releasenotes: add custom admonitions support for release notes

By default, the extension has default sections like fix, feature, perf etc.. This
patch allow user to add support for custom admonition. In order to add a custom
admonition, one needs to have a .hgreleasenotes file inside the repository. All the
custom directive with name specified under the tag [sections] will be
usable by the extension. One important thing to keep in mind is if there exists any
custom admonitions with same key as default then they will override the default ones.

hgext/releasenotes.py

@@ -1,441 +1,465 b''
 # Copyright 2017-present Gregory Szorc <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 """generate release notes from commit messages (EXPERIMENTAL)
 
 It is common to maintain files detailing changes in a project between
 releases. Maintaining these files can be difficult and time consuming.
 The :hg:`releasenotes` command provided by this extension makes the
 process simpler by automating it.
 """
 
 from __future__ import absolute_import
 
 import errno
 import re
 import sys
 import textwrap
 
 from mercurial.i18n import _
 from mercurial import (
+    config,
     error,
     minirst,
     registrar,
     scmutil,
+    util,
 )
 
 cmdtable = {}
 command = registrar.command(cmdtable)
 
 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
 # be specifying the version(s) of Mercurial they are tested with, or
 # leave the attribute unspecified.
 testedwith = 'ships-with-hg-core'
 
 DEFAULT_SECTIONS = [
     ('feature', _('New Features')),
     ('bc', _('Backwards Compatibility Changes')),
     ('fix', _('Bug Fixes')),
     ('perf', _('Performance Improvements')),
     ('api', _('API Changes')),
 ]
 
 RE_DIRECTIVE = re.compile('^\.\. ([a-zA-Z0-9_]+)::\s*([^$]+)?$')
 
 BULLET_SECTION = _('Other Changes')
 
 class parsedreleasenotes(object):
     def __init__(self):
         self.sections = {}
 
     def __contains__(self, section):
         return section in self.sections
 
     def __iter__(self):
         return iter(sorted(self.sections))
 
     def addtitleditem(self, section, title, paragraphs):
         """Add a titled release note entry."""
         self.sections.setdefault(section, ([], []))
         self.sections[section][0].append((title, paragraphs))
 
     def addnontitleditem(self, section, paragraphs):
         """Adds a non-titled release note entry.
 
         Will be rendered as a bullet point.
         """
         self.sections.setdefault(section, ([], []))
         self.sections[section][1].append(paragraphs)
 
     def titledforsection(self, section):
         """Returns titled entries in a section.
 
         Returns a list of (title, paragraphs) tuples describing sub-sections.
         """
         return self.sections.get(section, ([], []))[0]
 
     def nontitledforsection(self, section):
         """Returns non-titled, bulleted paragraphs in a section."""
         return self.sections.get(section, ([], []))[1]
 
     def hastitledinsection(self, section, title):
         return any(t[0] == title for t in self.titledforsection(section))
 
     def merge(self, ui, other):
         """Merge another instance into this one.
 
         This is used to combine multiple sources of release notes together.
         """
         for section in other:
             for title, paragraphs in other.titledforsection(section):
                 if self.hastitledinsection(section, title):
                     # TODO prompt for resolution if different and running in
                     # interactive mode.
                     ui.write(_('%s already exists in %s section; ignoring\n') %
                              (title, section))
                     continue
 
                 # TODO perform similarity comparison and try to match against
                 # existing.
                 self.addtitleditem(section, title, paragraphs)
 
             for paragraphs in other.nontitledforsection(section):
                 if paragraphs in self.nontitledforsection(section):
                     continue
 
                 # TODO perform similarily comparison and try to match against
                 # existing.
                 self.addnontitleditem(section, paragraphs)
 
 class releasenotessections(object):
-    def __init__(self, ui):
-        # TODO support defining custom sections from config.
-        self._sections = list(DEFAULT_SECTIONS)
+    def __init__(self, ui, repo=None):
+        if repo:
+            sections = util.sortdict(DEFAULT_SECTIONS)
+            custom_sections = getcustomadmonitions(repo)
+            if custom_sections:
+                sections.update(custom_sections)
+            self._sections = list(sections.iteritems())
+        else:
+            self._sections = list(DEFAULT_SECTIONS)
 
     def __iter__(self):
         return iter(self._sections)
 
     def names(self):
         return [t[0] for t in self._sections]
 
     def sectionfromtitle(self, title):
         for name, value in self._sections:
             if value == title:
                 return name
 
