fix #26: check db file existence before trying to read from it

.woodpecker/image.yaml

@@ -6,7 +6,7 @@ variables:
 
 steps:
   dryrun:
-    image: docker.io/woodpeckerci/plugin-docker-buildx:latest
+    image: docker.io/woodpeckerci/plugin-docker-buildx:6.0.3
     settings:
       dockerfile: Dockerfile
       platforms: linux/amd64
@@ -17,7 +17,7 @@ steps:
       event: [pull_request]
 
   publish:
-    image: docker.io/woodpeckerci/plugin-docker-buildx:latest
+    image: docker.io/woodpeckerci/plugin-docker-buildx:6.0.3
     settings:
       dockerfile: Dockerfile
       platforms: linux/amd64

anydb.1

@@ -133,7 +133,7 @@
 .\" ========================================================================
 .\"
 .IX Title "ANYDB 1"
-.TH ANYDB 1 "2025-11-03" "1" "User Commands"
+.TH ANYDB 1 "2026-04-29" "1" "User Commands"
 .\" For nroff, turn off justification.  Always turn off hyphenation; it makes
 .\" way too many mistakes in technical documents.
 .if n .ad l
@@ -613,8 +613,16 @@ The following template variables can be used:
 .PD 0
 .IP "\fB.Value\fR \- string" 4
 .IX Item ".Value - string"
+.PD
+To be  able to use  the value  in a template,  you'll need to  add the
+\&\f(CW\*(C`\-s\*(C'\fR   flag   so   that   values  are   included   in   output   data
+stream. Otherwise you can only use \f(CW\*(C`.Preview\*(C'\fR.
+.IP "\fB.Preview\fR string" 4
+.IX Item ".Preview string"
+First line of entry value (if it is a string).
 .IP "\fB.Bin\fR \- []byte" 4
 .IX Item ".Bin - []byte"
+.PD 0
 .IP "\fB.Created\fR \- timestamp.Time" 4
 .IX Item ".Created - timestamp.Time"
 .PD
@@ -729,7 +737,7 @@ Some curl example calls to the \s-1API:\s0
 Post a new key:
     curl \-X \s-1PUT\s0 localhost:8787/anydb/v1/ \e
       \-H 'Content\-Type: application/json' \e
-      \-d '{\*(L"key\*(R":\*(L"foo\*(R",\*(L"val\*(R":\*(L"bar\*(R"}'
+      \-d '{\*(L"key\*(R":\*(L"foo\*(R",\*(L"data\*(R":\*(L"bar\*(R"}'
 .PP
 Retrieve the value:
 .PP
@@ -742,6 +750,12 @@ List all keys:
 .Vb 1
 \&    curl localhost:8787/anydb/v1/
 .Ve
+.PP
+Delete an entry:
+.PP
+.Vb 1
+\&    curl \-s \-X DELETE http://localhost:8787/anydb/v1/foo
+.Ve
 .SH "BUGS"
 .IX Header "BUGS"
 In order to report a bug, unexpected behavior, feature requests

anydb.pod

@@ -452,6 +452,17 @@ The following template variables can be used:
 
 =item B<.Value> - string
 
+To be  able to use  the value  in a template,  you'll need to  add the
+C<-s>   flag   so   that   values  are   included   in   output   data
+stream. Otherwise you can only use C<.Preview>.
+
+Be careful  if you  use C<-s> and  C<.Value> though: if  a value  is a
+multiline string, it may clutter your output.
+
+=item B<.Preview> string
+
+First line of entry value (if it is a string).
+
 =item B<.Bin> - []byte
 
 =item B<.Created> - timestamp.Time

app/db.go

@@ -91,6 +91,14 @@ func New(file string, bucket string, debug bool) (*DB, error) {
 	return &DB{Debug: debug, Dbfile: file, Bucket: bucket}, nil
 }
 
+func (db *DB) Exists() error {
+	if !common.FileExists(db.Dbfile) {
+		return fmt.Errorf("db file %s doesn't exist", db.Dbfile)
+	}
+
+	return nil
+}
+
 func (db *DB) Open() error {
 	slog.Debug("opening DB", "dbfile", db.Dbfile)
 

cfg/config.go

@@ -30,7 +30,7 @@ import (
 	"github.com/tlinden/yadu"
 )
 
-var Version string = "v0.3.0"
+var Version string = "v0.3.2"
 
 type BucketConfig struct {
 	Encrypt bool

cmd/anydb.go

@@ -413,6 +413,13 @@ TEMPLATES
 
     .Key - string
     .Value - string
+        To be able to use the value in a template, you'll need to add the
+        "-s" flag so that values are included in output data stream.
+        Otherwise you can only use ".Preview".
+
+    .Preview string
+        First line of entry value (if it is a string).
+
     .Bin - []byte
     .Created - timestamp.Time
         To retrieve a string representation of the timestamp, use
@@ -504,7 +511,7 @@ REST API
     Some curl example calls to the API:
 
     Post a new key: curl -X PUT localhost:8787/anydb/v1/ \ -H 'Content-Type:
-    application/json' \ -d '{"key":"foo","val":"bar"}'
+    application/json' \ -d '{"key":"foo","data":"bar"}'
 
     Retrieve the value:
 
@@ -514,6 +521,10 @@ REST API
 
         curl localhost:8787/anydb/v1/
 
+    Delete an entry:
+
+        curl -s -X DELETE http://localhost:8787/anydb/v1/foo
+
 BUGS
     In order to report a bug, unexpected behavior, feature requests or to
     submit a patch, please open an issue on github:

cmd/crud.go

@@ -107,6 +107,10 @@ func Get(conf *cfg.Config) *cobra.Command {
 				attr.Key = args[0]
 			}
 
+			if err := conf.DB.Exists(); err != nil {
+				return err
+			}
+
 			entry, err := conf.DB.Get(&attr)
 			if err != nil {
 				return err
@@ -207,6 +211,10 @@ func List(conf *cfg.Config) *cobra.Command {
 				conf.Mode = "wide"
 			}
 
+			if err := conf.DB.Exists(); err != nil {
+				return err
+			}
+
 			entries, err := conf.DB.List(&attr, conf.Fulltext)
 			if err != nil {
 				return err