task init: support older click v7.0 (#4681) (#4817)

* task init: support older click v7.0

`dbt init` uses click for interactively setting up a project. The
version constraints currently ask for click >= 8 but v7.0 has nearly the
same prompt/confirm/echo API. prompt added a feature that isn't used.
confirm has a behavior change if the default is None, but
confirm(..., default=None) is not used. Long story short, we can relax
the version constraint to allow installing with an older click library.

Ref: Issue #4566

* Update CHANGELOG.md

Co-authored-by: Chenyu Li <chenyulee777@gmail.com>

Co-authored-by: Chenyu Li <chenyulee777@gmail.com>

Co-authored-by: Tristan Willy <twilly@users.noreply.github.com>
Co-authored-by: Chenyu Li <chenyulee777@gmail.com>

CHANGELOG.md

@@ -4,10 +4,14 @@
 ### Fixes
 - Fix bug causing empty node level meta, snapshot config errors ([#4459](https://github.com/dbt-labs/dbt-core/issues/4459), [#4726](https://github.com/dbt-labs/dbt-core/pull/4726))
 - Fixed a bug where nodes that depend on multiple macros couldn't be selected using `-s state:modified` ([#4678](https://github.com/dbt-labs/dbt-core/issues/4678))
+- Support click versions in the v7.x series ([#4681](https://github.com/dbt-labs/dbt-core/pull/4681))
 
 ### Docs
 - Resolve errors related to operations preventing DAG from generating in the docs.  Also patch a spark issue to allow search to filter accurately past the missing columns. ([#4578](https://github.com/dbt-labs/dbt-core/issues/4578), [#4763](https://github.com/dbt-labs/dbt-core/pull/4763))
 
+Contributors:
+* [@twilly](https://github.com/twilly) ([#4681](https://github.com/dbt-labs/dbt-core/pull/4681))
+
 ## dbt-core 1.0.3 (February 21, 2022)
 
 ### Fixes

core/dbt/task/init.py

@@ -50,7 +50,8 @@
 Happy modeling!
 """
 
-# https://click.palletsprojects.com/en/8.0.x/api/?highlight=float#types
+# https://click.palletsprojects.com/en/8.0.x/api/#types
+# click v7.0 has UNPROCESSED, STRING, INT, FLOAT, BOOL, and UUID available.
 click_type_mapping = {
     "string": click.STRING,
     "int": click.INT,

core/setup.py

@@ -54,7 +54,7 @@
         'Jinja2==2.11.3',
         'MarkupSafe==2.0.1',
         'agate>=1.6,<1.6.4',
-        'click>=8,<9',
+        'click>=7.0,<9',
         'colorama>=0.3.9,<0.4.5',
         'hologram==0.0.14',
         'isodate>=0.6,<0.7',