From patchwork Tue Oct 29 10:00:43 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Derrick Stolee via GitGitGadget X-Patchwork-Id: 11217541 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CD5481390 for ; Tue, 29 Oct 2019 10:01:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A09482083E for ; Tue, 29 Oct 2019 10:01:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="IsrexNd7" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726851AbfJ2KA5 (ORCPT ); Tue, 29 Oct 2019 06:00:57 -0400 Received: from mail-wr1-f50.google.com ([209.85.221.50]:40935 "EHLO mail-wr1-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726510AbfJ2KAz (ORCPT ); Tue, 29 Oct 2019 06:00:55 -0400 Received: by mail-wr1-f50.google.com with SMTP id o28so12904686wro.7 for ; Tue, 29 Oct 2019 03:00:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=message-id:in-reply-to:references:from:date:subject:fcc :content-transfer-encoding:mime-version:to:cc; bh=bIQFN7Giyzj0Cp3ZhrwOhNDIUw+bJ062AZKqqcec2l0=; b=IsrexNd73vqmX5joNlytDq2F4BC+T7uC/lJ6DtxhQc23h7YVCUVr4wgyBvY6DT/GYD jXI2/LVysLkSwDDBIY1n9a4Cg2kUV4Zf+z6aeLcEKkCDiQEm+BmShm47BhaMDKLCUdvQ bLDR3xJxkhihsiZBLfbHwDh3fBjYT38RWSOzCPI6SkUMW0cA6TDYO7c/+upUrCqJK9V7 3UYXVJgTjkfkZFa7xU4IbfFacXIzuDgqFtIt/QtVVoSWeZALVaPq7YUWO59ZMpxKKZJC Mlx3KrPpzi98t6X/DCbLYaqqCrnkesW96L8x30AHZ0q4egM7jCUOREwQswfFn2E0/OUC uljQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:message-id:in-reply-to:references:from:date :subject:fcc:content-transfer-encoding:mime-version:to:cc; bh=bIQFN7Giyzj0Cp3ZhrwOhNDIUw+bJ062AZKqqcec2l0=; b=Umm9dGYeLbOEAyYVhx9SX1JD6b2mm97FttBTnaKrvtK+ib4V2SVvryexZJh0+kPMsa NjxvqfTDC3RddrMrG1xhRr9nhQibhcsb90RzjZ4oE5AuD3ZVevlk/WivPTFQO/Atj/oZ 5V6Jpev+mxbO5M/fYmsR1kr/F4s5b/oWn4tUB1aJU36KBCJN7K1DKASMDiE+nWZwLS7s cEOzv4r+GWJqYEbf/CWAWobuq4EFH+TEnZU/VCiqtSbl31mlWUkh84KUky6QnOHcjKDj sF4OwJc3Fa34Xio47niDMr4WnXVcLLRta6R+TeYAHYdXX4MTS2kWHEJxJ1261NZLgH6K t2Sg== X-Gm-Message-State: APjAAAUi2DTV/O3ItYzsrvrsYAitzTvwkAi7c6m2yS985MCswoSNfHZ2 NULie7xqE5ZfTwzWWfMvIljvc6z1 X-Google-Smtp-Source: APXvYqxZdWc9eCLntMqviB5iuAGUY6ZUeHWjuhCqgiDEbsBLRaemHSQUKmsKa6Y0bvka78BgTjJcmw== X-Received: by 2002:a5d:6a42:: with SMTP id t2mr18509830wrw.155.1572343253118; Tue, 29 Oct 2019 03:00:53 -0700 (PDT) Received: from [127.0.0.1] ([13.74.141.28]) by smtp.gmail.com with ESMTPSA id j14sm17155317wrj.35.2019.10.29.03.00.52 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 29 Oct 2019 03:00:52 -0700 (PDT) Message-Id: <9c900c58a20de7b14c5944f0c09372697634f0dd.1572343246.git.gitgitgadget@gmail.com> In-Reply-To: References: From: "Heba Waly via GitGitGadget" Date: Tue, 29 Oct 2019 10:00:43 +0000 Subject: [PATCH 07/10] refs: move doc to refs.h Fcc: Sent MIME-Version: 1.0 To: git@vger.kernel.org Cc: Heba Waly , Junio C Hamano , Heba Waly Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org From: Heba Waly Move the documentation from Documentation/technical/api-ref-iteration.txt to refs.h as it's easier for the developers to find the usage information beside the code instead of looking for it in another doc file. Also documentation/technical/api-ref-iteration.txt is removed because the information it has is now redundant and it'll be hard to keep it up to date and synchronized with the documentation in the header file. Signed-off-by: Heba Waly --- Documentation/technical/api-ref-iteration.txt | 78 ------------------- refs.h | 51 ++++++++++++ 2 files changed, 51 insertions(+), 78 deletions(-) delete mode 100644 Documentation/technical/api-ref-iteration.txt diff --git a/Documentation/technical/api-ref-iteration.txt b/Documentation/technical/api-ref-iteration.txt deleted file mode 100644 index ad9d019ff9..0000000000 --- a/Documentation/technical/api-ref-iteration.txt +++ /dev/null @@ -1,78 +0,0 @@ -ref iteration API -================= - - -Iteration of refs is done by using an iterate function which will call a -callback function for every ref. The callback function has this -signature: - - int handle_one_ref(const char *refname, const struct object_id *oid, - int flags, void *cb_data); - -There are different kinds of iterate functions which all take a -callback of this type. The callback is then called for each found ref -until the callback returns nonzero. The returned value is then also -returned by the iterate function. - -Iteration functions -------------------- - -* `head_ref()` just iterates the head ref. - -* `for_each_ref()` iterates