1022 lines
30 KiB
Go
1022 lines
30 KiB
Go
package format
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import (
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"bufio"
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"bytes"
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"fmt"
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"sort"
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"strings"
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"github.com/mitchellh/colorstring"
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"github.com/zclconf/go-cty/cty"
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ctyjson "github.com/zclconf/go-cty/cty/json"
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"github.com/hashicorp/terraform/addrs"
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"github.com/hashicorp/terraform/configs/configschema"
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"github.com/hashicorp/terraform/plans"
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"github.com/hashicorp/terraform/plans/objchange"
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"github.com/hashicorp/terraform/states"
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)
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// ResourceChange returns a string representation of a change to a particular
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// resource, for inclusion in user-facing plan output.
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//
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// The resource schema must be provided along with the change so that the
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// formatted change can reflect the configuration structure for the associated
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// resource.
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//
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// If "color" is non-nil, it will be used to color the result. Otherwise,
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// no color codes will be included.
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func ResourceChange(
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change *plans.ResourceInstanceChangeSrc,
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schema *configschema.Block,
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color *colorstring.Colorize,
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) string {
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addr := change.Addr
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var buf bytes.Buffer
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if color == nil {
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color = &colorstring.Colorize{
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Colors: colorstring.DefaultColors,
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Disable: true,
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Reset: false,
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}
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}
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dispAddr := addr.String()
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if change.DeposedKey != states.NotDeposed {
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dispAddr = fmt.Sprintf("%s (deposed object %s)", dispAddr, change.DeposedKey)
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}
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switch change.Action {
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case plans.Create:
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buf.WriteString(color.Color(fmt.Sprintf("[bold] # %s[reset] will be created", dispAddr)))
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case plans.Read:
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buf.WriteString(color.Color(fmt.Sprintf("[bold] # %s[reset] will be read during apply\n # (config refers to values not yet known)", dispAddr)))
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case plans.Update:
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buf.WriteString(color.Color(fmt.Sprintf("[bold] # %s[reset] will be updated in-place", dispAddr)))
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case plans.Replace:
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buf.WriteString(color.Color(fmt.Sprintf("[bold] # %s[reset] must be [bold][red]replaced", dispAddr)))
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case plans.Delete:
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buf.WriteString(color.Color(fmt.Sprintf("[bold] # %s[reset] will be [bold][red]destroyed", dispAddr)))
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default:
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// should never happen, since the above is exhaustive
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buf.WriteString(fmt.Sprintf("%s has an action the plan renderer doesn't support (this is a bug)", dispAddr))
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}
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buf.WriteString(color.Color("[reset]\n"))
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switch change.Action {
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case plans.Create:
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buf.WriteString(color.Color("[green] +[reset] "))
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case plans.Read:
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buf.WriteString(color.Color("[cyan] <=[reset] "))
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case plans.Update:
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buf.WriteString(color.Color("[yellow] ~[reset] "))
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case plans.Replace:
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buf.WriteString(color.Color("[red]-[reset]/[green]+[reset] "))
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case plans.Delete:
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buf.WriteString(color.Color("[red] -[reset] "))
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default:
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buf.WriteString(color.Color("??? "))
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}
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switch addr.Resource.Resource.Mode {
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case addrs.ManagedResourceMode:
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buf.WriteString(fmt.Sprintf(
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"resource %q %q",
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addr.Resource.Resource.Type,
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addr.Resource.Resource.Name,
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))
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case addrs.DataResourceMode:
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buf.WriteString(fmt.Sprintf(
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"data %q %q ",
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addr.Resource.Resource.Type,
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addr.Resource.Resource.Name,
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))
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default:
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// should never happen, since the above is exhaustive
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buf.WriteString(addr.String())
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}
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buf.WriteString(" {\n")
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p := blockBodyDiffPrinter{
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buf: &buf,
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color: color,
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action: change.Action,
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requiredReplace: change.RequiredReplace,
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}
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// Most commonly-used resources have nested blocks that result in us
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// going at least three traversals deep while we recurse here, so we'll
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// start with that much capacity and then grow as needed for deeper
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// structures.
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path := make(cty.Path, 0, 3)
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changeV, err := change.Decode(schema.ImpliedType())
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if err != nil {
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// Should never happen in here, since we've already been through
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// loads of layers of encode/decode of the planned changes before now.
