Daniel Fütterer
18.02.21 56795e887def81307eb5710ce2ac82cc269c307b
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
import os.path
 
## To Do
# - Breaking Changes
# - Merge Commits
# - Error Handling
 
def getSeparatedGitLog(repo):
    try:
        stream = os.popen("git -C {} log --format=%B--SEP--%H--SEP--%d--END--".format(repo))
    except:
        raise ValueError("Not a valid git-repository!")
    else:
        gitLog = stream.read()
        commitList = gitLog.split("--END--")
        del commitList[-1]
        return commitList
     
 
class RawCommit:
    def __init__(self, completeCommit):
        self.raw = completeCommit.split("--SEP--")
        self.body = self.raw[0].strip()
        self.hash = self.raw[1].strip()
        self.tag = self.raw[2].strip()
 
 
class CommitBody:
    commitTypes = ("build", "chore", "ci", "docs", "feat", "fix", "perf", "refactor", "style", "test")
    def __init__(self, completeMessage):
        self.completeMessage = completeMessage
        #self.subject = None
        #self.body = None
        #self.scope = None
        #self.commitType = None
 
        self.setSubjectAndBody()
        self.setScope()
        self.setCommitType()
    
    def setSubjectAndBody(self):
        try:
            subStart = self.completeMessage.index(": ")+2
        except:
            try:
                subStart = self.completeMessage.index("\n")
            except:
                subStart = 0
        try:
            subEnd = self.completeMessage.index("\n")
        except:
            self.subject = self.completeMessage[subStart:]
            self.body = None
        else:
            self.subject = self.completeMessage[subStart:subEnd]
            self.body = self.completeMessage[subEnd:].strip()
    
    def setScope(self):
        try:
            start = self.completeMessage.index("(")+1
            end = self.completeMessage.index(")")
        except:
            self.scope = None
        else:
            self.scope = self.completeMessage[start:end]
    
    def setCommitType(self):
        for commitType in self.commitTypes:
            if (self.completeMessage.startswith((commitType + ": "))) or (self.completeMessage.startswith((commitType + "("))):
                self.commitType = commitType
                break
            else:
                self.commitType = "nonconform"
    
    def getCommitMessageWithType(self):
        return self.commitType + ": " + self.subject
        
 
class CommitTag:
    def __init__(self, completeTag):
        if not ("tag: " in completeTag):
            self.completeTag = None
            self.tagAsString = None
            self.major = None
            self.minor = None
            self.bugfix = None
        else:
            self.completeTag = completeTag
            self.setTagAsString()
            self.setMajorMinorBugfix()
 
    def setTagAsString(self):
        try: ## this one is temporary
            self.tagAsString = self.completeTag[(self.completeTag.rindex(": v.")+4):-1]
        except:
            try:
                self.tagAsString = self.completeTag[(self.completeTag.rindex(": v")+3):-1]
            except:
                self.tagAsString = self.completeTag[(self.completeTag.rindex(": ")+2):-1]
 
    def setMajorMinorBugfix(self):
        versionList = self.tagAsString.split(".")
        self.major = versionList[0]
        self.minor = versionList[1]
        self.bugfix = versionList[2]
    
    @staticmethod
    def getUpdateType(newTag, previousTag):
        if newTag.major > previousTag.major:
            return "major"
        elif newTag.minor > previousTag.minor:
            return "minor"
        elif newTag.bugfix > previousTag.bugfix:
            return "bugfix"
 
 
class Commit:
    def __init__(self, rawCommit):
        self.body = CommitBody(rawCommit.body)
        self.tag = CommitTag(rawCommit.tag)
        self.hash = rawCommit.hash
    
    def appendShortHash(self):
        return " (" + self.hash[:6] + ")"
 
 
 
#### Main ####
 
commitList = getSeparatedGitLog("/Users/daniel/Desktop/testrepo")
 
# Create a list of commits
commitHistory = []
for commit in commitList:
    commitHistory.append(Commit(RawCommit(commit)))
 
# Create a two-dimensional list by tags: [[tag, [commits]],[tag, [commits]],...]
taggedHistory = []
for commit in commitHistory:
    if commit.tag.tagAsString:
        taggedHistory.append([commit.tag, commit])
    else:
        if len(taggedHistory) == 0:
            taggedHistory.append([None, commit])
        else:
            taggedHistory[-1].append(commit)
 
 
# Construction of the changelog-file
fileTemplate = ["# Changelog"]
for tag in taggedHistory:
    # A Dictionairy to store grouped commits
    commitsByType = {"Fixes":[], "Features":[], "Other":[], "Nonconform":[]}
    commitsByScope = {}
 
    # If latest commit has no tag:
    if not tag[0]:
        fileTemplate.append("\n## No version number yet ")
    else:
        fileTemplate.append("\n## Version " + tag[0].tagAsString)
 
    # Grouping by CommitTypes
    for commit in tag[1:]:
        # Dealing with scopes
        if commit.body.scope:
            if commit.body.scope not in commitsByScope:
                commitsByScope[commit.body.scope] = [commit]
            else:
                commitsByScope[commit.body.scope].append(commit)
            for scope in commitsByScope:
                fileTemplate.append("### Scope: " + scope)
                for commit in commitsByScope[scope]:
                    fileTemplate.append("- " + commit.body.getCommitMessageWithType() + commit.appendShortHash())
        else:
            # Sorting in predifend groups
            if commit.body.commitType == CommitBody.commitTypes[5]: # fix
                commitsByType["Fixes"].append(commit)
            elif commit.body.commitType == CommitBody.commitTypes[4]: # feat
                commitsByType["Features"].append(commit)
            elif commit.body.commitType == "nonconform":
                commitsByType["Nonconform"].append(commit)
            else:
                commitsByType["Other"].append(commit)
    
    if len(commitsByType["Features"]) != 0:
        fileTemplate.append("### Features")
        for feature in commitsByType["Features"]:
            fileTemplate.append("- " + feature.body.subject + feature.appendShortHash())
    if len(commitsByType["Fixes"]) != 0:
        fileTemplate.append("### Fixes")
        for fix in commitsByType["Fixes"]:
            fileTemplate.append("- " + fix.body.subject + fix.appendShortHash())
    if len(commitsByType["Other"]) != 0:
        fileTemplate.append("### Other")
        for other in commitsByType["Other"]:
            fileTemplate.append("- " + other.body.getCommitMessageWithType() + other.appendShortHash())
    if len(commitsByType["Nonconform"]) != 0:
        fileTemplate.append("### Non-conventional")
        for nonconform in commitsByType["Nonconform"]:
            fileTemplate.append("- " + nonconform.body.subject + nonconform.appendShortHash())
        
 
# write into changelog
with open("changelog.md", "w") as file:
    for line in fileTemplate:
        file.write(line + "\n")