docs: deploy using dagger

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

stdlib/dagger/op/op.cue

@@ -40,6 +40,11 @@ package op
 	dir: string
 }
 
+#Workdir: {
+	do:   "workdir"
+	path: string
+}
+
 #Exec: {
 	do: "exec"
 	args: [...string]

stdlib/dagger/op/op_fullop.cue

@@ -12,6 +12,7 @@ package op
 	#Copy |
 	#Load |
 	#Subdir |
+	#Workdir |
 	#WriteFile |
 	#Mkdir |
 	#DockerBuild) & {do: string}

stdlib/git/git.cue

@@ -1,7 +1,9 @@
 package git
 
 import (
+	"dagger.io/dagger"
 	"dagger.io/dagger/op"
+	"dagger.io/alpine"
 )
 
 // A git repository
@@ -23,3 +25,82 @@ import (
 		},
 	]
 }
+
+// Get the name of the current checked out branch or tag
+#CurrentBranch: {
+	repository: dagger.#Artifact @dagger(input)
+	name: {
+		string
+		@dagger(output)
+
+		#up: [
+			op.#Load & {
+				from: alpine.#Image & {
+					package: bash: "=~5.1"
+					package: git:  "=~2.30"
+				}
+			},
+
+			op.#Exec & {
+				mount: "/repository": from: repository
+				dir: "/repository"
+				args: [
+					"/bin/bash",
+					"--noprofile",
+					"--norc",
+					"-eo",
+					"pipefail",
+					"-c",
+					#"""
+						printf "$(git symbolic-ref -q --short HEAD || git describe --tags --exact-match)" > /name.txt
+						"""#,
+				]
+			},
+
+			op.#Export & {
+				source: "/name.txt"
+				format: "string"
+			},
+		]
+	}
+}
+
+// List tags of a repository
+#Tags: {
+	repository: dagger.#Artifact @dagger(input)
+	tags: {
+		[...string]
+		@dagger(output)
+
+		#up: [
+			op.#Load & {
+				from: alpine.#Image & {
+					package: bash: "=~5.1"
+					package: jq:   "=~1.6"
+					package: git:  "=~2.30"
+				}
+			},
+
+			op.#Exec & {
+				mount: "/repository": from: repository
+				dir: "/repository"
+				args: [
+					"/bin/bash",
+					"--noprofile",
+					"--norc",
+					"-eo",
+					"pipefail",
+					"-c",
+					#"""
+						git tag -l | jq --raw-input --slurp 'split("\n") | map(select(. != ""))' > /tags.json
+						"""#,
+				]
+			},
+
+			op.#Export & {
+				source: "/tags.json"
+				format: "json"
+			},
+		]
+	}
+}