[PATCH v4] [GSOC] pretty: provide human date format

["ZheNing Hu via GitGitGadget" <gitgitgadget@gmail.com>]

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 v3: Fix format errors.

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-939%2Fadlternative%2Fpretty_human-v4
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-939/adlternative/pretty_human-v4
Pull-Request: https://github.com/gitgitgadget/git/pull/939

Range-diff vs v3:

 1:  67c57d8f4a17 ! 1:  8e5ae0d9a01e [GSOC] pretty: provide human date format
     @@ 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
     ++'%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.


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

diff --git a/Documentation/pretty-formats.txt b/Documentation/pretty-formats.txt
index 45133066e412..58bb2795284d 100644
--- a/Documentation/pretty-formats.txt
+++ b/Documentation/pretty-formats.txt
@@ -190,6 +190,8 @@ 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:git-rev-list[1])
 '%cn':: committer name
 '%cN':: committer name (respecting .mailmap, see
 	linkgit:git-shortlog[1] or linkgit:git-blame[1])
@@ -206,6 +208,8 @@ 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: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
diff --git a/pretty.c b/pretty.c
index e5b33ba034bd..b1ecd039cef2 100644
--- a/pretty.c
+++ b/pretty.c
@@ -745,6 +745,9 @@ static size_t format_person_part(struct strbuf *sb, char part,
 	case 'I':	/* date, ISO 8601 strict */
 		strbuf_addstr(sb, show_ident_date(&s, DATE_MODE(ISO8601_STRICT)));
 		return placeholder_len;
+	case 'h':	/* date, human */
+		strbuf_addstr(sb, show_ident_date(&s, DATE_MODE(HUMAN)));
+		return placeholder_len;
 	case 's':
 		strbuf_addstr(sb, show_ident_date(&s, DATE_MODE(SHORT)));
 		return placeholder_len;
diff --git a/t/t4205-log-pretty-formats.sh b/t/t4205-log-pretty-formats.sh
index cabdf7d57a00..10d511ba7307 100755
--- a/t/t4205-log-pretty-formats.sh
+++ b/t/t4205-log-pretty-formats.sh
@@ -539,6 +539,12 @@ test_expect_success 'short date' '
 	test_cmp expected actual
 '
 
+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
+'
+
 # get new digests (with no abbreviations)
 test_expect_success 'set up log decoration tests' '
 	head1=$(git rev-parse --verify HEAD~0) &&

base-commit: b0c09ab8796fb736efa432b8e817334f3e5ee75a
-- 
gitgitgadget