attr: add flag --source to work with tree-ish
The contents of the .gitattributes files may evolve over time, but "git check-attr" always checks attributes against them in the working tree and/or in the index. It may be beneficial to optionally allow the users to check attributes taken from a commit other than HEAD against paths. Add a new flag `--source` which will allow users to check the attributes against a commit (actually any tree-ish would do). When the user uses this flag, we go through the stack of .gitattributes files but instead of checking the current working tree and/or in the index, we check the blobs from the provided tree-ish object. This allows the command to also be used in bare repositories. Since we use a tree-ish object, the user can pass "--source HEAD:subdirectory" and all the attributes will be looked up as if subdirectory was the root directory of the repository. We cannot simply use the `<rev>:<path>` syntax without the `--source` flag, similar to how it is used in `git show` because any non-flag parameter before `--` is treated as an attribute and any parameter after `--` is treated as a pathname. The change involves creating a new function `read_attr_from_blob`, which given the path reads the blob for the path against the provided source and parses the attributes line by line. This function is plugged into `read_attr()` function wherein we go through the stack of attributes files. Signed-off-by: Karthik Nayak <karthik.188@gmail.com> Signed-off-by: Toon Claes <toon@iotcl.com> Co-authored-by: toon@iotcl.com Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Karthik Nayak
Junio C Hamano
parent
c847e8c228
commit
47cfc9bd7d
@ -9,8 +9,8 @@ git-check-attr - Display gitattributes information
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SYNOPSIS
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--------
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[verse]
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'git check-attr' [-a | --all | <attr>...] [--] <pathname>...
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'git check-attr' --stdin [-z] [-a | --all | <attr>...]
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'git check-attr' [--source <tree-ish>] [-a | --all | <attr>...] [--] <pathname>...
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'git check-attr' --stdin [-z] [--source <tree-ish>] [-a | --all | <attr>...]
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DESCRIPTION
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-----------
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@ -36,6 +36,11 @@ OPTIONS
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If `--stdin` is also given, input paths are separated
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with a NUL character instead of a linefeed character.
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--source=<tree-ish>::
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Check attributes against the specified tree-ish. It is common to
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specify the source tree by naming a commit, branch or tag associated
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with it.
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\--::
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Interpret all preceding arguments as attributes and all following
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arguments as path names.
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@ -120,7 +120,7 @@ static const struct attr_check *get_archive_attrs(struct index_state *istate,
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static struct attr_check *check;
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if (!check)
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check = attr_check_initl("export-ignore", "export-subst", NULL);
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git_check_attr(istate, path, check);
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git_check_attr(istate, NULL, path, check);
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return check;
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}
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95
attr.c
95
attr.c
@ -13,6 +13,8 @@
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#include "dir.h"
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#include "utf8.h"
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#include "quote.h"
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#include "revision.h"
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#include "object-store.h"
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#include "thread-utils.h"
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const char git_attr__true[] = "(builtin)true";
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@ -729,14 +731,62 @@ static struct attr_stack *read_attr_from_file(const char *path, unsigned flags)
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return res;
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}
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static struct attr_stack *read_attr_from_index(struct index_state *istate,
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const char *path,
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static struct attr_stack *read_attr_from_buf(char *buf, const char *path,
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unsigned flags)
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{
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struct attr_stack *res;
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char *buf, *sp;
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char *sp;
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int lineno = 0;
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if (!buf)
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return NULL;
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CALLOC_ARRAY(res, 1);
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for (sp = buf; *sp;) {
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char *ep;
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int more;
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ep = strchrnul(sp, '\n');
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more = (*ep == '\n');
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*ep = '\0';
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handle_attr_line(res, sp, path, ++lineno, flags);
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sp = ep + more;
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}
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free(buf);
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return res;
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}
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static struct attr_stack *read_attr_from_blob(struct index_state *istate,
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const struct object_id *tree_oid,
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const char *path, unsigned flags)
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{
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struct object_id oid;
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unsigned long sz;
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enum object_type type;
