UpdateController/git_helpers

276 lines
8.7 KiB
Bash
Executable File

#!/bin/bash
# set -x
source ./log_helpers
source ./general_utils
# if [ ${git_helpers_sourced:-1} = "1" ]; then
# readonly git_helpers_sourced=${BASH_SOURCE[0]}
readonly repository_already_up_to_date=2
#
exec_git_command () {
local func="${FUNCNAME[0]}"
log_debug "$func:${LINENO} exec-ing [$*]"
local __git_result=$(exec_process_substitution $*)
log_debug "$func:${LINENO} result=$__git_result"
printf '%s' "$__git_result"
}
#
latest_commit () {
local func="${FUNCNAME[0]}"
# git reflog -> 46c5896 HEAD@{0}: commit: Made update_helpers executable
local c=$(git reflog | grep "HEAD@{0}" | cut -d" " -f1)
if ! [ -z "$c" ]; then
if grep -qE "^[[:xdigit:]]{6,}$" <<< $c; then
log_debug "$func:${LINENO} commit -> $c"
printf "%s\n" "$c"
else
log_crit "$func:${LINENO} wrong format for commit c=$c"
fi
else
log_crit "$func:${LINENO} 'git reflog' result empty"
fi
}
# fallback if something went wrong: revert to last valid commit
revert_to_commit_before_pull () {
local func="${FUNCNAME[0]}"
if ! [ -z "$commit_before_pull" ]; then
if grep -qE "^[[:xdigit:]]{6,}$" <<< $commit_before_pull; then
`git reset --hard "$commit_before_pull"`
if [ $? -eq 0 ]; then
log_info "$func: git reset --hard $commit_before_pull"
return 0
fi
log_crit "$func: 'git reset --hard $commit_before_pull' failed!"
fi
log_crit "$func: wrong format for commit_before_pull"
fi
log_crit "$func: empty commit_before_pull"
return 1
}
# revert_to_commit_before_pull
# clone the customer repository in ./workspace.
# this is done only once.
#
# Cloning into 'customer_281'...
# remote: Enumerating objects: 1087, done.
# remote: Counting objects: 100% (1087/1087), done.
# remote: Compressing objects: 100% (946/946), done.
# remote: Total 1087 (delta 404), reused 0 (delta 0), pack-reused 0
# Receiving objects: 100% (1087/1087), 103.27 KiB | 873.00 KiB/s, done.
# Resoving deltas: 100% (410/410), done.
#
clone_customer_repository () {
local func="${FUNCNAME[0]}"
if [ "$PWD" = "$WORKING_DIRECTORY" ]; then
if ! [[ -d "./$WORKSPACE_DIR" ]]; then
{ mkdir -p ./$WORKSPACE_DIR; }
fi
# check if the directory is empty. If so, clone the
# customer repository
if ! find ./$WORKSPACE_DIR -mindepth 1 -maxdepth 1 | read; then
log_debug "$func:${LINENO} cloning ${1} ..."
if cd "./$WORKSPACE_DIR"
then
$(exec_git_command git clone "$1")
if [ $? -eq 0 ]; then
CLONE_CUSTOMER_REPOSITORY=true
log_debug "$func:${LINENO} cloning ${1} done"
cd - ; return 0
fi
cd -
fi
else
# the directory is not empty, so we assume the
# customer-repository has been cloned already
if ! [[ -d "./${WORKSPACE_DIR}/$CUSTOMER_ID" ]]; then
log_fatal "$func:${LINENO} $PWD $WORKSPACE_DIR/$CUSTOMER_ID"\
"wrong repository: $(ls -d './${WORKSPACE_DIR}/*')"
else
local __m="./${WORKSPACE_DIR}/$CUSTOMER_ID exists"
log_debug "$func:${LINENO} $__m"
return 0
fi
fi
fi
update_psa_clone_error # message to ISMAS
return $?
