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revision.py
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revision.py
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# Copyright (C) 2017-2022 The Software Heritage developers
# See the AUTHORS file at the top-level directory of this distribution
# License: GNU Affero General Public License version 3, or any later version
# See top-level LICENSE file for more information
import hashlib
import json
import textwrap
from typing import Any, Dict, List, Optional
from django.http import HttpRequest, HttpResponse, JsonResponse
from django.shortcuts import render
from django.utils.safestring import mark_safe
from swh.model.hashutil import hash_to_bytes
from swh.model.swhids import CoreSWHID, ObjectType
from swh.web.browse.browseurls import browse_route
from swh.web.browse.snapshot_context import get_snapshot_context
from swh.web.browse.utils import (
content_display_max_size,
format_log_entries,
gen_link,
gen_person_mail_link,
gen_revision_url,
get_directory_entries,
get_readme_to_display,
get_revision_log_url,
prepare_content_for_display,
request_content,
)
from swh.web.utils import (
archive,
format_utc_iso_date,
gen_path_info,
reverse,
swh_object_icons,
)
from swh.web.utils.exc import NotFoundExc, http_status_code_message
from swh.web.utils.identifiers import get_swhids_info
from swh.web.utils.typing import RevisionMetadata, SnapshotContext, SWHObjectInfo
def _gen_content_url(
revision: Dict[str, Any],
query_string: str,
path: str,
snapshot_context: Optional[SnapshotContext],
) -> str:
if snapshot_context:
query_params = snapshot_context["query_params"]
query_params["path"] = path
query_params["revision"] = revision["id"]
content_url = reverse("browse-origin-content", query_params=query_params)
else:
content_path = "%s/%s" % (revision["directory"], path)
content_url = reverse(
"browse-content",
url_args={"query_string": query_string},
query_params={"path": content_path},
)
return content_url
def _gen_diff_link(idx: int, diff_anchor: str, link_text: str) -> str:
if idx < _max_displayed_file_diffs:
return gen_link(diff_anchor, link_text)
else:
return link_text
# TODO: put in conf
_max_displayed_file_diffs = 1000
def _gen_revision_changes_list(
revision: Dict[str, Any],
changes: List[Dict[str, Any]],
snapshot_context: Optional[SnapshotContext],
) -> str:
"""
Returns a HTML string describing the file changes
introduced in a revision.
As this string will be displayed in the browse revision view,
links to adequate file diffs are also generated.
Args:
revision (str): hexadecimal representation of a revision identifier
changes (list): list of file changes in the revision
snapshot_context (dict): optional origin context used to reverse
the content urls
Returns:
A string to insert in a revision HTML view.
"""
changes_msg = []
for i, change in enumerate(changes):
hasher = hashlib.sha1()
from_query_string = ""
to_query_string = ""
diff_id = "diff-"
if change["from"]:
from_query_string = "sha1_git:" + change["from"]["target"]
diff_id += change["from"]["target"] + "-" + change["from_path"]
diff_id += "-"
if change["to"]:
to_query_string = "sha1_git:" + change["to"]["target"]
diff_id += change["to"]["target"] + change["to_path"]
change["path"] = change["to_path"] or change["from_path"]
url_args = {
"from_query_string": from_query_string,
"to_query_string": to_query_string,
}
query_params = {"path": change["path"]}
change["diff_url"] = reverse(
"diff-contents", url_args=url_args, query_params=query_params
)
hasher.update(diff_id.encode("utf-8"))
diff_id = hasher.hexdigest()
change["id"] = diff_id
diff_link = "#diff_" + diff_id
if change["type"] == "modify":
change["content_url"] = _gen_content_url(
revision, to_query_string, change["to_path"], snapshot_context
)
changes_msg.append(
"modified: %s" % _gen_diff_link(i, diff_link, change["to_path"])
)
elif change["type"] == "insert":
change["content_url"] = _gen_content_url(
revision, to_query_string, change["to_path"], snapshot_context
)
changes_msg.append(
"new file: %s" % _gen_diff_link(i, diff_link, change["to_path"])
)
elif change["type"] == "delete":
parent = archive.lookup_revision(revision["parents"][0])
change["content_url"] = _gen_content_url(
parent, from_query_string, change["from_path"], snapshot_context
)
changes_msg.append(
"deleted: %s" % _gen_diff_link(i, diff_link, change["from_path"])
)
elif change["type"] == "rename":
change["content_url"] = _gen_content_url(
revision, to_query_string, change["to_path"], snapshot_context
)
