├── LICENSE.md ├── README.org ├── demo.gif └── esh-autosuggest.el /LICENSE.md: -------------------------------------------------------------------------------- 1 | ### GNU GENERAL PUBLIC LICENSE 2 | 3 | Version 3, 29 June 2007 4 | 5 | Copyright (C) 2007 Free Software Foundation, Inc. 6 | 7 | 8 | Everyone is permitted to copy and distribute verbatim copies of this 9 | license document, but changing it is not allowed. 10 | 11 | ### Preamble 12 | 13 | The GNU General Public License is a free, copyleft license for 14 | software and other kinds of works. 15 | 16 | The licenses for most software and other practical works are designed 17 | to take away your freedom to share and change the works. By contrast, 18 | the GNU General Public License is intended to guarantee your freedom 19 | to share and change all versions of a program--to make sure it remains 20 | free software for all its users. We, the Free Software Foundation, use 21 | the GNU General Public License for most of our software; it applies 22 | also to any other work released this way by its authors. You can apply 23 | it to your programs, too. 24 | 25 | When we speak of free software, we are referring to freedom, not 26 | price. Our General Public Licenses are designed to make sure that you 27 | have the freedom to distribute copies of free software (and charge for 28 | them if you wish), that you receive source code or can get it if you 29 | want it, that you can change the software or use pieces of it in new 30 | free programs, and that you know you can do these things. 31 | 32 | To protect your rights, we need to prevent others from denying you 33 | these rights or asking you to surrender the rights. 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Definitions. 79 | 80 | "This License" refers to version 3 of the GNU General Public License. 81 | 82 | "Copyright" also means copyright-like laws that apply to other kinds 83 | of works, such as semiconductor masks. 84 | 85 | "The Program" refers to any copyrightable work licensed under this 86 | License. Each licensee is addressed as "you". "Licensees" and 87 | "recipients" may be individuals or organizations. 88 | 89 | To "modify" a work means to copy from or adapt all or part of the work 90 | in a fashion requiring copyright permission, other than the making of 91 | an exact copy. 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The output from running a 165 | covered work is covered by this License only if the output, given its 166 | content, constitutes a covered work. This License acknowledges your 167 | rights of fair use or other equivalent, as provided by copyright law. 168 | 169 | You may make, run and propagate covered works that you do not convey, 170 | without conditions so long as your license otherwise remains in force. 171 | You may convey covered works to others for the sole purpose of having 172 | them make modifications exclusively for you, or provide you with 173 | facilities for running those works, provided that you comply with the 174 | terms of this License in conveying all material for which you do not 175 | control copyright. Those thus making or running the covered works for 176 | you must do so exclusively on your behalf, under your direction and 177 | control, on terms that prohibit them from making any copies of your 178 | copyrighted material outside their relationship with you. 179 | 180 | Conveying under any other circumstances is permitted solely under the 181 | conditions stated below. Sublicensing is not allowed; section 10 makes 182 | it unnecessary. 183 | 184 | #### 3. Protecting Users' Legal Rights From Anti-Circumvention Law. 185 | 186 | No covered work shall be deemed part of an effective technological 187 | measure under any applicable law fulfilling obligations under article 188 | 11 of the WIPO copyright treaty adopted on 20 December 1996, or 189 | similar laws prohibiting or restricting circumvention of such 190 | measures. 191 | 192 | When you convey a covered work, you waive any legal power to forbid 193 | circumvention of technological measures to the extent such 194 | circumvention is effected by exercising rights under this License with 195 | respect to the covered work, and you disclaim any intention to limit 196 | operation or modification of the work as a means of enforcing, against 197 | the work's users, your or third parties' legal rights to forbid 198 | circumvention of technological measures. 199 | 200 | #### 4. 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But this requirement does not apply 325 | if neither you nor any third party retains the ability to install 326 | modified object code on the User Product (for example, the work has 327 | been installed in ROM). 328 | 329 | The requirement to provide Installation Information does not include a 330 | requirement to continue to provide support service, warranty, or 331 | updates for a work that has been modified or installed by the 332 | recipient, or for the User Product in which it has been modified or 333 | installed. 