github.com/adrian-bl/terraform@v0.7.0-rc2.0.20160705220747-de0a34fc3517/terraform/evaltree_provider.go (about)

     1  package terraform
     2  
     3  import (
     4  	"github.com/hashicorp/terraform/config"
     5  )
     6  
     7  // ProviderEvalTree returns the evaluation tree for initializing and
     8  // configuring providers.
     9  func ProviderEvalTree(n string, config *config.RawConfig) EvalNode {
    10  	var provider ResourceProvider
    11  	var resourceConfig *ResourceConfig
    12  
    13  	seq := make([]EvalNode, 0, 5)
    14  	seq = append(seq, &EvalInitProvider{Name: n})
    15  
    16  	// Input stuff
    17  	seq = append(seq, &EvalOpFilter{
    18  		Ops: []walkOperation{walkInput, walkImport},
    19  		Node: &EvalSequence{
    20  			Nodes: []EvalNode{
    21  				&EvalGetProvider{
    22  					Name:   n,
    23  					Output: &provider,
    24  				},
    25  				&EvalInterpolate{
    26  					Config: config,
    27  					Output: &resourceConfig,
    28  				},
    29  				&EvalBuildProviderConfig{
    30  					Provider: n,
    31  					Config:   &resourceConfig,
    32  					Output:   &resourceConfig,
    33  				},
    34  				&EvalInputProvider{
    35  					Name:     n,
    36  					Provider: &provider,
    37  					Config:   &resourceConfig,
    38  				},
    39  			},
    40  		},
    41  	})
    42  
    43  	seq = append(seq, &EvalOpFilter{
    44  		Ops: []walkOperation{walkValidate},
    45  		Node: &EvalSequence{
    46  			Nodes: []EvalNode{
    47  				&EvalGetProvider{
    48  					Name:   n,
    49  					Output: &provider,
    50  				},
    51  				&EvalInterpolate{
    52  					Config: config,
    53  					Output: &resourceConfig,
    54  				},
    55  				&EvalBuildProviderConfig{
    56  					Provider: n,
    57  					Config:   &resourceConfig,
    58  					Output:   &resourceConfig,
    59  				},
    60  				&EvalValidateProvider{
    61  					Provider: &provider,
    62  					Config:   &resourceConfig,
    63  				},
    64  				&EvalSetProviderConfig{
    65  					Provider: n,
    66  					Config:   &resourceConfig,
    67  				},
    68  			},
    69  		},
    70  	})
    71  
    72  	// Apply stuff
    73  	seq = append(seq, &EvalOpFilter{
    74  		Ops: []walkOperation{walkRefresh, walkPlan, walkApply, walkDestroy, walkImport},
    75  		Node: &EvalSequence{
    76  			Nodes: []EvalNode{
    77  				&EvalGetProvider{
    78  					Name:   n,
    79  					Output: &provider,
    80  				},
    81  				&EvalInterpolate{
    82  					Config: config,
    83  					Output: &resourceConfig,
    84  				},
    85  				&EvalBuildProviderConfig{
    86  					Provider: n,
    87  					Config:   &resourceConfig,
    88  					Output:   &resourceConfig,
    89  				},
    90  				&EvalSetProviderConfig{
    91  					Provider: n,
    92  					Config:   &resourceConfig,
    93  				},
    94  			},
    95  		},
    96  	})
    97  
    98  	// We configure on everything but validate, since validate may
    99  	// not have access to all the variables.
   100  	seq = append(seq, &EvalOpFilter{
   101  		Ops: []walkOperation{walkRefresh, walkPlan, walkApply, walkDestroy, walkImport},
   102  		Node: &EvalSequence{
   103  			Nodes: []EvalNode{
   104  				&EvalConfigProvider{
   105  					Provider: n,
   106  					Config:   &resourceConfig,
   107  				},
   108  			},
   109  		},
   110  	})
   111  
   112  	return &EvalSequence{Nodes: seq}
   113  }
   114  
   115  // CloseProviderEvalTree returns the evaluation tree for closing
   116  // provider connections that aren't needed anymore.
   117  func CloseProviderEvalTree(n string) EvalNode {
   118  	return &EvalCloseProvider{Name: n}
   119  }