add import and trans{_r,_w}

docs/howto/store-compressed-directories.md

@@ -3,34 +3,27 @@
 This is an example of how to use transformations (`trans_read` and `trans_write`) to store
 compressed directories and deploy them with dotdrop.
 
-Config file:
+Start by defining the transformations:
 ```yaml
 trans_read:
   uncompress: "mkdir -p {1} && tar -xf {0} -C {1}"
 trans_write:
   compress: "tar -cf {1} -C {0} ."
-config:
-  backup: true
-  create: true
-  dotpath: dotfiles
-dotfiles:
-  d_somedir:
-    dst: ~/.somedir
-    src: somedir
-    trans_read: uncompress
-    trans_write: compress
-profiles:
-  p1:
-    dotfiles:
-    - d_somedir
 ```
 
-The *read* transformation `uncompress` is used to execute the below command before deploying the dotfile (where `{0}` is the source and `{1}` the destination):
+Then import the directory by specifying which transformations to apply/associate:
+```bash
+dotdrop import --transw=compress --transr=uncompress ~/.somedir
 ```
+
+The *read* transformation `uncompress` is used to execute the below command before installing/comparing the dotfile (where `{0}` is the source and `{1}` the destination):
+```bash
 mkdir -p {1} && tar -xf {0} -C {1}
 ```
 
 And the *write* transformation `compress` is run when updating the dotfile directory by compressing it (where `{0}` is the source and `{1}` the destination):
-```
+```bash
 tar -cf {1} -C {0} .
 ```
+
+See [transformations](../config-transformations.md).