aboutsummaryrefslogtreecommitdiffstats
path: root/acispy/manifest.py
blob: dc83c76ad2f9388a498f4de6f78a3aeacc4c11cf (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
# Copyright (c) 2017 Weitian LI <liweitianux@live.com>
# MIT license
#
# Weitian LI
# 2017-02-11

"""
Manage the observation manifest in YAML format.

NOTE
----
Use `ruamel.yaml`_ instead of `PyYAML`_ to preserve the comments
and other structures in the YAML file.

.. _`ruamel.yaml`: https://bitbucket.org/ruamel/yaml
.. _`PyYAML`: http://pyyaml.org/
"""

import os
import sys
import argparse
import logging
from collections import OrderedDict

import ruamel.yaml


logger = logging.getLogger(__name__)


class Manifest:
    """
    Manage the observational products manifest.
    """
    def __init__(self, filepath):
        self.filepath = os.path.abspath(filepath)
        self.manifest = ruamel.yaml.load(
            open(filepath), Loader=ruamel.yaml.RoundTripLoader)
        if self.manifest is None:
            self.manifest = ruamel.yaml.comments.CommentedMap()

    def dump(self):
        return ruamel.yaml.dump(self.manifest,
                                Dumper=ruamel.yaml.RoundTripDumper)

    def save(self):
        with open(self.filepath, "w") as f:
            f.write(self.dump())

    def show(self):
        print(self.dump())

    def has(self, key):
        return True if key in self.manifest else False

    def get(self, key):
        """
        Get the value of the specified item in the manifest.

        Parameters
        ----------
        key : str
            The key of the item to be requested.

        Raises
        ------
        KeyError :
            If the specified item doesn't exist.
        """
        if self.has(key):
            return self.manifest[key]
        else:
            raise KeyError("manifest doesn't have item: '%s'" % key)

    def gets(self, keys, default=None, splitlist=False):
        """
        Get the value of the specified item in the manifest.

        Parameters
        ----------
        keys : list[str]
            A list of keys specifying the items to be requested.
        default : optional
            The default value to return if the item not exists.
        splitlist : bool, optional
            Split the item value if it is a list, making it is easier
            to export as CSV format.

        Returns
        -------
        data : `~OrderedDict`
            Ordered dictionary containing the requested items.

        Returns
        -------
        """
        data = OrderedDict([
            (key, self.manifest.get(key, default)) for key in keys
        ])
        if splitlist:
            ds = OrderedDict()
            for k, v in data.items():
                if isinstance(v, list):
                    for i, vi in enumerate(v):
                        ki = "{0}[{1}]".format(k, i)
                        ds[ki] = vi
                else:
                    ds[k] = v
            data = ds
        return data

    def getpath(self, key, relative=False, sep=None):
        """
        Get the absolute path to the specified item by joining
        with the location of this manifest file.

        Parameters
        ----------
        key : str
            Key of the file item
        relative : bool, optional
            Whether return the file path(s) as relative path w.r.t.
            the current working directory?
        sep : str, optional
            If not ``None``, join the multiple file paths with the
            specified separator, instead of returning a list of paths.
        """
        value = self.get(key)
        cwd = os.getcwd()
        if isinstance(value, list):
            path = [os.path.join(os.path.dirname(self.filepath), f)
                    for f in value]
            if relative:
                path = [os.path.relpath(p, start=cwd) for p in path]
            if sep is not None:
                path = sep.join(path)
        else:
            path = os.path.join(os.path.dirname(self.filepath), value)
            if relative:
                path = os.path.relpath(path, start=cwd)
        return path

    def set(self, key, value):
        """
        Set the value of the specified item in the manifest.
        (Will add a new item or update an existing item.)
        """
        self.manifest[key] = self.parse_value(value)
        self.save()
        logger.info("Set item '{0}': {1}".format(key, self.get(key)))

    def setpath(self, key, path):
        """
        Get the relative path of the given file w.r.t. this manifest file,
        and set it to be the value of the specified item.
        (Will add a new item or update an existing item.)
        """
        dirname = os.path.dirname(self.filepath)
        if isinstance(path, list):
            abspath = [os.path.abspath(p) for p in path]
            relpath = [os.path.relpath(p, start=dirname) for p in abspath]
            if len(relpath) == 1:
                relpath = relpath[0]
        else:
            abspath = os.path.abspath(path)
            relpath = os.path.relpath(abspath, start=dirname)
        self.manifest[key] = relpath
        self.save()
        logger.info("Set file item '{0}': {1}".format(key, self.get(key)))

    def add(self, key, value):
        """
        Add the specified new item in the manifest.

