`qmk find`: usability improvements (#20440)

4 files changed, 67 insertions, 22 deletions

diff --git a/docs/cli_commands.md b/docs/cli_commands.md
index d759c9c35a..79fd9de575 100644
--- a/docs/cli_commands.md
+++ b/docs/cli_commands.md
@@ -165,16 +165,31 @@ qmk find -f 'processor=STM32F411'
 qmk find -f 'processor=STM32F411' -f 'features.rgb_matrix=true'
 ```
 
+The following filter expressions are also supported:
+
+ - `exists(key)`: Match targets where `key` is present.
+ - `absent(key)`: Match targets where `key` is not present.
+ - `contains(key, value)`: Match targets where `key` contains `value`. Can be used for strings, arrays and object keys.
+ - `length(key, value)`: Match targets where the length of `key` is `value`. Can be used for strings, arrays and objects.
+
+You can also list arbitrary values for each matched target with `--print`:
+
+```
+qmk find -f 'processor=STM32F411' -p 'keyboard_name' -p 'features.rgb_matrix'
+```
+
 **Usage**:
 
 ```
-qmk find [-h] [-km KEYMAP] [-f FILTER]
+qmk find [-h] [-km KEYMAP] [-p PRINT] [-f FILTER]
 
 options:
   -km KEYMAP, --keymap KEYMAP
                         The keymap name to build. Default is 'default'.
+  -p PRINT, --print PRINT
+                        For each matched target, print the value of the supplied info.json key. May be passed multiple times.
   -f FILTER, --filter FILTER
-                        Filter the list of keyboards based on the supplied value in rules.mk. Matches info.json structure, and accepts the formats 'features.rgblight=true' or 'exists(matrix_pins.direct)'. May be passed multiple times, all filters need to match. Value may include wildcards such as '*' and '?'.
+                        Filter the list of keyboards based on their info.json data. Accepts the formats key=value, function(key), or function(key,value), eg. 'features.rgblight=true'. Valid functions are 'absent', 'contains', 'exists' and 'length'. May be passed multiple times; all filters need to match. Value may include wildcards such as '*' and '?'.
 ```
 
 ## `qmk console`
diff --git a/lib/python/qmk/cli/find.py b/lib/python/qmk/cli/find.py
index b6f74380ab..b8340f5f33 100644
--- a/lib/python/qmk/cli/find.py
+++ b/lib/python/qmk/cli/find.py
@@ -11,13 +11,17 @@ from qmk.search import search_keymap_targets
     action='append',
     default=[],
     help=  # noqa: `format-python` and `pytest` don't agree here.
-    "Filter the list of keyboards based on the supplied value in rules.mk. Matches info.json structure, and accepts the formats 'features.rgblight=true' or 'exists(matrix_pins.direct)'. May be passed multiple times, all filters need to match. Value may include wildcards such as '*' and '?'."  # noqa: `format-python` and `pytest` don't agree here.
+    "Filter the list of keyboards based on their info.json data. Accepts the formats key=value, function(key), or function(key,value), eg. 'features.rgblight=true'. Valid functions are 'absent', 'contains', 'exists' and 'length'. May be passed multiple times; all filters need to match. Value may include wildcards such as '*' and '?'."  # noqa: `format-python` and `pytest` don't agree here.
 )
+@cli.argument('-p', '--print', arg_only=True, action='append', default=[], help="For each matched target, print the value of the supplied info.json key. May be passed multiple times.")
 @cli.argument('-km', '--keymap', type=str, default='default', help="The keymap name to build. Default is 'default'.")
 @cli.subcommand('Find builds which match supplied search criteria.')
 def find(cli):
     """Search through all keyboards and keymaps for a given search criteria.
     """
-    targets = search_keymap_targets(cli.args.keymap, cli.args.filter)
-    for target in targets:
-        print(f'{target[0]}:{target[1]}')
+    targets = search_keymap_targets(cli.args.keymap, cli.args.filter, cli.args.print)
+    for keyboard, keymap, print_vals in targets:
+        print(f'{keyboard}:{keymap}')
+
+        for key, val in print_vals:
+            print(f'    {key}={val}')
diff --git a/lib/python/qmk/makefile.py b/lib/python/qmk/makefile.py
index 02c2e70050..ae95abbf23 100644
--- a/lib/python/qmk/makefile.py
+++ b/lib/python/qmk/makefile.py
@@ -18,7 +18,7 @@ def parse_rules_mk_file(file, rules_mk=None):
 
     file = Path(file)
     if file.exists():
-        rules_mk_lines = file.read_text().split("\n")
+        rules_mk_lines = file.read_text(encoding='utf-8').split("\n")
 
