Use grep -Po for tag_name and browser_download_url extraction globally; cache API responses for arch-specific checks

[Copilot]

The mawk-based JSON field extraction (/^ *"field": "[^"]*",$/{print $4}) fails silently when GitHub returns single-line JSON, causing version detection to fall back to hardcoded values. grep -Po with PCRE \K works on both single- and multi-line responses.

dietpi/dietpi-software

• Replace all mawk tag_name patterns with grep -Po '"tag_name": *"\K[^"]+' (FreshRSS, ruTorrent, Box86, Box64, Immich ×2; Uptime Kuma was already fixed)
• Replace all mawk -F\" browser_download_url patterns with grep -Po equivalents (41 patterns across all software entries)

.github/workflows/update_urls.bash

tag_name pattern fix (7 entries):

# Before
aCHECK[$software_id]='curl -sSf '\''https://api.github.com/.../releases/latest'\'' | mawk -F\" '\''/^ *"tag_name": "[^"]*",$/{print $4}'\'
# After
aCHECK[$software_id]='curl -sSf '\''https://api.github.com/.../releases/latest'\'' | grep -Po '\''"tag_name": *"\K[^"]+'\'

browser_download_url pattern fix (39 entries):

# Before (double-quoted, with arch vars)
aCHECK[$software_id]='echo "$response" | mawk -F\" "/^ *\"browser_download_url\": \".*PATTERN\"$/{print \$4}"'
# After
aCHECK[$software_id]='echo "$response" | grep -Po "\"browser_download_url\": *\"\K[^\"]*PATTERN"'

# Before (single-quoted, static pattern, with '\'' quoting in aCHECK)
aCHECK[$software_id]='curl -sSf '\''URL'\'' | mawk -F\" '\''/^ *"browser_download_url": ".*PATTERN"$/{print $4}'\'
# After
aCHECK[$software_id]='curl -sSf '\''URL'\'' | grep -Po '\''"browser_download_url": *"\K[^"]*PATTERN'\'

Special cases: the Forgejo mawk -v RS=, pattern (for single-line JSON) is replaced with grep -Po "..." | head -1 to replicate the original {exit} first-match behaviour.

Response caching for all 32 aARCH entries — avoids N redundant curl calls (one per architecture) per software ID:

• Add aURL[$software_id]='https://...' for every entry with aARCH defined
• Replace curl 'URL' | with echo "$response" | in aCHECK
• Loop fetches once before the arch iteration:

response=
if [[ ${aURL[i]} ]]
then
    if [[ ${GH_TOKEN} && ${aURL[i]} == 'https://api.github.com/'* ]]
    then
        response=$(curl -sSf -H "Authorization: token $GH_TOKEN" "${aURL[i]}")
    else
        response=$(curl -sSf "${aURL[i]}")
    fi
fi

• The existing GitHub token string-substitution in aCHECK is retained with a comment clarifying it only applies to entries without aURL

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[MichaIng]

@copilot
Please apply the mawk => grep -Po migration as well to those GitHub API calls where we match browser_download_url.

[Copilot]

@copilot
Please apply the mawk => grep -Po migration as well to those GitHub API calls where we match browser_download_url.

Done in commit dc7808b. All mawk -F\" patterns for browser_download_url have been migrated to grep -Po in both files:

• dietpi/dietpi-software: 41 patterns converted (31 double-quoted with $arch/other vars, 8 single-quoted static, 1 EasyRSA special without ^ * prefix, 1 Forgejo RS=, with | head -1 added to replicate mawk's {exit} behavior)
• .github/workflows/update_urls.bash: 39 patterns converted (30 double-quoted using echo "$response", 8 single-quoted with '\'' quoting in aCHECK assignments, 1 Forgejo RS=, with | head -1)