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panic(fmt.Sprintf("failed to decode plan for %s while rendering diff: %s", addr, err))
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}
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p.writeBlockBodyDiff(schema, changeV.Before, changeV.After, 6, path)
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buf.WriteString(" }\n")
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return buf.String()
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}
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type ctyValueDiff struct {
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Action plans.Action
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Value cty.Value
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}
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type blockBodyDiffPrinter struct {
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buf *bytes.Buffer
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color *colorstring.Colorize
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action plans.Action
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requiredReplace cty.PathSet
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}
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const forcesNewResourceCaption = " [red]# forces replacement[reset]"
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func (p *blockBodyDiffPrinter) writeBlockBodyDiff(schema *configschema.Block, old, new cty.Value, indent int, path cty.Path) {
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path = ctyEnsurePathCapacity(path, 1)
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blankBeforeBlocks := false
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{
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attrNames := make([]string, 0, len(schema.Attributes))
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attrNameLen := 0
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for name := range schema.Attributes {
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oldVal := ctyGetAttrMaybeNull(old, name)
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newVal := ctyGetAttrMaybeNull(new, name)
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if oldVal.IsNull() && newVal.IsNull() {
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// Skip attributes where both old and new values are null
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// (we do this early here so that we'll do our value alignment
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// based on the longest attribute name that has a change, rather
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// than the longest attribute name in the full set.)
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continue
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}
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attrNames = append(attrNames, name)
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if len(name) > attrNameLen {
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attrNameLen = len(name)
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}
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}
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sort.Strings(attrNames)
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if len(attrNames) > 0 {
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blankBeforeBlocks = true
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}
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for _, name := range attrNames {
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attrS := schema.Attributes[name]
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oldVal := ctyGetAttrMaybeNull(old, name)
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newVal := ctyGetAttrMaybeNull(new, name)
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p.writeAttrDiff(name, attrS, oldVal, newVal, attrNameLen, indent, path)
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}
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}
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{
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blockTypeNames := make([]string, 0, len(schema.BlockTypes))
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for name := range schema.BlockTypes {
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blockTypeNames = append(blockTypeNames, name)
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}
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sort.Strings(blockTypeNames)
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for _, name := range blockTypeNames {
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blockS := schema.BlockTypes[name]
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oldVal := ctyGetAttrMaybeNull(old, name)
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newVal := ctyGetAttrMaybeNull(new, name)
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p.writeNestedBlockDiffs(name, blockS, oldVal, newVal, blankBeforeBlocks, indent, path)
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// Always include a blank for any subsequent block types.
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blankBeforeBlocks = true
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}
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}
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}
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func (p *blockBodyDiffPrinter) writeAttrDiff(name string, attrS *configschema.Attribute, old, new cty.Value, nameLen, indent int, path cty.Path) {
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path = append(path, cty.GetAttrStep{Name: name})
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p.buf.WriteString(strings.Repeat(" ", indent))
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showJustNew := false
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var action plans.Action
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switch {
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case old.IsNull():
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action = plans.Create
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showJustNew = true
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case new.IsNull():
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action = plans.Delete
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case ctyEqualWithUnknown(old, new):
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action = plans.NoOp
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showJustNew = true
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default:
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action = plans.Update
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}
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p.writeActionSymbol(action)
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p.buf.WriteString(p.color.Color("[bold]"))
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p.buf.WriteString(name)
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p.buf.WriteString(p.color.Color("[reset]"))
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p.buf.WriteString(strings.Repeat(" ", nameLen-len(name)))
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p.buf.WriteString(" = ")
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if attrS.Sensitive {
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p.buf.WriteString("(sensitive value)")
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} else {
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switch {
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case showJustNew:
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p.writeValue(new, action, indent+2)
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default:
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// We show new even if it is null to emphasize the fact
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// that it is being unset, since otherwise it is easy to
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// misunderstand that the value is still set to the old value.
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p.writeValueDiff(old, new, indent+2, path)
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}
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}
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p.buf.WriteString("\n")
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}
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func (p *blockBodyDiffPrinter) writeNestedBlockDiffs(name string, blockS *configschema.NestedBlock, old, new cty.Value, blankBefore bool, indent int, path cty.Path) {
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path = append(path, cty.GetAttrStep{Name: name})
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if old.IsNull() && new.IsNull() {
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// Nothing to do if both old and new is null
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return
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}
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// Where old/new are collections representing a nesting mode other than
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// NestingSingle, we assume the collection value can never be unknown
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// since we always produce the container for the nested objects, even if
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// the objects within are computed.
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switch blockS.Nesting {
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case configschema.NestingSingle:
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var action plans.Action
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switch {
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case old.IsNull():
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action = plans.Create
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case new.IsNull():
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action = plans.Delete
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case !new.IsKnown() || !old.IsKnown():
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// "old" should actually always be known due to our contract
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// that old values must never be unknown, but we'll allow it
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// anyway to be robust.
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action = plans.Update
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case !(new.Equals(old).True()):
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action = plans.Update
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}
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if blankBefore {
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p.buf.WriteRune('\n')
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}
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p.writeNestedBlockDiff(name, nil, &blockS.Block, action, old, new, indent, path)
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case configschema.NestingList:
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// For the sake of handling nested blocks, we'll treat a null list
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// the same as an empty list since the config language doesn't
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// distinguish these anyway.
