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Add a test for the *.txt and *.c output assertions which asserts that
for "-h" lines that aren't the "usage: " or " or: " lines they start
with the same amount of whitespace. This ensures that we won't have
buggy output like:
[...]
or: git tag [-n[<num>]]
[...]
[--create-reflog] [...]
Which should instead be like this, i.e. the options lines should be
aligned:
[...]
or: git tag [-n[<num>]]
[...]
[--create-reflog] [...]
It would be better to be able to use "test_cmp" here, i.e. to
construct the output we expect, and compare it against the actual
output.
For most built-in commands this would be rather straightforward. In
"t0450-txt-doc-vs-help.sh" we already compute the whitespace that a
"git-$builtin" needs, and strip away "usage: " or " or: " from the
start of lines. The problem is:
* For commands that implement subcommands, such as "git bundle", we
don't know whether e.g. "git bundle create" is the subcommand
"create", or the argument "create" to "bundle" for the purposes of
alignment.
We *do* have that information from the *.txt version, since the
part within the ''-quotes should be the command & subcommand, but
that isn't consistent (e.g. see "git bundle" and "git
commit-graph", only the latter is correct), and parsing that out
would be non-trivial.
* If we were to make this stricter we have various
non-parse_options() users (e.g. "git diff-tree") that don't have the
nicely aligned output which we've had since
4631cfc20bd (parse-options: properly align continued usage output,
2021-09-21).
So rather than make perfect the enemy of the good let's assert that
for those lines that are indented they should all use the same
indentation.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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There's been a lot of incremental effort to make the SYNOPSIS output
in our documentation consistent with the -h output,
e.g. cbe485298bf (git reflog [expire|delete]: make -h output
consistent with SYNOPSIS, 2022-03-17) is one recent example, but that
effort has been an uphill battle due to the lack of regression
testing.
This adds such regression testing, we can parse out the SYNOPSIS
output with "sed", and it turns out it's relatively easy to normalize
it and the "-h" output to match on another.
We now ensure that we won't have regressions when it comes to the list
of commands in "expect_help_to_match_txt" below, and in subsequent
commits we'll make more of them consistent.
The naïve parser here gets quite a few things wrong, but it doesn't
need to be perfect, just good enough that we can compare /some/ of
this help output. There's no cases where the output would match except
for the parser's stupidity, it's all cases of e.g. comparing the *.txt
to non-parse_options() output.
Since that output is wildly different than the *.txt anyway let's
leave this for now, we can fix the parser some other time, or it won't
become necessary as we'll e.g. convert more things to using
parse_options().
Having a special-case for "merge-tree"'s 1f0c3a29da3 (merge-tree:
implement real merges, 2022-06-18) is a bit ugly, but preferred to
blessing that " (deprecated)" pattern for other commands. We'd
probably want to add some other way of marking deprecated commands in
the SYNOPSIS syntax. Syntactically 1f0c3a29da3's way of doing it is
indistinguishable from the command taking an optional literal
"deprecated" string as an argument.
Some of the issues that are left:
* "git show -h", "git whatchanged -h" and "git reflog --oneline -h"
all showing "git log" and "git show" usage output. I.e. the
"builtin_log_usage" in builtin/log.c doesn't take into account what
command we're running.
* Commands which implement subcommands such as like
"multi-pack-index", "notes", "remote" etc. having their subcommands
in a very different order in the *.txt and *.c. Fixing it would
require some verbose diffs, so it's been left alone for now.
* Commands such as "format-patch" have a very long argument list in
the *.txt, but just "[<options>]" in the *.c.
What to do about these has been left out of this series, except to
the extent that preceding commits changed "[<options>]" (or
equivalent) to the list of options in cases where that list of
options was tiny, or we clearly meant to exhaustively list the
options in both *.txt and *.c.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Change "builtin/credential-cache--daemon.c" to use "<socket-path>" not
"<socket_path>" in a placeholder label, almost all of our
documentation uses this form.
This is now consistent with the "If a placeholder has multiple words,
they are separated by dashes" guideline added in
9c9b4f2f8b7 (standardize usage info string format, 2015-01-13), let's
add a now-passing test to assert that that's the case.
To do this we need to introduce a very sed-powered parser to extract
the SYNOPSIS from the *.txt, and handle not all commands with "-h"
having a corresponding *.txt (e.g. "bisect--helper"). We'll still want
to handle syntax edge cases in the *.txt in subsequent commits for
other checks, but let's do that then.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Add a test to assert basic compliance with the CodingGuidelines in the
SYNOPSIS and builtin -h output. For now we only assert that the "-h"
output doesn't have "\t" characters, as a very basic syntax check.
Subsequent commits will expand on the checks here as various issues
are fixed, but let's first add the test scaffolding.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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