link_text = change["from_path"] + " &rarr; " + change["to_path"]
changes_msg.append(
"renamed: %s" % _gen_diff_link(i, diff_link, link_text)
)
if not changes:
changes_msg.append("No changes")
return mark_safe("\n".join(changes_msg))
@browse_route(
r"revision/(?P<sha1_git>[0-9a-f]+)/diff/",
view_name="diff-revision",
checksum_args=["sha1_git"],
)
def _revision_diff(request: HttpRequest, sha1_git: str) -> HttpResponse:
"""
Browse internal endpoint to compute revision diff
"""
revision = archive.lookup_revision(sha1_git)
snapshot_context = None
origin_url = request.GET.get("origin_url", None)
if not origin_url:
origin_url = request.GET.get("origin", None)
timestamp = request.GET.get("timestamp", None)
visit_id_str = request.GET.get("visit_id", None)
visit_id = int(visit_id_str) if visit_id_str is not None else None
if origin_url:
snapshot_context = get_snapshot_context(
origin_url=origin_url, timestamp=timestamp, visit_id=visit_id
)
changes = archive.diff_revision(sha1_git)
changes_msg = _gen_revision_changes_list(revision, changes, snapshot_context)
diff_data = {
"total_nb_changes": len(changes),
"changes": changes[:_max_displayed_file_diffs],
"changes_msg": changes_msg,
}
return JsonResponse(diff_data)
NB_LOG_ENTRIES = 100
@browse_route(
r"revision/(?P<sha1_git>[0-9a-f]+)/log/",
view_name="browse-revision-log",
checksum_args=["sha1_git"],
)
def revision_log_browse(request: HttpRequest, sha1_git: str) -> HttpResponse:
"""
Django view that produces an HTML display of the history
log for a revision identified by its id.
The url that points to it is :http:get:`/browse/revision/(sha1_git)/log/`
"""
origin_url = request.GET.get("origin_url")
snapshot_id = request.GET.get("snapshot")
snapshot_context = None
if origin_url or snapshot_id:
visit_id = int(request.GET.get("visit_id", 0))
snapshot_context = get_snapshot_context(
snapshot_id=snapshot_id,
origin_url=origin_url,
timestamp=request.GET.get("timestamp"),
visit_id=visit_id or None,
branch_name=request.GET.get("branch"),
release_name=request.GET.get("release"),
revision_id=sha1_git,
)
per_page = int(request.GET.get("per_page", NB_LOG_ENTRIES))
offset = int(request.GET.get("offset", 0))
revs_ordering = request.GET.get("revs_ordering", "committer_date")
session_key = "rev_%s_log_ordering_%s" % (sha1_git, revs_ordering)
rev_log_session = request.session.get(session_key, None)
rev_log = []
revs_walker_state = None
if rev_log_session:
rev_log = rev_log_session["rev_log"]
revs_walker_state = rev_log_session["revs_walker_state"]
if len(rev_log) < offset + per_page:
revs_walker = archive.get_revisions_walker(
revs_ordering,
sha1_git,
max_revs=offset + per_page + 1,
state=revs_walker_state,
)
rev_log += [rev["id"] for rev in revs_walker]
revs_walker_state = revs_walker.export_state()
revs = rev_log[offset : offset + per_page]
revision_log = archive.lookup_revision_multiple(revs)
request.session[session_key] = {
"rev_log": rev_log,
"revs_walker_state": revs_walker_state,
}
revs_ordering = request.GET.get("revs_ordering", "")
prev_log_url = None
if len(rev_log) > offset + per_page:
prev_log_url = reverse(
"browse-revision-log",
url_args={"sha1_git": sha1_git},
query_params={
"per_page": str(per_page),
"offset": str(offset + per_page),
"revs_ordering": revs_ordering or None,
"origin_url": origin_url,
"snapshot": snapshot_id,
},
)
next_log_url = None
if offset != 0:
next_log_url = reverse(
"browse-revision-log",
url_args={"sha1_git": sha1_git},
query_params={
"per_page": str(per_page),
"offset": str(offset - per_page),
"revs_ordering": revs_ordering or None,
"origin_url": origin_url,
"snapshot": snapshot_id,
},
)
revision_log_data = format_log_entries(revision_log, per_page, snapshot_context)
swh_rev_id = str(
CoreSWHID(object_type=ObjectType.REVISION, object_id=hash_to_bytes(sha1_git))
)
return render(
request,
"browse-revision-log.html",
{
"heading": "Revision history",
"swh_object_id": swh_rev_id,
"swh_object_name": "Revisions history",
"swh_object_metadata": None,
"revision_log": revision_log_data,
"revs_ordering": revs_ordering,
"next_log_url": next_log_url,
"prev_log_url": prev_log_url,
"breadcrumbs": None,
"top_right_link": None,
"snapshot_context": snapshot_context,
"vault_cooking": None,
"show_actions": True,
"swhids_info": None,
},
)
@browse_route(
r"revision/(?P<sha1_git>[0-9a-f]+)/",
view_name="browse-revision",
checksum_args=["sha1_git"],
)
def revision_browse(request: HttpRequest, sha1_git: str) -> HttpResponse:
"""
Django view that produces an HTML display of a revision
identified by its id.
