[gcc/devel/rust/master] add script to graph the changes over time

[gcc/devel/rust/master] add script to graph the changes over time

[Thomas Schwinge]

https://gcc.gnu.org/g:04c1f56974505bd2dce5003ba266fdd542a0b218

commit 04c1f56974505bd2dce5003ba266fdd542a0b218
Author: Philip Herron <philip.herron@embecosm.com>
Date:   Fri Dec 17 12:35:03 2021 +0000

    add script to graph the changes over time

Diff:
---
 gcc/rust/monthly-diff.py | 171 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 171 insertions(+)

diff --git a/gcc/rust/monthly-diff.py b/gcc/rust/monthly-diff.py
new file mode 100644
index 00000000000..c14cf14fa5e
--- /dev/null
+++ b/gcc/rust/monthly-diff.py
@@ -0,0 +1,171 @@
+#!/usr/bin/env python3
+
+import matplotlib.pyplot as plt
+import numpy as np
+
+import matplotlib
+import subprocess
+import sys
+import re
+import os
+
+
+try:
+    number_of_weeks = int(sys.argv[1])
+except Exception as e:
+    print("script requires an integer argument for the number of weeks")
+    sys.exit(-1)
+
+
+cwd_is_root_repo = os.path.isdir('.git')
+if not cwd_is_root_repo:
+    print("script must be ran from the root of the repo")
+    sys.exit(-1)
+    
+
+change_list = []
+for i in range(number_of_weeks):
+    since = "%i weeks ago" % (i + 1)
+    until = "%i weeks ago" % i if i > 0 else None
+
+    command = [ "git", "whatchanged", "--since=%s" % since ]
+    if until is not None:
+        command.append("--until=%s" % until)
+
+    specific_paths = [ 'gcc/rust', 'gcc/testsuite/rust', 'gcc/testsuite/rust.test' ]
+    command += ['--'] + specific_paths
+    
+    result = subprocess.run(
+        command, capture_output=True, text=True
+    )
+    raw_diff = result.stdout
+    
+    commit_lines = re.findall('commit [a-z0-9]{40}', raw_diff)
+    commit_shas = list(map(lambda i: i.split(' ')[1], commit_lines))
+
+    changes = {
+        'files_changed': 0,
+        'insertions': 0,
+        'deletions': 0,
+        'contributors': set(),
+        'contributions': list()
+    }
+
+    short_stat_out = None
+    if len(commit_shas) > 0:
+        if len(commit_shas) == 1:
+            short_stat_command = [ 'git', 'show', '%s' % commit_shas[0], '--shortstat' ]
+            result = subprocess.run(
+                short_stat_command, capture_output=True, text=True
+            )
+            raw_short_stat = result.stdout
+            short_stat_out = raw_short_stat.split('\n')[-2].strip()
+        
+        else:
+            from_sha = commit_shas[-1]
+            to_sha = commit_shas[0]
+            short_stat_command = [ 'git', 'diff', '%s..%s' % (from_sha, to_sha), '--shortstat' ]
+            result = subprocess.run(
+                short_stat_command, capture_output=True, text=True
+            )
+            raw_short_stat = result.stdout
+            short_stat_out = raw_short_stat.strip()
+
+    
+    if short_stat_out is not None:
+        # pull out the numbers via regex
+        search = re.findall('[0-9]* file', short_stat_out)
+        if search is not None:
+            changes['files_changed'] = int(search[0].split(' ')[0])
+
+        search = re.findall('[0-9]* insertion', short_stat_out)
+        if search is not None:
+            changes['insertions'] = int(search[0].split(' ')[0])
+
+        search = re.findall('[0-9]* deletion', short_stat_out)
+        if search is not None:
+            if len(search) > 0:
+                changes['deletions'] = int(search[0].split(' ')[0])
+
+    
+    # figure out the unique contributors each week
+    for sha in commit_shas:
+        show_command = [ "git", "show", "-s", sha ]
+        result = subprocess.run(
+            show_command, capture_output=True, text=True
+        )
+        author_str = re.findall('Author: [a-zA-Z0-9-è ]* <[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+>', result.stdout)
+        author_tokens = author_str[0].split(' ')
+        author = " ".join(author_tokens[1:])
+        changes['contributors'].add(author)
+        changes['contributions'].append(author)
+        
+
+    # lets see it then
+    print(changes)
+
+    # hack to get rid of the gcc-merge
+    if changes['files_changed'] == 23432:
+        change_list.append(change_list[-1])
+    else:
+        change_list.append(changes)
+
+
+unique_contributors = set()
+for i in change_list:
+    for y in i['contributors']:
+        unique_contributors.add(y)
+
+# calculate average lines added and removed per week
+total_ins_lines = sum(map(lambda i: i['insertions'], change_list))
+avg_ins_lines_per_week = total_ins_lines / float(len(change_list))
+
+total_del_lines = sum(map(lambda i: i['deletions'], change_list))
+avg_del_lines_per_week = total_del_lines / float(len(change_list))
+
+print("average lines added per week:", avg_ins_lines_per_week)
+print("average lines deleted per week:", avg_del_lines_per_week)
+
+# find number of contributions per unique_contributor
+num_contribs = {}
+for i in unique_contributors:
+    num_contribs[i] = 0
+    for change in change_list:
+        for y in change['contributions']:
+            if y == i:
+                num_contribs[i] = num_contribs[i] + 1
+
+
+contribs = []
+for i in num_contribs:
+    contribs.append((i, num_contribs[i]))
+
+contribs.sort(key=lambda i: i[1], reverse=True)
+for i in contribs:
+    print(i[0], i[1])
+    
+                
+# graph the change_list
+weeks = list(map(lambda i: i, range(number_of_weeks)))
+insertions = list(map(lambda i: i['insertions'], change_list))
+deletions = list(map(lambda i: i['deletions'], change_list))
+files_changed = list(map(lambda i: i['files_changed'], change_list))
+num_contributors = list(map(lambda i: len(i['contributors']), change_list))
+
+weeks.reverse()
+insertions.reverse()
+deletions.reverse()
+files_changed.reverse()
+num_contributors.reverse()
+
+fix, axs = plt.subplots(2)
+
+axs[0].set_title("number of lines added + removed")
+axs[0].plot(weeks, insertions)
+axs[0].plot(weeks, deletions)
+# plt.plot(weeks, files_changed)
+
+axs[1].set_title("number of contributors")
+axs[1].plot(weeks, num_contributors)
+
+plt.show()