forked from expo/troggle
245 lines
11 KiB
Python
245 lines
11 KiB
Python
import datetime
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import logging
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import os
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import random
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import re
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import resource
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import string
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import subprocess
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from decimal import Decimal, getcontext
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from pathlib import Path
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from urllib.parse import urljoin
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getcontext().prec=2 #use 2 significant figures for decimal calculations
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from django.conf import settings
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from django.contrib import admin
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from django.contrib.auth.models import User
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from django.contrib.contenttypes.models import ContentType
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from django.db import models
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from django.template import Context, loader
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from django.urls import reverse
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import settings
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'''This file declares TROG a globally visible object for caches.
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TROG is a dictionary holding globally visible indexes and cache functions.
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It is a Global Object, see https://python-patterns.guide/python/module-globals/
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troggle.utils.TROG
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chaosmonkey(n) - used by survex import to regenerate some .3d files
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save_carefully() - core function that saves troggle objects in the database
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various git add/commit functions that need refactoring together
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'''
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TROG = {
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'pagecache' : {
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'expedition' : {}
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},
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'issues' : {
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'logdataissues' : {}
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},
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'caves' : {
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'gcavelookup' : {},
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'gcavecount' : {}
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}
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}
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# This is module-level executable. This is a Bad Thing. Especially when it touches the file system.
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try:
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logging.basicConfig(level=logging.DEBUG,
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filename=settings.LOGFILE,
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filemode='w')
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except:
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# Opening of file for writing is going to fail currently, so decide it doesn't matter for now
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pass
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def get_process_memory():
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usage=resource.getrusage(resource.RUSAGE_SELF)
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return usage[2]/1024.0
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def chaosmonkey(n):
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'''returns True once every n calls - randomly'''
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if random.randrange(0,n) != 0:
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return False
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# print("CHAOS strikes !", file=sys.stderr)
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return True
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def only_commit(fname, message):
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'''Only used to commit a survex file edited and saved in view/survex.py
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'''
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git = settings.GIT
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cwd = fname.parent
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filename = fname.name
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#print(f'{fname=} ')
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try:
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cp_add = subprocess.run([git, "add", filename], cwd=cwd, capture_output=True, text=True)
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if cp_add.returncode != 0:
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msgdata = f'Ask a nerd to fix this problem in only_commit().\n--{cp_add.stderr}\n--{cp_add.stdout}\n--return code:{str(cp_add.returncode)}'
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raise WriteAndCommitError(f'CANNOT git ADD on server for this file {filename}. Edits saved but not added to git.\n\n' + msgdata)
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cp_commit = subprocess.run([git, "commit", "-m", message], cwd=cwd, capture_output=True, text=True)
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# This produces return code = 1 if it commits OK, but when the local repo still needs to be pushed to origin/loser
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# which will be the case when running a test troggle system on a development machine
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devok_text ='''On branch master
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Your branch is ahead of 'origin/master' by 1 commit.
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(use "git push" to publish your local commits)
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nothing to commit, working tree clean
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'''
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if cp_commit.returncode == 1 and cp_commit.stdout == devok_text:
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pass
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else:
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if cp_commit.returncode != 0 and not cp_commit.stdout.strip().endswith('nothing to commit, working tree clean'):
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msgdata = f'--Ask a nerd to fix this problem in only_commit().\n--{cp_commit.stderr}\n--"{cp_commit.stdout}"\n--return code:{str(cp_commit.returncode)}'
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print(msgdata)
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raise WriteAndCommitError(f'Error code with git on server for this file {filename}. Edits saved, added to git, but NOT committed.\n\n' + msgdata)
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except subprocess.SubprocessError:
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raise WriteAndCommitError(f'CANNOT git COMMIT on server for this file {filename}. Subprocess error. Edits not saved.\nAsk a nerd to fix this.')
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def write_and_commit(files, message):
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"""Writes the content to the filepath and adds and commits the file to git. If this fails, a WriteAndCommitError is raised.
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This does not create any needed intermediate folders, which is what we do when writing survex files, so functionality here
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is duplicated in only_commit()
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These need refactoring
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"""
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git = settings.GIT
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try:
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for filepath, content, encoding in files:
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cwd = filepath.parent
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filename = filepath.name
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# GIT see also core/views/uploads.py dwgupload()
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# GIT see also core/views/expo.py editexpopage()
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if encoding:
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mode = "w"
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kwargs = {"encoding": encoding}
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else:
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mode = "wb"
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kwargs = {}
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try:
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with open(filepath, mode, **kwargs) as f:
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print(f'WRITING{cwd}---{filename} ')
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# as the wsgi process www-data, we have group write-access but are not owner, so cannot chmod.
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# os.chmod(filepath, 0o664) # set file permissions to rw-rw-r--
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f.write(content)
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except PermissionError:
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raise WriteAndCommitError(f'CANNOT save this file.\nPERMISSIONS incorrectly set on server for this file {filename}. Ask a nerd to fix this.')
