forked from runatlantis/atlantis
/
project_finder.go
224 lines (202 loc) · 7.97 KB
/
project_finder.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
// Copyright 2017 HootSuite Media Inc.
//
// Licensed under the Apache License, Version 2.0 (the License);
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an AS IS BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Modified hereafter by contributors to runatlantis/atlantis.
package events
import (
"os"
"path"
"path/filepath"
"strings"
"github.com/docker/docker/pkg/fileutils"
"github.com/pkg/errors"
"github.com/runatlantis/atlantis/server/events/models"
"github.com/runatlantis/atlantis/server/events/yaml/valid"
"github.com/runatlantis/atlantis/server/logging"
)
// ProjectFinder determines what are the terraform project(s) within a repo.
type ProjectFinder interface {
// DetermineProjects returns the list of projects that were modified based on
// the modifiedFiles. The list will be de-duplicated.
DetermineProjects(log *logging.SimpleLogger, modifiedFiles []string, repoFullName string, repoDir string) []models.Project
DetermineProjectsViaConfig(log *logging.SimpleLogger, modifiedFiles []string, config valid.Config, repoDir string) ([]valid.Project, error)
}
// DefaultProjectFinder implements ProjectFinder.
type DefaultProjectFinder struct{}
var excludeList = []string{"terraform.tfstate", "terraform.tfstate.backup"}
// DetermineProjects returns the list of projects that were modified based on
// the modifiedFiles. The list will be de-duplicated.
func (p *DefaultProjectFinder) DetermineProjects(log *logging.SimpleLogger, modifiedFiles []string, repoFullName string, repoDir string) []models.Project {
var projects []models.Project
modifiedTerraformFiles := p.filterToTerraform(modifiedFiles)
if len(modifiedTerraformFiles) == 0 {
return projects
}
log.Info("filtered modified files to %d .tf files: %v",
len(modifiedTerraformFiles), modifiedTerraformFiles)
var dirs []string
for _, modifiedFile := range modifiedTerraformFiles {
projectDir := p.getProjectDir(modifiedFile, repoDir)
if projectDir != "" {
dirs = append(dirs, projectDir)
}
}
uniqueDirs := p.unique(dirs)
// The list of modified files will include files that were deleted. We still
// want to run plan if a file was deleted since that often results in a
// change however we want to remove directories that have been completely
// deleted.
exists := p.filterToDirExists(uniqueDirs, repoDir)
for _, p := range exists {
projects = append(projects, models.NewProject(repoFullName, p))
}
log.Info("there are %d modified project(s) at path(s): %v",
len(projects), strings.Join(exists, ", "))
return projects
}
// DetermineProjectsViaConfig returns the list of projects that were modified
// based on the modifiedFiles and config. We look at the WhenModified section
// of the config for each project and see if the modifiedFiles matches.
// The list will be de-duplicated.
func (p *DefaultProjectFinder) DetermineProjectsViaConfig(log *logging.SimpleLogger, modifiedFiles []string, config valid.Config, repoDir string) ([]valid.Project, error) {
var projects []valid.Project
for _, project := range config.Projects {
log.Debug("checking if project at dir %q workspace %q was modified", project.Dir, project.Workspace)
// Prepend project dir to when modified patterns because the patterns
// are relative to the project dirs but our list of modified files is
// relative to the repo root.
var whenModifiedRelToRepoRoot []string
for _, wm := range project.Autoplan.WhenModified {
whenModifiedRelToRepoRoot = append(whenModifiedRelToRepoRoot, filepath.Join(project.Dir, wm))
}
pm, err := fileutils.NewPatternMatcher(whenModifiedRelToRepoRoot)
if err != nil {
return nil, errors.Wrapf(err, "matching modified files with patterns: %v", project.Autoplan.WhenModified)
}
// If any of the modified files matches the pattern then this project is
// considered modified.
for _, file := range modifiedFiles {
match, err := pm.Matches(file)
if err != nil {
log.Debug("match err for file %q: %s", file, err)
continue
}
if match {
log.Debug("file %q matched pattern", file)
_, err := os.Stat(filepath.Join(repoDir, project.Dir))
if err == nil {
projects = append(projects, project)
} else {
log.Debug("project at dir %q not included because dir does not exist", project.Dir)
}
break
}
}
}
return projects, nil
}
func (p *DefaultProjectFinder) filterToTerraform(files []string) []string {
var filtered []string
for _, fileName := range files {
if !p.isInExcludeList(fileName) && strings.Contains(fileName, ".tf") {
filtered = append(filtered, fileName)
}
}
return filtered
}
func (p *DefaultProjectFinder) isInExcludeList(fileName string) bool {
for _, s := range excludeList {
if strings.Contains(fileName, s) {
return true
}
}
return false
}
// getProjectDir attempts to determine based on the location of a modified
// file, where the root of the Terraform project is. It also attempts to verify
// if the root is valid by looking for a main.tf file. It returns a relative
// path to the repo. If the project is at the root returns ".". If modified file
// doesn't lead to a valid project path, returns an empty string.
func (p *DefaultProjectFinder) getProjectDir(modifiedFilePath string, repoDir string) string {
dir := path.Dir(modifiedFilePath)
if path.Base(dir) == "env" {
// If the modified file was inside an env/ directory, we treat this
// specially and run plan one level up. This supports directory structures
// like:
// root/
// main.tf
// env/
// dev.tfvars
// staging.tfvars
return path.Dir(dir)
}
// Surrounding dir with /'s so we can match on /modules/ even if dir is
// "modules" or "project1/modules"
if strings.Contains("/"+dir+"/", "/modules/") {
// We treat changes inside modules/ folders specially. There are two cases:
// 1. modules folder inside project:
// root/
// main.tf
// modules/
// ...
// In this case, if we detect a change in modules/, we will determine
// the project root to be at root/.
//
// 2. shared top-level modules folder
// root/
// project1/
// main.tf # uses modules via ../modules
// project2/
// main.tf # uses modules via ../modules
// modules/
// ...
// In this case, if we detect a change in modules/ we don't know which
// project was using this module so we can't suggest a project root, but we
// also detect that there's no main.tf in the parent folder of modules/
// so we won't suggest that as a project. So in this case we return nothing.
// The code below makes this happen.
// Need to add a trailing slash before splitting on modules/ because if
// the input was modules/file.tf then path.Dir will be "modules" and so our
// split on "modules/" will fail.
dirWithTrailingSlash := dir + "/"
modulesSplit := strings.SplitN(dirWithTrailingSlash, "modules/", 2)
modulesParent := modulesSplit[0]
// Now we check whether there is a main.tf in the parent.
if _, err := os.Stat(filepath.Join(repoDir, modulesParent, "main.tf")); os.IsNotExist(err) {
return ""
}
return path.Clean(modulesParent)
}
// If it wasn't a modules directory, we assume we're in a project and return
// this directory.
return dir
}
func (p *DefaultProjectFinder) unique(strs []string) []string {
hash := make(map[string]bool)
var unique []string
for _, s := range strs {
if !hash[s] {
unique = append(unique, s)
hash[s] = true
}
}
return unique
}
func (p *DefaultProjectFinder) filterToDirExists(relativePaths []string, repoDir string) []string {
var filtered []string
for _, pth := range relativePaths {
absPath := filepath.Join(repoDir, pth)
if _, err := os.Stat(absPath); !os.IsNotExist(err) {
filtered = append(filtered, pth)
}
}
return filtered
}