Add .spec.ignoreMissingComponents field to Kustomization API

api/v1/kustomization_types.go

@@ -177,10 +177,16 @@ type KustomizationSpec struct {
 	// +optional
 	Wait bool `json:"wait,omitempty"`
 
-	// Components specifies relative paths to specifications of other Components.
+	// Components specifies relative paths to kustomize Components.
 	// +optional
 	Components []string `json:"components,omitempty"`
 
+	// IgnoreMissingComponents instructs the controller to ignore Components paths
+	// not found in source by removing them from the generated kustomization.yaml
+	// before running kustomize build.
+	// +optional
+	IgnoreMissingComponents bool `json:"ignoreMissingComponents,omitempty"`
+
 	// HealthCheckExprs is a list of healthcheck expressions for evaluating the
 	// health of custom resources using Common Expression Language (CEL).
 	// The expressions are evaluated only when Wait or HealthChecks are specified.

config/crd/bases/kustomize.toolkit.fluxcd.io_kustomizations.yaml

@@ -71,8 +71,7 @@ spec:
                     type: object
                 type: object
               components:
-                description: Components specifies relative paths to specifications
-                  of other Components.
+                description: Components specifies relative paths to kustomize Components.
                 items:
                   type: string
                 type: array
@@ -218,6 +217,12 @@ spec:
                   - name
                   type: object
                 type: array
+              ignoreMissingComponents:
+                description: |-
+                  IgnoreMissingComponents instructs the controller to ignore Components paths
+                  not found in source by removing them from the generated kustomization.yaml
+                  before running kustomize build.
+                type: boolean
               images:
                 description: |-
                   Images is a list of (image name, new name, new tag or digest)

docs/api/v1/kustomize.md

@@ -392,7 +392,21 @@ resources. When enabled, the HealthChecks are ignored. Defaults to false.</p>
 </td>
 <td>
 <em>(Optional)</em>
-<p>Components specifies relative paths to specifications of other Components.</p>
+<p>Components specifies relative paths to kustomize Components.</p>
+</td>
+</tr>
+<tr>
+<td>
+<code>ignoreMissingComponents</code><br>
+<em>
+bool
+</em>
+</td>
+<td>
+<em>(Optional)</em>
+<p>IgnoreMissingComponents instructs the controller to ignore Components paths
+not found in source by removing them from the generated kustomization.yaml
+before running kustomize build.</p>
 </td>
 </tr>
 <tr>
@@ -1011,7 +1025,21 @@ resources. When enabled, the HealthChecks are ignored. Defaults to false.</p>
 </td>
 <td>
 <em>(Optional)</em>
-<p>Components specifies relative paths to specifications of other Components.</p>
+<p>Components specifies relative paths to kustomize Components.</p>
+</td>
+</tr>
+<tr>
+<td>
+<code>ignoreMissingComponents</code><br>
+<em>
+bool
+</em>
+</td>
+<td>
+<em>(Optional)</em>
+<p>IgnoreMissingComponents instructs the controller to ignore Components paths
+not found in source by removing them from the generated kustomization.yaml
+before running kustomize build.</p>
 </td>
 </tr>
 <tr>

