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8587ead78a
When we pull the user's name from the GECOS field of the passwd file (or generate an email address based on their username and hostname), we put the result into a static buffer. While it's extremely unlikely that anybody ever hit these limits (after all, in such a case their parents must have hated them), we still had to deal with the error cases in our code. Converting these static buffers to strbufs lets us simplify the code and drop some error messages from the documentation that have confused some users. The conversion is mostly mechanical: replace string copies with strbuf equivalents, and access the strbuf.buf directly. There are a few exceptions: - copy_gecos and copy_email are the big winners in code reduction (since they no longer have to manage the string length manually) - git_ident_config wants to replace old versions of the default name (e.g., if we read the config multiple times), so it must reset+add to the strbuf instead of just adding Note that there is still one length limitation: the gethostname interface requires us to provide a static buffer, so we arbitrarily choose 1024 bytes for the hostname. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
112 lines
2.8 KiB
Plaintext
112 lines
2.8 KiB
Plaintext
git-commit-tree(1)
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==================
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NAME
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----
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git-commit-tree - Create a new commit object
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SYNOPSIS
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--------
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[verse]
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'git commit-tree' <tree> [(-p <parent>)...] < changelog
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'git commit-tree' [(-p <parent>)...] [(-m <message>)...] [(-F <file>)...] <tree>
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DESCRIPTION
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-----------
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This is usually not what an end user wants to run directly. See
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linkgit:git-commit[1] instead.
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Creates a new commit object based on the provided tree object and
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emits the new commit object id on stdout. The log message is read
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from the standard input, unless `-m` or `-F` options are given.
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A commit object may have any number of parents. With exactly one
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parent, it is an ordinary commit. Having more than one parent makes
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the commit a merge between several lines of history. Initial (root)
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commits have no parents.
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While a tree represents a particular directory state of a working
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directory, a commit represents that state in "time", and explains how
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to get there.
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Normally a commit would identify a new "HEAD" state, and while git
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doesn't care where you save the note about that state, in practice we
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tend to just write the result to the file that is pointed at by
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`.git/HEAD`, so that we can always see what the last committed
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state was.
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OPTIONS
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-------
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<tree>::
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An existing tree object
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-p <parent>::
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Each '-p' indicates the id of a parent commit object.
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-m <message>::
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A paragraph in the commig log message. This can be given more than
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once and each <message> becomes its own paragraph.
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-F <file>::
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Read the commit log message from the given file. Use `-` to read
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from the standard input.
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Commit Information
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------------------
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A commit encapsulates:
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- all parent object ids
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- author name, email and date
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- committer name and email and the commit time.
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While parent object ids are provided on the command line, author and
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committer information is taken from the following environment variables,
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if set:
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GIT_AUTHOR_NAME
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GIT_AUTHOR_EMAIL
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GIT_AUTHOR_DATE
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GIT_COMMITTER_NAME
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GIT_COMMITTER_EMAIL
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GIT_COMMITTER_DATE
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EMAIL
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(nb "<", ">" and "\n"s are stripped)
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In case (some of) these environment variables are not set, the information
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is taken from the configuration items user.name and user.email, or, if not
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present, system user name and the hostname used for outgoing mail (taken
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from `/etc/mailname` and falling back to the fully qualified hostname when
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that file does not exist).
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A commit comment is read from stdin. If a changelog
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entry is not provided via "<" redirection, 'git commit-tree' will just wait
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for one to be entered and terminated with ^D.
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include::date-formats.txt[]
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Diagnostics
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-----------
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You don't exist. Go away!::
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The passwd(5) gecos field couldn't be read
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Discussion
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----------
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include::i18n.txt[]
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FILES
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-----
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/etc/mailname
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SEE ALSO
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--------
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linkgit:git-write-tree[1]
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GIT
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---
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Part of the linkgit:git[1] suite
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