diff options
Diffstat (limited to 'pkgs')
| -rw-r--r-- | pkgs/populate/default.nix | 67 | ||||
| -rw-r--r-- | pkgs/populate/flake-jq.nix | 70 |
2 files changed, 71 insertions, 66 deletions
diff --git a/pkgs/populate/default.nix b/pkgs/populate/default.nix index bd7e5e4..f3cf925 100644 --- a/pkgs/populate/default.nix +++ b/pkgs/populate/default.nix @@ -259,6 +259,7 @@ let pop.flake = target: source: pop.flake-input target (source // { name = null; }); pop.flake-input = target: source: let + inherit (import ./flake-jq.nix) selected selfIsRemote selfLocked; nix' = "${nix}/bin/nix --extra-experimental-features ${quote "nix-command flakes"}"; inputPath = if source.name == null then [] else splitString "/" source.name; fetchOnTarget = source.fetchOnTarget or false; @@ -291,72 +292,6 @@ let ${quote source.flake} ${quote (toString source.name)} exit 1 ''; - # jq definitions for subdirectories containing flakes, which flake - # references and lock entries name either as attribute dir or as query - # parameter dir of their URL, depending on the version of Nix. fetchTree - # supports neither. - subdirs = /* jq */ '' - def subdir: - .dir // ((.url // "") | capture("[?&]dir=(?<dir>[^&]*)").dir) // ""; - def withoutSubdir: - del(.__final, .dir) - | if (.url | type) == "string" then - .url |= (sub("(?<sep>[?&])dir=[^&]*&?"; "\(.sep)") | sub("[?&]$"; "")) - else . end; - def subdirOf($node): - [$node.locked, $node.original] - | map(select(. != null) | subdir | select(. != "")) - | first // ""; - ''; - # jq filter selecting the flake or input in nix flake metadata's output, - # by the path of input names $input, as what to fetch and the - # subdirectory containing it: {self, locked, subdir}. Names follow the - # flake's lock file, follows included; an empty follows path removes an - # input. The flake itself, and inputs given by paths relative to it, have - # self set instead of fetchTree arguments in locked. - selected = /* jq */ '' - ${subdirs} - . as $m - | .locks as $l - | def ref($path; $depth): - if $depth > 64 then error("follows nest too deep") else - reduce $path[] as $name ($l.root; - (($l.nodes[.].inputs // {})[$name]) as $next - | if $next == null or $next == [] then error("no input \($name)") - elif ($next | type) == "array" then ref($next; $depth + 1) - else $next end) - end; - def join($a; $b): - if $a == "" then $b elif $b == "" then $a else "\($a)/\($b)" end; - def resolve($key; $depth): - $l.nodes[$key] as $node - | if $depth > 64 then error("parents nest too deep") - elif $key == $l.root then - { self: true, locked: null, subdir: subdirOf($m) } - elif $node.parent != null then - resolve(ref($node.parent; 0); $depth + 1) as $base - | $base + { - subdir: join(join($base.subdir; - $node.locked.path | ltrimstr("./") | rtrimstr("/") | if . == "." then "" else . end); - subdirOf($node)) - } - else - { self: false, locked: ($node.locked | withoutSubdir), subdir: subdirOf($node) } - end; - resolve(ref($input; 0); 0) - ''; - # jq filter telling whether the target can fetch the flake itself, i.e. - # whether its locked reference doesn't refer to the deploying machine. - selfIsRemote = /* jq */ '' - .locked | (.type != "path") and ((.url // "") | startswith("file:") | not) - ''; - # jq filter replacing self in the selection $selected with the flake's - # locked reference. - selfLocked = /* jq */ '' - ${subdirs} - .locked as $self - | $selected + { self: false, locked: ($self | withoutSubdir) } - ''; # Shell function printing the store path $1, followed by the inputs its # flake in the subdirectory $2 pins in its own lock file, using the nix # command nix. Without a lock file, locking would change the flake, so diff --git a/pkgs/populate/flake-jq.nix b/pkgs/populate/flake-jq.nix new file mode 100644 index 0000000..41edcc5 --- /dev/null +++ b/pkgs/populate/flake-jq.nix @@ -0,0 +1,70 @@ +# jq programs populate uses for flake and flake-input sources, in a file of +# their own, so tests can run them. +rec { + # jq definitions for subdirectories containing flakes, which flake + # references and lock entries name either as attribute dir or as query + # parameter dir of their URL, depending on the version of Nix. fetchTree + # supports neither. + subdirs = /* jq */ '' + def subdir: + .dir // ((.url // "") | capture("[?&]dir=(?<dir>[^&]*)").dir) // ""; + def withoutSubdir: + del(.__final, .dir) + | if (.url | type) == "string" then + .url |= (sub("(?<sep>[?&])dir=[^&]*&?"; "\(.sep)") | sub("[?&]$"; "")) + else . end; + def subdirOf($node): + [$node.locked, $node.original] + | map(select(. != null) | subdir | select(. != "")) + | first // ""; + ''; + # jq filter selecting the flake or input in nix flake metadata's output, + # by the path of input names $input, as what to fetch and the + # subdirectory containing it: {self, locked, subdir}. Names follow the + # flake's lock file, follows included; an empty follows path removes an + # input. The flake itself, and inputs given by paths relative to it, have + # self set instead of fetchTree arguments in locked. + selected = /* jq */ '' + ${subdirs} + . as $m + | .locks as $l + | def ref($path; $depth): + if $depth > 64 then error("follows nest too deep") else + reduce $path[] as $name ($l.root; + (($l.nodes[.].inputs // {})[$name]) as $next + | if $next == null or $next == [] then error("no input \($name)") + elif ($next | type) == "array" then ref($next; $depth + 1) + else $next end) + end; + def join($a; $b): + if $a == "" then $b elif $b == "" then $a else "\($a)/\($b)" end; + def resolve($key; $depth): + $l.nodes[$key] as $node + | if $depth > 64 then error("parents nest too deep") + elif $key == $l.root then + { self: true, locked: null, subdir: subdirOf($m) } + elif $node.parent != null then + resolve(ref($node.parent; 0); $depth + 1) as $base + | $base + { + subdir: join(join($base.subdir; + $node.locked.path | ltrimstr("./") | rtrimstr("/") | if . == "." then "" else . end); + subdirOf($node)) + } + else + { self: false, locked: ($node.locked | withoutSubdir), subdir: subdirOf($node) } + end; + resolve(ref($input; 0); 0) + ''; + # jq filter telling whether the target can fetch the flake itself, i.e. + # whether its locked reference doesn't refer to the deploying machine. + selfIsRemote = /* jq */ '' + .locked | (.type != "path") and ((.url // "") | startswith("file:") | not) + ''; + # jq filter replacing self in the selection $selected with the flake's + # locked reference. + selfLocked = /* jq */ '' + ${subdirs} + .locked as $self + | $selected + { self: false, locked: ($self | withoutSubdir) } + ''; +} |