docs/spec/v1/kustomizations.md

@@ -663,13 +663,19 @@ metadata:
   namespace: flux-system
 spec:
   # ...omitted for brevity
+  ignoreMissingComponents: false
   components:
   - ../ingress
   - ../tls
 ```
 
 **Note:** The components paths must be local and relative to the path specified by `.spec.path`.
 
+With `.spec.ignoreMissingComponents` you can specify whether the controller
+should ignore the component paths that are missing from the source. By default,
+it is set to `false`, meaning that the controller will fail the reconciliation
+if any of the specified paths are missing from the source.
+
 **Warning:** Components are an alpha feature in Kustomize and are therefore
 considered experimental in Flux. No guarantees are provided as the feature may
 be modified in backwards incompatible ways or removed without warning.

go.mod

@@ -23,12 +23,12 @@ require (
 	github.com/fluxcd/pkg/apis/acl v0.9.0
 	github.com/fluxcd/pkg/apis/event v0.19.0
 	github.com/fluxcd/pkg/apis/kustomize v1.12.0
-	github.com/fluxcd/pkg/apis/meta v1.20.0
-	github.com/fluxcd/pkg/auth v0.29.0
+	github.com/fluxcd/pkg/apis/meta v1.21.0
+	github.com/fluxcd/pkg/auth v0.30.0
 	github.com/fluxcd/pkg/cache v0.11.0
 	github.com/fluxcd/pkg/http/fetch v0.19.0
-	github.com/fluxcd/pkg/kustomize v1.20.0
-	github.com/fluxcd/pkg/runtime v0.82.0
+	github.com/fluxcd/pkg/kustomize v1.21.0
+	github.com/fluxcd/pkg/runtime v0.83.0
 	github.com/fluxcd/pkg/ssa v0.53.0
 	github.com/fluxcd/pkg/tar v0.14.0
 	github.com/fluxcd/pkg/testserver v0.13.0
@@ -119,7 +119,7 @@ require (
 	github.com/containerd/continuity v0.4.5 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.7 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
-	github.com/docker/cli v28.2.2+incompatible // indirect
+	github.com/docker/cli v28.3.3+incompatible // indirect
 	github.com/docker/docker v28.3.3+incompatible // indirect
 	github.com/docker/docker-credential-helpers v0.9.3 // indirect
 	github.com/docker/go-connections v0.5.0 // indirect

go.sum

@@ -157,8 +157,8 @@ github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dimchansky/utfbom v1.1.1 h1:vV6w1AhK4VMnhBno/TPVCoK9U/LP0PkLCS9tbxHdi/U=
 github.com/dimchansky/utfbom v1.1.1/go.mod h1:SxdoEBH5qIqFocHMyGOXVAybYJdr71b1Q/j0mACtrfE=
-github.com/docker/cli v28.2.2+incompatible h1:qzx5BNUDFqlvyq4AHzdNB7gSyVTmU4cgsyN9SdInc1A=
-github.com/docker/cli v28.2.2+incompatible/go.mod h1:JLrzqnKDaYBop7H2jaqPtU4hHvMKP+vjCwu2uszcLI8=
+github.com/docker/cli v28.3.3+incompatible h1:fp9ZHAr1WWPGdIWBM1b3zLtgCF+83gRdVMTJsUeiyAo=
+github.com/docker/cli v28.3.3+incompatible/go.mod h1:JLrzqnKDaYBop7H2jaqPtU4hHvMKP+vjCwu2uszcLI8=
 github.com/docker/docker v28.3.3+incompatible h1:Dypm25kh4rmk49v1eiVbsAtpAsYURjYkaKubwuBdxEI=
 github.com/docker/docker v28.3.3+incompatible/go.mod h1:eEKB0N0r5NX/I1kEveEz05bcu8tLC/8azJZsviup8Sk=