        If the specified item already exists, raise a ``KeyError``.
        """
        if self.has(key):
            raise KeyError("manifest already has item: '%s'" % key)
        else:
            self.set(key, value)

    def update(self, key, value):
        """
        Update the specified existing item in the manifest.

        If the specified item doesn't exist, raise a ``KeyError``.
        """
        if self.has(key):
            self.set(key, value)
        else:
            raise KeyError("manifest doesn't have item: '%s'" % key)

    def delete(self, key):
        """
        Delete the specified item from the manifest.
        """
        if self.has(key):
            del self.manifest[key]
            self.save()
            logger.info("Deleted item: '%s'" % key)
        else:
            logger.warning("manifest does not have item '%s'" % key)

    def rename(self, oldkey, newkey):
        """
        Rename the specified key in the manifest.

        If the specified old key doesn't exist, or the new key already
        exists, the error ``KeyError`` is raised.
        """
        if oldkey not in self.manifest:
            raise KeyError("manifest doesn't have item: '%s'" % oldkey)
        if newkey in self.manifest:
            raise KeyError("manifest already has item: '%s'" % newkey)
        # Add item with the new key
        self.manifest[newkey] = self.manifest[oldkey]
        # Delete old item
        del self.manifest[oldkey]
        self.save()
        logger.info("Renamed item key: '%s' -> '%s'" % (oldkey, newkey))

    @classmethod
    def parse_value(self, value):
        """
        Parse the given (list of) value(s) from string.

        If the value list only has length of 1, then just return
        the only element without list enclosure.
        """
        if isinstance(value, list):
            pv = [self.parse_value_single(v) for v in value]
            if len(pv) == 1:
                return pv[0]
            else:
                return pv
        else:
            return self.parse_value_single(value)

    @staticmethod
    def parse_value_single(value):
        """
        Try to parse the given value from string to integer, float, boolean
        or string.

        If the input value is not string, then just ignore the parse.
        """
        if not isinstance(value, str):
            return value

        try:
            v = int(value)
        except ValueError:
            try:
                v = float(value)
            except ValueError:
                # string/boolean
                if value.lower() in ["true", "yes"]:
                    v = True
                elif value.lower() in ["false", "no"]:
                    v = False
                else:
                    v = value  # string
        return v


def find_manifest(filename="manifest.yaml", startdir=os.getcwd()):
    """
    Find the specified manifest file in current directory and
    the upper-level directories.

    Parameters
    ----------
    filename : str, optional
        Filename of the manifest file (default: ``manifest.yaml``)

    Returns
    -------
    filepath : str
        Absolute path to the manifest file if found.

    Raises
    ------
    FileNotFoundError :
        Cannot found the specified manifest
    """
    dirname = startdir
    filepath = os.path.join(dirname, filename)
    while dirname != "/":
        if os.path.exists(filepath):
            return filepath
        # go upper by one level
        dirname = os.path.dirname(dirname)
        filepath = os.path.join(dirname, filename)
    # not found
    raise FileNotFoundError("cannot found manifest file: %s" % filename)


def get_manifest(filename="manifest.yaml"):
    """
    Find the manifest file and return the Manifest instance of it.

    Parameters
    ----------
    filename : str, optional
        Filename of the manifest file (default: ``manifest.yaml``)

    Returns
    -------
    manifest : `~Manifest`
        Manifest instance of the found manifest file.
    """
    return Manifest(find_manifest(filename))


# COMMAND-LINE INTERFACE ----------------------------------------------------

def cmd_show(args, manifest):
    """
    Default sub-command "show": Show manifest contents.
    """
    manifest.show()


def cmd_get(args, manifest):
    """
    Sub-command "get": Get the value of an item in the manifest.
    """
    if not args.brief:
        print("%s:" % args.key, end=" ")
    value = manifest.get(args.key)
    if isinstance(value, list):
        if args.field:
            print(value[args.field-1])
        else:
            vs = [str(v) for v in value]
            print(args.separator.join(vs))
    else:
        print(value)


def cmd_getpath(args, manifest):
    """
    Sub-command "getpath": Get the absolute path to the specified file
    item in the manifest.
    """
    if not args.brief:
        print("%s:" % args.key, end=" ")
    path = manifest.getpath(args.key, relative=args.relative,
                            sep=args.separator)
    print(path)


def cmd_set(args, manifest):
    """
    Sub-command "set": Set the value of an item in the manifest.
    (Will add a new item or update an existing item.)
    """
    manifest.set(args.key, args.value)