The url that points to it is :http:get:`/browse/revision/(sha1_git)/`.
"""
revision = archive.lookup_revision(sha1_git)
origin_info = None
snapshot_context = None
origin_url = request.GET.get("origin_url")
if not origin_url:
origin_url = request.GET.get("origin")
timestamp = request.GET.get("timestamp")
visit_id = int(request.GET.get("visit_id", 0))
snapshot_id = request.GET.get("snapshot_id")
if not snapshot_id:
snapshot_id = request.GET.get("snapshot")
path = request.GET.get("path")
dir_id = None
dirs, files = [], []
content_data = {}
if origin_url:
try:
snapshot_context = get_snapshot_context(
snapshot_id=snapshot_id,
origin_url=origin_url,
timestamp=timestamp,
visit_id=visit_id or None,
branch_name=request.GET.get("branch"),
release_name=request.GET.get("release"),
revision_id=sha1_git,
path=path,
)
except NotFoundExc as e:
raw_rev_url = reverse("browse-revision", url_args={"sha1_git": sha1_git})
error_message = (
"The Software Heritage archive has a revision "
"with the hash you provided but the origin "
"mentioned in your request appears broken: %s. "
"Please check the URL and try again.\n\n"
"Nevertheless, you can still browse the revision "
"without origin information: %s"
% (gen_link(origin_url), gen_link(raw_rev_url))
)
if str(e).startswith("Origin"):
raise NotFoundExc(error_message)
else:
raise e
origin_info = snapshot_context["origin_info"]
snapshot_id = snapshot_context["snapshot_id"]
elif snapshot_id:
snapshot_context = get_snapshot_context(snapshot_id)
error_info: Dict[str, Any] = {"status_code": 200, "description": None}
if path:
try:
file_info = archive.lookup_directory_with_path(revision["directory"], path)
if file_info["type"] == "dir":
dir_id = file_info["target"]
else:
query_string = "sha1_git:" + file_info["target"]
content_data = request_content(query_string)
except NotFoundExc as e:
error_info["status_code"] = 404
error_info["description"] = f"NotFoundExc: {str(e)}"
else:
dir_id = revision["directory"]
if dir_id:
path = "" if path is None else (path + "/")
dirs, files = get_directory_entries(dir_id)
revision_metadata = RevisionMetadata(
object_type=ObjectType.REVISION,
object_id=sha1_git,
revision=sha1_git,
author=revision["author"]["fullname"] if revision["author"] else "None",
author_url=gen_person_mail_link(revision["author"])
if revision["author"]
else "None",
committer=revision["committer"]["fullname"]
if revision["committer"]
else "None",
committer_url=gen_person_mail_link(revision["committer"])
if revision["committer"]
else "None",
committer_date=format_utc_iso_date(revision["committer_date"]),
date=format_utc_iso_date(revision["date"]),
directory=revision["directory"],
merge=revision["merge"],
metadata=json.dumps(
revision["metadata"], sort_keys=True, indent=4, separators=(",", ": ")
),
parents=revision["parents"],
synthetic=revision["synthetic"],
type=revision["type"],
snapshot=snapshot_id,
origin_url=origin_url,
)
message_lines = ["None"]
if revision["message"]:
message_lines = revision["message"].split("\n")
parents = []
for p in revision["parents"]:
parent_url = gen_revision_url(p, snapshot_context)
parents.append({"id": p, "url": parent_url})
path_info = gen_path_info(path)
query_params = snapshot_context["query_params"] if snapshot_context else {}
breadcrumbs = []
breadcrumbs.append(
{
"name": revision["directory"][:7],
"url": reverse(
"browse-revision",
url_args={"sha1_git": sha1_git},
query_params=query_params,
),
}
)
for pi in path_info:
query_params["path"] = pi["path"]
breadcrumbs.append(
{
"name": pi["name"],
"url": reverse(
"browse-revision",
url_args={"sha1_git": sha1_git},
query_params=query_params,
),
}
)
vault_cooking = {
"directory_context": False,
"directory_swhid": None,
"revision_context": True,
"revision_swhid": f"swh:1:rev:{sha1_git}",
}
swh_objects = [SWHObjectInfo(object_type=ObjectType.REVISION, object_id=sha1_git)]