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void *buf;
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unsigned short mode;
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if (!tree_oid)
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return NULL;
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if (get_tree_entry(istate->repo, tree_oid, path, &oid, &mode))
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return NULL;
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buf = repo_read_object_file(istate->repo, &oid, &type, &sz);
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if (!buf || type != OBJ_BLOB) {
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free(buf);
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return NULL;
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}
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return read_attr_from_buf(buf, path, flags);
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}
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static struct attr_stack *read_attr_from_index(struct index_state *istate,
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const char *path, unsigned flags)
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{
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char *buf;
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if (!istate)
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return NULL;
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@ -758,28 +808,19 @@ static struct attr_stack *read_attr_from_index(struct index_state *istate,
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if (!buf)
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return NULL;
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CALLOC_ARRAY(res, 1);
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for (sp = buf; *sp; ) {
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char *ep;
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int more;
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ep = strchrnul(sp, '\n');
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more = (*ep == '\n');
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*ep = '\0';
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handle_attr_line(res, sp, path, ++lineno, flags);
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sp = ep + more;
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}
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free(buf);
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return res;
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return read_attr_from_buf(buf, path, flags);
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}
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static struct attr_stack *read_attr(struct index_state *istate,
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const struct object_id *tree_oid,
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const char *path, unsigned flags)
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{
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struct attr_stack *res = NULL;
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if (direction == GIT_ATTR_INDEX) {
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res = read_attr_from_index(istate, path, flags);
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} else if (tree_oid) {
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res = read_attr_from_blob(istate, tree_oid, path, flags);
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} else if (!is_bare_repository()) {
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if (direction == GIT_ATTR_CHECKOUT) {
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res = read_attr_from_index(istate, path, flags);
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@ -839,6 +880,7 @@ static void push_stack(struct attr_stack **attr_stack_p,
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}
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static void bootstrap_attr_stack(struct index_state *istate,
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const struct object_id *tree_oid,
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struct attr_stack **stack)
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{
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struct attr_stack *e;
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@ -864,7 +906,7 @@ static void bootstrap_attr_stack(struct index_state *istate,
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}
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/* root directory */
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e = read_attr(istate, GITATTRIBUTES_FILE, flags | READ_ATTR_NOFOLLOW);
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e = read_attr(istate, tree_oid, GITATTRIBUTES_FILE, flags | READ_ATTR_NOFOLLOW);
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push_stack(stack, e, xstrdup(""), 0);
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/* info frame */
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@ -878,6 +920,7 @@ static void bootstrap_attr_stack(struct index_state *istate,
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}
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static void prepare_attr_stack(struct index_state *istate,
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const struct object_id *tree_oid,
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const char *path, int dirlen,
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struct attr_stack **stack)
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{
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@ -899,7 +942,7 @@ static void prepare_attr_stack(struct index_state *istate,
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* .gitattributes in deeper directories to shallower ones,
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* and finally use the built-in set as the default.
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*/
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bootstrap_attr_stack(istate, stack);
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bootstrap_attr_stack(istate, tree_oid, stack);
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/*
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* Pop the "info" one that is always at the top of the stack.
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@ -954,7 +997,7 @@ static void prepare_attr_stack(struct index_state *istate,
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strbuf_add(&pathbuf, path + pathbuf.len, (len - pathbuf.len));
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strbuf_addf(&pathbuf, "/%s", GITATTRIBUTES_FILE);
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next = read_attr(istate, pathbuf.buf, READ_ATTR_NOFOLLOW);
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next = read_attr(istate, tree_oid, pathbuf.buf, READ_ATTR_NOFOLLOW);
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/* reset the pathbuf to not include "/.gitattributes" */
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strbuf_setlen(&pathbuf, len);
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@ -1074,8 +1117,8 @@ static void determine_macros(struct all_attrs_item *all_attrs,
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* Otherwise all attributes are collected.