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if old.IsNull() {
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old = cty.ListValEmpty(old.Type().ElementType())
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}
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if new.IsNull() {
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new = cty.ListValEmpty(new.Type().ElementType())
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}
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oldItems := ctyCollectionValues(old)
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newItems := ctyCollectionValues(new)
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// Here we intentionally preserve the index-based correspondance
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// between old and new, rather than trying to detect insertions
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// and removals in the list, because this more accurately reflects
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// how Terraform Core and providers will understand the change,
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// particularly when the nested block contains computed attributes
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// that will themselves maintain correspondance by index.
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// commonLen is number of elements that exist in both lists, which
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// will be presented as updates (~). Any additional items in one
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// of the lists will be presented as either creates (+) or deletes (-)
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// depending on which list they belong to.
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var commonLen int
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switch {
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case len(oldItems) < len(newItems):
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commonLen = len(oldItems)
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default:
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commonLen = len(newItems)
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}
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if blankBefore && (len(oldItems) > 0 || len(newItems) > 0) {
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p.buf.WriteRune('\n')
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}
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for i := 0; i < commonLen; i++ {
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path := append(path, cty.IndexStep{Key: cty.NumberIntVal(int64(i))})
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oldItem := oldItems[i]
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newItem := newItems[i]
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p.writeNestedBlockDiff(name, nil, &blockS.Block, plans.Update, oldItem, newItem, indent, path)
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}
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for i := commonLen; i < len(oldItems); i++ {
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path := append(path, cty.IndexStep{Key: cty.NumberIntVal(int64(i))})
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oldItem := oldItems[i]
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newItem := cty.NullVal(oldItem.Type())
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p.writeNestedBlockDiff(name, nil, &blockS.Block, plans.Delete, oldItem, newItem, indent, path)
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}
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for i := commonLen; i < len(newItems); i++ {
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path := append(path, cty.IndexStep{Key: cty.NumberIntVal(int64(i))})
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newItem := newItems[i]
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oldItem := cty.NullVal(newItem.Type())
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p.writeNestedBlockDiff(name, nil, &blockS.Block, plans.Create, oldItem, newItem, indent, path)
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}
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case configschema.NestingSet:
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// For the sake of handling nested blocks, we'll treat a null set
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// the same as an empty set since the config language doesn't
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// distinguish these anyway.
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if old.IsNull() {
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old = cty.SetValEmpty(old.Type().ElementType())
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}
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if new.IsNull() {
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new = cty.SetValEmpty(new.Type().ElementType())
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}
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oldItems := ctyCollectionValues(old)
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newItems := ctyCollectionValues(new)
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if (len(oldItems) + len(newItems)) == 0 {
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// Nothing to do if both sets are empty
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return
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}
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allItems := make([]cty.Value, 0, len(oldItems)+len(newItems))
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allItems = append(allItems, oldItems...)
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allItems = append(allItems, newItems...)
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all := cty.SetVal(allItems)
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if blankBefore {
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p.buf.WriteRune('\n')
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}
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for it := all.ElementIterator(); it.Next(); {
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_, val := it.Element()
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var action plans.Action
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var oldValue, newValue cty.Value
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switch {
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case !old.HasElement(val).True():
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action = plans.Create
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oldValue = cty.NullVal(val.Type())
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newValue = val
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case !new.HasElement(val).True():
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action = plans.Delete
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oldValue = val
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newValue = cty.NullVal(val.Type())
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default:
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action = plans.NoOp
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oldValue = val
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newValue = val
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}
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path := append(path, cty.IndexStep{Key: val})
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p.writeNestedBlockDiff(name, nil, &blockS.Block, action, oldValue, newValue, indent, path)
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}
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case configschema.NestingMap:
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// TODO: Implement this, once helper/schema is actually able to
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// produce schemas containing nested map block types.
