[PATCH v4 0/2] for-each-repo: new command for multi-repo operations

Changes since v3:
* option -x used to execute non-git commands
* option -z used to NUL-terminate paths
* write_name_quoted() used to print repo paths
* repos are handled in sorted order (as defined by strcmp(3)) to get
  predictable output from the command
* unsetenv() reintroduced to avoid problems from GIT_DIR/WORK_TREE
* more tests

Lars Hjemli (2):
  for-each-repo: new command used for multi-repo operations
  git: rewrite `git -a` to become a git-for-each-repo command

 .gitignore                          |   1 +
 Documentation/git-for-each-repo.txt |  71 ++++++++++++
 Makefile                            |   1 +
 builtin.h                           |   1 +
 builtin/for-each-repo.c             | 145 ++++++++++++++++++++++++
 git.c                               |  37 +++++++
 t/t6400-for-each-repo.sh            | 213 ++++++++++++++++++++++++++++++++++++
 7 files changed, 469 insertions(+)
 create mode 100644 Documentation/git-for-each-repo.txt
 create mode 100644 builtin/for-each-repo.c
 create mode 100755 t/t6400-for-each-repo.sh