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files/mutable-files: refactor fetch script generation

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Taking advantage of Nix's lazyness, at least.
This commit is contained in:
Gabriel Arazas 2023-12-23 18:41:51 +08:00
parent cf5ad9ce3c
commit 6d2d1dc5af
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1 changed files with 35 additions and 23 deletions
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58
modules/home-manager/files/mutable-files.nix
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@ -3,6 +3,37 @@
let
cfg = config.home.mutableFile;
# An attribute set to be used to get the fetching script.
fetchScript = path: value: let
url = lib.escapeShellArg value.url;
path = lib.escapeShellArg value.path;
extraArgs = lib.escapeShellArgs value.extraArgs;
in {
git = ''
[ -d ${path} ] || git clone ${extraArgs} ${url} ${path}
'';
fetch = ''
[ -e ${path} ] || curl ${extraArgs} ${url} --output ${path}"
'';
archive = let
extractScript =
if (value.extractPath == null) then
''arc unarchive "/tmp/$filename" ${path}''
else
''arc extract "/tmp/$filename" ${lib.escapeShellArg value.extractPath} ${path}'';
in
''
[ -e ${path} ] || {
filename=$(curl ${extraArgs} --output-dir /tmp --silent --show-error --write-out '%{filename_effective}' --remote-name --remote-header-name --location ${url})
${extractScript}
}
'';
gopass = ''
[ -e ${path} ] || gopass clone ${extraArgs} ${url} --path ${path} ${extraArgs}
'';
custom = "[ -e ${path} ] || ${extraArgs}";
};
fileType = baseDir: { name, config, options, ... }: {
options = {
url = lib.mkOption {
@ -124,30 +155,11 @@ in
ExecStart =
let
mutableFilesCmds = lib.mapAttrsToList
(path: value:
let
url = lib.escapeShellArg value.url;
path = lib.escapeShellArg value.path;
extraArgs = lib.escapeShellArgs value.extraArgs;
isFetchType = type: lib.optionalString (value.type == type);
in
(path: value: let
fetchScript' = (fetchScript path value).${value.type};
in
''
${isFetchType "git" "[ -d ${path} ] || git clone ${extraArgs} ${url} ${path}"}
${isFetchType "fetch" "[ -e ${path} ] || curl ${extraArgs} ${url} --output ${path}"}
${isFetchType "archive" ''
[ -e ${path} ] || {
filename=$(curl ${extraArgs} --output-dir /tmp --silent --show-error --write-out '%{filename_effective}' --remote-name --remote-header-name --location ${url})
${if (value.extractPath != null) then
''arc extract "/tmp/$filename" ${lib.escapeShellArg value.extractPath} ${path}''
else
''arc unarchive "/tmp/$filename" ${path}''
}
}
''}
${isFetchType "gopass" ''
[ -e ${path} ] || gopass clone ${extraArgs} ${url} --path ${path} ${extraArgs}
''}
${isFetchType "custom" "[ -e ${path} ] || ${extraArgs}"}
${fetchScript'}
${value.postScript}
'')
cfg;