begin extensions: add some extensions

Author: varhub

bin/git-amend-date

@@ -0,0 +1,30 @@
+#!/bin/sh
+
+# Change the commit and author date of last git commit (ammend).
+# Usage: git ammend-date <commit date> [author date]
+#
+
+_COMMIT_DATE="${1-}"
+_AUTHOR_DATE="${2-}"
+
+if test -z "$_COMMIT_DATE"; then
+    echo "Commit date not set." >&2
+    exit 1
+fi
+
+GIT_COMMITTER_DATE="$_COMMIT_DATE"
+
+if test -n "$_AUTHOR_DATE"; then
+	GIT_AUTHOR_DATE="$_AUTHOR_DATE"
+else
+	GIT_AUTHOR_DATE="$_COMMIT_DATE"
+fi
+
+export GIT_COMMITTER_DATE
+export GIT_AUTHOR_DATE
+
+git commit --amend --date "$GIT_AUTHOR_DATE"
+
+unset GIT_COMMITTER_DATE
+unset GIT_AUTHOR_DATE
+

bin/git-logmerges

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+git log --graph --full-history --merges --color --pretty=tformat:"%x1b[31m%h%x09%x1b[0m%ad%x09%x1b[32m%d%x1b[0m%x20%s%x20%x1b[33m(%an)%x1b[0m" --date=short | grep '^\*'

bin/git-rewrite-date

@@ -0,0 +1,57 @@
+#!/bin/sh
+
+#
+# Change the commit and/or author date of git commits.
+#
+# rewrite-date [-f] commit-to-change [branch-to-rewrite [commit-date [author-date]]]
+#
+#     If -f is supplied it is passed to "git filter-branch".
+#
+#     If <branch-to-rewrite> is not provided or is empty HEAD will be used.
+#     Use "--all" or a space separated list (e.g. "master next") to rewrite
+#     multiple branches.
+#
+
+# Based on http://stackoverflow.com/questions/3042437/change-commit-author-at-one-specific-commit
+
+force=''
+if test "x$1" = "x-f"; then
+    force='-f'
+    shift
+fi
+
+die() {
+    printf '%s\n' "$@"
+    exit 128
+}
+targ="$(git rev-parse --verify "$1" 2>/dev/null)" || die "$1 is not a commit"
+br="${2:-HEAD}"
+
+TARG_COMMIT="$targ"
+TARG_COMMIT_DATE="${3-}"
+TARG_AUTHOR_DATE="${4-}"
+
+export TARG_COMMIT TARG_COMMIT_DATE TARG_AUTHOR_DATE
+
+if test -z "$TARG_COMMIT_DATE"; then
+    echo "Commit date not set."
+    exit 1
+fi
+
+filt='
+    if test "$GIT_COMMIT" = "$TARG_COMMIT"; then
+        GIT_COMMITTER_DATE="$TARG_COMMIT_DATE"
+        export GIT_COMMITTER_DATE
+
+        if test -n "$TARG_AUTHOR_DATE"; then
+            GIT_AUTHOR_DATE="$TARG_AUTHOR_DATE"
+        else
+            GIT_AUTHOR_DATE="$TARG_COMMIT_DATE"
+        fi
+        export GIT_AUTHOR_DATE
+    fi
+
+'
+
+git filter-branch $force --env-filter "$filt" -- $br
+