From e26ade8ebc595247ef47e7616f2abd6aa2fafb09 Mon Sep 17 00:00:00 2001 From: Dominic Ricottone Date: Mon, 22 Jun 2020 18:08:30 -0400 Subject: [PATCH] Initial commit --- .gitignore | 7 + LICENSE.md | 595 ++++++++++++++++++++++++++++++++++++++++++ Makefile | 20 ++ README.md | 63 +++++ neopaste/__main__.py | 39 +++ neopaste/cli.py | 175 +++++++++++++ neopaste/cli.toml | 24 ++ neopaste/columnar.py | 106 ++++++++ neopaste/internals.py | 61 +++++ requirements.txt | 3 + setup.py | 24 ++ 11 files changed, 1117 insertions(+) create mode 100644 .gitignore create mode 100644 LICENSE.md create mode 100644 Makefile create mode 100644 README.md create mode 100644 neopaste/__main__.py create mode 100644 neopaste/cli.py create mode 100644 neopaste/cli.toml create mode 100644 neopaste/columnar.py create mode 100644 neopaste/internals.py create mode 100644 requirements.txt create mode 100644 setup.py diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..dfb3b18 --- /dev/null +++ b/.gitignore @@ -0,0 +1,7 @@ +**/__pycache__ +**/__mypycache__ +**/*.pyc +build +dist +*.egg-info + diff --git a/LICENSE.md b/LICENSE.md new file mode 100644 index 0000000..175443c --- /dev/null +++ b/LICENSE.md @@ -0,0 +1,595 @@ +GNU General Public License +========================== + +_Version 3, 29 June 2007_ +_Copyright © 2007 Free Software Foundation, Inc. <>_ + +Everyone is permitted to copy and distribute verbatim copies of this license +document, but changing it is not allowed. + +## Preamble + +The GNU General Public License is a free, copyleft license for software and other +kinds of works. + +The licenses for most software and other practical works are designed to take away +your freedom to share and change the works. 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But this requirement does not apply if +neither you nor any third party retains the ability to install modified object code +on the User Product (for example, the work has been installed in ROM). + +The requirement to provide Installation Information does not include a requirement to +continue to provide support service, warranty, or updates for a work that has been +modified or installed by the recipient, or for the User Product in which it has been +modified or installed. Access to a network may be denied when the modification itself +materially and adversely affects the operation of the network or violates the rules +and protocols for communication across the network. + +Corresponding Source conveyed, and Installation Information provided, in accord with +this section must be in a format that is publicly documented (and with an +implementation available to the public in source code form), and must require no +special password or key for unpacking, reading or copying. + +### 7. Additional Terms + +“Additional permissions” are terms that supplement the terms of this +License by making exceptions from one or more of its conditions. Additional +permissions that are applicable to the entire Program shall be treated as though they +were included in this License, to the extent that they are valid under applicable +law. If additional permissions apply only to part of the Program, that part may be +used separately under those permissions, but the entire Program remains governed by +this License without regard to the additional permissions. + +When you convey a copy of a covered work, you may at your option remove any +additional permissions from that copy, or from any part of it. (Additional +permissions may be written to require their own removal in certain cases when you +modify the work.) You may place additional permissions on material, added by you to a +covered work, for which you have or can give appropriate copyright permission. + +Notwithstanding any other provision of this License, for material you add to a +covered work, you may (if authorized by the copyright holders of that material) +supplement the terms of this License with terms: + +* **a)** Disclaiming warranty or limiting liability differently from the terms of +sections 15 and 16 of this License; or +* **b)** Requiring preservation of specified reasonable legal notices or author +attributions in that material or in the Appropriate Legal Notices displayed by works +containing it; or +* **c)** Prohibiting misrepresentation of the origin of that material, or requiring that +modified versions of such material be marked in reasonable ways as different from the +original version; or +* **d)** Limiting the use for publicity purposes of names of licensors or authors of the +material; or +* **e)** Declining to grant rights under trademark law for use of some trade names, +trademarks, or service marks; or +* **f)** Requiring indemnification of licensors and authors of that