content = None
content_size = None
filename = None
mimetype = None
language = None
readme_name = None
readme_url = None
readme_html = None
readmes = {}
extra_context = dict(revision_metadata)
extra_context["path"] = f"/{path}" if path else None
if content_data:
breadcrumbs[-1]["url"] = None
content_size = content_data["length"]
mimetype = content_data["mimetype"]
if content_data["raw_data"]:
content_display_data = prepare_content_for_display(
content_data["raw_data"], content_data["mimetype"], path
)
content = content_display_data["content_data"]
language = content_display_data["language"]
mimetype = content_display_data["mimetype"]
if path:
filename = path_info[-1]["name"]
query_params["filename"] = filename
filepath = "/".join(pi["name"] for pi in path_info[:-1])
extra_context["path"] = f"/{filepath}/" if filepath else "/"
extra_context["filename"] = filename
top_right_link = {
"url": reverse(
"browse-content-raw",
url_args={"query_string": query_string},
query_params={"filename": filename},
),
"icon": swh_object_icons["content"],
"text": "Raw File",
}
swh_objects.append(
SWHObjectInfo(object_type=ObjectType.CONTENT, object_id=file_info["target"])
)
else:
for d in dirs:
if d["type"] == "rev":
d["url"] = reverse(
"browse-revision", url_args={"sha1_git": d["target"]}
)
else:
query_params["path"] = path + d["name"]
d["url"] = reverse(
"browse-revision",
url_args={"sha1_git": sha1_git},
query_params=query_params,
)
for f in files:
query_params["path"] = path + f["name"]
f["url"] = reverse(
"browse-revision",
url_args={"sha1_git": sha1_git},
query_params=query_params,
)
if f["name"].lower().startswith("readme"):
readmes[f["name"]] = f["checksums"]["sha1"]
readme_name, readme_url, readme_html = get_readme_to_display(readmes)
top_right_link = {
"url": get_revision_log_url(sha1_git, snapshot_context),
"icon": swh_object_icons["revisions history"],
"text": "History",
}
vault_cooking["directory_context"] = True
vault_cooking["directory_swhid"] = f"swh:1:dir:{dir_id}"
swh_objects.append(
SWHObjectInfo(object_type=ObjectType.DIRECTORY, object_id=dir_id)
)
query_params.pop("path", None)
diff_revision_url = reverse(
"diff-revision",
url_args={"sha1_git": sha1_git},
query_params=query_params,
)
if snapshot_id:
swh_objects.append(
SWHObjectInfo(object_type=ObjectType.SNAPSHOT, object_id=snapshot_id)
)
swhids_info = get_swhids_info(swh_objects, snapshot_context, extra_context)
heading = "Revision - %s - %s" % (
sha1_git[:7],
textwrap.shorten(message_lines[0], width=70),
)
if snapshot_context:
context_found = "snapshot: %s" % snapshot_context["snapshot_id"]
if origin_info:
context_found = "origin: %s" % origin_info["url"]
heading += " - %s" % context_found
return render(
request,
"browse-revision.html",
{
"heading": heading,
"swh_object_id": swhids_info[0]["swhid"],
"swh_object_name": "Revision",
"swh_object_metadata": revision_metadata,
"message_header": message_lines[0],
"message_body": "\n".join(message_lines[1:]),
"parents": parents,
"snapshot_context": snapshot_context,
"dirs": dirs,
"files": files,
"content": content,
"content_size": content_size,
"max_content_size": content_display_max_size,
"filename": filename,
"encoding": content_data.get("encoding"),
"mimetype": mimetype,
"language": language,
"readme_name": readme_name,
"readme_url": readme_url,
"readme_html": readme_html,
"breadcrumbs": breadcrumbs,
"top_right_link": top_right_link,
"vault_cooking": vault_cooking,
"diff_revision_url": diff_revision_url,
"show_actions": True,
"swhids_info": swhids_info,
"error_code": error_info["status_code"],
"error_message": http_status_code_message.get(error_info["status_code"]),
"error_description": error_info["description"],
},
status=error_info["status_code"],
)

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