ci: an empty selection must build nothing, plus selector follow-ups (#3845)

ci: an empty selection must build nothing, plus selector follow-ups

A PR whose build axis legitimately selected nothing rebuilt everything.
build.yml reads .build.families twice - as a |-joined regex, and implicitly
as "is anything selected" - but tested only -z "$FAMILY_REGEX", which an
empty list and a charset-rejected one both satisfy while meaning opposite
things. ci_set_matrix had already returned the correct all-empty matrix;
the fall-open branch discarded it. #3842 and #3840 each spent 74 cmake legs
on it. Branch on the two cases instead, rename FAM_* to FAMILY_*, and cover
the block with a test that extracts it from build.yml and executes it - it
had no test at all, which is how this shipped through two merges.

Follow-ups to the same machinery: glob.escape the repo root at five sites,
so a checkout path containing [ or * stops failing closed; drop the ci-full
label, read after the matrix was already computed and so never functional;
delete 13 mcu:MKL25ZXX / mcu:SAME5X skip tokens matching no board; carry the
rule table in the module docstring, guarded against drift; and pin six
selection behaviours a mutation pass proved untested.

Cut the selector's cost 1.8x (26.0s -> 14.6s) with 0 divergences over 260
paths, and stop scoping the membrowse upload by the PR example filter.

12 files changed, 0 insertions, 12 deletions

diff --git a/examples/device/audio_4_channel_mic/skip.txt b/examples/device/audio_4_channel_mic/skip.txt
index 3ca433c08..e5e74cd60 100644
--- a/examples/device/audio_4_channel_mic/skip.txt
+++ b/examples/device/audio_4_channel_mic/skip.txt
@@ -1,5 +1,4 @@
 mcu:SAMD11
-mcu:SAME5X
 mcu:SAMG
 family:broadcom_64bit
 family:espressif
diff --git a/examples/device/audio_4_channel_mic_freertos/skip.txt b/examples/device/audio_4_channel_mic_freertos/skip.txt
index 1fd6b4b8a..cfde51051 100644
--- a/examples/device/audio_4_channel_mic_freertos/skip.txt
+++ b/examples/device/audio_4_channel_mic_freertos/skip.txt
@@ -7,7 +7,6 @@ mcu:CXD56
 mcu:F1C100S
 mcu:GD32VF103
 mcu:MCXA15
-mcu:MKL25ZXX
 mcu:MSP430x5xx
 mcu:FT90X
 mcu:SAMD11
diff --git a/examples/device/audio_test/skip.txt b/examples/device/audio_test/skip.txt
index 42394bb11..862c91c6f 100644
--- a/examples/device/audio_test/skip.txt
+++ b/examples/device/audio_test/skip.txt
@@ -1,5 +1,4 @@
 mcu:SAMD11
-mcu:SAME5X
 mcu:SAMG
 family:espressif
 mcu:CH583
diff --git a/examples/device/audio_test_freertos/skip.txt b/examples/device/audio_test_freertos/skip.txt
index 660bacd25..3d8d43286 100644
--- a/examples/device/audio_test_freertos/skip.txt
+++ b/examples/device/audio_test_freertos/skip.txt
@@ -7,7 +7,6 @@ mcu:CXD56
 mcu:F1C100S
 mcu:GD32VF103
 mcu:MCXA15
-mcu:MKL25ZXX
 mcu:MSP430x5xx
 mcu:FT90X
 mcu:SAMD11
diff --git a/examples/device/audio_test_multi_rate/skip.txt b/examples/device/audio_test_multi_rate/skip.txt
index 42394bb11..862c91c6f 100644
--- a/examples/device/audio_test_multi_rate/skip.txt
+++ b/examples/device/audio_test_multi_rate/skip.txt
@@ -1,5 +1,4 @@
 mcu:SAMD11
-mcu:SAME5X
 mcu:SAMG
 family:espressif
 mcu:CH583
diff --git a/examples/device/cdc_msc_freertos/skip.txt b/examples/device/cdc_msc_freertos/skip.txt
index 48781de84..095e350c9 100644
--- a/examples/device/cdc_msc_freertos/skip.txt
+++ b/examples/device/cdc_msc_freertos/skip.txt
@@ -7,7 +7,6 @@ mcu:CXD56
 mcu:F1C100S
 mcu:GD32VF103
 mcu:MCXA15
-mcu:MKL25ZXX
 mcu:MSP430x5xx
 mcu:FT90X
 mcu:SAMD11
diff --git a/examples/device/cdc_uac2/skip.txt b/examples/device/cdc_uac2/skip.txt
index db1d5b80b..3159cb176 100644
--- a/examples/device/cdc_uac2/skip.txt
+++ b/examples/device/cdc_uac2/skip.txt
@@ -2,7 +2,6 @@ mcu:LPC11UXX
 mcu:LPC13XX
 mcu:NUC121
 mcu:SAMD11
-mcu:SAME5X
 mcu:SAMG
 board:stm32l052dap52
 family:espressif
diff --git a/examples/device/hid_composite_freertos/skip.txt b/examples/device/hid_composite_freertos/skip.txt
index 97d8e168b..0e8415d3b 100644
--- a/examples/device/hid_composite_freertos/skip.txt
+++ b/examples/device/hid_composite_freertos/skip.txt
@@ -7,7 +7,6 @@ mcu:CXD56
 mcu:F1C100S
 mcu:GD32VF103
 mcu:MCXA15
-mcu:MKL25ZXX
 mcu:MSP430x5xx
 mcu:FT90X
 mcu:SAMD11
diff --git a/examples/device/midi_test_freertos/skip.txt b/examples/device/midi_test_freertos/skip.txt
index 97d8e168b..0e8415d3b 100644
--- a/examples/device/midi_test_freertos/skip.txt
+++ b/examples/device/midi_test_freertos/skip.txt
@@ -7,7 +7,6 @@ mcu:CXD56
 mcu:F1C100S
 mcu:GD32VF103
 mcu:MCXA15
-mcu:MKL25ZXX
 mcu:MSP430x5xx
 mcu:FT90X
 mcu:SAMD11
diff --git a/examples/device/msc_dual_lun/skip.txt b/examples/device/msc_dual_lun/skip.txt
index a9e3a99b1..833fd072c 100644
--- a/examples/device/msc_dual_lun/skip.txt
+++ b/examples/device/msc_dual_lun/skip.txt
@@ -1,3 +1,2 @@
 mcu:SAMD11
-mcu:MKL25ZXX
 family:espressif
diff --git a/examples/device/uac2_headset/skip.txt b/examples/device/uac2_headset/skip.txt
index db1d5b80b..3159cb176 100644
--- a/examples/device/uac2_headset/skip.txt
+++ b/examples/device/uac2_headset/skip.txt
@@ -2,7 +2,6 @@ mcu:LPC11UXX
 mcu:LPC13XX
 mcu:NUC121
 mcu:SAMD11
-mcu:SAME5X
 mcu:SAMG
 board:stm32l052dap52
 family:espressif
diff --git a/examples/device/uac2_speaker_fb/skip.txt b/examples/device/uac2_speaker_fb/skip.txt
index 0c7339c65..88df3e549 100644
--- a/examples/device/uac2_speaker_fb/skip.txt
+++ b/examples/device/uac2_speaker_fb/skip.txt
@@ -2,7 +2,6 @@ mcu:LPC11UXX
 mcu:LPC13XX
 mcu:NUC121
 mcu:SAMD11
-mcu:SAME5X
 mcu:SAMG
 board:stm32l052dap52
 family:broadcom_64bit