         return None
 
+def getcustomadmonitions(repo):
+    ctx = repo['.']
+    p = config.config()
+
+    def read(f, sections=None, remap=None):
+        if f in ctx:
+            data = ctx[f].data()
+            p.parse(f, data, sections, remap, read)
+        else:
+            raise error.Abort(_(".hgreleasenotes file \'%s\' not found") %
+                              repo.pathto(f))
+
+    if '.hgreleasenotes' in ctx:
+        read('.hgreleasenotes')
+    return p['sections']
+
 def parsenotesfromrevisions(repo, directives, revs):
     notes = parsedreleasenotes()
 
     for rev in revs:
         ctx = repo[rev]
 
         blocks, pruned = minirst.parse(ctx.description(),
                                        admonitions=directives)
 
         for i, block in enumerate(blocks):
             if block['type'] != 'admonition':
                 continue
 
             directive = block['admonitiontitle']
             title = block['lines'][0].strip() if block['lines'] else None
 
             if i + 1 == len(blocks):
                 raise error.Abort(_('release notes directive %s lacks content')
                                   % directive)
 
             # Now search ahead and find all paragraphs attached to this
             # admonition.
             paragraphs = []
             for j in range(i + 1, len(blocks)):
                 pblock = blocks[j]
 
                 # Margin blocks may appear between paragraphs. Ignore them.
                 if pblock['type'] == 'margin':
                     continue
 
                 if pblock['type'] != 'paragraph':
                     raise error.Abort(_('unexpected block in release notes '
                                         'directive %s') % directive)
 
                 if pblock['indent'] > 0:
                     paragraphs.append(pblock['lines'])
                 else:
                     break
 
             # TODO consider using title as paragraph for more concise notes.
             if not paragraphs:
                 raise error.Abort(_('could not find content for release note '
                                     '%s') % directive)
 
             if title:
                 notes.addtitleditem(directive, title, paragraphs)
             else:
                 notes.addnontitleditem(directive, paragraphs)
 
     return notes
 
 def parsereleasenotesfile(sections, text):
     """Parse text content containing generated release notes."""
     notes = parsedreleasenotes()
 
     blocks = minirst.parse(text)[0]
 
     def gatherparagraphsbullets(offset, title=False):
         notefragment = []
 
         for i in range(offset + 1, len(blocks)):
             block = blocks[i]
 
             if block['type'] == 'margin':
                 continue
             elif block['type'] == 'section':
                 break
             elif block['type'] == 'bullet':
                 if block['indent'] != 0:
                     raise error.Abort(_('indented bullet lists not supported'))
                 if title:
                     lines = [l[1:].strip() for l in block['lines']]
                     notefragment.append(lines)
                     continue
                 else:
                     lines = [[l[1:].strip() for l in block['lines']]]
 
                     for block in blocks[i + 1:]:
                         if block['type'] in ('bullet', 'section'):
                             break
                         if block['type'] == 'paragraph':
                             lines.append(block['lines'])
                     notefragment.append(lines)
                     continue
             elif block['type'] != 'paragraph':
                 raise error.Abort(_('unexpected block type in release notes: '
                                     '%s') % block['type'])
             if title:
                 notefragment.append(block['lines'])
 
         return notefragment
 
     currentsection = None
     for i, block in enumerate(blocks):
         if block['type'] != 'section':
             continue
 
         title = block['lines'][0]
 
         # TODO the parsing around paragraphs and bullet points needs some
         # work.
         if block['underline'] == '=':  # main section
             name = sections.sectionfromtitle(title)
             if not name:
                 raise error.Abort(_('unknown release notes section: %s') %
                                   title)
 
             currentsection = name
             bullet_points = gatherparagraphsbullets(i)
             if bullet_points:
                 for para in bullet_points:
                     notes.addnontitleditem(currentsection, para)
 
         elif block['underline'] == '-':  # sub-section
             if title == BULLET_SECTION:
                 bullet_points = gatherparagraphsbullets(i)
                 for para in bullet_points:
                     notes.addnontitleditem(currentsection, para)
             else:
                 paragraphs = gatherparagraphsbullets(i, True)
                 notes.addtitleditem(currentsection, title, paragraphs)
         else:
             raise error.Abort(_('unsupported section type for %s') % title)
 
     return notes
 
 def serializenotes(sections, notes):
     """Serialize release notes from parsed fragments and notes.
 
