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ci: Comment tweaks in Makefile.ci

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Fix some typos and grammar (calling something safer and error-prone is
odd, and 'ther eneeds' is an obvious typo), and reflow some long
lines.

Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Eric Blake 2019-08-08 09:31:40 -05:00
parent 1eff313b10
commit d5ae44a9df
1 changed files with 21 additions and 17 deletions
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38
Makefile.ci
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@ -86,7 +86,7 @@ endif
# is liable to mess with SELinux labelling which will
# then prevent the host accessing them. And podman cannot
# relabel the files due to it running rootless. So
# copying them first is safer and error-prone.
# copying them first is safer and less error-prone.
CI_PWDB_MOUNTS = \
--volume $(CI_SCRATCHDIR)/group:/etc/group:ro,z \
--volume $(CI_SCRATCHDIR)/passwd:/etc/passwd:ro,z \
@ -98,22 +98,26 @@ CI_PWDB_MOUNTS = \
CI_ULIMIT_FILES = 1024
ifeq ($(CI_ENGINE),podman)
# Podman cannot reuse host namespace when running non-root containers. Until
# support for --keep-uid is added we can just create another mapping that will
# do that for us. Beware, that in {uid,git}map=container_id:host_id:range,
# the host_id does actually refer to the uid in the first mapping where 0
# (root) is mapped to the current user and rest is offset.
# In order to set up this mapping, we need to keep all the user IDs to prevent
# possible errors as some images might expect UIDs up to 90000 (looking at you
# fedora), so we don't want the overflowuid to be used for them. For mapping
# all the other users properly ther eneeds to be some math done. Don't worry,
# it's just addition and subtraction.
# 65536 ought to be enough (tm), but for really rare cases the maximums might
# need to be higher, but that only happens when your /etc/sub{u,g}id allow
# users to have more IDs. Unless --keep-uid is supported, let's do this in a
# way that should work for everyone.
# Podman cannot reuse host namespace when running non-root
# containers. Until support for --keep-uid is added we can
# just create another mapping that will do that for us.
# Beware, that in {uid,git}map=container_id:host_id:range, the
# host_id does actually refer to the uid in the first mapping
# where 0 (root) is mapped to the current user and rest is
# offset.
#
# In order to set up this mapping, we need to keep all the
# user IDs to prevent possible errors as some images might
# expect UIDs up to 90000 (looking at you fedora), so we don't
# want the overflowuid to be used for them. For mapping all
# the other users properly, some math needs to be done.
# Don't worry, it's just addition and subtraction.
#
# 65536 ought to be enough (tm), but for really rare cases the
# maximums might need to be higher, but that only happens when
# your /etc/sub{u,g}id allow users to have more IDs. Unless
# --keep-uid is supported, let's do this in a way that should
# work for everyone.
CI_MAX_UID = $(shell sed -n "s/^$USER:[^:]\+://p" /etc/subuid)
CI_MAX_GID = $(shell sed -n "s/^$USER:[^:]\+://p" /etc/subgid)
ifeq ($(CI_MAX_UID),)