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*/
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static void collect_some_attrs(struct index_state *istate,
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const char *path,
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struct attr_check *check)
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const struct object_id *tree_oid,
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const char *path, struct attr_check *check)
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{
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int pathlen, rem, dirlen;
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const char *cp, *last_slash = NULL;
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@ -1094,7 +1137,7 @@ static void collect_some_attrs(struct index_state *istate,
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dirlen = 0;
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}
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prepare_attr_stack(istate, path, dirlen, &check->stack);
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prepare_attr_stack(istate, tree_oid, path, dirlen, &check->stack);
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all_attrs_init(&g_attr_hashmap, check);
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determine_macros(check->all_attrs, check->stack);
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@ -1103,12 +1146,12 @@ static void collect_some_attrs(struct index_state *istate,
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}
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void git_check_attr(struct index_state *istate,
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const char *path,
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const struct object_id *tree_oid, const char *path,
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struct attr_check *check)
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{
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int i;
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collect_some_attrs(istate, path, check);
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collect_some_attrs(istate, tree_oid, path, check);
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for (i = 0; i < check->nr; i++) {
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size_t n = check->items[i].attr->attr_nr;
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@ -1119,13 +1162,13 @@ void git_check_attr(struct index_state *istate,
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}
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}
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void git_all_attrs(struct index_state *istate,
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void git_all_attrs(struct index_state *istate, const struct object_id *tree_oid,
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const char *path, struct attr_check *check)
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{
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int i;
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attr_check_reset(check);
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collect_some_attrs(istate, path, check);
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collect_some_attrs(istate, tree_oid, path, check);
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for (i = 0; i < check->all_attrs_nr; i++) {
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const char *name = check->all_attrs[i].attr->name;
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6
attr.h
6
attr.h
@ -108,6 +108,7 @@
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*/
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struct index_state;
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struct object_id;
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/**
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* An attribute is an opaque object that is identified by its name. Pass the
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@ -190,13 +191,14 @@ void attr_check_free(struct attr_check *check);
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const char *git_attr_name(const struct git_attr *);
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void git_check_attr(struct index_state *istate,
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const char *path, struct attr_check *check);
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const struct object_id *tree_oid, const char *path,
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struct attr_check *check);
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/*
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* Retrieve all attributes that apply to the specified path.
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* check holds the attributes and their values.
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*/
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void git_all_attrs(struct index_state *istate,
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void git_all_attrs(struct index_state *istate, const struct object_id *tree_oid,
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const char *path, struct attr_check *check);
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enum git_attr_direction {
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@ -9,9 +9,10 @@
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static int all_attrs;
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static int cached_attrs;
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static int stdin_paths;
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static char *source;
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static const char * const check_attr_usage[] = {
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N_("git check-attr [-a | --all | <attr>...] [--] <pathname>..."),
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N_("git check-attr --stdin [-z] [-a | --all | <attr>...]"),
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N_("git check-attr [--source <tree-ish>] [-a | --all | <attr>...] [--] <pathname>..."),
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N_("git check-attr --stdin [-z] [--source <tree-ish>] [-a | --all | <attr>...]"),
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NULL
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};
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@ -23,6 +24,7 @@ static const struct option check_attr_options[] = {
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OPT_BOOL(0 , "stdin", &stdin_paths, N_("read file names from stdin")),
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OPT_BOOL('z', NULL, &nul_term_line,
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N_("terminate input and output records by a NUL character")),
