forked from mirrors/nixpkgs
133 lines
4.8 KiB
Bash
133 lines
4.8 KiB
Bash
# Unlinks a directory (given as the first argument), and re-creates that
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# directory as an actual directory. Then descends into the directory of
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# the same name in the origin (arg_2/arg_3) and symlinks the contents of
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# that directory into the passed end-location.
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unlinkDirReSymlinkContents() {
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local dirToUnlink="$1"
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local origin="$2"
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local contentsLocation="$3"
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unlink $dirToUnlink/$contentsLocation
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mkdir -p $dirToUnlink/$contentsLocation
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for f in $origin/$contentsLocation/*; do
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ln -s -t "$dirToUnlink/$contentsLocation" "$f"
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done
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}
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# Using unlinkDirReSymlinkContents, un-symlinks directories down to
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# $out/share/octave, and then creates the octave_packages directory.
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createOctavePackagesPath() {
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local desiredOut=$1
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local origin=$2
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if [ -L "$out/share" ]; then
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unlinkDirReSymlinkContents "$desiredOut" "$origin" "share"
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fi
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if [ -L "$out/share/octave" ]; then
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unlinkDirReSymlinkContents "$desiredOut" "$origin" "share/octave"
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fi
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# Now that octave_packages has a path rather than symlinks, create the
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# octave_packages directory for installed packages.
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mkdir -p "$desiredOut/share/octave/octave_packages"
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}
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# First, descends down to $out/share/octave/site/m/startup/octaverc, and
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# copies that start-up file. Once done, it performs a `chmod` to allow
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# writing. Lastly, it `echo`s the location of the locally installed packages
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# to the startup file, allowing octave to discover installed packages.
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addPkgLocalList() {
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local desiredOut=$1
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local origin=$2
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local octaveSite="share/octave/site"
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local octaveSiteM="$octaveSite/m"
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local octaveSiteStartup="$octaveSiteM/startup"
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local siteOctavercStartup="$octaveSiteStartup/octaverc"
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unlinkDirReSymlinkContents "$desiredOut" "$origin" "$octaveSite"
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unlinkDirReSymlinkContents "$desiredOut" "$origin" "$octaveSiteM"
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unlinkDirReSymlinkContents "$desiredOut" "$origin" "$octaveSiteStartup"
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unlink "$out/$siteOctavercStartup"
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cp "$origin/$siteOctavercStartup" "$desiredOut/$siteOctavercStartup"
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chmod u+w "$desiredOut/$siteOctavercStartup"
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echo "pkg local_list $out/.octave_packages" >> "$desiredOut/$siteOctavercStartup"
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}
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# Wrapper function for wrapOctaveProgramsIn. Takes one argument, a
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# space-delimited string of packages' paths that will be installed.
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wrapOctavePrograms() {
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wrapOctaveProgramsIn "$out/bin" "$out" "$@"
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}
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# Wraps all octave programs in $out/bin with all the propagated inputs that
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# a particular package requires. $1 is the directory to look for binaries in
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# to wrap. $2 is the path to the octave ENVIRONMENT. $3 is the space-delimited
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# string of packages.
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wrapOctaveProgramsIn() {
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local dir="$1"
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local octavePath="$2"
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local pkgs="$3"
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local f
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buildOctavePath "$octavePath" "$pkgs"
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# Find all regular files in the output directory that are executable.
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if [ -d "$dir" ]; then
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find "$dir" -type f -perm -0100 -print0 | while read -d "" f; do
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echo "wrapping \`$f'..."
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local -a wrap_args=("$f"
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--prefix PATH ':' "$program_PATH"
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)
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local -a wrapProgramArgs=("${wrap_args[@]}")
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wrapProgram "${wrapProgramArgs[@]}"
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done
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fi
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}
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# Build the PATH environment variable by walking through the closure of
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# dependencies. Starts by constructing the `program_PATH` variable with the
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# environment's path, then adding the original octave's location, and marking
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# them in `octavePathsSeen`.
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buildOctavePath() {
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local octavePath="$1"
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local packages="$2"
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local pathsToSearch="$octavePath $packages"
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# Create an empty table of Octave paths.
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declare -A octavePathsSeen=()
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program_PATH=
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octavePathsSeen["$out"]=1
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octavePathsSeen["@octave@"]=1
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addToSearchPath program_PATH "$out/bin"
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addToSearchPath program_PATH "@octave@/bin"
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echo "program_PATH to change to is: $program_PATH"
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for path in $pathsToSearch; do
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echo "Recurse to propagated-build-input: $path"
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_addToOctavePath $path
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done
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}
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# Adds the bin directories to the program_PATH variable.
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# Recurses on any paths declared in `propagated-build-inputs`, while avoiding
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# duplicating paths by flagging the directires it has seen in `octavePathsSeen`.
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_addToOctavePath() {
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local dir="$1"
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# Stop if we've already visited this path.
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if [ -n "${octavePathsSeen[$dir]}" ]; then return; fi
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octavePathsSeen[$dir]=1
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# addToSearchPath is defined in stdenv/generic/setup.sh. It has the effect
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# of calling `export X=$dir/...:$X`.
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addToSearchPath program_PATH $dir/bin
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# Inspect the propagated inputs (if they exist) and recur on them.
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local prop="$dir/nix-support/propagated-build-inputs"
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if [ -e $prop ]; then
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for new_path in $(cat $prop); do
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_addToOctavePath $new_path
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done
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fi
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}
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