material by anyone +who conveys the material (or modified versions of it) with contractual assumptions of +liability to the recipient, for any liability that these contractual assumptions +directly impose on those licensors and authors. + +All other non-permissive additional terms are considered “further +restrictions” within the meaning of section 10. If the Program as you received +it, or any part of it, contains a notice stating that it is governed by this License +along with a term that is a further restriction, you may remove that term. If a +license document contains a further restriction but permits relicensing or conveying +under this License, you may add to a covered work material governed by the terms of +that license document, provided that the further restriction does not survive such +relicensing or conveying. + +If you add terms to a covered work in accord with this section, you must place, in +the relevant source files, a statement of the additional terms that apply to those +files, or a notice indicating where to find the applicable terms. + +Additional terms, permissive or non-permissive, may be stated in the form of a +separately written license, or stated as exceptions; the above requirements apply +either way. + +### 8. Termination + +You may not propagate or modify a covered work except as expressly provided under +this License. Any attempt otherwise to propagate or modify it is void, and will +automatically terminate your rights under this License (including any patent licenses +granted under the third paragraph of section 11). + +However, if you cease all violation of this License, then your license from a +particular copyright holder is reinstated **(a)** provisionally, unless and until the +copyright holder explicitly and finally terminates your license, and **(b)** permanently, +if the copyright holder fails to notify you of the violation by some reasonable means +prior to 60 days after the cessation. + +Moreover, your license from a particular copyright holder is reinstated permanently +if the copyright holder notifies you of the violation by some reasonable means, this +is the first time you have received notice of violation of this License (for any +work) from that copyright holder, and you cure the violation prior to 30 days after +your receipt of the notice. + +Termination of your rights under this section does not terminate the licenses of +parties who have received copies or rights from you under this License. If your +rights have been terminated and not permanently reinstated, you do not qualify to +receive new licenses for the same material under section 10. + +### 9. Acceptance Not Required for Having Copies + +You are not required to accept this License in order to receive or run a copy of the +Program. Ancillary propagation of a covered work occurring solely as a consequence of +using peer-to-peer transmission to receive a copy likewise does not require +acceptance. However, nothing other than this License grants you permission to +propagate or modify any covered work. These actions infringe copyright if you do not +accept this License. Therefore, by modifying or propagating a covered work, you +indicate your acceptance of this License to do so. + +### 10. Automatic Licensing of Downstream Recipients + +Each time you convey a covered work, the recipient automatically receives a license +from the original licensors, to run, modify and propagate that work, subject to this +License. You are not responsible for enforcing compliance by third parties with this +License. + +An “entity transaction” is a transaction transferring control of an +organization, or substantially all assets of one, or subdividing an organization, or +merging organizations. If propagation of a covered work results from an entity +transaction, each party to that transaction who receives a copy of the work also +receives whatever licenses to the work the party's predecessor in interest had or +could give under the previous paragraph, plus a right to possession of the +Corresponding Source of the work from the predecessor in interest, if the predecessor +has it or can get it with reasonable efforts. + +You may not impose any further restrictions on the exercise of the rights granted or +affirmed under this License. For example, you may not impose a license fee, royalty, +or other charge for exercise of rights granted under this License, and you may not +initiate litigation (including a cross-claim or counterclaim in a lawsuit) alleging +that any patent claim is infringed by making, using, selling, offering for sale, or +importing the Program or any portion of it. + +### 11. Patents + +A “contributor” is a copyright holder who authorizes use under this +License