feat: get repo version from historical tags instead of config file

repo version will get from historical tags. init 0.0.0 if fail of find any version tag

semantic_release/history/__init__.py

@@ -3,7 +3,7 @@
 import semver
 
 from ..settings import config
-from ..vcs_helpers import get_commit_log
+from ..vcs_helpers import get_commit_log, get_last_version
 from .logs import evaluate_version_bump  # noqa
 
 from .parser_angular import parse_commit_message as angular_parser  # noqa isort:skip
@@ -13,17 +13,15 @@
 def get_current_version():
     """
     Finds the current version of the package in the current working directory.
+    Check tags rather than config file. return 0.0.0 if fails
 
     :return: A string with the version number.
     """
-    filename, variable = config.get('semantic_release', 'version_variable').split(':')
-    variable = variable.strip()
-    with open(filename, 'r') as fd:
-        return re.search(
-            r'^{0}\s*=\s*[\'"]([^\'"]*)[\'"]'.format(variable),
-            fd.read(),
-            re.MULTILINE
-        ).group(1)
+    version = get_last_version()
+    if version:
+        return version
+    else:
+        return '0.0.0'
 
 
 def get_new_version(current_version, level_bump):

semantic_release/history/logs.py

@@ -2,7 +2,7 @@
 
 from ..errors import UnknownCommitMessageStyleError
 from ..settings import config, current_commit_parser
-from ..vcs_helpers import get_commit_log
+from ..vcs_helpers import get_commit_log, get_version_from_tag
 
 LEVELS = {
     1: 'patch',
@@ -31,11 +31,11 @@ def evaluate_version_bump(current_version, force=None):
 
     changes = []
     commit_count = 0
-
-    for commit_message in get_commit_log('v{0}'.format(current_version)):
-        if current_version in commit_message:
-            break
-
+    # we have to first find our the version hash tagged correspondingly
+    version_hash = get_version_from_tag('v{0}'.format(current_version))
+    for commit_message in get_commit_log(version_hash):
+        # since changed the version as tag, it won't show up in commit message
+        # so we could simply get all commits in this version
         try:
             message = current_commit_parser()(commit_message)
             changes.append(message[0])

semantic_release/vcs_helpers.py

@@ -19,6 +19,23 @@ def get_commit_log(from_rev=None):
         yield commit.message
 
 
+def get_last_version():
+    '''
+    return last version from repo tags
+
+    :return: a string contains version number
+    '''
+    tags = len(repo.tags)
+    for i in range(tags - 1, -1, -1):
+        if re.match('v\d+\.\d+\.\d+', repo.tags[i].name):
+            return repo.tags[i].name[1:]
+
+
+def get_version_from_tag(tag_name):
+    for i in repo.tags:
+        if i.name == tag_name:
+            return i.commit.hexsha
+
 def get_repository_owner_and_name():
     """
     Checks the origin remote to get the owner and name of the remote repository.
@@ -47,7 +64,8 @@ def commit_new_version(version):
 
     :param version: The version number to be used in the commit message
     """
-    repo.git.add(config.get('semantic_release', 'version_variable').split(':')[0])
+    repo.git.add(
+        config.get('semantic_release', 'version_variable').split(':')[0])
     return repo.git.commit(m=version, author="semantic-release <semantic-release>")