mirror of
https://github.com/schoebel/mars
synced 2024-12-18 04:34:48 +00:00
134 lines
3.9 KiB
Bash
Executable File
134 lines
3.9 KiB
Bash
Executable File
#!/bin/bash
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# Purpose:
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# Linux kernel upstream may change properties of build toolchains over the years.
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# MARS is currently downstream and/or out-of-tree.
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# Here we adapt ourselves to the kernel upstream.
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# This method should also ease the removal of legacy code from MARS,
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# as far as possible, when combined with some old kernels.
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# Hopefully, this can help in becoming upstream.
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#
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# We make some reorg git commits.
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# In order to ease "git rebase" and siblings, we make separate
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# commits for renames vs resurrections.
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# Resurrections are needed for compatibility with old kernels
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# and their old toolchains, when combined with old MARS versions.
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#
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# Our own previous intermediate versions are retained by default.
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#
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# Checking the resulting commits, and appending more commits is up to you.
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# When nothing will actually change, you can remove some of the (intermediate) commits.
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#
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# Adaptations of any pre-patches to newer kernels is also up to you.
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echo -n "Enter new version string with numbers (like 5.4) or press Ctrl-C: "
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read new_version
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shopt -s nullglob
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function cmp_version
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{
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local a="$1"
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local b="$2"
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if (( ${a%%.*} < ${b%%.*} )); then
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echo "-1"
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elif (( ${a%%.*} > ${b%%.*} )); then
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echo "1"
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elif [[ "$a" =~ \. ]] && [[ "$b" =~ \. ]]; then
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local a_short="$(echo "$a" | sed 's/^[0-9]*\.//')"
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local b_short="$(echo "$b" | sed 's/^[0-9]*\.//')"
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cmp_version "$a_short" "$b_short"
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elif [[ "$a" =~ \. ]]; then
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# only descend the version hierarchy of a
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local a_short="$(echo "$a" | sed 's/^[0-9]*\.//')"
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cmp_version "$a_short" "0"
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elif [[ "$b" =~ \. ]]; then
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# only descend the version hierarchy of b
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local b_short="$(echo "$b" | sed 's/^[0-9]*\.//')"
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cmp_version "0" "$b_short"
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else
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# no descend possible: treat as equal
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echo "0"
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fi
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}
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function adapt_file
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{
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# parameters
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local old_filename="$1"
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local new_version="${2:-$new_version}"
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# derivatives
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local script="$(basename $0)"
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local txt="toolchains"
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local dirname="$(dirname $old_filename)"
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local new_filename="$dirname/$(basename $old_filename | sed 's/\.v[^.]*$//').v$new_version"
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# filter any intermediate versions
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local med_filename="$old_filename"
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local old_version=""
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local this_version=""
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local i
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for i in $old_filename $old_filename.v*; do
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if ! [[ -s "$i" ]]; then
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continue
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fi
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this_version="$(echo "$i" | grep -o "[0-9.]*$")"
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if [[ "$this_version" = "" ]]; then
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continue
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fi
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# ignore out-of-bounds versions
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local cond_A=0
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if [[ "$old_version" = "" ]] || (( $(cmp_version "$old_version" "$this_version") <= 0 )); then
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(( cond_A++ ))
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fi
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local cond_B=0
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if [[ "$new_version" = "" ]] || (( $(cmp_version "$this_version" "$new_version") <= 0 )); then
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(( cond_B++ ))
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fi
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if (( !cond_A || !cond_B )); then
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continue
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fi
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# remember any better matching versions
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old_version=$this_version
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med_filename="$i"
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done
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echo "TRANSFER $med_filename -> $new_filename"
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# checks
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if [[ "$new_filename" = "$med_filename" ]]; then
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echo "Sorry, no change in filename."
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exit 1
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fi
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# Step 1: rename the old file to the new one
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echo git mv $med_filename $new_filename
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git mv $med_filename $new_filename || exit $?
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echo "git commit -m \"$txt: git mv $med_filename -> $new_filename\""
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git commit --no-interactive -m "$txt: git mv $med_filename -> $new_filename" || exit $?
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# Step 2: resurrect the old file and content
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echo cp -a $new_filename $med_filename
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cp -a $new_filename $med_filename || exit $?
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echo git add $med_filename
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git add $med_filename || exit $?
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echo "git commit -m \"$txt: resurrect $med_filename\""
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git commit --no-interactive -m "$txt: resurrect $med_filename" || exit $?
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echo "SUCCESS $med_filename -> $new_filename"
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}
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git reset || exit $?
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git checkout . || exit $?
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# Current upstream dependencies of files.
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# May change in future.
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adapt_file kernel/Kconfig
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adapt_file kernel/Kbuild
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