         for line in rules_mk_lines:
             # Filter out comments
diff --git a/lib/python/qmk/search.py b/lib/python/qmk/search.py
index af48900e6b..8728890b27 100644
--- a/lib/python/qmk/search.py
+++ b/lib/python/qmk/search.py
@@ -45,7 +45,7 @@ def _load_keymap_info(keyboard, keymap):
         return (keyboard, keymap, keymap_json(keyboard, keymap))
 
 
-def search_keymap_targets(keymap='default', filters=[]):
+def search_keymap_targets(keymap='default', filters=[], print_vals=[]):
     targets = []
 
     with multiprocessing.Pool() as pool:
@@ -66,14 +66,43 @@ def search_keymap_targets(keymap='default', filters=[]):
             cli.log.info('Parsing data for all matching keyboard/keymap combinations...')
             valid_keymaps = [(e[0], e[1], dotty(e[2])) for e in pool.starmap(_load_keymap_info, target_list)]
 
+            function_re = re.compile(r'^(?P<function>[a-zA-Z]+)\((?P<key>[a-zA-Z0-9_\.]+)(,\s*(?P<value>[^#]+))?\)$')
             equals_re = re.compile(r'^(?P<key>[a-zA-Z0-9_\.]+)\s*=\s*(?P<value>[^#]+)$')
-            exists_re = re.compile(r'^exists\((?P<key>[a-zA-Z0-9_\.]+)\)$')
-            for filter_txt in filters:
-                f = equals_re.match(filter_txt)
-                if f is not None:
-                    key = f.group('key')
-                    value = f.group('value')
-                    cli.log.info(f'Filtering on condition ("{key}" == "{value}")...')
+
+            for filter_expr in filters:
+                function_match = function_re.match(filter_expr)
+                equals_match = equals_re.match(filter_expr)
+
+                if function_match is not None:
+                    func_name = function_match.group('function').lower()
+                    key = function_match.group('key')
+                    value = function_match.group('value')
+
+                    if value is not None:
+                        if func_name == 'length':
+                            valid_keymaps = filter(lambda e: key in e[2] and len(e[2].get(key)) == int(value), valid_keymaps)
+                        elif func_name == 'contains':
+                            valid_keymaps = filter(lambda e: key in e[2] and value in e[2].get(key), valid_keymaps)
+                        else:
+                            cli.log.warning(f'Unrecognized filter expression: {function_match.group(0)}')
+                            continue
+
+                        cli.log.info(f'Filtering on condition: {{fg_green}}{func_name}{{fg_reset}}({{fg_cyan}}{key}{{fg_reset}}, {{fg_cyan}}{value}{{fg_reset}})...')
+                    else:
+                        if func_name == 'exists':
+                            valid_keymaps = filter(lambda e: key in e[2], valid_keymaps)
+                        elif func_name == 'absent':
+                            valid_keymaps = filter(lambda e: key not in e[2], valid_keymaps)
+                        else:
+                            cli.log.warning(f'Unrecognized filter expression: {function_match.group(0)}')
+                            continue
+
+                        cli.log.info(f'Filtering on condition: {{fg_green}}{func_name}{{fg_reset}}({{fg_cyan}}{key}{{fg_reset}})...')
+
+                elif equals_match is not None:
+                    key = equals_match.group('key')
+                    value = equals_match.group('value')
+                    cli.log.info(f'Filtering on condition: {{fg_cyan}}{key}{{fg_reset}} == {{fg_cyan}}{value}{{fg_reset}}...')
 
                     def _make_filter(k, v):
                         expr = fnmatch.translate(v)
@@ -87,13 +116,10 @@ def search_keymap_targets(keymap='default', filters=[]):
                         return f
 
                     valid_keymaps = filter(_make_filter(key, value), valid_keymaps)
+                else:
+                    cli.log.warning(f'Unrecognized filter expression: {filter_expr}')
+                    continue
 
-                f = exists_re.match(filter_txt)
-                if f is not None:
-                    key = f.group('key')
-                    cli.log.info(f'Filtering on condition (exists: "{key}")...')
-                    valid_keymaps = filter(lambda e: e[2].get(key) is not None, valid_keymaps)
-
-            targets = [(e[0], e[1]) for e in valid_keymaps]
+            targets = [(e[0], e[1], [(p, e[2].get(p)) for p in print_vals]) for e in valid_keymaps]
 
     return targets