ci(.cm): add .cm files for gitstream

.cm/approve-safe-changes.cm

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+# -*- mode: yaml -*-
+
+manifest:
+  version: 1.0
+
+automations:
+  safe_changes:
+    if:
+      - {{ is.formatting or is.docs or is.tests or is.asset }}
+    run: 
+      - action: add-label@v1
+        args:
+          label: 'safe-changes'
+      - action: approve@v1
+
+# To simplify the automation, this calculation is placed under a unique YAML key.
+# The result is is assigned to `is.formatting`, `is.docs` and `is.tests` which is 
+# used in the automation above. You can add as many keys as you like.
+is:
+  formatting: {{ source.diff.files | isFormattingChange }}
+  docs: {{ files | allDocs }}
+  tests: {{ files | allTests }}
+  asset: {{ files | match(regex=r/\.(png|svg|gif|css)$/) | every }}

.cm/assign-the-relevant-reviewers-to-prs.cm

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+# -*- mode: yaml -*-
+
+manifest:
+  version: 1.0
+
+automations:
+  the_right_reviewer:
+    if: 
+      - true
+    run:
+      - action: add-comment@v1
+        args:
+          comment: |
+            {{ repo | explainRankByGitBlame(gt=25) }}
+      - action: add-reviewers@v1
+        args:
+          reviewers: {{ repo | rankByGitBlame(gt=25) | random }}

.cm/label-prs-by-complexity.cm

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+# -*- mode: yaml -*-
+
+manifest:
+  version: 1.0
+
+automations:
+  estimated_time_to_review:
+    if:
+      - true
+    run:
+      - action: add-label@v1
+        args:
+          label: "{{ calc.etr }} min review"
+          color: {{ 'E94637' if (calc.etr >= 20) else ('FBBD10' if (calc.etr >= 5) else '36A853') }}
+
+# To simplify the automation, this calculation is placed under a unique YAML key.
+# The result is assigned to `calc.etr` which is used in the automation above.
+# You can add as many keys as you like.
+calc:
+  etr: {{ branch | estimatedReviewTime }}

.cm/mark-prs-with-deleted-files.cm

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+# -*- mode: yaml -*-
+
+manifest:
+  version: 1.0
+
+automations:
+  deleted:
+    if:
+      - {{ has.deleted_files }}
+    run: 
+      - action: add-label@v1
+        args:
+          label: 'deleted-files'
+          color: '#DF9C04'
+
+has:
+  deleted_files: {{ source.diff.files | map(attr='new_file') | match(term='/dev/null') | some }}

.cm/mark-prs-without-tests.cm

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+# -*- mode: yaml -*-
+
+manifest:
+  version: 1.0
+
+automations:
+  no_tests:
+    if:
+      - {{ files | match(regex=r/(test|spec)/) | nope }}
+    run: 
+      - action: add-label@v1
+        args:
+          label: 'missing-tests'
+          color: '#E94637'

.cm/more-approvals-for-complex-changes.cm

@@ -0,0 +1,15 @@
+# -*- mode: yaml -*-
+
+manifest:
+  version: 1.0
+
+automations:
+  double_review:
+    if:
+      - {{ branch | estimatedReviewTime >= 30 }}
+      - {{ files | length >= 10 }}
+      - {{ files | match(regex=r/src\//) | some }}
+    run:
+      - action: set-required-approvals@v1
+        args:
+          approvals: 2