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Merge pull request #25 from Originate/ck/flatten_map
feat: Add flatten_map module
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| # flatten_map | ||
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| This module flattens a nested map structure into a single-level map (depth of | ||
| one), with the keys being converted to represent their path, delimited by a | ||
| provided separator. If no separator is provided, a period ("`.`") will be used | ||
| by default. | ||
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| > WARNING: Due to Terraform not supporting recursion, this module is bounded to | ||
| > a nesting depth of 20. Values beyond 20 layers deep will not be returned | ||
| > (though it isn't difficult to reverse-engineer this module and extend it to | ||
| > support a larger depth if really needed). | ||
| ## Example | ||
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| Calling the module with: | ||
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| ``` | ||
| module "example" { | ||
| source = "github.com/Originate/terraform-modules//terraform/flatten_map?ref=v1" | ||
| in = { | ||
| a = "foo" | ||
| b = { | ||
| d = 11 | ||
| } | ||
| c = { | ||
| e = true | ||
| f = { | ||
| g = { | ||
| h = ["bar", "baz"] | ||
| } | ||
| } | ||
| } | ||
| } | ||
| separator = "/" | ||
| } | ||
| ``` | ||
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| will give an output of: | ||
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| ``` | ||
| out = { | ||
| "a" = "foo" | ||
| "b/d" = 11 | ||
| "c/e" = true | ||
| "c/f/g/h" = [ | ||
| "bar", | ||
| "baz", | ||
| ] | ||
| } | ||
| ``` |
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| output "out" { | ||
| value = merge( | ||
| { for k, v in var.in : k => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k1, v1 in var.in : merge( | ||
| { for k, v in v1 : join(var.separator, [k1, k]) => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k2, v2 in v1 : merge( | ||
| { for k, v in v2 : join(var.separator, [k1, k2, k]) => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k3, v3 in v2 : merge( | ||
| { for k, v in v3 : join(var.separator, [k1, k2, k3, k]) => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k4, v4 in v3 : merge( | ||
| { for k, v in v4 : join(var.separator, [k1, k2, k3, k4, k]) => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k5, v5 in v4 : merge( | ||
| { for k, v in v5 : join(var.separator, [k1, k2, k3, k4, k5, k]) => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k6, v6 in v5 : merge( | ||
| { for k, v in v6 : join(var.separator, [k1, k2, k3, k4, k5, k6, k]) => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k7, v7 in v6 : merge( | ||
| { for k, v in v7 : join(var.separator, [k1, k2, k3, k4, k5, k6, k7, k]) => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k8, v8 in v7 : merge( | ||
| { for k, v in v8 : join(var.separator, [k1, k2, k3, k4, k5, k6, k7, k8, k]) => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k9, v9 in v8 : merge( | ||
| { for k, v in v9 : join(var.separator, [k1, k2, k3, k4, k5, k6, k7, k8, k9, k]) => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k10, v10 in v9 : merge( | ||
| { for k, v in v10 : join(var.separator, [k1, k2, k3, k4, k5, k6, k7, k8, k9, k10, k]) => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k11, v11 in v10 : merge( | ||
| { for k, v in v11 : join(var.separator, [k1, k2, k3, k4, k5, k6, k7, k8, k9, k10, k11, k]) => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k12, v12 in v11 : merge( | ||
| { for k, v in v12 : join(var.separator, [k1, k2, k3, k4, k5, k6, k7, k8, k9, k10, k11, k12, k]) => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k13, v13 in v12 : merge( | ||
| { for k, v in v13 : join(var.separator, [k1, k2, k3, k4, k5, k6, k7, k8, k9, k10, k11, k12, k13, k]) => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k14, v14 in v13 : merge( | ||
