Add a --follow-symlinks option that'll resolve symlinks to their
targets when the target is of the form <rev>:<path>.
Without it, git will show the path of the link itself if the symlink
is the leaf node of <path>, or otherwise an error if some component
of <path> is a symlink to another location in the repository. With
the new --follow-symlinks option both will be resolved to their
target, and its content shown instead.
Signed-off-by: Michael Vogt <mvo@xxxxxxxxxx>
---
Documentation/git-show.txt | 7 +++++++
builtin/log.c | 6 +++++-
revision.c | 2 ++
revision.h | 1 +
t/t1800-git-show.sh | 41 ++++++++++++++++++++++++++++++++++++++
5 files changed, 56 insertions(+), 1 deletion(-)
create mode 100755 t/t1800-git-show.sh
diff --git a/Documentation/git-show.txt b/Documentation/git-show.txt
index e73ef5401..e2634b27e 100644
--- a/Documentation/git-show.txt
+++ b/Documentation/git-show.txt
@@ -39,6 +39,13 @@ OPTIONS
For a more complete list of ways to spell object names, see
"SPECIFYING REVISIONS" section in linkgit:gitrevisions[7].
+--follow-symlinks::
+ Follow symlinks inside the repository when requesting objects
+ in extended revision syntax of the form tree-ish:path-in-tree.
+ It will resolve any symlinks in <path-in-tree> and shows the
+ content of the link if the symlink is the leaf node of
+ <path-in-tree>.
+
include::pretty-options.txt[]
diff --git a/builtin/log.c b/builtin/log.c
index 94ee177d5..7d815b8ea 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -142,7 +142,7 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
struct rev_info *rev, struct setup_revision_opt *opt)
{
struct userformat_want w;
- int quiet = 0, source = 0, mailmap = 0;
+ int quiet = 0, source = 0, mailmap = 0, follow_symlinks = 0;
static struct line_opt_callback_data line_cb = {NULL, NULL, STRING_LIST_INIT_DUP};
static struct string_list decorate_refs_exclude = STRING_LIST_INIT_NODUP;
static struct string_list decorate_refs_include = STRING_LIST_INIT_NODUP;
@@ -162,6 +162,8 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
OPT_CALLBACK('L', NULL, &line_cb, "n,m:file",
N_("Process line range n,m in file, counting from 1"),
log_line_range_callback),
+ OPT_BOOL(0, "follow-symlinks", &follow_symlinks,
+ N_("follow in-tree symlinks (used when showing file content)")),
OPT_END()
};
@@ -176,6 +178,8 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
if (quiet)
rev->diffopt.output_format |= DIFF_FORMAT_NO_OUTPUT;
+ if (follow_symlinks)
+ rev->follow_symlinks = 1;
argc = setup_revisions(argc, argv, rev, opt);
/* Any arguments at this point are not recognized */
diff --git a/revision.c b/revision.c
index b42c836d7..4ab22313f 100644
--- a/revision.c
+++ b/revision.c
@@ -1678,6 +1678,8 @@ int handle_revision_arg(const char *arg_, struct rev_info *revs, int flags, unsi
if (revarg_opt & REVARG_COMMITTISH)
get_sha1_flags |= GET_OID_COMMITTISH;
+ if (revs && revs->follow_symlinks)
+ get_sha1_flags |= GET_OID_FOLLOW_SYMLINKS;
if (get_oid_with_context(arg, get_sha1_flags, &oid, &oc))
return revs->ignore_missing ? 0 : -1;
diff --git a/revision.h b/revision.h
index b8c47b98e..060f1038a 100644
--- a/revision.h
+++ b/revision.h
@@ -122,6 +122,7 @@ struct rev_info {
first_parent_only:1,
line_level_traverse:1,
tree_blobs_in_commit_order:1,
+ follow_symlinks:1,
/* for internal use only */
exclude_promisor_objects:1;
diff --git a/t/t1800-git-show.sh b/t/t1800-git-show.sh
new file mode 100755
index 000000000..7a02438ec
--- /dev/null
+++ b/t/t1800-git-show.sh
@@ -0,0 +1,41 @@
+#!/bin/sh
+
+test_description='Test git show works'
+
+. ./test-lib.sh
+
+test_expect_success 'verify git show HEAD:foo works' '
+ test_commit A &&
+ git show HEAD:A.t >actual &&
+ echo A >expected &&
+ test_cmp expected actual
+'
+
+test_expect_success SYMLINKS 'verify git show HEAD:symlink shows symlink points to foo' '
+ ln -s A.t A.link &&
+ git add A.link &&
+ git commit -m"Added symlink to A.t" &&
+ git show HEAD:A.link >actual &&
+ printf "%s" A.t >expected &&
+ test_cmp expected actual
+'
+
+test_expect_success SYMLINKS 'verify git show --follow-symlinks HEAD:symlink shows foo' '
+ git show --follow-symlinks HEAD:A.link >actual &&
+ echo A >expected &&
+ test_cmp expected actual
+'
+
+test_expect_success SYMLINKS 'verify git show --follow-symlinks HEAD:symlink works with subdirs' '
+ mkdir dir &&
+ ln -s dir symlink-to-dir &&
+ test_commit dir/B &&
+ git add dir symlink-to-dir &&
+ git commit -m "add dir and symlink-to-dir" &&
+ test_must_fail git show HEAD:symlink-to-dir/B.t >actual &&
+ git show --follow-symlinks HEAD:symlink-to-dir/B.t >actual &&
+ echo dir/B >expected &&
+ test_cmp expected actual
+'
+
+test_done
--
2.17.0