 github.com/docker/docker-credential-helpers v0.9.3 h1:gAm/VtF9wgqJMoxzT3Gj5p4AqIjCBS4wrsOh9yRqcz8=
@@ -195,20 +195,20 @@ github.com/fluxcd/pkg/apis/event v0.19.0 h1:ZJU2voontkzp5rNYA4JMOu40S4tRcrWi4Do5
 github.com/fluxcd/pkg/apis/event v0.19.0/go.mod h1:deuIyUb6lh+Z1Ccvwwxhm1wNM3kpSo+vF1IgRnpaZfQ=
 github.com/fluxcd/pkg/apis/kustomize v1.12.0 h1:KvZN6xwgP/dNSeckL4a/Uv715XqiN1C3xS+jGcPejtE=
 github.com/fluxcd/pkg/apis/kustomize v1.12.0/go.mod h1:OojLxIdKm1JAAdh3sL4j4F+vfrLKb7kq1vr8bpyEKgg=
-github.com/fluxcd/pkg/apis/meta v1.20.0 h1:l9h0kWoDZTcYV0WJkFMgDXq6Q4tSojrJ+bHpFJSsaW0=
-github.com/fluxcd/pkg/apis/meta v1.20.0/go.mod h1:XUAEUgT4gkWDAEN79E141tmL+v4SV50tVZ/Ojpc/ueg=
-github.com/fluxcd/pkg/auth v0.29.0 h1:lLc63zjodqIqg5ydlU/Kp3Qa+wvh6G2khjop5MHALvk=
-github.com/fluxcd/pkg/auth v0.29.0/go.mod h1:bjZ+6RMSGgsQQK+aPfVP8HWuBbb+FLlFxMiqd8ywzik=
+github.com/fluxcd/pkg/apis/meta v1.21.0 h1:R+bN02chcs0HUmyVDQhqe/FHmYLjipVDMLnyYfNX850=
+github.com/fluxcd/pkg/apis/meta v1.21.0/go.mod h1:XUAEUgT4gkWDAEN79E141tmL+v4SV50tVZ/Ojpc/ueg=
+github.com/fluxcd/pkg/auth v0.30.0 h1:7JMnY1ClArvOsadt6hOxceu8Q2hLsYHFMt0DV3BQl4Q=
+github.com/fluxcd/pkg/auth v0.30.0/go.mod h1:me38o1nDfSLw6YvnkT9Ce/zqJZICZSA7j5pNMR3JUbc=
 github.com/fluxcd/pkg/cache v0.11.0 h1:fsE8S+una21fSNw4MDXGUIf0Gf1J+pqa4RbsVKf2aTI=
 github.com/fluxcd/pkg/cache v0.11.0/go.mod h1:2RTIU6PsJniHmfnllQWFEo7fa5V8KQlnMgn4o0sme40=
 github.com/fluxcd/pkg/envsubst v1.5.0 h1:S07mo+MkGhptdHA4pRze5HPKlc8tHxKswNdcMZi1WDY=
 github.com/fluxcd/pkg/envsubst v1.5.0/go.mod h1:c3a8DYI855sZUubHFYQbjfjop6Wu4/zg1cLyf7SnCes=
 github.com/fluxcd/pkg/http/fetch v0.19.0 h1:dRdErv8X2t/VKnh5kFRZrlqKzbq9Gh0n/z3XArjdLho=
 github.com/fluxcd/pkg/http/fetch v0.19.0/go.mod h1:z32w8nezoBvQfMogCkhAoqKToOZzPSbIW0PeN2fKXqA=
-github.com/fluxcd/pkg/kustomize v1.20.0 h1:NU1p3PxyOz1LAsPWhmmObzP5EA+LTh9DT+6Tu9+LgCw=
-github.com/fluxcd/pkg/kustomize v1.20.0/go.mod h1:drVtmqUCJc/0a178vjl67DSePQahOBI+aO4x1kzV13M=
-github.com/fluxcd/pkg/runtime v0.82.0 h1:VdPPRJtj8/rcBdqY7GZSffoxe5elFHt+ymwQHNbPOlc=
-github.com/fluxcd/pkg/runtime v0.82.0/go.mod h1:rIDynMhU5upbn8ce3bXQhH5L6vtDw5MELycvtJG/+og=
+github.com/fluxcd/pkg/kustomize v1.21.0 h1:J+OcRTBWJcOwqhNW2oZyPHN7u54qBpScYLYnqTiM3gE=
+github.com/fluxcd/pkg/kustomize v1.21.0/go.mod h1:drVtmqUCJc/0a178vjl67DSePQahOBI+aO4x1kzV13M=
+github.com/fluxcd/pkg/runtime v0.83.0 h1:XzpwKzo7GqfBE/BKpxG5B4U7cUnojnB407S9Dpp6oLU=
+github.com/fluxcd/pkg/runtime v0.83.0/go.mod h1:r8KLvXRguKtpLAa66fA19rIbwPViXm8az038IUabYvw=
 github.com/fluxcd/pkg/sourceignore v0.14.0 h1:ZiZzbXtXb/Qp7I7JCStsxOlX8ri8rWwCvmvIrJ0UzQQ=
 github.com/fluxcd/pkg/sourceignore v0.14.0/go.mod h1:E3zKvyTyB+oQKqm/2I/jS6Rrt3B7fNuig/4bY2vi3bg=
 github.com/fluxcd/pkg/ssa v0.53.0 h1:EtKFAYWXohIGkzPhIrv8NbV5zYr4iZHY6DaNxMR9+bU=