Allow data directories outside pwd

Running ponzu-cms inside a docker container, and maintaining
data files in a volume (or several) was not possible with the
previous directory schema without copying files or binaries
to the volume.

This commit adds several environment variables to allow the
administrator to specify paths for directories while
retaining backwards compatibility.

- PONZU_DATA_DIR : is the directory where all the data and other
                   directories will be stored, still the other
                   directories can be controlled by the other env
                   variables.

- PONZU_TLS_DIR : is the directory to store devcerts and autocerts

- PONZU_ADMINSTATIC_DIR : directory where the admin static files are
                          served from.

- PONZU_UPLOAD_DIR: upload files directory

- PONZU_SEARCH_DIR: index directory for searches

3 files changed, 9 insertions, 19 deletions

diff --git a/system/tls/devcerts.go b/system/tls/devcerts.go
index 0554aa4..1dde4df 100644
--- a/system/tls/devcerts.go
+++ b/system/tls/devcerts.go
@@ -26,6 +26,8 @@ import (
 	"path/filepath"
 	"time"
 
+	"github.com/ponzu-cms/ponzu/system/cfg"
+
 	"github.com/ponzu-cms/ponzu/system/db"
 )
 
@@ -112,12 +114,8 @@ func setupDev() {
 	}
 
 	// overwrite/create directory for devcerts
-	pwd, err := os.Getwd()
-	if err != nil {
-		log.Fatalln("Couldn't find working directory to locate or save dev certificates:", err)
-	}
 
-	vendorTLSPath := filepath.Join(pwd, "cmd", "ponzu", "vendor", "github.com", "ponzu-cms", "ponzu", "system", "tls")
+	vendorTLSPath := cfg.TlsDir()
 	devcertsPath := filepath.Join(vendorTLSPath, "devcerts")
 
 	// clear all old certs if found
@@ -126,7 +124,7 @@ func setupDev() {
 		log.Fatalln("Failed to remove old files from dev certificate directory:", err)
 	}
 
-	err = os.Mkdir(devcertsPath, os.ModeDir|os.ModePerm)
+	err = os.MkdirAll(devcertsPath, os.ModeDir|os.ModePerm)
 	if err != nil {
 		log.Fatalln("Failed to create directory to locate or save dev certificates:", err)
 	}
diff --git a/system/tls/enable.go b/system/tls/enable.go
index 9fc95f9..12d63bc 100644
--- a/system/tls/enable.go
+++ b/system/tls/enable.go
@@ -13,18 +13,15 @@ import (
 	"time"
 
 	"github.com/ponzu-cms/ponzu/system/db"
+	"github.com/ponzu-cms/ponzu/system/cfg"
 	"golang.org/x/crypto/acme/autocert"
 )
 
 // newManager attempts to locate or create the cert cache directory and the
 // certs for TLS encryption and returns an autocert.Manager
 func newManager() autocert.Manager {
-	pwd, err := os.Getwd()
-	if err != nil {
-		log.Fatalln("Couldn't find working directory to locate or save certificates.")
-	}
 
-	cache := autocert.DirCache(filepath.Join(pwd, "system", "tls", "certs"))
+	cache := autocert.DirCache(filepath.Join(cfg.TlsDir(), "certs"))
 	if _, err := os.Stat(string(cache)); os.IsNotExist(err) {
 		err := os.MkdirAll(string(cache), os.ModePerm|os.ModeDir)
 		if err != nil {
diff --git a/system/tls/enabledev.go b/system/tls/enabledev.go
index 3550fc0..03bce42 100644
--- a/system/tls/enabledev.go
+++ b/system/tls/enabledev.go
@@ -3,8 +3,9 @@ package tls
 import (
 	"log"
 	"net/http"
-	"os"
 	"path/filepath"
+
+	"github.com/ponzu-cms/ponzu/system/cfg"
 )
 
 // EnableDev generates self-signed SSL certificates to use HTTPS & HTTP/2 while
@@ -15,13 +16,7 @@ import (
 func EnableDev() {
 	setupDev()
 
-	pwd, err := os.Getwd()
-	if err != nil {
-		log.Fatalln("Couldn't find working directory to activate dev certificates:", err)
-	}
-
-	vendorPath := filepath.Join(pwd, "cmd", "ponzu", "vendor", "github.com", "ponzu-cms", "ponzu", "system", "tls")
-
+	vendorPath := cfg.TlsDir()
 	cert := filepath.Join(vendorPath, "devcerts", "cert.pem")
 	key := filepath.Join(vendorPath, "devcerts", "key.pem")