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}
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}
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func (p *blockBodyDiffPrinter) writeNestedBlockDiff(name string, label *string, blockS *configschema.Block, action plans.Action, old, new cty.Value, indent int, path cty.Path) {
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p.buf.WriteString(strings.Repeat(" ", indent))
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p.writeActionSymbol(action)
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|
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if label != nil {
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fmt.Fprintf(p.buf, "%s %q {", name, label)
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} else {
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fmt.Fprintf(p.buf, "%s {", name)
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}
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|
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if action != plans.NoOp && (p.pathForcesNewResource(path) || p.pathForcesNewResource(path[:len(path)-1])) {
|
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p.buf.WriteString(p.color.Color(forcesNewResourceCaption))
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}
|
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p.buf.WriteString("\n")
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p.writeBlockBodyDiff(blockS, old, new, indent+4, path)
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p.buf.WriteString(strings.Repeat(" ", indent+2))
|
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p.buf.WriteString("}\n")
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}
|
|
|
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func (p *blockBodyDiffPrinter) writeValue(val cty.Value, action plans.Action, indent int) {
|
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if !val.IsKnown() {
|
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p.buf.WriteString("(known after apply)")
|
|
return
|
|
}
|
|
if val.IsNull() {
|
|
p.buf.WriteString("null")
|
|
return
|
|
}
|
|
|
|
ty := val.Type()
|
|
|
|
switch {
|
|
case ty.IsPrimitiveType():
|
|
switch ty {
|
|
case cty.String:
|
|
{
|
|
// Special behavior for JSON strings containing array or object
|
|
src := []byte(val.AsString())
|
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ty, err := ctyjson.ImpliedType(src)
|
|
if err == nil && !ty.IsPrimitiveType() {
|
|
jv, err := ctyjson.Unmarshal(src, ty)
|
|
if err == nil {
|
|
p.buf.WriteString("jsonencode(")
|
|
p.buf.WriteByte('\n')
|
|
p.buf.WriteString(strings.Repeat(" ", indent+4))
|
|
p.writeValue(jv, action, indent+4)
|
|
p.buf.WriteByte('\n')
|
|
p.buf.WriteString(strings.Repeat(" ", indent))
|
|
p.buf.WriteByte(')')
|
|
break // don't *also* do the normal behavior below
|
|
}
|
|
}
|
|
}
|
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fmt.Fprintf(p.buf, "%q", val.AsString())
|
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case cty.Bool:
|
|
if val.True() {
|
|
p.buf.WriteString("true")
|
|
} else {
|
|
p.buf.WriteString("false")
|
|
}
|
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case cty.Number:
|
|
bf := val.AsBigFloat()
|
|
p.buf.WriteString(bf.Text('f', -1))
|
|
default:
|
|
// should never happen, since the above is exhaustive
|
|
fmt.Fprintf(p.buf, "%#v", val)
|
|
}
|
|
case ty.IsListType() || ty.IsSetType() || ty.IsTupleType():
|
|
p.buf.WriteString("[\n")
|
|
|
|
it := val.ElementIterator()
|
|
for it.Next() {
|
|
_, val := it.Element()
|
|
p.buf.WriteString(strings.Repeat(" ", indent+2))
|
|
p.writeActionSymbol(action)
|
|
p.writeValue(val, action, indent+4)
|
|
p.buf.WriteString(",\n")
|
|
}
|
|
|
|
p.buf.WriteString(strings.Repeat(" ", indent))
|
|
p.buf.WriteString("]")
|
|
case ty.IsMapType():
|
|
p.buf.WriteString("{\n")
|
|
|
|
keyLen := 0
|
|
for it := val.ElementIterator(); it.Next(); {
|
|
key, _ := it.Element()
|
|
if keyStr := key.AsString(); len(keyStr) > keyLen {
|
|
keyLen = len(keyStr)
|
|
}
|
|
}
|
|
|
|
for it := val.ElementIterator(); it.Next(); {
|
|
key, val := it.Element()
|
|
p.buf.WriteString(strings.Repeat(" ", indent+2))
|
|
p.writeActionSymbol(action)
|
|
p.writeValue(key, action, indent+4)
|
|
p.buf.WriteString(strings.Repeat(" ", keyLen-len(key.AsString())))
|
|
p.buf.WriteString(" = ")
|
|
p.writeValue(val, action, indent+4)
|
|
p.buf.WriteString("\n")
|
|
}
|
|
|
|
p.buf.WriteString(strings.Repeat(" ", indent))
|
|
p.buf.WriteString("}")
|
|
case ty.IsObjectType():
|
|
p.buf.WriteString("{\n")
|
|
|
|
atys := ty.AttributeTypes()
|
|
attrNames := make([]string, 0, len(atys))
|
|
nameLen := 0
|
|
for attrName := range atys {
|
|
attrNames = append(attrNames, attrName)
|
|
if len(attrName) > nameLen {
|
|
nameLen = len(attrName)
|
|
}
|
|
}
|
|
sort.Strings(attrNames)
|
|
|
|
for _, attrName := range attrNames {
|
|
val := val.GetAttr(attrName)
|
|
p.buf.WriteString(strings.Repeat(" ", indent+2))
|
|
p.writeActionSymbol(action)
|
|
p.buf.WriteString(attrName)
|
|
p.buf.WriteString(strings.Repeat(" ", nameLen-len(attrName)))
|
|
p.buf.WriteString(" = ")
|
|
p.writeValue(val, action, indent+4)
|
|
p.buf.WriteString("\n")
|
|
}
|
|
|
|
p.buf.WriteString(strings.Repeat(" ", indent))
|
|
p.buf.WriteString("}")
|
|
}
|
|
}
|
|
|
|
func (p *blockBodyDiffPrinter) writeValueDiff(old, new cty.Value, indent int, path cty.Path) {
|
|
ty := old.Type()
|
|
|
|
// We have some specialized diff implementations for certain complex
|
|
// values where it's useful to see a visualization of the diff of
|
|
// the nested elements rather than just showing the entire old and
|
|
// new values verbatim.
|
|
// However, these specialized implementations can apply only if both
|
|
// values are known and non-null.