}
# clone_customer_repository ->
# https://git.mimbach49.de/GerhardHoffmann/customer_281.git
cd_customer_repository () {
local func="${FUNCNAME[0]}"
# has to be called in WORKING_DIRECTORY
if [ "$PWD" = "${WORKING_DIRECTORY}" ]; then
repository_dir="./$WORKSPACE_DIR/$CUSTOMER_ID"
if ! [[ -d "$repository_dir" ]]; then
log_crit "$func:${LINENO}: $repository_dir does not exist!"
return 1
fi
if ! { cd $repository_dir; } ; then
log_crit "$func:${LINENO}: cannot cd to $repository_dir!"
return 1
fi
log_debug "$func:${LINENO}: cd to $repository_dir!"
return 0
fi
return 1
}
cd_home () {
if cd - &>/dev/null ; then
return 0
fi
return 1
}
pull_customer_repository () {
local func="${FUNCNAME[0]}"
if ! cd_customer_repository ; then
return 1
fi
local commit_before_pull=$(latest_commit)
if [ -z $commit_before_pull ]; then
cd_home ; return 1
fi
log_debug "$func:${LINENO}: commit_before_pull=$commit_before_pull"
local git_result=$(exec_git_command 'git pull')
if [ -z "$git_result" ]; then
log_warn "$func:${LINENO}: git result empty" ; cd_home;
return 1
fi
# see https://www.gnu.org/
# software/bash/manual/html_node/Shell-Parameter-Expansion.html
# [...]
#
# ${parameter//pattern/string}
#
# If there are two slashes separating parameter and pattern (...),
# all matches of pattern are replaced with string.
#
# If the expansion of string is null, matches of pattern are deleted.
# [...]
git_result=${git_result//[$'\r\n\t']/ }
log_debug "$func:${LINENO} git-pull-result=${git_result}"
if grep -qE "^Already\s+\up\s+\to\s+date.*$" <<< "$git_result"; then
log_warn "$func:${LINENO}: repository $PWD already up to date."
read $1 <<< 'yes'
cd_home ; return 1
fi
local commit_after_pull=$(latest_commit)
if [ -z $commit_after_pull ]; then
cd_home ; return 1
fi
log_debug "$func:${LINENO}: commit_after_pull=$commit_after_pull"
# Note: # 'git pull' is a 'git fetch' followed by a 'git merge'.
# Here's the fetch portion:
#
# remote: Counting objects: 11, done.
# remote: Compressing objects: 100% (5/5), done.
# remote: Total 7 (delta 2), reused 0 (delta 0)
#
# At this point, you've told the remote what you want.
# It finds all the objects it needs to give you,
# compresses them for faster transfer over the network,
# and then reports what it's sending you.
#
# Unpacking objects: 100% (7/7), done.
#
# You receive the pack (set of compressed objects) and unpack it.
#
# From ssh://my.remote.host.com/~/git/myproject
# * branch master -> FETCH_HEAD
# You've fetched the branch 'master' from the given remote;
# the ref FETCH_HEAD now points to it.
# Now we move on to the merge - precisely, git will merge
# FETCH_HEAD (the remote's master branch) into your current branch
# (presumably master).
#
#######################################################################
# here starts "message"
#
# Updating 9d447d2..f74fb21
# Fast forward
#
# It turns out that you haven't diverged from the remote's master branch,
# so the merge is a fast-forward (a trivial merge where it simply moves
# you forward in the history).
#
# Git notes the original position of your master branch (9d447d2)
# and the new position (f74fb21) it's been fast-forwarded to.
# If you had diverged from the remote's master branch,
# you'd see the output of a recursive merge here - Merge made
# by recursive, possibly along with some Auto-merged <file>
# and (oh no!) merge conflicts!
#
# szeged/1/1/etc/psa_config/device.conf | 13 +++++++------
# szeged/update.conf | 2 +-
# 2 files changed, 8 insertions(+), 7 deletions(-)
#
# Finally, it shows you the diffstat between the original and post-merge
# position of your master branch;
# this is basically what you'd get from
#
# git diff --stat master@{1} master.
#
update_commit="${commit_before_pull}..${commit_after_pull}"
if ! grep -qE ".*Updating\s+${update_commit}.*?" <<< $git_result; then
log_crit "$func:${LINENO}: no $update_commit in [ $git_result ]"
cd_home ; return 1
fi
cd_home ; return 0
}
# pull_customer_repository customer_281
changed_file_names () {
local func="${FUNCNAME[0]}"
if cd_customer_repository ; then
local git_res=$(exec_git_command 'git diff --stat master@{1} master')
git_res=${git_res//[$'\r\n\t']/ }
log_debug "$func:${LINENO}: git_res=$git_res"
local file_names=""
for f in ${KNOWN_FILES[@]} ; do
if grep -qE ".*\s+${f}\s+.*" <<< $git_res; then
if ! [ -z $file_names ]; then
file_names="$f $file_names"
else
file_names="$f"
fi
fi
done
cd_home; log_debug "$func:${LINENO}: file_names=$file_names" ;
printf '%s' "$file_names"
else
log_crit "$func:${LINENO}: cannot cd to $customer_repository "\
"while in $PWD"
fi
}
# fi