of the Program or a work on which the Program is based. The work thus +licensed is called the contributor's “contributor version”. + +A contributor's “essential patent claims” are all patent claims owned or +controlled by the contributor, whether already acquired or hereafter acquired, that +would be infringed by some manner, permitted by this License, of making, using, or +selling its contributor version, but do not include claims that would be infringed +only as a consequence of further modification of the contributor version. For +purposes of this definition, “control” includes the right to grant patent +sublicenses in a manner consistent with the requirements of this License. + +Each contributor grants you a non-exclusive, worldwide, royalty-free patent license +under the contributor's essential patent claims, to make, use, sell, offer for sale, +import and otherwise run, modify and propagate the contents of its contributor +version. + +In the following three paragraphs, a “patent license” is any express +agreement or commitment, however denominated, not to enforce a patent (such as an +express permission to practice a patent or covenant not to sue for patent +infringement). To “grant” such a patent license to a party means to make +such an agreement or commitment not to enforce a patent against the party. + +If you convey a covered work, knowingly relying on a patent license, and the +Corresponding Source of the work is not available for anyone to copy, free of charge +and under the terms of this License, through a publicly available network server or +other readily accessible means, then you must either **(1)** cause the Corresponding +Source to be so available, or **(2)** arrange to deprive yourself of the benefit of the +patent license for this particular work, or **(3)** arrange, in a manner consistent with +the requirements of this License, to extend the patent license to downstream +recipients. “Knowingly relying” means you have actual knowledge that, but +for the patent license, your conveying the covered work in a country, or your +recipient's use of the covered work in a country, would infringe one or more +identifiable patents in that country that you have reason to believe are valid. + +If, pursuant to or in connection with a single transaction or arrangement, you +convey, or propagate by procuring conveyance of, a covered work, and grant a patent +license to some of the parties receiving the covered work authorizing them to use, +propagate, modify or convey a specific copy of the covered work, then the patent +license you grant is automatically extended to all recipients of the covered work and +works based on it. + +A patent license is “discriminatory” if it does not include within the +scope of its coverage, prohibits the exercise of, or is conditioned on the +non-exercise of one or more of the rights that are specifically granted under this +License. You may not convey a covered work if you are a party to an arrangement with +a third party that is in the business of distributing software, under which you make +payment to the third party based on the extent of your activity of conveying the +work, and under which the third party grants, to any of the parties who would receive +the covered work from you, a discriminatory patent license **(a)** in connection with +copies of the covered work conveyed by you (or copies made from those copies), or **(b)** +primarily for and in connection with specific products or compilations that contain +the covered work, unless you entered into that arrangement, or that patent license +was granted, prior to 28 March 2007. + +Nothing in this License shall be construed as excluding or limiting any implied +license or other defenses to infringement that may otherwise be available to you +under applicable patent law. + +### 12. No Surrender of Others' Freedom + +If conditions are imposed on you (whether by court order, agreement or otherwise) +that contradict the conditions of this License, they do not excuse you from the +conditions of this License. If you cannot convey a covered work so as to satisfy +simultaneously your obligations under this License and any other pertinent +obligations, then as a consequence you may not convey it at all. For example, if you +agree to terms that obligate you to collect a royalty for further conveying from +those to whom you convey the Program, the only way you could satisfy both those terms +and this License would be to refrain entirely from conveying the Program. + +### 13. Use with the GNU Affero General Public License + +Notwithstanding any other provision of this License, you have permission to link or +combine any covered work with a work licensed under version 3 of the GNU