|
|
if old.IsKnown() && new.IsKnown() && !old.IsNull() && !new.IsNull() {
|
|
switch {
|
|
// TODO: object diffs that behave a bit like the map diffs, including if the two object types don't exactly match
|
|
|
|
case ty == cty.String:
|
|
// We have special behavior for both multi-line strings in general
|
|
// and for strings that can parse as JSON. For the JSON handling
|
|
// to apply, both old and new must be valid JSON.
|
|
// For single-line strings that don't parse as JSON we just fall
|
|
// out of this switch block and do the default old -> new rendering.
|
|
oldS := old.AsString()
|
|
newS := new.AsString()
|
|
|
|
{
|
|
// Special behavior for JSON strings containing object or
|
|
// list values.
|
|
oldBytes := []byte(oldS)
|
|
newBytes := []byte(newS)
|
|
oldType, oldErr := ctyjson.ImpliedType(oldBytes)
|
|
newType, newErr := ctyjson.ImpliedType(newBytes)
|
|
if oldErr == nil && newErr == nil && !(oldType.IsPrimitiveType() && newType.IsPrimitiveType()) {
|
|
oldJV, oldErr := ctyjson.Unmarshal(oldBytes, oldType)
|
|
newJV, newErr := ctyjson.Unmarshal(newBytes, newType)
|
|
if oldErr == nil && newErr == nil {
|
|
if !oldJV.RawEquals(newJV) { // two JSON values may differ only in insignificant whitespace
|
|
p.buf.WriteString("jsonencode(")
|
|
p.buf.WriteByte('\n')
|
|
p.buf.WriteString(strings.Repeat(" ", indent+2))
|
|
p.writeActionSymbol(plans.Update)
|
|
p.writeValueDiff(oldJV, newJV, indent+4, path)
|
|
p.buf.WriteByte('\n')
|
|
p.buf.WriteString(strings.Repeat(" ", indent))
|
|
p.buf.WriteByte(')')
|
|
} else {
|
|
// if they differ only in insigificant whitespace
|
|
// then we'll note that but still expand out the
|
|
// effective value.
|
|
if p.pathForcesNewResource(path) {
|
|
p.buf.WriteString(p.color.Color("jsonencode( [red]# whitespace changes force replacement[reset]"))
|
|
} else {
|
|
p.buf.WriteString(p.color.Color("jsonencode( [dim]# whitespace changes[reset]"))
|
|
}
|
|
p.buf.WriteByte('\n')
|
|
p.buf.WriteString(strings.Repeat(" ", indent+4))
|
|
p.writeValue(oldJV, plans.NoOp, indent+4)
|
|
p.buf.WriteByte('\n')
|
|
p.buf.WriteString(strings.Repeat(" ", indent))
|
|
p.buf.WriteByte(')')
|
|
}
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
if strings.Index(oldS, "\n") < 0 && strings.Index(newS, "\n") < 0 {
|
|
break
|
|
}
|
|
|
|
p.buf.WriteString("<<~EOT")
|
|
if p.pathForcesNewResource(path) {
|
|
p.buf.WriteString(p.color.Color(forcesNewResourceCaption))
|
|
}
|
|
p.buf.WriteString("\n")
|
|
|
|
var oldLines, newLines []cty.Value
|
|
{
|
|
r := strings.NewReader(oldS)
|
|
sc := bufio.NewScanner(r)
|
|
for sc.Scan() {
|
|
oldLines = append(oldLines, cty.StringVal(sc.Text()))
|
|
}
|
|
}
|
|
{
|
|
r := strings.NewReader(newS)
|
|
sc := bufio.NewScanner(r)
|
|
for sc.Scan() {
|
|
newLines = append(newLines, cty.StringVal(sc.Text()))
|
|
}
|
|
}
|
|
|
|
diffLines := ctySequenceDiff(oldLines, newLines)
|
|
for _, diffLine := range diffLines {
|
|
line := diffLine.Value.AsString()
|
|
switch diffLine.Action {
|
|
case plans.Create:
|
|
p.buf.WriteString(strings.Repeat(" ", indent+2))
|
|
p.buf.WriteString(p.color.Color("[green]+[reset] "))
|
|
p.buf.WriteString(line)
|
|
p.buf.WriteString("\n")
|
|
case plans.Delete:
|
|
p.buf.WriteString(strings.Repeat(" ", indent+2))
|
|
p.buf.WriteString(p.color.Color("[red]-[reset] "))
|
|
p.buf.WriteString(line)
|
|
p.buf.WriteString("\n")
|
|
case plans.NoOp:
|
|
p.buf.WriteString(strings.Repeat(" ", indent+2))
|
|
p.buf.WriteString(p.color.Color(" "))
|
|
p.buf.WriteString(line)
|
|
p.buf.WriteString("\n")
|
|
default:
|
|
// Should never happen since the above covers all
|
|
// actions that ctySequenceDiff can return.