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If additional permissions 351 | apply only to part of the Program, that part may be used separately 352 | under those permissions, but the entire Program remains governed by 353 | this License without regard to the additional permissions. 354 | 355 | When you convey a copy of a covered work, you may at your option 356 | remove any additional permissions from that copy, or from any part of 357 | it. (Additional permissions may be written to require their own 358 | removal in certain cases when you modify the work.) You may place 359 | additional permissions on material, added by you to a covered work, 360 | for which you have or can give appropriate copyright permission. 361 | 362 | Notwithstanding any other provision of this License, for material you 363 | add to a covered work, you may (if authorized by the copyright holders 364 | of that material) supplement the terms of this License with terms: 365 | 366 | - a) Disclaiming warranty or limiting liability differently from the 367 | terms of sections 15 and 16 of this License; or 368 | - b) Requiring preservation of specified reasonable legal notices or 369 | author attributions in that material or in the Appropriate Legal 370 | Notices displayed by works containing it; or 371 | - c) Prohibiting misrepresentation of the origin of that material, 372 | or requiring that modified versions of such material be marked in 373 | reasonable ways as different from the original version; or 374 | - d) Limiting the use for publicity purposes of names of licensors 375 | or authors of the material; or 376 | - e) Declining to grant rights under trademark law for use of some 377 | trade names, trademarks, or service marks; or 378 | - f) Requiring indemnification of licensors and authors of that 379 | material by anyone who conveys the material (or modified versions 380 | of it) with contractual assumptions of liability to the recipient, 381 | for any liability that these contractual assumptions directly 382 | impose on those licensors and authors. 383 | 384 | All other non-permissive additional terms are considered "further 385 | restrictions" within the meaning of section 10. If the Program as you 386 | received it, or any part of it, contains a notice stating that it is 387 | governed by this License along with a term that is a further 388 | restriction, you may remove that term. If a license document contains 389 | a further restriction but permits relicensing or conveying under this 390 | License, you may add to a covered work material governed by the terms 391 | of that license document, provided that the further restriction does 392 | not survive such relicensing or conveying. 393 | 394 | If you add terms to a covered work in accord with this section, you 395 | must place, in the relevant source files, a statement of the 396 | additional terms that apply to those files, or a notice indicating 397 | where to find the applicable terms. 398 | 399 | Additional terms, permissive or non-permissive, may be stated in the 400 | form of a separately written license, or stated as exceptions; the 401 | above requirements apply either way. 402 | 403 | #### 8. Termination. 404 | 405 | You may not propagate or modify a covered work except as expressly 406 | provided under this License. Any attempt otherwise to propagate or 407 | modify it is void, and will automatically terminate your rights under 408 | this License (including any patent licenses granted under the third 409 | paragraph of section 11). 410 | 411 | However, if you cease all violation of this License, then your license 412 | from a particular copyright holder is reinstated (a) provisionally, 413 | unless and until the copyright holder explicitly and finally 414 | terminates your license, and (b) permanently, if the copyright holder 415 | fails to notify you of the violation by some reasonable means prior to 416 | 60 days after the cessation. 417 | 418 | Moreover, your license from a particular copyright holder is 419 | reinstated permanently if the copyright holder notifies you of the 420 | violation by some reasonable means, this is the first time you have 421 | received notice of violation of this License (for any work) from that 422 | copyright holder, and you cure the violation prior to 30 days after 423 | your receipt of the notice. 424 | 425 | Termination of your rights under this section does not terminate the 426 | licenses of parties who have received copies or rights from you under 427 | this License. If your rights have been terminated and not permanently 428 | reinstated, you do not qualify to receive new licenses for the same 429 | material under section 10. 430 | 431 | #### 9. Acceptance Not Required for Having Copies. 