     This function essentially takes the output of ``parsenotesfromrevisions()``
     and ``parserelnotesfile()`` and produces output combining the 2.
     """
     lines = []
 
     for sectionname, sectiontitle in sections:
         if sectionname not in notes:
             continue
 
         lines.append(sectiontitle)
         lines.append('=' * len(sectiontitle))
         lines.append('')
 
         # First pass to emit sub-sections.
         for title, paragraphs in notes.titledforsection(sectionname):
             lines.append(title)
             lines.append('-' * len(title))
             lines.append('')
 
             wrapper = textwrap.TextWrapper(width=78)
             for i, para in enumerate(paragraphs):
                 if i:
                     lines.append('')
                 lines.extend(wrapper.wrap(' '.join(para)))
 
             lines.append('')
 
         # Second pass to emit bullet list items.
 
         # If the section has titled and non-titled items, we can't
         # simply emit the bullet list because it would appear to come
         # from the last title/section. So, we emit a new sub-section
         # for the non-titled items.
         nontitled = notes.nontitledforsection(sectionname)
         if notes.titledforsection(sectionname) and nontitled:
             # TODO make configurable.
             lines.append(BULLET_SECTION)
             lines.append('-' * len(BULLET_SECTION))
             lines.append('')
 
         for paragraphs in nontitled:
             wrapper = textwrap.TextWrapper(initial_indent='* ',
                                            subsequent_indent='  ',
                                            width=78)
             lines.extend(wrapper.wrap(' '.join(paragraphs[0])))
 
             wrapper = textwrap.TextWrapper(initial_indent='  ',
                                            subsequent_indent='  ',
                                            width=78)
             for para in paragraphs[1:]:
                 lines.append('')
                 lines.extend(wrapper.wrap(' '.join(para)))
 
             lines.append('')
 
     if lines[-1]:
         lines.append('')
 
     return '\n'.join(lines)
 
 @command('releasenotes',
     [('r', 'rev', '', _('revisions to process for release notes'), _('REV'))],
     _('[-r REV] FILE'))
 def releasenotes(ui, repo, file_, rev=None):
     """parse release notes from commit messages into an output file
 
     Given an output file and set of revisions, this command will parse commit
     messages for release notes then add them to the output file.
 
     Release notes are defined in commit messages as ReStructuredText
     directives. These have the form::
 
        .. directive:: title
 
           content
 
     Each ``directive`` maps to an output section in a generated release notes
     file, which itself is ReStructuredText. For example, the ``.. feature::``
     directive would map to a ``New Features`` section.
 
     Release note directives can be either short-form or long-form. In short-
     form, ``title`` is omitted and the release note is rendered as a bullet
     list. In long form, a sub-section with the title ``title`` is added to the
     section.
 
     The ``FILE`` argument controls the output file to write gathered release
     notes to. The format of the file is::
 
        Section 1
        =========
 
        ...
 
        Section 2
        =========
 
        ...
 
     Only sections with defined release notes are emitted.
 
     If a section only has short-form notes, it will consist of bullet list::
 
        Section
        =======
 
        * Release note 1
        * Release note 2
 
     If a section has long-form notes, sub-sections will be emitted::
 
        Section
        =======
 
        Note 1 Title
        ------------
 
        Description of the first long-form note.
 
        Note 2 Title
        ------------
 
        Description of the second long-form note.
 
     If the ``FILE`` argument points to an existing file, that file will be
     parsed for release notes having the format that would be generated by this
     command. The notes from the processed commit messages will be *merged*
     into this parsed set.
 
     During release notes merging:
 
     * Duplicate items are automatically ignored
     * Items that are different are automatically ignored if the similarity is
       greater than a threshold.
 
     This means that the release notes file can be updated independently from
     this command and changes should not be lost when running this command on
     that file. A particular use case for this is to tweak the wording of a
     release note after it has been added to the release notes file.
     """
-    sections = releasenotessections(ui)
+    sections = releasenotessections(ui, repo)
 
     revs = scmutil.revrange(repo, [rev or 'not public()'])
     incoming = parsenotesfromrevisions(repo, sections.names(), revs)
 
     try:
         with open(file_, 'rb') as fh:
             notes = parsereleasenotesfile(sections, fh.read())
     except IOError as e:
         if e.errno != errno.ENOENT:
             raise
 
         notes = parsedreleasenotes()
 
     notes.merge(ui, incoming)
 
     with open(file_, 'wb') as fh:
         fh.write(serializenotes(sections, notes))
 
 @command('debugparsereleasenotes', norepo=True)
-def debugparsereleasenotes(ui, path):
+def debugparsereleasenotes(ui, path, repo=None):
     """parse release notes and print resulting data structure"""
     if path == '-':
         text = sys.stdin.read()
     else:
         with open(path, 'rb') as fh:
             text = fh.read()
 