| { for k, v in v14 : join(var.separator, [k1, k2, k3, k4, k5, k6, k7, k8, k9, k10, k11, k12, k13, k14, k]) => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k15, v15 in v14 : merge( | ||
| { for k, v in v15 : join(var.separator, [k1, k2, k3, k4, k5, k6, k7, k8, k9, k10, k11, k12, k13, k14, k15, k]) => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k16, v16 in v15 : merge( | ||
| { for k, v in v16 : join(var.separator, [k1, k2, k3, k4, k5, k6, k7, k8, k9, k10, k11, k12, k13, k14, k15, k16, k]) => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k17, v17 in v16 : merge( | ||
| { for k, v in v17 : join(var.separator, [k1, k2, k3, k4, k5, k6, k7, k8, k9, k10, k11, k12, k13, k14, k15, k16, k17, k]) => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k18, v18 in v17 : merge( | ||
| { for k, v in v18 : join(var.separator, [k1, k2, k3, k4, k5, k6, k7, k8, k9, k10, k11, k12, k13, k14, k15, k16, k17, k18, k]) => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k19, v19 in v18 : merge( | ||
| { for k, v in v19 : join(var.separator, [k1, k2, k3, k4, k5, k6, k7, k8, k9, k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k]) => v if can(tobool(v)) || can(tolist(v)) || can(tonumber(v)) || can(tostring(v)) }, [for k20, v20 in v19 : merge( | ||
| ) if !can(tobool(v20)) && !can(tolist(v20)) && !can(tonumber(v20)) && !can(tostring(v20))]... | ||
| ) if !can(tobool(v19)) && !can(tolist(v19)) && !can(tonumber(v19)) && !can(tostring(v19))]... | ||
| ) if !can(tobool(v18)) && !can(tolist(v18)) && !can(tonumber(v18)) && !can(tostring(v18))]... | ||
| ) if !can(tobool(v17)) && !can(tolist(v17)) && !can(tonumber(v17)) && !can(tostring(v17))]... | ||
| ) if !can(tobool(v16)) && !can(tolist(v16)) && !can(tonumber(v16)) && !can(tostring(v16))]... | ||
| ) if !can(tobool(v15)) && !can(tolist(v15)) && !can(tonumber(v15)) && !can(tostring(v15))]... | ||
| ) if !can(tobool(v14)) && !can(tolist(v14)) && !can(tonumber(v14)) && !can(tostring(v14))]... | ||
| ) if !can(tobool(v13)) && !can(tolist(v13)) && !can(tonumber(v13)) && !can(tostring(v13))]... | ||
| ) if !can(tobool(v12)) && !can(tolist(v12)) && !can(tonumber(v12)) && !can(tostring(v12))]... | ||
| ) if !can(tobool(v11)) && !can(tolist(v11)) && !can(tonumber(v11)) && !can(tostring(v11))]... | ||
| ) if !can(tobool(v10)) && !can(tolist(v10)) && !can(tonumber(v10)) && !can(tostring(v10))]... | ||
| ) if !can(tobool(v9)) && !can(tolist(v9)) && !can(tonumber(v9)) && !can(tostring(v9))]... | ||
| ) if !can(tobool(v8)) && !can(tolist(v8)) && !can(tonumber(v8)) && !can(tostring(v8))]... | ||
| ) if !can(tobool(v7)) && !can(tolist(v7)) && !can(tonumber(v7)) && !can(tostring(v7))]... | ||
| ) if !can(tobool(v6)) && !can(tolist(v6)) && !can(tonumber(v6)) && !can(tostring(v6))]... | ||
| ) if !can(tobool(v5)) && !can(tolist(v5)) && !can(tonumber(v5)) && !can(tostring(v5))]... | ||
| ) if !can(tobool(v4)) && !can(tolist(v4)) && !can(tonumber(v4)) && !can(tostring(v4))]... | ||
| ) if !can(tobool(v3)) && !can(tolist(v3)) && !can(tonumber(v3)) && !can(tostring(v3))]... | ||
| ) if !can(tobool(v2)) && !can(tolist(v2)) && !can(tonumber(v2)) && !can(tostring(v2))]... | ||
| ) if !can(tobool(v1)) && !can(tolist(v1)) && !can(tonumber(v1)) && !can(tostring(v1))]... | ||
| ) | ||
| } |
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| variable "in" { | ||
| description = "The map to flatten (will only flatten up to a depth of 20)" | ||
| type = any | ||
| } | ||
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| variable "separator" { | ||
| description = "Separator to use to separate map path segments" | ||
| type = string | ||
| default = "." | ||
| } |
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| terraform { | ||
| required_version = ">= 1.0" | ||
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| required_providers { | ||
| } | ||
| } |