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