From eda5a131777aee8d17d7a1a9786f95d78847a425 Mon Sep 17 00:00:00 2001
From: Victor Savkin <vic.savkin@gmail.com>
Date: Mon, 11 Jun 2018 11:42:48 -0400
Subject: [PATCH] feat(schematics): add an option to run affected:* by only
 specifying --base

---
 packages/schematics/src/command-line/nx.ts     | 12 ++++++++----
 packages/schematics/src/command-line/shared.ts | 11 +++++++++++
 2 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/packages/schematics/src/command-line/nx.ts b/packages/schematics/src/command-line/nx.ts
index d3e5734889..e8cd83d6d0 100644
--- a/packages/schematics/src/command-line/nx.ts
+++ b/packages/schematics/src/command-line/nx.ts
@@ -117,11 +117,16 @@ function withAffectedOptions(yargs: yargs.Argv): yargs.Argv {
       type: 'string',
       requiresArg: true
     })
-    .group(['base', 'head'], 'Run command using --base=[SHA1] --head=[SHA2]:')
+    .group(
+      ['base'],
+      'Run command using --base=[SHA1] (affected by the committed, uncommitted and untracked changes):'
+    )
+    .group(
+      ['base', 'head'],
+      'or using --base=[SHA1] --head=[SHA2] (affected by the committed changes):'
+    )
     .group(['files', 'uncommitted', 'untracked'], 'or using:')
-    .implies('SHA1', 'SHA2')
     .implies('head', 'base')
-    .implies('base', 'head')
     .nargs('uncommitted', 0)
     .nargs('untracked', 0)
     .nargs('all', 0)
@@ -132,7 +137,6 @@ function withAffectedOptions(yargs: yargs.Argv): yargs.Argv {
       default: []
     })
     .conflicts({
-      SHA1: ['files', 'untracked', 'uncommitted', 'base', 'head', 'all'],
       files: ['uncommitted', 'untracked', 'base', 'head', 'all'],
       untracked: ['uncommitted', 'files', 'base', 'head', 'all'],
       uncommitted: ['files', 'untracked', 'base', 'head', 'all'],
diff --git a/packages/schematics/src/command-line/shared.ts b/packages/schematics/src/command-line/shared.ts
index 4a1e051025..5b7ebc237f 100644
--- a/packages/schematics/src/command-line/shared.ts
+++ b/packages/schematics/src/command-line/shared.ts
@@ -65,6 +65,17 @@ export function parseFiles(
       files: getFilesUsingBaseAndHead(base, head),
       rest: [...unnamed, ...named]
     };
+  } else if (base) {
+    return {
+      files: Array.from(
+        new Set([
+          ...getFilesUsingBaseAndHead(base, 'HEAD'),
+          ...getUncommittedFiles(),
+          ...getUntrackedFiles()
+        ])
+      ),
+      rest: [...unnamed, ...named]
+    };
   } else if (unnamed.length >= 2) {
     return {
       files: getFilesFromShash(unnamed[0], unnamed[1]),