feat(git): add gshg and gshng aliases

Add new `gshg` and `gshng` aliases. These behave very similarly to their
non-"g" counterparts, `gsh` and `gshn`, with the following differences:
- They do not pass arguments through to the `git show` command.
- They allow passing a pattern to `__g-pick-commit` to filter the
  commits the user can choose from.

lib/constants.js

@@ -40,6 +40,7 @@ const DESC_REPLACEMENTS = {
   '::__a-builds-dir': '(<.../angular/aio/aio-builds-setup>)',
   '::__g-pick-branch --gkcu-returnOutput=1': '(interactively pick a branch)',
   '::__g-pick-commit --gkcu-returnOutput=1': '(interactively pick a commit)',
+  '::__g-pick-commit --filter-commits="$1" --gkcu-returnOutput=1': '(interactively pick a filtered commit)',
 };
 
 const DEF_CODE = AliasSpecDefault.DEF_CODE = (cmd, cfg = {}) => stripIndentation(`
@@ -259,7 +260,9 @@ const ALIASES = {
     gl1: new AliasDefault('git log --decorate --oneline $* || true'),
     gl1g: new AliasDefault('git log --decorate --oneline | grep $*'),
     gsh: new AliasDefault('git show ${*:::__g-pick-commit --gkcu-returnOutput=1}'),
+    gshg: new AliasDefault('git show ${0:::__g-pick-commit --filter-commits="$1" --gkcu-returnOutput=1}'),
     gshn: new AliasDefault('git show --name-only ${*:::__g-pick-commit --gkcu-returnOutput=1}'),
+    gshng: new AliasDefault('git show --name-only ${0:::__g-pick-commit --filter-commits="$1" --gkcu-returnOutput=1}'),
     gd: new AliasDefault('ngm-diff-wh $*'),
     gdn: new AliasDefault('ngm-diff-wh --name-only $*'),
     gdh: new AliasDefault('ngm-diff-wh HEAD $*'),

package.json

@@ -112,7 +112,9 @@
     "grs1": "./bin/git/grs1.js",
     "gs": "./bin/git/gs.js",
     "gsh": "./bin/git/gsh.js",
+    "gshg": "./bin/git/gshg.js",
     "gshn": "./bin/git/gshn.js",
+    "gshng": "./bin/git/gshng.js",
     "gst": "./bin/git/gst.js",
     "gstk": "./bin/git/gstk.js",
     "gstl": "./bin/git/gstl.js",