def cmd_setpath(args, manifest):
    """
    Sub-command "setpath": Set the specified file item in the manifest
    to be the relative path of the given file w.r.t. the manifest file.
    """
    manifest.setpath(args.key, args.value)


def cmd_add(args, manifest):
    """
    Sub-command "add": Add a new item to the manifest.
    """
    manifest.add(args.key, args.value)


def cmd_update(args, manifest):
    """
    Sub-command "update": Update the value of an existing item in the
    manifest.
    """
    manifest.update(args.key, args.value)


def cmd_delete(args, manifest):
    """
    Sub-command "delete": Delete an item from the manifest.
    """
    manifest.delete(args.key)


def cmd_rename(args, manifest):
    """
    Sub-command "rename": Rename an item in the manifest.
    """
    manifest.rename(args.key, args.newkey)


def main(description="Manage the observation manifest (YAML format)",
         default_file="manifest.yaml"):
    parser = argparse.ArgumentParser(description=description)
    parser.add_argument("-F", "--file", dest="file", default=default_file,
                        help="Manifest file (default: %s)" % default_file)
    parser.add_argument("-b", "--brief", dest="brief",
                        action="store_true", help="Be brief")
    parser.add_argument("-C", "--directory", dest="directory", default=".",
                        help="From where to find the manifest file")
    parser.add_argument("-s", "--separator", dest="separator", default=" ",
                        help="Separator to join output list values " +
                        "(default: whitespace)")
    subparsers = parser.add_subparsers(dest="cmd_name",
                                       title="sub-commands",
                                       help="additional help")
    # sub-command: show
    parser_show = subparsers.add_parser("show", help="Show manifest contents")
    parser_show.set_defaults(func=cmd_show)
    # sub-command: get
    parser_get = subparsers.add_parser("get", help="Get an item from manifest")
    parser_get.add_argument("-f", "--field", dest="field", type=int,
                            help="which field to get (default: all fields)")
    parser_get.add_argument("key", help="key of the item")
    parser_get.set_defaults(func=cmd_get)
    # sub-command: getpath
    parser_getpath = subparsers.add_parser(
        "getpath", help="Get the path to a file item from manifest")
    parser_getpath.add_argument("-r", "--relative", dest="relative",
                                action="store_true",
                                help="Return relative path w.r.t. current " +
                                "working directory instead of absolute path")
    parser_getpath.add_argument("key", help="key of the file item")
    parser_getpath.set_defaults(func=cmd_getpath)
    # sub-command: set
    parser_set = subparsers.add_parser(
        "set", help="Set (add/update) an item in manifest")
    parser_set.add_argument("key", help="key of the item")
    parser_set.add_argument("value", nargs="+",
                            help="value of the item")
    parser_set.set_defaults(func=cmd_set)
    # sub-command: setpath
    parser_setpath = subparsers.add_parser(
        "setpath", help="Set a file item using relative path of given files")
    parser_setpath.add_argument("key", help="key of the file item")
    parser_setpath.add_argument("value", nargs="+",
                                help="paths to the files")
    parser_setpath.set_defaults(func=cmd_setpath)
    # sub-command: add
    parser_add = subparsers.add_parser(
        "add", help="Add a new item to manifest")
    parser_add.add_argument("key", help="key of the item")
    parser_add.add_argument("value", nargs="+",
                            help="value of the item")
    parser_add.set_defaults(func=cmd_add)
    # sub-command: update
    parser_update = subparsers.add_parser(
        "update", help="Update an existing item in manifest")
    parser_update.add_argument("key", help="key of the item")
    parser_update.add_argument("value", nargs="+",
                               help="new value of the item")
    parser_update.set_defaults(func=cmd_update)
    # sub-command: delete
    parser_delete = subparsers.add_parser(
        "delete", help="Delete an item from the manifest")
    parser_delete.add_argument("key", help="key of the item")
    parser_delete.set_defaults(func=cmd_delete)
    # sub-command: rename
    parser_rename = subparsers.add_parser(
        "rename", help="Rename an item in the manifest")
    parser_rename.add_argument("key", help="old item key")
    parser_rename.add_argument("newkey", help="new item key")
    parser_rename.set_defaults(func=cmd_rename)
    #
    args = parser.parse_args()

    if os.path.exists(args.file):
        manifest_file = args.file
    else:
        manifest_file = find_manifest(
            args.file, startdir=os.path.abspath(args.directory))

    manifest = Manifest(manifest_file)

    if args.cmd_name:
        # Dispatch sub-commands to call its specified function
        args.func(args, manifest)
    else:
        cmd_show(None, manifest)