-    sections = releasenotessections(ui)
+    sections = releasenotessections(ui, repo)
 
     notes = parsereleasenotesfile(sections, text)
 
     for section in notes:
         ui.write(_('section: %s\n') % section)
         for title, paragraphs in notes.titledforsection(section):
             ui.write(_('  subsection: %s\n') % title)
             for para in paragraphs:
                 ui.write(_('    paragraph: %s\n') % ' '.join(para))
 
         for paragraphs in notes.nontitledforsection(section):
             ui.write(_('  bullet point:\n'))
             for para in paragraphs:
                 ui.write(_('    paragraph: %s\n') % ' '.join(para))

tests/test-releasenotes-formatting.t

@@ -1,326 +1,378 b''
   $ cat >> $HGRCPATH << EOF
   > [extensions]
   > releasenotes=
   > EOF
 
   $ hg init simple-repo
   $ cd simple-repo
 
 A fix with a single line results in a bullet point in the appropriate section
 
   $ touch fix1
   $ hg -q commit -A -l - << EOF
   > single line fix
   > 
   > .. fix::
   > 
   >    Simple fix with a single line content entry.
   > EOF
 
   $ hg releasenotes -r . $TESTTMP/relnotes-single-line
 
   $ cat $TESTTMP/relnotes-single-line
   Bug Fixes
   =========
   
   * Simple fix with a single line content entry.
 
 A fix with multiple lines is handled correctly
 
   $ touch fix2
   $ hg -q commit -A -l - << EOF
   > multi line fix
   > 
   > .. fix::
   > 
   >    First line of fix entry.
   >    A line after it without a space.
   > 
   >    A new paragraph in the fix entry. And this is a really long line. It goes on for a while.
   >    And it wraps around to a new paragraph.
   > EOF
 
   $ hg releasenotes -r . $TESTTMP/relnotes-multi-line
   $ cat $TESTTMP/relnotes-multi-line
   Bug Fixes
   =========
   
   * First line of fix entry. A line after it without a space.
   
     A new paragraph in the fix entry. And this is a really long line. It goes on
     for a while. And it wraps around to a new paragraph.
 
 A release note with a title results in a sub-section being written
 
   $ touch fix3
   $ hg -q commit -A -l - << EOF
   > fix with title
   > 
   > .. fix:: Fix Title
   > 
   >    First line of fix with title.
   > 
   >    Another paragraph of fix with title. But this is a paragraph
   >    with multiple lines.
   > EOF
 
   $ hg releasenotes -r . $TESTTMP/relnotes-fix-with-title
   $ cat $TESTTMP/relnotes-fix-with-title
   Bug Fixes
   =========
   
   Fix Title
   ---------
   
   First line of fix with title.
   
   Another paragraph of fix with title. But this is a paragraph with multiple
   lines.
 
   $ cd ..
 
 Formatting of multiple bullet points works
 
   $ hg init multiple-bullets
   $ cd multiple-bullets
   $ touch fix1
   $ hg -q commit -A -l - << EOF
   > commit 1
   > 
   > .. fix::
   > 
   >    first fix
   > EOF
 
   $ touch fix2
   $ hg -q commit -A -l - << EOF
   > commit 2
   > 
   > .. fix::
   > 
   >    second fix
   > 
   >    Second paragraph of second fix.
   > EOF
 
   $ touch fix3
   $ hg -q commit -A -l - << EOF
   > commit 3
   > 
   > .. fix::
   > 
   >    third fix
   > EOF
 
   $ hg releasenotes -r 'all()' $TESTTMP/relnotes-multiple-bullets
   $ cat $TESTTMP/relnotes-multiple-bullets
   Bug Fixes
   =========
   
   * first fix
   
   * second fix
   
     Second paragraph of second fix.
   
   * third fix
 
   $ cd ..
 
 Formatting of multiple sections works
 
   $ hg init multiple-sections
   $ cd multiple-sections
   $ touch fix1
   $ hg -q commit -A -l - << EOF
   > commit 1
   > 
   > .. fix::
   > 
   >    first fix
   > EOF
 
   $ touch feature1
   $ hg -q commit -A -l - << EOF
   > commit 2
   > 
   > .. feature::
   > 
   >    description of the new feature
   > EOF
 
   $ touch fix2
   $ hg -q commit -A -l - << EOF
   > commit 3
   > 
   > .. fix::
   > 
   >    second fix
   > EOF
 
   $ hg releasenotes -r 'all()' $TESTTMP/relnotes-multiple-sections
   $ cat $TESTTMP/relnotes-multiple-sections
   New Features
   ============
   
   * description of the new feature
   
   Bug Fixes
   =========
   
   * first fix
   
   * second fix
 
   $ cd ..
 
