feat(meta): initial setup for generating meta json files

.gitignore

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+Brewfile.lock.json

Brewfile

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+# frozen_string_literal: true
+
+brew 'jq'

Makefile

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+TAP = jimeh/emacs-builds
+
+.DEFAULT: update
+
+update: casks cask-shields
+
+#
+# Cask Meta
+#
+
+CASKS = $(notdir $(shell \
+	brew tap-info --json "$(TAP)" | jq -r '.[0].cask_tokens[]' | sort \
+))
+
+CASK_META_FILES = $(foreach c,$(CASKS),Casks/$(c)/meta.json)
+
+casks: $(CASK_META_FILES)
+
+.PHONY: $(CASK_META_FILES)
+$(CASK_META_FILES): Casks/%/meta.json:
+	mkdir -p "$(dir $@)"
+	brew info --cask --json=v2 "$(TAP)/$*" | jq '.casks[0]' > "$@"
+
+#
+# Shields Meta (for shields.io)
+#
+
+CASK_SHIELDS = $(foreach c,$(CASKS),$(if \
+	$(shell test -f "templates/Casks/$(c)/shield.json.tpl" && echo ok),$(c),\
+))
+CASK_SHIELD_FILES = $(foreach c,$(CASK_SHIELDS),Casks/$(c)/shield.json)
+
+cask-shields: $(CASK_SHIELD_FILES)
+
+.PHONY: $(CASK_SHIELD_FILES)
+$(CASK_SHIELD_FILES): Casks/%/shield.json:
+	mkdir -p "$(dir $@)"
+	brew info --cask --json=v2 "$(TAP)/$*" | \
+		jq ".casks[0] | $$(cat "templates/Casks/$*/shield.json.tpl")" > "$@"

templates/Casks/emacs-app-good/shield.json.tpl

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+{
+  schemaVersion: 1,
+  style: "flat",
+  color: "#7F5AB6",
+  namedLogo: "GNU Emacs",
+  logoColor: "white",
+  label: "known good nightly",
+  message: .version
+}

templates/Casks/emacs-app-nightly/shield.json.tpl

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+{
+  schemaVersion: 1,
+  style: "flat",
+  color: "#7F5AB6",
+  namedLogo: "GNU Emacs",
+  logoColor: "white",
+  label: "nightly",
+  message: .version
+}

templates/Casks/emacs-app/shield.json.tpl

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+{
+  schemaVersion: 1,
+  style: "flat",
+  color: "#7F5AB6",
+  namedLogo: "GNU Emacs",
+  logoColor: "white",
+  label: "stable",
+  message: ("v" + .version)
+}