Add support for Packer (#4192)

* Add support for HashiCorp Packer

* Add test for packer fmt

* Add doc for HCL/Packer

* Add link to Packer doc

* Also suggest packer fix for packer ft

* Add more links to TOC

doc/ale-hcl.txt

@@ -2,6 +2,11 @@
 ALE HCL Integration                                           *ale-hcl-options*
 
 
+===============================================================================
+packer-fmt                                                 *ale-hcl-packer-fmt*
+
+See |ale-packer-fmt-fixer| for information about the available options.
+
 ===============================================================================
 terraform-fmt                                           *ale-hcl-terraform-fmt*
 

doc/ale-packer.txt

@@ -0,0 +1,24 @@
+===============================================================================
+ALE Packer Integration                                     *ale-packer-options*
+
+
+===============================================================================
+packer-fmt-fixer                                         *ale-packer-fmt-fixer*
+
+g:ale_packer_fmt_executable                       *g:ale_packer_fmt_executable*
+                                                  *b:ale_packer_fmt_executable*
+
+  Type: |String|
+  Default: `'packer'`
+
+  This variable can be changed to use a different executable for packer.
+
+
+g:ale_packer_fmt_options                             *g:ale_packer_fmt_options*
+                                                     *b:ale_packer_fmt_options*
+  Type: |String|
+  Default: `''`
+
+
+===============================================================================
+  vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:

doc/ale-supported-languages-and-tools.txt

@@ -239,6 +239,7 @@ Notes:
   * `stack-ghc`
   * `stylish-haskell`
 * HCL
+  * `packer-fmt`
   * `terraform-fmt`
 * HTML
   * `VSCode HTML language server`
@@ -392,6 +393,8 @@ Notes:
   * `ibm_validator`
   * `prettier`
   * `yamllint`
+* Packer
+  * `packer-fmt-fixer`
 * Pascal
   * `ptop`
 * Pawn

doc/ale.txt

@@ -2911,6 +2911,7 @@ documented in additional help files.
     hie...................................|ale-haskell-hie|
     ormolu................................|ale-haskell-ormolu|
   hcl.....................................|ale-hcl-options|
+    packer-fmt............................|ale-hcl-packer-fmt|
     terraform-fmt.........................|ale-hcl-terraform-fmt|
   help....................................|ale-help-options|
     cspell................................|ale-help-cspell|
@@ -3041,6 +3042,8 @@ documented in additional help files.
     ibm_validator.........................|ale-openapi-ibm-validator|
     prettier..............................|ale-openapi-prettier|
     yamllint..............................|ale-openapi-yamllint|
+  packer..................................|ale-packer-options|
+    packer-fmt-fixer......................|ale-packer-fmt-fixer|
   pascal..................................|ale-pascal-options|
     ptop..................................|ale-pascal-ptop|
   pawn....................................|ale-pawn-options|