Allow to specify path to the cache directly in the config file

4 files changed, 23 insertions, 9 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c8e97d2..4dadb85 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,9 +5,13 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Added
+- Location of the cache can now be specified in the config.yml. Rationale: Easier way of dealing with multiple configurations, as each also requires a distinct cache.
+
 ## [1.1.1] - 2021-07-24
 ### Fixed
 - Correctly log out from the imap server and do not harshly disconnect.
+
 ## [1.1.0] - 2021-06-18
 ### Fixed
 - Do not try to download already embedded images (i.e. `data:image/`).
diff --git a/config.yml.example b/config.yml.example
index 747ccc2..1f2c159 100644
--- a/config.yml.example
+++ b/config.yml.example
@@ -21,6 +21,8 @@ target:
 # target: imap://test%40example.com:passw0rd@mail.example.com:143/INBOX/Feeds
 
 ## Global Options
+# Location of the cache. Can also be overwritten on the command line.
+cache: "feed.cache"
 # Timeout in seconds for fetching feeds.
 timeout: 30
 # Maximum number of failures allowed before they are reported in normal mode.
diff --git a/main.go b/main.go
index 95eee73..d2d0a3c 100644
--- a/main.go
+++ b/main.go
@@ -15,17 +15,17 @@ import (
 // flags
 var (
 	cfgFile      string = "config.yml"
-	cacheFile    string = "feed.cache"
-	printVersion bool   = false
-	dryRun       bool   = false
-	buildCache   bool   = false
-	verbose      bool   = false
-	debug        bool   = false
+	cacheFile    string
+	printVersion bool = false
+	dryRun       bool = false
+	buildCache   bool = false
+	verbose      bool = false
+	debug        bool = false
 )
 
 func init() {
 	flag.StringVar(&cfgFile, "f", cfgFile, "configuration file")
-	flag.StringVar(&cacheFile, "c", cacheFile, "cache file")
+	flag.StringVar(&cacheFile, "c", "", "override cache file location")
 	flag.BoolVar(&printVersion, "version", printVersion, "print version and exit")
 	flag.BoolVar(&dryRun, "dry-run", dryRun, "do everything short of uploading and writing the cache")
 	flag.BoolVar(&buildCache, "build-cache", buildCache, "only (re)build the cache; useful after migration or when the cache is lost or corrupted")
@@ -87,7 +87,13 @@ func run() error {
 		return err
 	}
 
-	err = state.LoadCache(cacheFile, buildCache)
+	cacheLocation := cacheFile
+	if cacheLocation == "" {
+		cacheLocation = cfg.Cache
+	}
+	log.Debugf("Using '%s' as cache location", cacheLocation)
+
+	err = state.LoadCache(cacheLocation, buildCache)
 	if err != nil {
 		return err
 	}
@@ -136,7 +142,7 @@ func run() error {
 	}
 
 	if !dryRun {
-		if err = state.StoreCache(cacheFile); err != nil {
+		if err = state.StoreCache(cacheLocation); err != nil {
 			return err
 		}
 	}
diff --git a/pkg/config/config.go b/pkg/config/config.go
index 231ce9e..32f4a71 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -17,6 +17,7 @@ type Map map[string]interface{}
 
 // GlobalOptions are not feed specific
 type GlobalOptions struct {
+	Cache        string   `yaml:"cache"`
 	Timeout      int      `yaml:"timeout"`
 	DefaultEmail string   `yaml:"default-email"`
 	Target       Url      `yaml:"target"`
@@ -26,6 +27,7 @@ type GlobalOptions struct {
 }
 
 var DefaultGlobalOptions = GlobalOptions{
+	Cache:        "feed.cache",
 	Timeout:      30,
 	MaxFailures:  10,
 	DefaultEmail: username() + "@" + Hostname(),