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OPT_STRING(0, "source", &source, N_("<tree-ish>"), N_("which tree-ish to check attributes at")),
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OPT_END()
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};
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@ -55,27 +57,26 @@ static void output_attr(struct attr_check *check, const char *file)
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}
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}
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static void check_attr(const char *prefix,
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struct attr_check *check,
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int collect_all,
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static void check_attr(const char *prefix, struct attr_check *check,
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const struct object_id *tree_oid, int collect_all,
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const char *file)
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{
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char *full_path =
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prefix_path(prefix, prefix ? strlen(prefix) : 0, file);
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if (collect_all) {
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git_all_attrs(&the_index, full_path, check);
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git_all_attrs(&the_index, tree_oid, full_path, check);
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} else {
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git_check_attr(&the_index, full_path, check);
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git_check_attr(&the_index, tree_oid, full_path, check);
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}
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output_attr(check, file);
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free(full_path);
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}
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static void check_attr_stdin_paths(const char *prefix,
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struct attr_check *check,
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int collect_all)
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static void check_attr_stdin_paths(const char *prefix, struct attr_check *check,
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const struct object_id *tree_oid, int collect_all)
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{
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struct strbuf buf = STRBUF_INIT;
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struct strbuf unquoted = STRBUF_INIT;
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@ -89,7 +90,7 @@ static void check_attr_stdin_paths(const char *prefix,
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die("line is badly quoted");
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strbuf_swap(&buf, &unquoted);
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}
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check_attr(prefix, check, collect_all, buf.buf);
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check_attr(prefix, check, tree_oid, collect_all, buf.buf);
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maybe_flush_or_die(stdout, "attribute to stdout");
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}
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strbuf_release(&buf);
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@ -105,6 +106,8 @@ static NORETURN void error_with_usage(const char *msg)
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int cmd_check_attr(int argc, const char **argv, const char *prefix)
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{
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struct attr_check *check;
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struct object_id *tree_oid = NULL;
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struct object_id initialized_oid;
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int cnt, i, doubledash, filei;
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if (!is_bare_repository())
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@ -176,11 +179,17 @@ int cmd_check_attr(int argc, const char **argv, const char *prefix)
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}
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}
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if (source) {
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if (repo_get_oid_tree(the_repository, source, &initialized_oid))
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die("%s: not a valid tree-ish source", source);
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tree_oid = &initialized_oid;
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}
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if (stdin_paths)
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check_attr_stdin_paths(prefix, check, all_attrs);
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check_attr_stdin_paths(prefix, check, tree_oid, all_attrs);
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else {
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for (i = filei; i < argc; i++)
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check_attr(prefix, check, all_attrs, argv[i]);
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check_attr(prefix, check, tree_oid, all_attrs, argv[i]);
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maybe_flush_or_die(stdout, "attribute to stdout");
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}
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@ -1318,7 +1318,7 @@ static int no_try_delta(const char *path)
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if (!check)
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check = attr_check_initl("delta", NULL);
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git_check_attr(the_repository->index, path, check);
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git_check_attr(the_repository->index, NULL, path, check);
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if (ATTR_FALSE(check->items[0].value))
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return 1;
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return 0;
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@ -1308,7 +1308,7 @@ void convert_attrs(struct index_state *istate,
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git_config(read_convert_config, NULL);
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}
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git_check_attr(istate, path, check);
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git_check_attr(istate, NULL, path, check);