|
|
p.buf.WriteString(strings.Repeat(" ", indent+2))
|
|
p.buf.WriteString(p.color.Color("? "))
|
|
p.buf.WriteString(line)
|
|
p.buf.WriteString("\n")
|
|
}
|
|
}
|
|
|
|
p.buf.WriteString(strings.Repeat(" ", indent)) // +4 here because there's no symbol
|
|
p.buf.WriteString("EOT")
|
|
|
|
return
|
|
|
|
case ty.IsSetType():
|
|
p.buf.WriteString("[")
|
|
if p.pathForcesNewResource(path) {
|
|
p.buf.WriteString(p.color.Color(forcesNewResourceCaption))
|
|
}
|
|
p.buf.WriteString("\n")
|
|
|
|
var addedVals, removedVals, allVals []cty.Value
|
|
for it := old.ElementIterator(); it.Next(); {
|
|
_, val := it.Element()
|
|
allVals = append(allVals, val)
|
|
if new.HasElement(val).False() {
|
|
removedVals = append(removedVals, val)
|
|
}
|
|
}
|
|
for it := new.ElementIterator(); it.Next(); {
|
|
_, val := it.Element()
|
|
allVals = append(allVals, val)
|
|
if old.HasElement(val).False() {
|
|
addedVals = append(addedVals, val)
|
|
}
|
|
}
|
|
|
|
var all, added, removed cty.Value
|
|
if len(allVals) > 0 {
|
|
all = cty.SetVal(allVals)
|
|
} else {
|
|
all = cty.SetValEmpty(ty.ElementType())
|
|
}
|
|
if len(addedVals) > 0 {
|
|
added = cty.SetVal(addedVals)
|
|
} else {
|
|
added = cty.SetValEmpty(ty.ElementType())
|
|
}
|
|
if len(removedVals) > 0 {
|
|
removed = cty.SetVal(removedVals)
|
|
} else {
|
|
removed = cty.SetValEmpty(ty.ElementType())
|
|
}
|
|
|
|
for it := all.ElementIterator(); it.Next(); {
|
|
_, val := it.Element()
|
|
|
|
p.buf.WriteString(strings.Repeat(" ", indent+2))
|
|
|
|
var action plans.Action
|
|
switch {
|
|
case added.HasElement(val).True():
|
|
action = plans.Create
|
|
case removed.HasElement(val).True():
|
|
action = plans.Delete
|
|
default:
|
|
action = plans.NoOp
|
|
}
|
|
|
|
p.writeActionSymbol(action)
|
|
p.writeValue(val, action, indent+4)
|
|
p.buf.WriteString(",\n")
|
|
}
|
|
|
|
p.buf.WriteString(strings.Repeat(" ", indent))
|
|
p.buf.WriteString("]")
|
|
return
|
|
|
|
case ty.IsListType() || ty.IsTupleType():
|
|
p.buf.WriteString("[")
|
|
if p.pathForcesNewResource(path) {
|
|
p.buf.WriteString(p.color.Color(forcesNewResourceCaption))
|
|
}
|
|
p.buf.WriteString("\n")
|
|
|
|
elemDiffs := ctySequenceDiff(old.AsValueSlice(), new.AsValueSlice())
|
|
for _, elemDiff := range elemDiffs {
|
|
p.buf.WriteString(strings.Repeat(" ", indent+2))
|
|
p.writeActionSymbol(elemDiff.Action)
|
|
p.writeValue(elemDiff.Value, elemDiff.Action, indent+4)
|
|
p.buf.WriteString(",\n")
|
|
}
|
|
|
|
p.buf.WriteString(strings.Repeat(" ", indent))
|
|
p.buf.WriteString("]")
|
|
return
|
|
|
|
case ty.IsMapType():
|
|
p.buf.WriteString("{")
|
|
if p.pathForcesNewResource(path) {
|
|
p.buf.WriteString(p.color.Color(forcesNewResourceCaption))
|
|
}
|
|
p.buf.WriteString("\n")
|
|
|
|
var allKeys []string
|
|
keyLen := 0
|
|
for it := old.ElementIterator(); it.Next(); {
|
|
k, _ := it.Element()
|
|
keyStr := k.AsString()
|
|
allKeys = append(allKeys, keyStr)
|
|
if len(keyStr) > keyLen {
|
|
keyLen = len(keyStr)
|
|
}
|
|
}
|
|
for it := new.ElementIterator(); it.Next(); {
|
|
k, _ := it.Element()
|
|
keyStr := k.AsString()
|
|
allKeys = append(allKeys, keyStr)
|
|
if len(keyStr) > keyLen {
|
|
keyLen = len(keyStr)
|
|
}
|
|
}
|
|
|
|
sort.Strings(allKeys)
|
|
|
|
lastK := ""
|
|
for i, k := range allKeys {
|
|
if i > 0 && lastK == k {
|
|
continue // skip duplicates (list is sorted)
|
|
}
|
|
lastK = k
|
|
|
|
p.buf.WriteString(strings.Repeat(" ", indent+2))
|
|
kV := cty.StringVal(k)
|
|
var action plans.Action
|
|
if old.HasIndex(kV).False() {
|
|
action = plans.Create
|
|