432 | 433 | You are not required to accept this License in order to receive or run 434 | a copy of the Program. Ancillary propagation of a covered work 435 | occurring solely as a consequence of using peer-to-peer transmission 436 | to receive a copy likewise does not require acceptance. However, 437 | nothing other than this License grants you permission to propagate or 438 | modify any covered work. These actions infringe copyright if you do 439 | not accept this License. Therefore, by modifying or propagating a 440 | covered work, you indicate your acceptance of this License to do so. 441 | 442 | #### 10. Automatic Licensing of Downstream Recipients. 443 | 444 | Each time you convey a covered work, the recipient automatically 445 | receives a license from the original licensors, to run, modify and 446 | propagate that work, subject to this License. You are not responsible 447 | for enforcing compliance by third parties with this License. 448 | 449 | An "entity transaction" is a transaction transferring control of an 450 | organization, or substantially all assets of one, or subdividing an 451 | organization, or merging organizations. If propagation of a covered 452 | work results from an entity transaction, each party to that 453 | transaction who receives a copy of the work also receives whatever 454 | licenses to the work the party's predecessor in interest had or could 455 | give under the previous paragraph, plus a right to possession of the 456 | Corresponding Source of the work from the predecessor in interest, if 457 | the predecessor has it or can get it with reasonable efforts. 458 | 459 | You may not impose any further restrictions on the exercise of the 460 | rights granted or affirmed under this License. For example, you may 461 | not impose a license fee, royalty, or other charge for exercise of 462 | rights granted under this License, and you may not initiate litigation 463 | (including a cross-claim or counterclaim in a lawsuit) alleging that 464 | any patent claim is infringed by making, using, selling, offering for 465 | sale, or importing the Program or any portion of it. 466 | 467 | #### 11. Patents. 468 | 469 | A "contributor" is a copyright holder who authorizes use under this 470 | License of the Program or a work on which the Program is based. The 471 | work thus licensed is called the contributor's "contributor version". 472 | 473 | A contributor's "essential patent claims" are all patent claims owned 474 | or controlled by the contributor, whether already acquired or 475 | hereafter acquired, that would be infringed by some manner, permitted 476 | by this License, of making, using, or selling its contributor version, 477 | but do not include claims that would be infringed only as a 478 | consequence of further modification of the contributor version. For 479 | purposes of this definition, "control" includes the right to grant 480 | patent sublicenses in a manner consistent with the requirements of 481 | this License. 482 | 483 | Each contributor grants you a non-exclusive, worldwide, royalty-free 484 | patent license under the contributor's essential patent claims, to 485 | make, use, sell, offer for sale, import and otherwise run, modify and 486 | propagate the contents of its contributor version. 487 | 488 | In the following three paragraphs, a "patent license" is any express 489 | agreement or commitment, however denominated, not to enforce a patent 490 | (such as an express permission to practice a patent or covenant not to 491 | sue for patent infringement). To "grant" such a patent license to a 492 | party means to make such an agreement or commitment not to enforce a 493 | patent against the party. 494 | 495 | If you convey a covered work, knowingly relying on a patent license, 496 | and the Corresponding Source of the work is not available for anyone 497 | to copy, free of charge and under the terms of this License, through a 498 | publicly available network server or other readily accessible means, 499 | then you must either (1) cause the Corresponding Source to be so 500 | available, or (2) arrange to deprive yourself of the benefit of the 501 | patent license for this particular work, or (3) arrange, in a manner 502 | consistent with the requirements of this License, to extend the patent 503 | license to downstream recipients. "Knowingly relying" means you have 504 | actual knowledge that, but for the patent license, your conveying the 505 | covered work in a country, or your recipient's use of the covered work 506 | in a country, would infringe one or more identifiable patents in that 507 | country that you have reason to believe are valid. 