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ccheck = check->items;
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ca->crlf_action = git_path_check_crlf(ccheck + 4);
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if (ca->crlf_action == CRLF_UNDEFINED)
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@ -391,7 +391,7 @@ enum ll_merge_result ll_merge(mmbuffer_t *result_buf,
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normalize_file(theirs, path, istate);
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}
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git_check_attr(istate, path, check);
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git_check_attr(istate, NULL, path, check);
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ll_driver_name = check->items[0].value;
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if (check->items[1].value) {
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marker_size = atoi(check->items[1].value);
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@ -419,7 +419,7 @@ int ll_merge_marker_size(struct index_state *istate, const char *path)
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if (!check)
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check = attr_check_initl("conflict-marker-size", NULL);
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git_check_attr(istate, path, check);
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git_check_attr(istate, NULL, path, check);
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if (check->items[0].value) {
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marker_size = atoi(check->items[0].value);
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if (marker_size <= 0)
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@ -732,7 +732,7 @@ int match_pathspec_attrs(struct index_state *istate,
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if (name[namelen])
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name = to_free = xmemdupz(name, namelen);
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git_check_attr(istate, name, item->attr_check);
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git_check_attr(istate, NULL, name, item->attr_check);
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free(to_free);
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@ -25,7 +25,15 @@ attr_check_quote () {
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git check-attr test -- "$path" >actual &&
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echo "\"$quoted_path\": test: $expect" >expect &&
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test_cmp expect actual
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}
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attr_check_source () {
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path="$1" expect="$2" source="$3" git_opts="$4" &&
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git $git_opts check-attr --source $source test -- "$path" >actual 2>err &&
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echo "$path: test: $expect" >expect &&
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test_cmp expect actual &&
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test_must_be_empty err
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}
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test_expect_success 'open-quoted pathname' '
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@ -33,7 +41,6 @@ test_expect_success 'open-quoted pathname' '
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attr_check a unspecified
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'
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||||
test_expect_success 'setup' '
|
||||
mkdir -p a/b/d a/c b &&
|
||||
(
|
||||
@ -80,12 +87,23 @@ test_expect_success 'setup' '
|
||||
EOF
|
||||
'
|
||||
|
||||
test_expect_success 'setup branches' '
|
||||
mkdir -p foo/bar &&
|
||||
test_commit --printf "add .gitattributes" foo/bar/.gitattributes \
|
||||
"f test=f\na/i test=n\n" tag-1 &&
|
||||
test_commit --printf "add .gitattributes" foo/bar/.gitattributes \
|
||||
"g test=g\na/i test=m\n" tag-2 &&
|
||||
rm foo/bar/.gitattributes
|
||||
'
|
||||
|
||||
test_expect_success 'command line checks' '
|
||||
test_must_fail git check-attr &&
|
||||
test_must_fail git check-attr -- &&
|
||||
test_must_fail git check-attr test &&
|
||||
test_must_fail git check-attr test -- &&
|
||||
test_must_fail git check-attr -- f &&
|
||||
test_must_fail git check-attr --source &&
|
||||
test_must_fail git check-attr --source not-a-valid-ref &&
|
||||
echo "f" | test_must_fail git check-attr --stdin &&
|
||||
echo "f" | test_must_fail git check-attr --stdin -- f &&
|
||||
echo "f" | test_must_fail git check-attr --stdin test -- f &&
|
||||
@ -287,6 +305,15 @@ test_expect_success 'using --git-dir and --work-tree' '
|
||||
)
|
||||
'
|
||||
|
||||
test_expect_success 'using --source' '
|
||||
attr_check_source foo/bar/f f tag-1 &&
|
||||
attr_check_source foo/bar/a/i n tag-1 &&
|
||||
attr_check_source foo/bar/f unspecified tag-2 &&
|
||||
attr_check_source foo/bar/a/i m tag-2 &&
|
||||
attr_check_source foo/bar/g g tag-2 &&
|
||||
attr_check_source foo/bar/g unspecified tag-1
|
||||
'
|
||||
|
||||
test_expect_success 'setup bare' '
|
||||
git clone --template= --bare . bare.git
|
||||
'
|
||||
@ -306,6 +333,18 @@ test_expect_success 'bare repository: check that .gitattribute is ignored' '
|
||||
)
|
||||
'
|
||||
|
||||
test_expect_success 'bare repository: with --source' '
|
||||
(
|
||||
cd bare.git &&
|
||||
attr_check_source foo/bar/f f tag-1 &&
|
||||
attr_check_source foo/bar/a/i n tag-1 &&
|
||||
attr_check_source foo/bar/f unspecified tag-2 &&
|
||||
attr_check_source foo/bar/a/i m tag-2 &&
|
||||
attr_check_source foo/bar/g g tag-2 &&
|
||||
attr_check_source foo/bar/g unspecified tag-1
|
||||
)
|
||||
'
|
||||
|
||||
test_expect_success 'bare repository: check that --cached honors index' '
|
||||
(
|
||||
cd bare.git &&
|
||||
|
||||
@ -413,7 +413,7 @@ struct userdiff_driver *userdiff_find_by_path(struct index_state *istate,
|
||||
check = attr_check_initl("diff", NULL);
|
||||
if (!path)
|
||||
return NULL;
|
||||
git_check_attr(istate, path, check);
|
||||
git_check_attr(istate, NULL, path, check);
|
||||
|
||||
if (ATTR_TRUE(check->items[0].value))
|
||||
return &driver_true;
|
||||
|
||||
2
ws.c
2
ws.c
@ -78,7 +78,7 @@ unsigned whitespace_rule(struct index_state *istate, const char *pathname)
|
||||
if (!attr_whitespace_rule)
|
||||
attr_whitespace_rule = attr_check_initl("whitespace", NULL);
|
||||
|
||||
git_check_attr(istate, pathname, attr_whitespace_rule);
|
||||
git_check_attr(istate, NULL, pathname, attr_whitespace_rule);
|
||||
value = attr_whitespace_rule->items[0].value;
|
||||
if (ATTR_TRUE(value)) {
|
||||
/* true (whitespace) */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user