} else if new.HasIndex(kV).False() {
|
|
action = plans.Delete
|
|
} else if eqV := old.Index(kV).Equals(new.Index(kV)); eqV.IsKnown() && eqV.True() {
|
|
action = plans.NoOp
|
|
} else {
|
|
action = plans.Update
|
|
}
|
|
|
|
path := append(path, cty.IndexStep{Key: kV})
|
|
|
|
p.writeActionSymbol(action)
|
|
p.writeValue(kV, action, indent+4)
|
|
p.buf.WriteString(strings.Repeat(" ", keyLen-len(k)))
|
|
p.buf.WriteString(" = ")
|
|
switch action {
|
|
case plans.Create, plans.NoOp:
|
|
v := new.Index(kV)
|
|
p.writeValue(v, action, indent+4)
|
|
case plans.Delete:
|
|
oldV := old.Index(kV)
|
|
newV := cty.NullVal(oldV.Type())
|
|
p.writeValueDiff(oldV, newV, indent+4, path)
|
|
default:
|
|
oldV := old.Index(kV)
|
|
newV := new.Index(kV)
|
|
p.writeValueDiff(oldV, newV, indent+4, path)
|
|
}
|
|
|
|
p.buf.WriteByte('\n')
|
|
}
|
|
|
|
p.buf.WriteString(strings.Repeat(" ", indent))
|
|
p.buf.WriteString("}")
|
|
return
|
|
}
|
|
}
|
|
|
|
// In all other cases, we just show the new and old values as-is
|
|
p.writeValue(old, plans.Delete, indent)
|
|
p.buf.WriteString(p.color.Color(" [yellow]->[reset] "))
|
|
p.writeValue(new, plans.Create, indent)
|
|
if p.pathForcesNewResource(path) {
|
|
p.buf.WriteString(p.color.Color(forcesNewResourceCaption))
|
|
}
|
|
}
|
|
|
|
// writeActionSymbol writes a symbol to represent the given action, followed
|
|
// by a space.
|
|
//
|
|
// It only supports the actions that can be represented with a single character:
|
|
// Create, Delete, Update and NoAction.
|
|
func (p *blockBodyDiffPrinter) writeActionSymbol(action plans.Action) {
|
|
switch action {
|
|
case plans.Create:
|
|
p.buf.WriteString(p.color.Color("[green]+[reset] "))
|
|
case plans.Delete:
|
|
p.buf.WriteString(p.color.Color("[red]-[reset] "))
|
|
case plans.Update:
|
|
p.buf.WriteString(p.color.Color("[yellow]~[reset] "))
|
|
case plans.NoOp:
|
|
p.buf.WriteString(" ")
|
|
default:
|
|
// Should never happen
|
|
p.buf.WriteString(p.color.Color("? "))
|
|
}
|
|
}
|
|
|
|
func (p *blockBodyDiffPrinter) pathForcesNewResource(path cty.Path) bool {
|
|
if p.action != plans.Replace {
|
|
// "requiredReplace" only applies when the instance is being replaced
|
|
return false
|
|
}
|
|
return p.requiredReplace.Has(path)
|
|
}
|
|
|
|
func ctyGetAttrMaybeNull(val cty.Value, name string) cty.Value {
|
|
if val.IsNull() {
|
|
ty := val.Type().AttributeType(name)
|
|
return cty.NullVal(ty)
|
|
}
|
|
|
|
return val.GetAttr(name)
|
|
}
|
|
|
|
func ctyCollectionValues(val cty.Value) []cty.Value {
|
|
ret := make([]cty.Value, 0, val.LengthInt())
|
|
for it := val.ElementIterator(); it.Next(); {
|
|
_, value := it.Element()
|
|
ret = append(ret, value)
|
|
}
|
|
return ret
|
|
}
|
|
|
|
func ctySequenceDiff(old, new []cty.Value) []ctyValueDiff {
|
|
var ret []ctyValueDiff
|
|
lcs := objchange.LongestCommonSubsequence(old, new)
|
|
var oldI, newI, lcsI int
|
|
for oldI < len(old) || newI < len(new) || lcsI < len(lcs) {
|
|
for oldI < len(old) && (lcsI >= len(lcs) || !old[oldI].RawEquals(lcs[lcsI])) {
|
|
ret = append(ret, ctyValueDiff{
|
|
Action: plans.Delete,
|
|
Value: old[oldI],
|
|
})
|
|
oldI++
|
|
}
|
|
for newI < len(new) && (lcsI >= len(lcs) || !new[newI].RawEquals(lcs[lcsI])) {
|
|
ret = append(ret, ctyValueDiff{
|
|
Action: plans.Create,
|
|
Value: new[newI],
|
|
})
|
|
newI++
|
|
}
|
|
if lcsI < len(lcs) {
|
|
ret = append(ret, ctyValueDiff{
|
|
Action: plans.NoOp,
|
|
Value: new[newI],
|
|
})
|
|
|
|
// All of our indexes advance together now, since the line
|
|
// is common to all three sequences.