508 | 509 | If, pursuant to or in connection with a single transaction or 510 | arrangement, you convey, or propagate by procuring conveyance of, a 511 | covered work, and grant a patent license to some of the parties 512 | receiving the covered work authorizing them to use, propagate, modify 513 | or convey a specific copy of the covered work, then the patent license 514 | you grant is automatically extended to all recipients of the covered 515 | work and works based on it. 516 | 517 | A patent license is "discriminatory" if it does not include within the 518 | scope of its coverage, prohibits the exercise of, or is conditioned on 519 | the non-exercise of one or more of the rights that are specifically 520 | granted under this License. You may not convey a covered work if you 521 | are a party to an arrangement with a third party that is in the 522 | business of distributing software, under which you make payment to the 523 | third party based on the extent of your activity of conveying the 524 | work, and under which the third party grants, to any of the parties 525 | who would receive the covered work from you, a discriminatory patent 526 | license (a) in connection with copies of the covered work conveyed by 527 | you (or copies made from those copies), or (b) primarily for and in 528 | connection with specific products or compilations that contain the 529 | covered work, unless you entered into that arrangement, or that patent 530 | license was granted, prior to 28 March 2007. 531 | 532 | Nothing in this License shall be construed as excluding or limiting 533 | any implied license or other defenses to infringement that may 534 | otherwise be available to you under applicable patent law. 535 | 536 | #### 12. No Surrender of Others' Freedom. 537 | 538 | If conditions are imposed on you (whether by court order, agreement or 539 | otherwise) that contradict the conditions of this License, they do not 540 | excuse you from the conditions of this License. If you cannot convey a 541 | covered work so as to satisfy simultaneously your obligations under 542 | this License and any other pertinent obligations, then as a 543 | consequence you may not convey it at all. For example, if you agree to 544 | terms that obligate you to collect a royalty for further conveying 545 | from those to whom you convey the Program, the only way you could 546 | satisfy both those terms and this License would be to refrain entirely 547 | from conveying the Program. 548 | 549 | #### 13. Use with the GNU Affero General Public License. 550 | 551 | Notwithstanding any other provision of this License, you have 552 | permission to link or combine any covered work with a work licensed 553 | under version 3 of the GNU Affero General Public License into a single 554 | combined work, and to convey the resulting work. The terms of this 555 | License will continue to apply to the part which is the covered work, 556 | but the special requirements of the GNU Affero General Public License, 557 | section 13, concerning interaction through a network will apply to the 558 | combination as such. 559 | 560 | #### 14. Revised Versions of this License. 561 | 562 | The Free Software Foundation may publish revised and/or new versions 563 | of the GNU General Public License from time to time. Such new versions 564 | will be similar in spirit to the present version, but may differ in 565 | detail to address new problems or concerns. 566 | 567 | Each version is given a distinguishing version number. If the Program 568 | specifies that a certain numbered version of the GNU General Public 569 | License "or any later version" applies to it, you have the option of 570 | following the terms and conditions either of that numbered version or 571 | of any later version published by the Free Software Foundation. If the 572 | Program does not specify a version number of the GNU General Public 573 | License, you may choose any version ever published by the Free 574 | Software Foundation. 575 | 576 | If the Program specifies that a proxy can decide which future versions 577 | of the GNU General Public License can be used, that proxy's public 578 | statement of acceptance of a version permanently authorizes you to 579 | choose that version for the Program. 580 | 581 | Later license versions may give you additional or different 582 | permissions. However, no additional obligations are imposed on any 583 | author or copyright holder as a result of your choosing to follow a 584 | later version. 585 | 586 | #### 15. Disclaimer of Warranty. 587 | 588 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 589 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 590 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT 591 | WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT 592 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 593 | A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND 594 | PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE 595 | DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR 596 | CORRECTION. 597 | 598 | #### 16. Limitation of Liability. 599 | 600 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 601 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR 602 | CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 603 | INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES 604 | ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT 605 | NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR 606 | LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM 607 | TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER 608 | PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. 