing.T) {
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_, err := parseAndValidateConfigBytes([]byte(``))
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if err != ErrNoEndpointInConfig {
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t.Error("The error returned should have been of type ErrNoEndpointInConfig")
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