|
|
lcsI++
|
|
oldI++
|
|
newI++
|
|
}
|
|
}
|
|
return ret
|
|
}
|
|
|
|
// ctyObjectSequenceDiff is a variant of ctySequenceDiff that only works for
|
|
// values of object types. Whereas ctySequenceDiff can only return Create
|
|
// and Delete actions, this function can additionally return Update actions
|
|
// heuristically based on similarity of objects in the lists, which must
|
|
// be greater than or equal to the caller-specified threshold.
|
|
//
|
|
// See ctyObjectSimilarity for details on what "similarity" means here.
|
|
func ctyObjectSequenceDiff(old, new []cty.Value, threshold float64) []*plans.Change {
|
|
var ret []*plans.Change
|
|
lcs := objchange.LongestCommonSubsequence(old, new)
|
|
var oldI, newI, lcsI int
|
|
for oldI < len(old) || newI < len(new) || lcsI < len(lcs) {
|
|
for oldI < len(old) && (lcsI >= len(lcs) || !old[oldI].RawEquals(lcs[lcsI])) {
|
|
if newI < len(new) {
|
|
// See if the next "new" is similar enough to our "old" that
|
|
// we'll treat this as an Update rather than a Delete/Create.
|
|
similarity := ctyObjectSimilarity(old[oldI], new[newI])
|
|
if similarity >= threshold {
|
|
ret = append(ret, &plans.Change{
|
|
Action: plans.Update,
|
|
Before: old[oldI],
|
|
After: new[newI],
|
|
})
|
|
oldI++
|
|
newI++ // we also consume the next "new" in this case
|
|
continue
|
|
}
|
|
}
|
|
|
|
ret = append(ret, &plans.Change{
|
|
Action: plans.Delete,
|
|
Before: old[oldI],
|
|
After: cty.NullVal(old[oldI].Type()),
|
|
})
|
|
oldI++
|
|
}
|
|
for newI < len(new) && (lcsI >= len(lcs) || !new[newI].RawEquals(lcs[lcsI])) {
|
|
ret = append(ret, &plans.Change{
|
|
Action: plans.Create,
|
|
Before: cty.NullVal(new[newI].Type()),
|
|
After: new[newI],
|
|
})
|
|
newI++
|
|
}
|
|
if lcsI < len(lcs) {
|
|
ret = append(ret, &plans.Change{
|
|
Action: plans.NoOp,
|
|
Before: new[newI],
|
|
After: new[newI],
|
|
})
|
|
|
|
// All of our indexes advance together now, since the line
|
|
// is common to all three sequences.
|
|
lcsI++
|
|
oldI++
|
|
newI++
|
|
}
|
|
}
|
|
return ret
|
|
}
|
|
|
|
// ctyObjectSimilarity returns a number between 0 and 1 that describes
|
|
// approximately how similar the two given values are, comparing in terms of
|
|
// how many of the corresponding attributes have the same value in both
|
|
// objects.
|
|
//
|
|
// This function expects the two values to have a similar set of attribute
|
|
// names, though doesn't mind if the two slightly differ since it will
|
|
// count missing attributes as differences.
|
|
//
|
|
// This function will panic if either of the given values is not an object.
|
|
func ctyObjectSimilarity(old, new cty.Value) float64 {
|
|
oldType := old.Type()
|
|
newType := new.Type()
|
|
attrNames := make(map[string]struct{})
|
|
for name := range oldType.AttributeTypes() {
|
|
attrNames[name] = struct{}{}
|
|
}
|
|
for name := range newType.AttributeTypes() {
|
|
attrNames[name] = struct{}{}
|
|
}
|
|
|
|
matches := 0
|
|
|
|
for name := range attrNames {
|
|
if !oldType.HasAttribute(name) {
|
|
continue
|
|
}
|
|
if !newType.HasAttribute(name) {
|
|
continue
|
|
}
|
|
eq := old.GetAttr(name).Equals(new.GetAttr(name))
|
|
if !eq.IsKnown() {
|
|
continue
|
|
}
|
|
if eq.True() {
|
|
matches++
|
|
}
|
|
}
|
|
|
|
return float64(matches) / float64(len(attrNames))
|
|
}
|
|
|
|
func ctyEqualWithUnknown(old, new cty.Value) bool {
|
|
if !old.IsKnown() || !new.IsKnown() {
|
|
return false
|
|
}
|
|
return old.Equals(new).True()
|
|
}
|
|
|
|
func ctyEnsurePathCapacity(path cty.Path, minExtra int) cty.Path {
|
|
if cap(path)-len(path) >= minExtra {
|
|
return path
|
|
}
|
|
newCap := cap(path) * 2
|
|
if newCap < (len(path) + minExtra) {
|
|
newCap = len(path) + minExtra
|
|
}
|
|
newPath := make(cty.Path, len(path), newCap)
|
|
copy(newPath, path)
|
|
return newPath
|
|
}
|