609 | 610 | #### 17. Interpretation of Sections 15 and 16. 611 | 612 | If the disclaimer of warranty and limitation of liability provided 613 | above cannot be given local legal effect according to their terms, 614 | reviewing courts shall apply local law that most closely approximates 615 | an absolute waiver of all civil liability in connection with the 616 | Program, unless a warranty or assumption of liability accompanies a 617 | copy of the Program in return for a fee. 618 | 619 | END OF TERMS AND CONDITIONS 620 | 621 | ### How to Apply These Terms to Your New Programs 622 | 623 | If you develop a new program, and you want it to be of the greatest 624 | possible use to the public, the best way to achieve this is to make it 625 | free software which everyone can redistribute and change under these 626 | terms. 627 | 628 | To do so, attach the following notices to the program. It is safest to 629 | attach them to the start of each source file to most effectively state 630 | the exclusion of warranty; and each file should have at least the 631 | "copyright" line and a pointer to where the full notice is found. 632 | 633 | 634 | Copyright (C) 635 | 636 | This program is free software: you can redistribute it and/or modify 637 | it under the terms of the GNU General Public License as published by 638 | the Free Software Foundation, either version 3 of the License, or 639 | (at your option) any later version. 640 | 641 | This program is distributed in the hope that it will be useful, 642 | but WITHOUT ANY WARRANTY; without even the implied warranty of 643 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 644 | GNU General Public License for more details. 645 | 646 | You should have received a copy of the GNU General Public License 647 | along with this program. If not, see . 648 | 649 | Also add information on how to contact you by electronic and paper 650 | mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands \`show w' and \`show c' should show the 661 | appropriate parts of the General Public License. Of course, your 662 | program's commands might be different; for a GUI interface, you would 663 | use an "about box". 664 | 665 | You should also get your employer (if you work as a programmer) or 666 | school, if any, to sign a "copyright disclaimer" for the program, if 667 | necessary. For more information on this, and how to apply and follow 668 | the GNU GPL, see . 669 | 670 | The GNU General Public License does not permit incorporating your 671 | program into proprietary programs. If your program is a subroutine 672 | library, you may consider it more useful to permit linking proprietary 673 | applications with the library. If this is what you want to do, use the 674 | GNU Lesser General Public License instead of this License. But first, 675 | please read . 676 | -------------------------------------------------------------------------------- /README.org: -------------------------------------------------------------------------------- 1 | * esh-autosuggest 2 | [[https://melpa.org/#/esh-autosuggest][file:https://melpa.org/packages/esh-autosuggest-badge.svg]] 3 | [[https://stable.melpa.org/#/esh-autosuggest][file:https://stable.melpa.org/packages/esh-autosuggest-badge.svg]] 4 | 5 | Fish-like history autosuggestions in eshell 6 | 7 | [[demo.gif]] 8 | 9 | ** Installation 10 | This package is on melpa. If you have melpa in your package repositories, you 11 | can use ~M-x RET package-install RET esh-autosuggest~ or install 12 | with [[https://github.com/jwiegley/use-package][use-package]]: 13 | #+begin_src emacs-lisp 14 | (use-package esh-autosuggest 15 | :hook (eshell-mode . esh-autosuggest-mode) 16 | ;; If you have use-package-hook-name-suffix set to nil, uncomment and use the 17 | ;; line below instead: 18 | ;; :hook (eshell-mode-hook . esh-autosuggest-mode) 19 | :ensure t) 20 | #+end_src 21 | 22 | Alternatively, consider installing with [[https://github.com/raxod502/straight.el][straight.el]] or [[https://github.com/quelpa/quelpa-use-package][quelpa-use-package]]. 23 | 24 | Otherwise, download the files to somewhere on your load path, and require 25 | esh-autosuggest: 26 | #+begin_src emacs-lisp 27 | (require 'esh-autosuggest) 28 | #+end_src 29 | 30 | ** Usage 31 | This package assumes you use something other than company for eshell completion 32 | (e.g. ~eshell-pcomplete~, ~completion-at-point~, ~helm-esh-pcomplete~). 33 | ~company-mode~ is used solely as a mechanism for history autosuggestions. 34 | 35 | Unless you're using use-package's hook keyword as described in Installation, 36 | you can enable the autosuggestions with: 37 | #+begin_src emacs-lisp 38 | (add-hook 'eshell-mode-hook #'esh-autosuggest-mode) 39 | #+end_src 40 | 41 | *** Key Bindings 42 | - ~~ and ~C-f~ are used to select the suggestion. 