Affero +General Public License into a single combined work, and to convey the resulting work. +The terms of this License will continue to apply to the part which is the covered +work, but the special requirements of the GNU Affero General Public License, section +13, concerning interaction through a network will apply to the combination as such. + +### 14. Revised Versions of this License + +The Free Software Foundation may publish revised and/or new versions of the GNU +General Public License from time to time. Such new versions will be similar in spirit +to the present version, but may differ in detail to address new problems or concerns. + +Each version is given a distinguishing version number. If the Program specifies that +a certain numbered version of the GNU General Public License “or any later +version” applies to it, you have the option of following the terms and +conditions either of that numbered version or of any later version published by the +Free Software Foundation. If the Program does not specify a version number of the GNU +General Public License, you may choose any version ever published by the Free +Software Foundation. + +If the Program specifies that a proxy can decide which future versions of the GNU +General Public License can be used, that proxy's public statement of acceptance of a +version permanently authorizes you to choose that version for the Program. + +Later license versions may give you additional or different permissions. However, no +additional obligations are imposed on any author or copyright holder as a result of +your choosing to follow a later version. + +### 15. Disclaimer of Warranty + +THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. +EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES +PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER +EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE +QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE +DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. + +### 16. Limitation of Liability + +IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY +COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS +PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, +INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE +PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE +OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE +WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE +POSSIBILITY OF SUCH DAMAGES. + +### 17. Interpretation of Sections 15 and 16 + +If the disclaimer of warranty and limitation of liability provided above cannot be +given local legal effect according to their terms, reviewing courts shall apply local +law that most closely approximates an absolute waiver of all civil liability in +connection with the Program, unless a warranty or assumption of liability accompanies +a copy of the Program in return for a fee. + +_END OF TERMS AND CONDITIONS_ + +## How to Apply These Terms to Your New Programs + +If you develop a new program, and you want it to be of the greatest possible use to +the public, the best way to achieve this is to make it free software which everyone +can redistribute and change under these terms. + +To do so, attach the following notices to the program. It is safest to attach them +to the start of each source file to most effectively state the exclusion of warranty; +and each file should have at least the “copyright” line and a pointer to +where the full notice is found. + + + Copyright (C) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . + +Also add information on how to contact you by electronic and paper mail. + +If the program does terminal interaction, make it output a short notice like this +when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type 'show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type 'show c' for details. + +The hypothetical commands `show w` and `show c` should show the appropriate parts of +the General Public License. Of course, your program's commands might be different; +for a GUI interface, you would use an “about box”. + +You should also get your employer (if you work as a programmer) or school, if any, to +sign a “copyright disclaimer” for the program, if necessary. For more +information on this, and how to apply and follow the GNU GPL, see +<>. + +The GNU General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may consider it +more useful to permit linking proprietary applications with the library. If this is +what you want to do, use the GNU Lesser General Public License instead of this +License. But first, please read +<>. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..6bc3e7f --- /dev/null +++ b/Makefile @@ -0,0 +1,20 @@ +python = python3 + +clean: + rm -rf **/__pycache__ **/__mypycache__ **/*.pyc build dist neopaste.egg-info + +test: + $(python) -m py_compile neopaste/*.py + +build: + gap neopaste/cli.toml -o neopaste/cli.py + $(python) setup.py sdist bdist_wheel + +reinstall: uninstall install + +install: + pipx install . + +uninstall: + pipx uninstall neopaste + diff --git a/README.md b/README.md new file mode 100644 index 0000000..d394f98 --- /dev/null +++ b/README.md @@ -0,0 +1,63 @@ +# neopaste + +Paste file streams side-by-side, without concern for Unicode wide characters or +ANSI color codes. + +### Usage + +``` +npaste [OPTIONS] [FILE ..] +``` + +|Option |Description | +|:-------------------|:--------------------------------------------| +|`--delimiter DELIM` |Delimit columns using `DELIM` (default: tab) | +|`--left` |Left-justify columns (default) | +|`--right` |Right-justify columns | +|`--center` |Center columns | +|`--help` |Print help message | +|`--version` |Print software version | + +If `FILE` is `-`, or if no `FILE`s, read from STDIN. + + +### Example + +Now, a core tenet of neopaste is compatibility with ANSI color codes. None of +which, of course, appear below. In fact, the use of `unbuffer` likely seems +strange. *Please* pretend that there are colors below. + +``` +$ npaste -d ' ' \ + <(df -h | grep -e '^Filesystem' -e '^/dev') \ + <(unbuffer cal) \ + <(wego | head -7) +Filesystem Size Used Avail Use% Mounted on June 2020 Weather for Buffalo, US +/dev/sda3 220G 178G 31G 86% / Su Mo Tu We Th Fr Sa +/dev/sda2 511M 62M 450M 13% /boot 1 2 3 4 5 6 _`/"".-. light rain +/dev/sdc1 916G 101G 769G 12% /hdd 7 8 9 10 11 12 13 ,\_( ). 73 (75) °F + 14 15 16 17 18 19 20 /(___(__) ↑ 5 mph + 21 22 23 24 25 26 27 ʻ ʻ ʻ ʻ + 28 29 30 ʻ ʻ ʻ ʻ 0.0 in/h +``` + +---- + + +## Dependencies + +My recommendation is to install this software through **pipx**, which will +manage runtime dependencies for you. + +The only runtime dependency is **wcwidth**, available from PyPI through pip. + +Testing and build dependencies are **setuptools** and +[gap](https://git.dominic-ricottone.com/gap). + +---- + + +## Licensing + +This software is distributed under the GPL license. + diff --git a/neopaste/__main__.py b/neopaste/__main__.py new file mode 100644 index 0000000..e3fbef0 --- /dev/null +++ b/neopaste/__main__.py @@ -0,0 +1,39 @@ +#!/usr/bin/env python3 + +import sys + +from . import cli +from . import internals +from . import columnar + +def main(): + _config, _positionals = cli.main(sys.argv[1:]) + + if "version" in _config.keys(): + internals._print_version() + sys.exit(0) + elif "help" in _config.keys(): + internals._print_help() + sys.exit(0) + + if "left" in _config.keys(): + process = columnar.ljust_columns + elif "right" in _config.keys(): + process = columnar.rjust_columns + elif "center" in _config.keys(): + process = columnar.center_columns + else: + process = columnar.ljust_columns + + _delimiter = _config.get("delimiter", "\t") + + contents = internals._read_files(_positionals) + + for line in process(contents): + sys.stdout.write(_delimiter.join(line) + "\n") + + sys.exit(0) + +if __name__ == "__main__": + main() + diff --git a/neopaste/cli.py b/neopaste/cli.py new file mode 100644 index 0000000..d7256ba --- /dev/null +++ b/neopaste/cli.py @@ -0,0 +1,175 @@ +#!/usr/bin/env python3 + +import re + +def main(arguments): + config=dict() + positional=[] + pattern=re.compile(r"(?:-(?:c|d|h|x|l|r|v|V)|--(?:center|delimiter|help|left|right|version))(?:=.*)?$") + consuming,needing,wanting=None,0,0 + attached_value=None + def log(*values): pass + + if "--debug-gap-behavior" in arguments: + def log(*values): print(*values) + while len(arguments) and arguments[0]!="--": + if arguments[0]=="--debug-gap-behavior": + arguments.pop(0) + continue + log(f'processing {arguments[0]}...') + if consuming is not None: + log(f'option {consuming} is consuming') + if config[consuming] is None: + config[consuming]=arguments.pop(0) + log(f'option {consuming} = {config[consuming]}') + else: + config[consuming].append(arguments.pop(0)) + log(f'option {consuming} = {config[consuming]}') + needing-=1 + wanting-=1 + if wanting==0: + log(f'option {consuming} is no longer consuming') + consuming,needing,wanting=None,0,0 + elif pattern.match(arguments[0]): + log(f'{arguments[0]} matched an option') + option = arguments.pop(0).lstrip('-') + if '=' in option: + log(f'{option} has an attached value') + option,attached_value=option.split('=',1) + log(f'{option} is an option') + if option=="center": + if attached_value is not None: + message=( + 'unexpected value while parsing "center"' + ' (expected 0 values)' + ) + raise ValueError(message) from None + config["center"]=True + elif option=="delimiter": + if attached_value is not None: + config["delimiter"]=attached_value + attached_value=None + consuming,needing,wanting=None,0,0 + else: + config["delimiter"]=None + consuming,needing,wanting="delimiter",1,1 + elif option=="help": + if attached_value is not None: + message=( + 'unexpected value while parsing "help"' + ' (expected 0 values)' + ) + raise ValueError(message) from None + config["help"]=True + elif option=="left": + if attached_value is not None: + message=( + 'unexpected value while parsing "left"' + ' (expected 0 values)' + ) + raise ValueError(message) from None + config["left"]=True + elif option=="right": + if attached_value is not None: + message=( + 'unexpected value while parsing "right"' + ' (expected 0 values)' + ) + raise ValueError(message) from None + config["right"]=True + elif option=="version": + if attached_value is not None: + message=( + 'unexpected value while parsing "version"' + ' (expected 0 values)' + ) + raise ValueError(message) from None + config["version"]=True + elif option=="c": + if attached_value is not None: + message=( + 'unexpected value while parsing "center"' + ' (expected 0 values)' + ) + raise ValueError(message) from None + config["center"]=True + elif option=="d": + if attached_value is not None: + config["delimiter"]=attached_value + attached_value=None + consuming,needing,wanting=None,0,0 + else: + config["delimiter"]=None + consuming,needing,wanting="delimiter",1,1 + elif option=="h": + if attached_value is not None: + message=( + 'unexpected value while parsing "help"' + ' (expected 0 values)' + ) + raise ValueError(message) from None + config["help"]=True + elif option=="x": + if attached_value is not None: + message=( + 'unexpected value while parsing "help"' + ' (expected 0 values)' + ) + raise ValueError(message) from None + config["help"]=True + elif option=="l": + if attached_value is not None: + message=( + 'unexpected value while parsing "left"' + ' (expected 0 values)' + ) + raise ValueError(message) from None + config["left"]=True + elif option=="r": + if attached_value is not None: + message=( + 'unexpected value while parsing "right"' + ' (expected 0 values)' + ) + raise ValueError(message) from None + config["right"]=True + elif option=="v": + if attached_value is not None: + message=( + 'unexpected value while parsing "version"' + ' (expected 0 values)' + ) + raise ValueError(message) from None + config["version"]=True + elif option=="V": + if attached_value is not None: + message=( + 'unexpected value while parsing "version"' + ' (expected 0 values)' + ) + raise ValueError(message) from None + config["version"]=True + else: + positional.append(arguments.pop(0)) + if needing>0: + message=( + f'unexpected end while parsing "{consuming}"' + f' (expected {needing} values)' + ) + raise ValueError(message) from None + for argument in arguments[1:]: + if argument=="--debug-gap-behavior": + continue + positional.append(argument) + return config,positional + +if __name__=="__main__": + import sys + cfg,pos = main(sys.argv[1:]) + cfg = {k:v for k,v in cfg.items() if v is not None} + if len(cfg): + print("Options:") + for k,v in cfg.items(): + print(f"{k:20} = {v}") + if len(pos): + print("Positional arguments:", ", ".join(pos)) diff --git a/neopaste/cli.toml b/neopaste/cli.toml new file mode 100644 index 0000000..1fc0bb3 --- /dev/null +++ b/neopaste/cli.toml @@ -0,0 +1,24 @@ +[center] +number = 0 +alternatives = ['c'] + +[delimiter] +number = 1 +alternatives = ['d'] + +[help] +number = 0 +alternatives = ['h', 'x'] + +[left] +number = 0 +alternatives = ['l'] + +[right] +number = 0 +alternatives = ['r'] + +[version] +number = 0 +alternatives = ['v', 'V'] + diff --git a/neopaste/columnar.py b/neopaste/columnar.py new file mode 100644 index 0000000..b01bd4f --- /dev/null +++ b/neopaste/columnar.py @@ -0,0 +1,106 @@ +#!/usr/bin/env python3 + +import re +import itertools +from typing import List, Tuple, Iterator + +REGEX_MATCH = re.compile(r'\x1b[^m]*m') +REGEX_SPLIT = re.compile(r'(\x1b[^m]*m)') + +def _uncolored_length(s: str) -> str: + """Remove ANSI codes from string s.""" + return len(REGEX_MATCH.sub('', s)) + +def _spaces(n: int) -> str: + """Return a string of N spaces.""" + if n > 0: + return " " * n + else: + return "" + +def _max_length(items: List) -> int: + """Find length of longest item within an item's contents.""" + length = 0 + for item in items: + if isinstance(item, str): + _len = _uncolored_length(item) + else: + _len = len(item) + if _len > length: + length = _len + return length + +def _ljust(width: int, items: List[str], *, length: int = 0) -> Iterator[str]: + """Iterate over left-justified lines within a file's contents.""" + for item in items: + length -= 1 + yield item + _spaces(width - _uncolored_length(item)) + if length > 0: + for _ in range(length): + yield _spaces(width) + + +def _rjust(width: int, items: List[str], *, length: int = 0) -> Iterator[str]: + """Iterate over right-justified lines within a file's contents.""" + for item in items: + length -= 1 + yield _spaces(width - _uncolored_length(item)) + item + if length > 0: + for _ in range(length): + yield _spaces(width) + +def _center(width: int, items: List[str], *, length: int = 0) -> Iterator[str]: + """Iterate over centered lines within a file's contents.""" + for item in items: + length -= 1 + _width = width - _uncolored_length(item) + _pre = _width // 2 + _post = _width - _pre + yield _spaces(_pre) + item + _spaces(_post) + if length > 0: + for _ in range(length): + yield _spaces(width) + +def _column_widths( + contents: List[List[str]], +) -> Iterator[int]: + """Iterate over column lengths, computed from a list of file contents.""" + for items in contents: + yield _max_length(items) + +def ljust_columns( + contents: List[List[str]], +) -> Iterator[List[str]]: + """Iterate over lines containing left-justified columns, built from a list + of file contents (each to a row). + """ + _height = _max_length(contents) + _widths = _column_widths(contents) + _cols = [_ljust(w, c, length=_height) for w,c in zip(_widths, contents)] + _rows = zip(*_cols) + yield from _rows + +def rjust_columns( + contents: List[List[str]], +) -> Iterator[List[str]]: + """Iterate over lines containing right-justified columns, built from a list + of file contents (each to a row). + """ + _height = _max_length(contents) + _widths = _column_widths(contents) + _cols = [_rjust(w, c, length=_height) for w,c in zip(_widths, contents)] + _rows = zip(*_cols) + yield from _rows + +def center_columns( + contents: List[List[str]], +) -> Iterator[List[str]]: + """Iterate over lines containing centered columns, built from a list of + file contents (each to a row). + """ + _height = _max_length(contents) + _widths = _column_widths(contents) + _cols = [_center(w, c, length=_height) for w,c in zip(_widths, contents)] + _rows = zip(*_cols) + yield from _rows + diff --git a/neopaste/internals.py b/neopaste/internals.py new file mode 100644 index 0000000..951247c --- /dev/null +++ b/neopaste/internals.py @@ -0,0 +1,61 @@ +#!/usr/bin/env python3 + +import sys +from typing import * + +VERSION = (1,0,0,) + +def _read_stdin() -> Iterator[str]: + try: + for line in sys.stdin.readlines(): + yield line.rstrip() + except KeyboardInterrupt: + sys.stdout.write("\n") + +def _read_file(filename: str) -> Iterator[str]: + try: + with open(filename, 'r') as f: + for line in f.readlines(): + yield line.rstrip() + except OSError: + _print_invalid_file(filename) + +def _read_files(filenames: List[str]) -> List[List[str]]: + contents = list() + if len(filenames) == 0: + contents.append(list(_read_stdin())) + else: + for filename in filenames: + if filename == '-': + contents.append(list(_read_stdin())) + else: + contents.append(list(_read_file(filename))) + return contents + +def _print_help() -> None: + _msg = ( + "Usage: npaste [OPTIONS] [FILE..]", + "neopaste - Paste file streams side-by-side", + "Options:", + " -c, --center center the columns", + " -d DELIM, --delimiter DELIM delimit columns with DELIM", + " -l, --left left-justify the columns [Default]", + " -r, --right right-justify the columns", + " -h, -x, --help print this message", + " -v, -V, --version print version", + "If FILE is -, or if no FILEs, read from STDIN.", + ) + sys.stderr.write("\n".join(_msg) + "\n") + +def _print_version() -> None: + _msg = ( + "npaste {0}".format(".".join(str(v) for v in VERSION)), + ) + sys.stderr.write("\n".join(_msg) + "\n") + +def _print_usage() -> None: + _msg = ( + "Usage: npaste [OPTIONS] [FILE..]", + ) + sys.stderr.write("\n".join(_msg) + "\n") + diff --git a/requirements.txt b/requirements.txt new file mode 100644 index 0000000..eabb06e --- /dev/null +++ b/requirements.txt @@ -0,0 +1,3 @@ +setuptools>=47.1.1 +wcwidth>=0.2.4 + diff --git a/setup.py b/setup.py new file mode 100644 index 0000000..1c3283f --- /dev/null +++ b/setup.py @@ -0,0 +1,24 @@ +#!/usr/bin/env python3 + +from setuptools import setup + +long_description = None +with open('README.md', encoding='utf-8') as f: + long_description = f.read() + +setup( + name="neopaste", + packages=["neopaste"], + version="1.0.0", + license="GPL", + description="Paste file streams side-by-side", + long_description=long_description, + long_description_content_type='text/markdown', + author="Dominic Ricottone", + author_email="me@dominic-ricottone.com", + url="git.dominic-ricottone.com/neopaste", + entry_points={"console_scripts": ["npaste = neopaste.__main__:main"]}, + install_requires=["wcwidth>=0.2.4"], + python_requires=">=3.6", +) + -- 2.45.2