all refs. - -* `for_each_ref_in()` iterates all refs which have a defined prefix and - strips that prefix from the passed variable refname. - -* `for_each_tag_ref()`, `for_each_branch_ref()`, `for_each_remote_ref()`, - `for_each_replace_ref()` iterate refs from the respective area. - -* `for_each_glob_ref()` iterates all refs that match the specified glob - pattern. - -* `for_each_glob_ref_in()` the previous and `for_each_ref_in()` combined. - -* Use `refs_` API for accessing submodules. The submodule ref store could - be obtained with `get_submodule_ref_store()`. - -* `for_each_rawref()` can be used to learn about broken ref and symref. - -* `for_each_reflog()` iterates each reflog file. - -Submodules ----------- - -If you want to iterate the refs of a submodule you first need to add the -submodules object database. You can do this by a code-snippet like -this: - - const char *path = "path/to/submodule" - if (add_submodule_odb(path)) - die("Error submodule '%s' not populated.", path); - -`add_submodule_odb()` will return zero on success. If you -do not do this you will get an error for each ref that it does not point -to a valid object. - -Note: As a side-effect of this you cannot safely assume that all -objects you lookup are available in superproject. All submodule objects -will be available the same way as the superprojects objects. - -Example: --------- - ----- -static int handle_remote_ref(const char *refname, - const unsigned char *sha1, int flags, void *cb_data) -{ - struct strbuf *output = cb_data; - strbuf_addf(output, "%s\n", refname); - return 0; -} - -... - - struct strbuf output = STRBUF_INIT; - for_each_remote_ref(handle_remote_ref, &output); - printf("%s", output.buf); ----- diff --git a/refs.h b/refs.h index 730d05ad91..545029c6d8 100644 --- a/refs.h +++ b/refs.h @@ -310,19 +310,35 @@ int refs_for_each_branch_ref(struct ref_store *refs, int refs_for_each_remote_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data); +/* just iterates the head ref. */ int head_ref(each_ref_fn fn, void *cb_data); + +/* iterates all refs. */ int for_each_ref(each_ref_fn fn, void *cb_data); + +/** + * iterates all refs which have a defined prefix and strips that prefix from + * the passed variable refname. + */ int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data); + int refs_for_each_fullref_in(struct ref_store *refs, const char *prefix, each_ref_fn fn, void *cb_data, unsigned int broken); int for_each_fullref_in(const char *prefix, each_ref_fn fn, void *cb_data, unsigned int broken); + +/** + * iterate refs from the respective area. + */ int for_each_tag_ref(each_ref_fn fn, void *cb_data); int for_each_branch_ref(each_ref_fn fn, void *cb_data); int for_each_remote_ref(each_ref_fn fn, void *cb_data); int for_each_replace_ref(struct repository *r, each_repo_ref_fn fn, void *cb_data); + +/* iterates all refs that match the specified glob pattern. */ int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data); + int for_each_glob_ref_in(each_ref_fn fn, const char *pattern, const char *prefix, void *cb_data); @@ -791,6 +807,41 @@ int reflog_expire(const char *refname, const struct object_id *oid, int ref_storage_backend_exists(const char *name); struct ref_store *get_main_ref_store(struct repository *r); + +/** + * Submodules + * ---------- + * + * If you want to iterate the refs of a submodule you first need to add the + * submodules object database. You can do this by a code-snippet like + * this: + * + * const char *path = "path/to/submodule" + * if (add_submodule_odb(path)) + * die("Error submodule '%s' not populated.", path); + * + * `add_submodule_odb()` will return zero on success. If you + * do not do this you will get an error for each ref that it does not point + * to a valid object. + * + * Note: As a side-effect of this you cannot safely assume that all + * objects you lookup are available in superproject. All submodule objects + * will be available the same way as the superprojects objects. + * + * Example: + * -------- + * + * ---- + * static int handle_remote_ref(const char *refname, + * const unsigned char *sha1, int flags, void *cb_data) + * { + * struct strbuf *output = cb_data; + * strbuf_addf(output, "%s\n", refname); + * return 0; + * } + * + */ + /* * Return the ref_store instance for the specified submodule. For the * main repository, use submodule==NULL; such a call cannot fail. For