43 | - ~M-~ and ~M-f~ are used to select the next word in the suggestion. 44 | 45 | Keys can be modified using ~esh-autosuggest-active-map~. 46 | 47 | If instead you don't want ~company-active-map~ to be overridden, you may set 48 | ~esh-autosuggest-use-company-map~ to ~t~. This may cause unexpected 49 | behavior when pressing ~RET~ or ~TAB~, depending on what you want those to do. 50 | To emulate fish-shell most closely, it is recommended you leave this ~nil~, as 51 | that will explicitly run your input (regardless of suggestion) on ~RET~, and 52 | bring up your preferred completion system on ~TAB~. 53 | 54 | *** Delay 55 | ~esh-autosuggest-delay~ defaults to 0 seconds. This is most like 56 | fish shell's instant history autosuggestions, but can be customized. 57 | 58 | *** With other backends (not recommended) 59 | It is technically possible to group this backend with other company backends 60 | like e.g. ~company-capf~ like so: 61 | 62 | #+begin_src emacs-lisp 63 | ;; don't add esh-autosuggest-mode to eshell-mode-hook 64 | (defun setup-eshell-grouped-backends () 65 | (setq-local company-backends 66 | '((company-capf esh-autosuggest)))) 67 | 68 | (add-hook 'eshell-mode-hook #'setup-eshell-grouped-backends) 69 | #+end_src 70 | 71 | This isn't recommended since the history suggestions will be neither fish-like, 72 | nor will they work after typing the first word on the command line, since 73 | company-backends need to share a prefix to work together smoothly. See 74 | [[https://github.com/company-mode/company-mode/issues/744][company-mode/company-mode#744]] for more information. 75 | 76 | *** Known bugs and workarounds 77 | If you're using [[https://github.com/emacs-evil/evil-collection][evil-collection]], there's a [[https://github.com/dieggsy/esh-autosuggest/issues/12][known issue]] that occurs when 78 | ~evil-collection-company-use-tng~ is set to ~t~ (the default). If you don't 79 | need that feature, you can set it to ~nil~ for the time being. 80 | 81 | ** Rationale and tips 82 | I made this package to help ease a transition from zsh to eshell as my main 83 | shell. The reason the main mechanism is a minor-mode that overrides 84 | company-mode is that I didn't find company-mode that useful for eshell 85 | completion. 86 | 87 | While the default popup-buffer frontend to pcomplete can be a bit annoying, 88 | I've found there are alternatives that make pcomplete behave more like normal 89 | shell completion. Try one or more of the following for tab completion: 90 | 91 | - [[https://github.com/Ambrevar/emacs-fish-completion][Ambrevar/emacs-fish-completion]] 92 | - If you use helm 93 | #+begin_src emacs-lisp 94 | (defun setup-eshell-helm-completion () 95 | (define-key eshell-mode-map [remap eshell-pcomplete] 'helm-esh-pcomplete)) 96 | 97 | (add-hook 'eshell-mode-hook #'setup-eshell-helm-completion) 98 | #+end_src 99 | - If you use ivy 100 | #+begin_src emacs-lisp 101 | (setq ivy-do-completion-in-region t) ; this is the default 102 | 103 | (defun setup-eshell-ivy-completion () 104 | (define-key eshell-mode-map [remap eshell-pcomplete] 'completion-at-point) 105 | ;; only if you want to use the minibuffer for completions instead of the 106 | ;; in-buffer interface 107 | (setq-local ivy-display-functions-alist 108 | (remq (assoc 'ivy-completion-in-region ivy-display-functions-alist) 109 | ivy-display-functions-alist))) 110 | 111 | (add-hook 'eshell-mode-hook #'setup-eshell-ivy-completion) 112 | #+end_src 113 | 114 | 115 | -------------------------------------------------------------------------------- /demo.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/dieggsy/esh-autosuggest/b3ae8eb2d6f8da1dc59f61a589003d741514d6f6/demo.gif -------------------------------------------------------------------------------- /esh-autosuggest.el: -------------------------------------------------------------------------------- 1 | ;;; esh-autosuggest.el --- History autosuggestions for eshell -*- lexical-binding: t; -*- 2 | 3 | ;; Copyright (C) 2017 Diego A. Mundo 4 | ;; Author: Diego A. Mundo 5 | ;; URL: http://github.com/dieggsy/esh-autosuggest 6 | ;; Git-Repository: git://github.com/dieggsy/esh-autosuggest.git 7 | ;; Created: 2017-10-28 8 | ;; Version: 2.0.1 9 | ;; Keywords: completion company matching convenience abbrev 10 | ;; Package-Requires: ((emacs "24.4") (company "0.9.4")) 11 | 12 | ;; This file is not part of GNU Emacs. 13 | 14 | ;; This program is free software: you can redistribute it and/or modify 15 | ;; it under the terms of the GNU General Public License as published by 16 | ;; the Free Software Foundation, either version 3 of the License, or 17 | ;; (at your option) any later version. 18 | 19 | ;; This program is distributed in the hope that it will be useful, 20 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of 21 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 | ;; GNU General Public License for more details. 