Support some Mercurial hosts

This will need updating from the hardcoded list at some point.

pkgcrap/outdated_check.py

@@ -35,9 +35,11 @@ def repos_from_metadata(pkg):
             remotes.append(('pypi', remote[1]))
     return remotes
 
-def repo_from_egit_uri(pkg):
+def repo_from_repo_uri(pkg):
     if 'EGIT_REPO_URI' in pkg.ebuilds[0].vars:
         return ('git', pkg.ebuilds[0].vars['EGIT_REPO_URI'].replace('${PN}', pkg.name))
+    if 'EHG_REPO_URI' in pkg.ebuilds[0].vars:
+        return ('hg', pkg.ebuilds[0].vars['EHG_REPO_URI'].replace('${PN}', pkg.name))
 
 def repo_from_src_uri(pkg):
     for eb in pkg.ebuilds:
@@ -52,7 +54,7 @@ def repo_from_homepage(pkg):
 def repos_from_pkg(pkg):
     repos = []
     repos += repos_from_metadata(pkg)
-    repos.append(repo_from_egit_uri(pkg))
+    repos.append(repo_from_repo_uri(pkg))
     repos.append(repo_from_src_uri(pkg))
     repos.append(repo_from_homepage(pkg))
     return [repo for repo in repos if repo != None]
@@ -91,6 +93,28 @@ def repo_get_latest_git(uri, pkg, verbose):
         return None
     return latest
 
+def repo_get_latest_hg(uri, pkg, verbose):
+    global blacklisted_tags
+    forges = [
+        ('https://hg.sr.ht/', '/raw/'),
+    ]
+    raw_path = '/raw-file/tip/'
+    for forge in forges:
+        if uri.startswith(forge[0]):
+            raw_path = forge[1]
+    try:
+        r = urllib.request.urlopen(uri+raw_path+'.hgtags')
+    except urllib.error.HTTPError:
+        if verbose:
+            print(pkg.full_name+':', 'Invalid repo!', uri)
+        return None
+    for line in r.read().decode('utf-8').split("\n"):
+        tag = line[41:]
+        if line[:40] in blacklisted_tags or tag in blacklisted_tags:
+            continue
+        latest = tag
+    return latest
+
 def repo_get_latest_pypi(uri, pkg, verbose):
     try:
         r = urllib.request.urlopen('https://pypi.org/pypi/'+uri+'/json')
@@ -103,6 +127,8 @@ def repo_get_latest_pypi(uri, pkg, verbose):
 def repo_get_latest(repo, pkg, verbose):
     if repo[0] == 'git':
         return repo_get_latest_git(repo[1], pkg, verbose)
+    if repo[0] == 'hg':
+        return repo_get_latest_hg(repo[1], pkg, verbose)
     if repo[0] == 'pypi':
         return repo_get_latest_pypi(repo[1], pkg, verbose)
     return None