 Section with subsections and bullets
 
   $ hg init multiple-subsections
   $ cd multiple-subsections
 
   $ touch fix1
   $ hg -q commit -A -l - << EOF
   > commit 1
   > 
   > .. fix:: Title of First Fix
   > 
   >    First paragraph of first fix.
   > 
   >    Second paragraph of first fix.
   > EOF
 
   $ touch fix2
   $ hg -q commit -A -l - << EOF
   > commit 2
   > 
   > .. fix:: Title of Second Fix
   > 
   >    First paragraph of second fix.
   > 
   >    Second paragraph of second fix.
   > EOF
 
   $ hg releasenotes -r 'all()' $TESTTMP/relnotes-multiple-subsections
   $ cat $TESTTMP/relnotes-multiple-subsections
   Bug Fixes
   =========
   
   Title of First Fix
   ------------------
   
   First paragraph of first fix.
   
   Second paragraph of first fix.
   
   Title of Second Fix
   -------------------
   
   First paragraph of second fix.
   
   Second paragraph of second fix.
 
 Now add bullet points to sections having sub-sections
 
   $ touch fix3
   $ hg -q commit -A -l - << EOF
   > commit 3
   > 
   > .. fix::
   > 
   >    Short summary of fix 3
   > EOF
 
   $ hg releasenotes -r 'all()' $TESTTMP/relnotes-multiple-subsections-with-bullets
   $ cat $TESTTMP/relnotes-multiple-subsections-with-bullets
   Bug Fixes
   =========
   
   Title of First Fix
   ------------------
   
   First paragraph of first fix.
   
   Second paragraph of first fix.
   
   Title of Second Fix
   -------------------
   
   First paragraph of second fix.
   
   Second paragraph of second fix.
   
   Other Changes
   -------------
   
   * Short summary of fix 3
 
+  $ cd ..
+
 Multiple 'Other Changes' sub-sections for every section
 
   $ hg init multiple-otherchanges
   $ cd multiple-otherchanges
 
   $ touch fix1
   $ hg -q commit -A -l - << EOF
   > commit 1
   > 
   > .. fix:: Title of First Fix
   > 
   >    First paragraph of fix 1.
   > EOF
 
   $ touch feature1
   $ hg -q commit -A -l - << EOF
   > commit 2
   > 
   > .. feature:: Title of First Feature
   > 
   >    First paragraph of feature 1.
   > EOF
 
   $ touch feature2
   $ hg -q commit -A -l - << EOF
   > commit 3
   > 
   > .. feature::
   > 
   >    Short summary of feature 2.
   > EOF
 
   $ touch fix2
   $ hg -q commit -A -l - << EOF
   > commit 4
   > 
   > .. fix::
   > 
   >    Short summary of fix 2
   > EOF
 
   $ hg releasenotes -r 'all()' $TESTTMP/relnotes-multiple-otherchanges
   $ cat $TESTTMP/relnotes-multiple-otherchanges
   New Features
   ============
   
   Title of First Feature
   ----------------------
   
   First paragraph of feature 1.
   
   Other Changes
   -------------
   
   * Short summary of feature 2.
   
   Bug Fixes
   =========
   
   Title of First Fix
   ------------------
   
   First paragraph of fix 1.
   
   Other Changes
   -------------
   
   * Short summary of fix 2
 
+  $ cd ..
+
+Using custom sections in notes
+
+  $ hg init custom-section
+  $ cd custom-section
+  $ cat >> .hgreleasenotes << EOF
+  > [sections]
+  > testsection=Name of Section
+  > EOF
+
+  $ touch a
+  $ hg -q commit -A -l - << EOF
+  > commit 1
+  > 
+  > .. testsection::
+  > 
+  >    First paragraph under this admonition.
+  > EOF
+
+  $ hg releasenotes -r . $TESTTMP/relnotes-custom-section
+  $ cat $TESTTMP/relnotes-custom-section
+  Name of Section
+  ===============
+  
+  * First paragraph under this admonition.
+
+Overriding default sections (For eg. by default feature = New Features)
+
+  $ cat >> .hgreleasenotes << EOF
+  > [sections]
+  > feature=Feature Additions
+  > EOF
+
+  $ touch b
+  $ hg -q commit -A -l - << EOF
+  > commit 2
+  > 
+  > .. feature::
+  > 
+  >    Adds a new feature.
+  > EOF
+
+  $ hg releasenotes -r . $TESTTMP/relnotes-override-section
+  $ cat $TESTTMP/relnotes-override-section
+  Feature Additions
+  =================
+  
+  * Adds a new feature.
+