initial work for a central applier algo

5 files changed, 36 insertions, 20 deletions

diff --git a/README.md b/README.md
index fd29ce4..a7e2992 100644
--- a/README.md
+++ b/README.md
@@ -3,5 +3,3 @@
 <img src="assets/logo-light.svg" alt="Gonf logo" width="140">
 
 Pure-Go syntax KISS configuration management system for personal use.
-
-Mainly coded by hand, with some minor help from AI. 
diff --git a/internal/resource/dir/dir.go b/internal/resource/dir/dir.go
index 8be4395..047a591 100644
--- a/internal/resource/dir/dir.go
+++ b/internal/resource/dir/dir.go
@@ -12,6 +12,7 @@ import (
 )
 
 type Dir struct {
+	resource resource.Resource
 	path     string
 	source   string
 	user     string
@@ -192,13 +193,14 @@ func Have(path string, opts ...opt.Option) resource.Resource {
 		log.Fatalf("failed to apply directory resource %s: %v", path, err)
 	}
 
-	res := resource.Register("Directory", d.path)
+	d.resource = resource.Register("Directory", d.path,
+		resource.ApplierFunc(func() error { return d.apply() }))
 
 	if err := d.apply(); err != nil {
 		log.Fatalf("failed to apply directory resource %s: %v", path, err)
 	}
 
-	return res
+	return d.resource
 }
 
 func Absent(path string, opts ...opt.Option) resource.Resource {
diff --git a/internal/resource/file/file.go b/internal/resource/file/file.go
index 6395403..5a2453e 100644
--- a/internal/resource/file/file.go
+++ b/internal/resource/file/file.go
@@ -15,13 +15,14 @@ import (
 )
 
 type File struct {
-	path    string
-	content string
-	source  string // bare path, no "source://" prefix
-	user    string
-	group   string
-	mode    os.FileMode
-	absent  bool
+	resource resource.Resource
+	path     string
+	content  string
+	source   string // bare path, no "source://" prefix
+	user     string
+	group    string
+	mode     os.FileMode
+	absent   bool
 }
 
 // SetContent implements opt.Contented. Setting literal content clears any
@@ -223,13 +224,14 @@ func Have(path string, opts ...opt.Option) resource.Resource {
 		log.Fatalf("failed to apply file resource %s: %v", path, err)
 	}
 
-	res := resource.Register("File", f.targetPath())
+	f.resource = resource.Register("File", f.targetPath(),
+		resource.ApplierFunc(func() error { return f.apply() }))
 
 	if err := f.apply(); err != nil {
 		log.Fatalf("failed to apply file resource %s: %v", path, err)
 	}
 
-	return res
+	return f.resource
 }
 
 func Absent(path string, opts ...opt.Option) resource.Resource {
diff --git a/internal/resource/link/link.go b/internal/resource/link/link.go
index f9c6c8d..5f8e345 100644
--- a/internal/resource/link/link.go
+++ b/internal/resource/link/link.go
@@ -18,10 +18,11 @@ const (
 )
 
 type Link struct {
-	path   string
-	target string
-	kind   kind
-	absent bool
+	resource resource.Resource
+	path     string
+	target   string
+	kind     kind
+	absent   bool
 }
 
 // SetSymlink implements opt.Linkable.
@@ -87,13 +88,14 @@ func Ensure(path string, opts ...opt.Option) error {
 
 func Have(path string, opts ...opt.Option) resource.Resource {
 	l := build(path, opts...)
-	res := resource.Register(l.resourceType(), l.path)
+	l.resource = resource.Register(l.resourceType(), l.path,
+		resource.ApplierFunc(func() error { return l.apply() }))
 
 	if err := l.apply(); err != nil {
 		log.Fatalf("failed to apply link resource %s: %v", path, err)
 	}
 
-	return res
+	return l.resource
 }
 
 func Absent(path string, opts ...opt.Option) resource.Resource {
diff --git a/internal/resource/resource.go b/internal/resource/resource.go
index f7951c3..4e72485 100644
--- a/internal/resource/resource.go
+++ b/internal/resource/resource.go
@@ -5,16 +5,28 @@ import (
 	"log"
 )
 
+type Applier interface {
+	Apply() error
+}
+
+type ApplierFunc func() error
+
+func (f ApplierFunc) Apply() error {
+	return f()
+}
+
 type Resource struct {
 	Type      string
 	Name      string
+	Apply     Applier
 	dependsOn map[string]struct{}
 }
 
-func Register(type_, name string) Resource {
+func Register(type_, name string, apply Applier) Resource {
 	r := Resource{
 		Type:      type_,
 		Name:      name,
+		Apply:     apply,
 		dependsOn: make(map[string]struct{}),
 	}