[PATCH v3] [GSOC] pretty: provide human date format

From: ZheNing Hu <adlternative@gmail.com>

Add the placeholders %ah and %ch to format author date and committer date, like --date=human does, which provides more humanity date output.

Signed-off-by: ZheNing Hu <adlternative@gmail.com>
---
    [GSOC] pretty: provide human date format
    
    Reasons for making this patch: --date=human has no corresponding
    --pretty option.
    
    Although --date=human with --pretty="%(a|c)d" can achieve the same
    effect with --pretty="%(a|c)h", but it can be noticed that most time
    formats implement the corresponding option of --pretty, such as
    --date=iso8601 can be replaced by --pretty=%(a|c)i, so add
    --pretty=%(a|c)h seems to be a very reasonable thing.
    
    Change from v2: change %(a|c)h link to git-rev-list and change to more
    suitable test title.

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-939%2Fadlternative%2Fpretty_human-v3
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-939/adlternative/pretty_human-v3
Pull-Request: https://github.com/gitgitgadget/git/pull/939

Range-diff vs v2:

 1:  1517708876b5 ! 1:  67c57d8f4a17 [GSOC] pretty: provide human date format
     @@ Documentation/pretty-formats.txt: The placeholders are:
       '%ai':: author date, ISO 8601-like format
       '%aI':: author date, strict ISO 8601 format
       '%as':: author date, short format (`YYYY-MM-DD`)
     -+'%ah':: author date, human style (like the --date=human option of
     -+	linkgit:rev-list-options.txt[1])
     ++'%ah':: author date, human style (like the `--date=human` option of
     ++	linkgit:git-rev-list[1])
       '%cn':: committer name
       '%cN':: committer name (respecting .mailmap, see
       	linkgit:git-shortlog[1] or linkgit:git-blame[1])
     @@ Documentation/pretty-formats.txt: The placeholders are:
       '%ci':: committer date, ISO 8601-like format
       '%cI':: committer date, strict ISO 8601 format
       '%cs':: committer date, short format (`YYYY-MM-DD`)
     -+'%ch':: committer date, human style(like the --date=human option of
     -+	linkgit:rev-list-options.txt[1])
     ++'%ch':: committer date, human style(like the `--date=human` option of
     ++	linkgit:git-rev-list[1])
       '%d':: ref names, like the --decorate option of linkgit:git-log[1]
       '%D':: ref names without the " (", ")" wrapping.
       '%(describe[:options])':: human-readable name, like
     @@ t/t4205-log-pretty-formats.sh: test_expect_success 'short date' '
       	test_cmp expected actual
       '
       
     -+test_expect_success 'human date' '
     ++test_expect_success '--date=human %ad%cd is the same as %ah%ch' '
      +	git log --format=%ad%n%cd --date=human >expected &&
      +	git log --format=%ah%n%ch >actual &&
      +	test_cmp expected actual

 Documentation/pretty-formats.txt | 4 ++++
 pretty.c                         | 3 +++
 t/t4205-log-pretty-formats.sh    | 6 ++++++
 3 files changed, 13 insertions(+)