[enh] Be able to delete source file

app/src/components/globals/formItems/FileItem.vue

@@ -1,15 +1,15 @@
 <template>
   <b-button-group class="w-100">
-    <b-button @click="clearFiles" variant="danger" v-if="!required && file">
+    <b-button @click="clearFiles" variant="danger" v-if="!this.required && this.value !== null && !this.value._removed">
       <icon iname="trash" />
     </b-button>
     <b-form-file
       v-model="file"
-      ref="file-input"
+      ref="input-file"
       :id="id"
-      :required="required"
       v-on="$listeners"
-      :placeholder="placeholder_"
+      :required="required"
+      :placeholder="_placeholder"
       :accept="accept"
       @blur="$parent.$emit('touch', name)"
     />
@@ -22,8 +22,7 @@ export default {
 
   data () {
     return {
-      file: this.value,
-      placeholder_: (this.value) ? this.value.name : this.placeholder
+      file: this.value
     }
   },
 
@@ -36,12 +35,24 @@ export default {
     name: { type: String, default: null }
   },
 
+  computed: {
+    _placeholder: function () {
+        return (this.value === null) ? this.placeholder : this.value.name
+    }
+  },
 
   methods: {
     clearFiles () {
-      this.file = null
-      this.placeholder_ = this.placeholder
-      this.$refs['file-input'].reset()
+      const f = new File([''], this.placeholder)
+      f._removed = true
+      if (this.value && this.value.currentfile) {
+        this.$refs['input-file'].reset()
+        this.$emit('input', f)
+      } else {
+        this.$refs['input-file'].setFiles([f])
+        this.file = f
+        this.$emit('input', f)
+      }
     }
   }
 }

app/src/components/globals/formItems/ReadOnlyAlertItem.vue

@@ -10,7 +10,7 @@ export default {
   name: 'ReadOnlyAlertItem',
 
   data () {
-    let icons = {
+    const icons = {
       success: 'thumbs-up',
       info: 'info',
       warning: 'warning',

app/src/helpers/yunohostArguments.js

@@ -130,7 +130,8 @@ export function formatYunoHostArgument (arg) {
       props: defaultProps.concat(['accept']),
       callback: function () {
         if (value) {
-          value = new File([''], value.replace(/^.*[/]/, ''))
+          value = new File([''], value)
+          value.currentfile = true
         }
       }
     },
@@ -337,6 +338,12 @@ export async function formatFormData (
     } else if (removeNull && (value === null || value === undefined)) {
       continue
     } else if (value instanceof File) {
+      if (value.currentfile) {
+          continue
+      } else if (value._removed) {
+          output[type][key] = ''
+          continue
+      }
       promises.push(pFileReader(value, output[type], key))
     } else if (flatten && isObjectLiteral(value)) {
       flattenObjectLiteral(value, output[type])

app/src/views/app/AppConfigPanel.vue

@@ -110,6 +110,7 @@ export default {
     },
 
     applyConfig (id_) {
+      console.debug(this.forms[id_])
       formatFormData(this.forms[id_], { promise: true, removeEmpty: false, removeNull: true }).then((formatedData) => {
       console.debug(formatedData)
         const args = objectToParams(formatedData)