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cp_diff = subprocess.run([git, "diff", filename], cwd=cwd, capture_output=True, text=True)
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if cp_diff.returncode == 0:
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cp_add = subprocess.run([git, "add", filename], cwd=cwd, capture_output=True, text=True)
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if cp_add.returncode != 0:
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msgdata = 'Ask a nerd to fix this.\n\n' + cp_add.stderr + '\n\n' + cp_add.stdout + '\n\nreturn code: ' + str(cp_add.returncode)
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raise WriteAndCommitError(f'CANNOT git on server for this file {filename}. Edits saved but not added to git.\n\n' + msgdata)
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else:
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print(f"No change {filepah}")
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cp_commit = subprocess.run([git, "commit", "-m", message], cwd=cwd, capture_output=True, text=True)
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cp_status = subprocess.run([git, "status"], cwd=cwd, capture_output=True, text=True)
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# This produces return code = 1 if it commits OK, but when the repo still needs to be pushed to origin/expoweb
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if cp_status.stdout.split("\n")[-2] != 'nothing to commit, working tree clean':
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print("FOO: ", cp_status.stdout.split("\n")[-2])
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msgdata = 'Ask a nerd to fix this.\n\n' + cp_status.stderr + '\n\n' + cp_status.stdout + '\n\nreturn code: ' + str(cp_status.returncode)
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raise WriteAndCommitError(f'Error code with git on server for this file {filename}. Edits saved, added to git, but NOT committed.\n\n' + msgdata)
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except subprocess.SubprocessError:
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raise WriteAndCommitError(f'CANNOT git on server for this file {filename}. Subprocess error. Edits not saved.\nAsk a nerd to fix this.')
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class WriteAndCommitError(Exception):
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"""Exception class for errors writing files and comitting them to git"""
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def __init__(self, message):
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self.message = message
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def __str__(self):
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return f'WriteAndCommitError: {self.message}'
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def writetrogglefile(filepath, filecontent):
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'''Commit the new saved file to git
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Callers to cave.writeDataFile() or entrance.writeDataFile() should handle the exception PermissionsError explicitly
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'''
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# GIT see also core/views/expo.py editexpopage()
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# GIT see also core/views/uploads.py dwgupload()
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# Called from core/models/caves.py Cave.writeDataFile() Entrance.writeDataFile()
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filepath = Path(filepath)
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cwd = filepath.parent
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filename = filepath.name
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git = settings.GIT
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# as the wsgi process www-data, we have group write-access but are not owner, so cannot chmod.
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# do not trap exceptions, pass them up to the view that called this function
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print(f'WRITING{cwd}---{filename} ')
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with open(filepath, "w") as f:
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f.write(filecontent)
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#os.chmod(filepath, 0o664) # set file permissions to rw-rw-r--
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sp = subprocess.run([git, "add", filename], cwd=cwd, capture_output=True, check=True, text=True)
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if sp.returncode != 0:
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out = sp.stdout
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if len(out) > 160:
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out = out[:75] + "\n <Long output curtailed>\n" + out[-75:]
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print(f'git ADD {cwd}:\n\n' + str(sp.stderr) + '\n\n' + out + '\n\nreturn code: ' + str(sp.returncode))
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sp = subprocess.run([git, "commit", "-m", f'Troggle online: cave or entrance edit -{filename}'], cwd=cwd, capture_output=True, check=True, text=True)
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if sp.returncode != 0:
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out = sp.stdout
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if len(out) > 160:
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out = out[:75] + "\n <Long output curtailed>\n" + out[-75:]
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print(f'git COMMIT {cwd}:\n\n' + str(sp.stderr) + '\n\n' + out + '\n\nreturn code: ' + str(sp.returncode))
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# not catching and re-raising any exceptions yet, inc. the stderr etc.,. We should do that.
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def save_carefully(objectType, lookupAttribs={}, nonLookupAttribs={}):
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"""Looks up instance using lookupAttribs and carries out the following:
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-if instance does not exist in DB: add instance to DB, return (new instance, True)
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-if instance exists in DB and was modified using Troggle: do nothing, return (existing instance, False)
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-if instance exists in DB and was not modified using Troggle: overwrite instance, return (instance, False)
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The checking is accomplished using Django's get_or_create and the new_since_parsing boolean field
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defined in core.models.TroggleModel.
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We are not using new_since_parsing - it is a fossil from Aaron Curtis's design in 2006. So it is always false.
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"""
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try:
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instance, created = objectType.objects.get_or_create(defaults=nonLookupAttribs, **lookupAttribs)
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except:
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print(" !! - FAIL in SAVE CAREFULLY ===================", objectType)
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print(" !! - -- objects.get_or_create()")
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print(f" !! - lookupAttribs:{lookupAttribs}\n !! - nonLookupAttribs:{nonLookupAttribs}")
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raise
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if not created and not instance.new_since_parsing:
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for k, v in list(nonLookupAttribs.items()): #overwrite the existing attributes from the logbook text (except date and title)
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setattr(instance, k, v)
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try:
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instance.save()
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except:
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print(" !! - SAVE CAREFULLY ===================", objectType)
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print(" !! - -- instance.save()")
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print(f" !! - lookupAttribs:{lookupAttribs}\n !! - nonLookupAttribs:{nonLookupAttribs}")
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raise
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try:
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msg = str(instance)
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except:
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msg = f"FAULT getting __str__ for instance with lookupattribs: {lookupAttribs}:"
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if created:
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logging.info(str(instance) + ' was just added to the database for the first time. \n')
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if not created and instance.new_since_parsing:
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logging.info(str(instance) + " has been modified using Troggle since parsing, so the current script left it as is. \n")
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if not created and not instance.new_since_parsing:
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logging.info(" instance:<"+ str(instance) + "> existed in the database unchanged since last parse. It have been overwritten.")
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return (instance, created)
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