23 | 24 | ;; You should have received a copy of the GNU General Public License 25 | ;; along with this program. If not, see . 26 | 27 | 28 | ;;; Commentary: 29 | 30 | ;; Provides a company backend that implements functionality similar to fish 31 | ;; shell history autosuggestions. 32 | 33 | ;;; Code: 34 | 35 | (require 'company) 36 | (require 'cl-lib) 37 | (eval-when-compile (require 'eshell)) 38 | (require 'em-prompt) 39 | 40 | (defgroup esh-autosuggest nil 41 | "Fish-like autosuggestions for eshell." 42 | :group 'company) 43 | 44 | (defcustom esh-autosuggest-delay 0 45 | "Delay for history autosuggestion." 46 | :group 'esh-autosuggest 47 | :type 'number) 48 | 49 | (defcustom esh-autosuggest-use-company-map nil 50 | "Instead of overriding `company-active-map', use as-is. 51 | 52 | This is disabled by default, as bindings in `company-active-map' 53 | to RET and TAB may interfere with command input and completion 54 | respectively." 55 | :group 'esh-autosuggest 56 | :type 'boolean) 57 | 58 | (defvar esh-autosuggest-active-map 59 | (let ((keymap (make-sparse-keymap))) 60 | (define-key keymap (kbd "") 'company-complete-selection) 61 | (define-key keymap (kbd "C-f") 'company-complete-selection) 62 | (define-key keymap (kbd "M-") 'esh-autosuggest-complete-word) 63 | (define-key keymap (kbd "M-f") 'esh-autosuggest-complete-word) 64 | keymap) 65 | "Keymap that is enabled during an active history 66 | autosuggestion.") 67 | 68 | (defun esh-autosuggest-candidates (prefix) 69 | "Select the first eshell history candidate that starts with PREFIX." 70 | (let* ((history 71 | (delete-dups 72 | (mapcar (lambda (str) 73 | (string-trim (substring-no-properties str))) 74 | (ring-elements eshell-history-ring)))) 75 | (most-similar (cl-find-if 76 | (lambda (str) 77 | (string-prefix-p prefix str)) 78 | history))) 79 | (when most-similar 80 | `(,most-similar)))) 81 | 82 | (defun esh-autosuggest-complete-word () 83 | (interactive) 84 | (save-excursion 85 | (let ((pos (point))) 86 | (company-complete-selection) 87 | (goto-char pos) 88 | (forward-word) 89 | (unless (or (eobp) (eolp)) 90 | (kill-line)))) 91 | (end-of-line) 92 | (ignore-errors 93 | (let ((inhibit-message t)) 94 | (company-begin-backend 'esh-autosuggest)))) 95 | 96 | (defun esh-autosuggest--prefix () 97 | "Get current eshell input." 98 | (let* ((input-start (save-excursion 99 | (eshell-previous-prompt 1) 100 | (eshell-next-prompt 1) 101 | (point))) 102 | (prefix 103 | (string-trim-left 104 | (buffer-substring-no-properties 105 | input-start 106 | (line-end-position))))) 107 | (if (not (string-empty-p prefix)) 108 | prefix 109 | 'stop))) 110 | 111 | ;;;###autoload 112 | (defun esh-autosuggest (command &optional arg &rest _ignored) 113 | "`company-mode' backend to provide eshell history suggestion." 114 | (interactive (list 'interactive)) 115 | (cl-case command 116 | (interactive (company-begin-backend 'esh-autosuggest)) 117 | (prefix (and (eq major-mode 'eshell-mode) 118 | (esh-autosuggest--prefix))) 119 | (candidates (esh-autosuggest-candidates arg)) 120 | (require-match 'never))) 121 | 122 | ;;;###autoload 123 | (define-minor-mode esh-autosuggest-mode 124 | "Enable fish-like autosuggestions in eshell. 125 | 126 | You can use to select the suggestion. This is 127 | customizable through `esh-autosuggest-active-map'. If 128 | you prefer to use the default value of `company-active-map', you 129 | may set the variable 130 | `esh-autosuggest-use-company-map', though this isn't 131 | recommended as RET and TAB may not work as expected (send input, 132 | trigger completions, respectively) when there is an active 133 | suggestion. 134 | 135 | The delay defaults to 0 seconds to emulate fish shell's 136 | instantaneous suggestions, but is customizable with 137 | `esh-autosuggest-delay'. 138 | 139 | Note: This assumes you want to use something other than company 140 | for shell completion, e.g. `eshell-pcomplete', 141 | `completion-at-point', or helm-esh-pcomplete, since 142 | `company-active-map', `company-backends', and `company-frontends' 143 | will be locally overriden and company will be used solely for 144 | history autosuggestions." 145 | :init-value nil 146 | :group 'esh-autosuggest 147 | (if esh-autosuggest-mode 148 | (progn 149 | (company-mode 1) 150 | (unless esh-autosuggest-use-company-map 151 | (setq-local company-active-map esh-autosuggest-active-map)) 152 | (setq-local company-idle-delay esh-autosuggest-delay) 153 | (setq-local company-backends '(esh-autosuggest)) 154 | (setq-local company-frontends '(company-preview-frontend))) 155 | (company-mode -1) 156 | (kill-local-variable 'company-active-map) 157 | (kill-local-variable 'company-idle-delay) 158 | (kill-local-variable 'company-backends) 159 | (kill-local-variable 'company-frontends))) 160 | 161 | (provide 'esh-autosuggest) 162 | 163 | ;;; esh-autosuggest.el ends here 164 | --------------------------------------------------------------------------------